FILTER BAG APPARATUS FOR COLLECTING DUST

Abstract

A filter bag apparatus for a vacuum-cleaning unit is arrangeable in a vacuum-cleaning unit accommodation space of the unit and has a filter bag having a dust accommodation space for collecting dust. The apparatus has a closure device for closing off the bag outlet that includes a hose body arranged on a bag outlet and having a hose outlet flow-connected to the bag outlet for emptying dust out of the dust accommodation space. The body extends along a longitudinal expanse between the bag and hose outlets, and has a wrapper section between the bag and hose outlets that can be wrapped up toward the bag outlet, from a pass-through position for emptying the dust out of the dust accommodation space and is unwrapped, in particular elongated, along a wrapper path, into a wrapped position, in which the bag outlet is closed off to form a wrapper.

Claims

1. A filter bag apparatus for a vacuum-cleaning unit, wherein the filter bag apparatus can be arranged in a vacuum-cleaning unit accommodation space of the vacuum-cleaning unit and has a filter bag having a dust accommodation space for collecting dust, wherein the filter bag comprises, at least in part, a filter material through which air can flow and that retains dust in the dust accommodation space, wherein the filter bag apparatus has a bag inlet that can be connected to a suction inlet of the vacuum-cleaning units, the inlet being provided for inflow of a suction stream charged with dust, into the dust accommodation space, wherein a connection adapter for a connection to the suction inlet of the vacuum-cleaning unit is arranged on the bag inlet, wherein the connection adapter has a wall body that is plate-shaped and/or more rigid as compared with the filter material, the wall body having a pass-through opening configured as a plug-in holder, into which a tubular body that is flow-connected to the suction inlet of the vacuum-cleaning unit can be inserted, wherein a bag outlet for emptying dust out of the dust accommodation space is arranged in an outlet region of the filter bag, wherein the filter bag apparatus has a closure device for closing off the bag outlet, wherein the closure device comprises a hose body arranged on the bag outlet, the hose body having a hose outlet that is flow-connected to the bag outlet, for emptying dust out of the dust accommodation space, wherein the hose body extends along a longitudinal expanse between the bag outlet and the hose outlet and has a wrapper section between the bag outlet and the hose outlet, the wrapper section being able to be wrapped up into a wrapper toward the bag outlet, from a pass-through position that is provided for emptying the dust out of the dust accommodation space, in which position the wrapper section is unwrapped, in particular elongated, along a wrapping path, into a wrapped position that closes off the bag outlet, wherein the closure device has a wrapper fixation device for fixing the wrapper in place in the wrapped position, and wherein the wrapper fixation device, in a fixation position, counteracts unwrapping of the wrapper in the direction of the pass-through position, and, in a release position, releases the wrapper for unwrapping the wrapper into the pass-through position.

2. The filter bag apparatus according to claim 1, wherein the wrapper section, in particular the hose body as a whole, comprises a material or hose material that is different from the filter material and/or an air-impermeable material or hose material, and/or the wrapper section, in particular the hose body as a whole, has a different color from the filter bag in the region of the bag outlet or in total.

3. The filter bag apparatus according to claim 1, wherein the wrapper fixation device has at least one fastening element, in particular one arranged on the hose body, preferably in a fixed manner, which can be connected to at least one counter-fastening element for fixation of the wrapper, wherein the counter-fastening element is arranged on the hose body or is arranged or can be arranged on the vacuum-cleaning unit.

4. The filter bag apparatus according to claim 3, wherein at least one of the fastening element and the counter-fastening element is arranged on a tab arranged on the hose body, the tab projecting, in particular in the direction of a wrapper axis, about which the wrapper is wrapped up or provided for wrapping the wrapper up, in front of the wrapper, or can be brought into a position in which the tab projects in front of the wrapper.

5. The filter bag apparatus according to claim 3, wherein the fastening element and the counter-fastening element are arranged on the hose body and, in the fixation position of the wrapper fixation device, are in engagement with one another, wherein at least one of the fastening element and the counter-fastening element is shifted in the direction toward a longitudinal center of the wrapper, transverse to the longitudinal expanse of the hose body.

6. The filter bag apparatus according to claim 3, wherein a maximal transverse width of the bag outlet, when walls of the filter bag that delimit the bag outlet lie on top of one another and, in particular, when the bag outlet forms a narrow slit that extends in a longitudinal expanse direction, amounts to maximally 80%, even further preferably maximally 70%, even further preferably maximally 60% of a distance between the fastening element and the counter-fastening element, when the fastening element and the counter-fastening element project away from one another maximally far from the hose body, directed parallel to a direction that determines the maximal transverse width of the bag outlet.

7. The filter bag apparatus according to claim 1, wherein the wrapper, in the wrapped position, has or forms at least one fastening projection that projects in front of the wrapper or can be brought into a position in which the at least one fastening projection projects in front of the wrapper in the region of the bag outlet, in the direction of a wrapper axis, about which axis the wrapper is wrapped up, or wherein the wrapper, in the wrapped position, has or forms at least one fastening projection on opposite sides, in each instance, wherein at least one of the fastening projections can be moved toward the other fastening projection and can be brought into holding engagement with this other fastening projection.

8. The filter bag apparatus according to claim 1, wherein the filter bag apparatus has no shoulder belts or carrying belts with which the filter bag apparatus can be carried, and/or the filter bag apparatus is not provided or configured for being carried in the manner of a backpack.

9. The filter bag apparatus according to claim 3, wherein at least one of the fastening element and the counter-fastening element is arranged on a longitudinal end of the hose body that has the hose outlet, and/or wherein in the pass-through position, a longitudinal distance of the fastening element and/or of the counter-fastening element to the hose outlet, in the direction of the longitudinal expanse of the hose section, is smaller than a longitudinal distance of the fastening element and/or of the counter-fastening element to the bag outlet.

10. The filter bag apparatus according to claim 1, wherein a maximal pass-through cross-section of the bag outlet is smaller than a maximal pass-through cross-section of the hose outlet, and/or wherein at least one of the filter bag, the hose body, and the wrapper section has a waistline or narrowing toward the bag outlet or in the region of the bag outlet, and/or wherein a maximal pass-through cross-section of the bag outlet is smaller than a maximal accommodation cross-section of the dust accommodation space in a region, in particular a center region between the bag outlet and the bag inlet, and/or wherein the bag outlet has a slit-shaped form.

11. The filter bag apparatus according to claim 1, wherein the wrapper fixation device, in the fixation position, does not engage around or enchamber the wrapper in a region of the wrapper that lies opposite the bag outlet, or does so by maximally 80%, and/or the wrapper, in the wrapped position, when the wrapper fixation device assumes the fixation position, in a region that lies opposite the bag outlet, can be moved in such a manner that a part of the hose section can be moved and facilitates or increases a mobility of at least one wall of the filter bag that makes a transition into the hose section.

12. The filter bag apparatus according to claim 1, wherein on the wrapper section, in particular on the hose outlet, a wrapping aid that facilitates wrapping up the wrapper, in particular a depression that extends transverse to a wrapping direction provided for wrapping up the wrapper section, or a longitudinal expanse of the hose body, or a pleat-shaped reinforcement for wrapping up the wrapper is provided.

13. The filter bag apparatus according to claim 1, wherein at the pass-through opening of the connection adapter, a sealing body or a membrane is provided for sealing contact to the tubular body of the vacuum-cleaning unit, and/or wherein the pass-through opening is surrounded by a narrow side of the wall body.

14. The filter bag apparatus for a vacuum-cleaning unit, wherein the filter bag apparatus can be arranged in a vacuum-cleaning unit accommodation space of the vacuum-cleaning unit, and has a filter bag having a dust accommodation space for collecting dust, wherein the filter bag comprises, at least in part, a filter material through which air can flow and that retains dust in the dust accommodation space, wherein the filter bag has an inlet wall having a bag inlet that is provided for inflow of a suction stream, which is charged with dust, into the dust accommodation space, wherein a bag outlet for emptying dust out of the dust accommodation space is provided on an outlet region of the filter bag that faces away from the inlet wall, wherein a closure device for closing off the bag outlet is arranged on the outlet region, wherein the closure device has a hose body that is arranged on the bag outlet and that has a hose outlet that is flow-connected to the bag outlet, for emptying dust out of the dust accommodation space, wherein the hose body is connected to side walls of the filter bag that surround the bag outlet, wherein the hose body extends along a longitudinal expanse between the bag outlet) and the hose outlet, wherein a wrapper section is provided on the hose body, or the hose body is configured as a wrapper section, wherein the wrapper section can be wrapped up from the hose outlet in the direction of the bag outlet, wherein the wrapper section, in the wrapped-up state, forms a wrapper that closes off the hose outlet and thereby the bag outlet, wherein the wrapper, in a position of rhe wrapper when the wrapper is wrapped up toward the bag outlet, forms fastening projections that project to the side in front of the side walls of the filter bag, wherein the fastening projections are flexible and can be shifted relative to one another or are bendable, so that a fastening element arranged on a fastening projection can be brought into fastening engagement with a counter-fastening element that is arranged on the other fastening projection, so that the wrapper, together with the fastening element and the counter-fastening element, forms a carrying handle, and the wrapper is fixed in place to prevent unwrapping.

15. The filter bag apparatus according to claim 1, wherein the fastening element and the counter-fastening element are arranged on a free end region of the hose body that faces away from the bag outlet, wherein the hose outlet is configured on the free end region, wherein the free end region of the hose body, in the wrapped-up state of the wrapper, is arranged in an interior of the wrapper.

16. The filter bag apparatus according to claim 1, wherein the filter bag apparatus can be collapsed into a flat state, in which side walls that lie opposite one another, in particular an upper side wall and a lower side wall of the filter bag lie on top of one another and, in particular, side walls of the hose body that lie opposite one another are folded and have parts that lie on top of one another.

17. The filter bag apparatus according to claim 16, wherein the walls of the hose body that lie on top of one another have a greater transverse width in the region of the hose outlet than the side walls of the filter bag that lie on top of one another in the region of the bag outlet.

18. The filter bag apparatus according to claim 1, wherein the filter bag has an upper side wall and a lower side wall, between which longitudinal side walls extend, wherein the upper side wall and the lower side wall as well as the longitudinal side walls delimit the dust accommodation space.

19. A vacuum-cleaning unit having the filter bag apparatus according to claim 1, wherein the vacuum-cleaning unit has a vacuum-cleaning unit accommodation space, in which the filter bag apparatus can be arranged.

20. The vacuum-cleaning unit according to claim 19, wherein at least a part of the wrapper fixation device is arranged on the vacuum-cleaning unit or formed by the vacuum-cleaning unit, and/or wherein the vacuum-cleaning unit accommodation space has an accommodation volume for accommodating the filter bag apparatus, wherein the accommodation volume is geometrically configured in such a manner that the accommodation volume can accommodate the filter bag apparatus when the dust accommodation space of the filter bag apparatus is already filled to at least 70%, preferably at least 80%, even further preferably at least 90% or 100% of a volume of the dust accommodation space.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0143] Other objects and features of the invention will become apparent from the following detailed description considered in connection with the accompanying drawings. It is to be understood, however, that the drawings are designed as an illustration only and not as a definition of the limits of the invention.

[0144] In the Drawings,

[0145] FIG. 1 shows a perspective slanted view of a known filter bag apparatus;

[0146] FIG. 2 shows a perspective slanted view of a vacuum-cleaning unit, with the upper housing part removed from its lower housing part;

[0147] FIG. 3 shows the lower housing part according to FIG. 2, as well as a schematically shown filter bag apparatus according to the invention, which is laid into the lower housing part and which will be shown in greater detail still in the subsequent figures;

[0148] FIG. 4 shows a front part of the lower housing part of the vacuum-cleaning unit, as well as a section of the filter bag apparatus according to FIG. 3, which is attached, in part, to a suction inlet of the vacuum-cleaning unit, approximately corresponding to a detail D1 in FIG. 2;

[0149] FIG. 5 shows the detail according to FIG. 4, but with a further installation progress of the filter bag apparatus in the vacuum-cleaning unit;

[0150] FIG. 6 shows the filter bag apparatus completely arranged in the vacuum-cleaning unit, approximately in the detail of FIGS. 4 and 5;

[0151] FIG. 7 shows a perspective slanted view of the vacuum-cleaning unit from above, during the course of placement of the upper housing part onto the lower housing part;

[0152] FIG. 8 shows a perspective slanted view of the upper housing part from a side that faces or is assigned to the lower housing part;

[0153] FIG. 9 shows a detail corresponding to FIG. 4, wherein the filter bag apparatus is partly removed again from the vacuum-cleaning unit 70 and, in particular, from its suction inlet;

[0154] FIG. 10 shows the arrangement according to FIG. 9, wherein a pass-through opening of the filter bag apparatus is partly closed off;

[0155] FIG. 11 shows the view corresponding to FIG. 10, but with the bag inlet of the filter bag apparatus completely closed;

[0156] FIG. 12 shows a schematic top view of the filter bag apparatus according to the above figures, when a wrapper section of the filter bag apparatus assumes a pass-through position;

[0157] FIG. 13 shows a detail D2 from FIG. 12 of the filter bag apparatus, wherein a wrapper has already been formed, in part, from the wrapper section;

[0158] FIG. 14 shows the view of the filter bag apparatus according to FIG. 13, but with the wrapper completely produced;

[0159] FIG. 15 shows the view of the filter bag apparatus according to FIGS. 13 and 14, but with the wrapper fixed in place by means of a wrapper fixation device;

[0160] FIG. 16 shows a top view of the lower housing part of the vacuum-cleaning unit, with the filter bag apparatus laid in;

[0161] FIG. 17 shows the view corresponding to FIG. 16, but at a slight slant from above, wherein the filter bag apparatus has been partly taken out of the lower housing part;

[0162] FIG. 18 shows the filter bag apparatus according to the above figures, in a perspective slanted view from above, with a carrying handle;

[0163] FIG. 19 shows a view similar to FIG. 18 of the filter bag apparatus, but with the wrapper fixation device disengaged;

[0164] FIG. 20 shows the filter bag apparatus according to the above figures, at a slant, in perspective, from the side, with its closure device in the pass-through position, which is provided for emptying the filter bag apparatus;

[0165] FIG. 21 shows the filter bag apparatus according to FIG. 20, but from the side;

[0166] FIG. 22 shows a part of the filter bag apparatus according to FIGS. 20 and 21, during emptying into a container;

[0167] FIG. 23 shows a longitudinal side wall of the filter bag apparatus, in the not yet completed or sewn state;

[0168] FIG. 24 shows a schematic representation of a hose body with a wrapper section that has projections as wrapping aids;

[0169] FIG. 25 shows a further schematic view of a hose body having a wrapper section that has depressions as wrapping aids;

[0170] FIG. 26 shows a schematic representation of a wrapper fixation device, which enchambers a wrapper of a hose body, in its release position; and

[0171] FIG. 27 shows the wrapper fixation device according to FIG. 26 in the fixation position.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0172] A vacuum-cleaning unit 70 has a housing 71 arrnged on wheels 76. See, e.g., FIG. 2. The housing 71 can be divided or is in two parts and has a lower housing part 72 for setting the vacuum-cleaning unit 70 down onto a substratum as well as an upper housing part 80. The lower housing part 72 and the upper housing part 80 can be connected to one another using holding elements 85.

[0173] The lower housing part 72 has a circumferential wall 73 as well as a bottom wall 74. See, e.g., FIG. 3.

[0174] The circumferential wall 73 comprises, for example, an end face 75, on which a suction inlet 77 is arranged.

[0175] The suction inlet 77 is flow-connected to a vacuum-cleaning unit accommodation space 78, which is delimited, on its circumference side, by the bottom wall 74 and the circumferential wall 73.

[0176] On a side that lies opposite the bottom wall 74, the vacuum-cleaning unit accommodation space 78 is closed off by means of the upper housing part 80, when this part is arranged on the lower housing part 72.

[0177] A suction motor 81 for generating a suction stream SM is arranged in the upper housing part 80. See, e.g., FIG. 2. The suction motor 81 can be operated, for example, using electrical energy storage units, in other words, for example, rechargeable battery packs, etc. Preferably, however, grid operation is provided, for which purpose a power cable 82 of the vacuum-cleaning unit 70 is present. Using the power cable 82, the suction motor 81 can be supplied with electricity.

[0178] To control the vacuum-cleaning unit 70, operating elements 83 are provided on the housing 71.

[0179] The vacuum-cleaning unit 70 can be configured for dedusting operation, i.e., a main filter 84, for example, which precedes the suction motor 81 and is arranged between the vacuum-cleaning unit accommodation space 78 and the suction motor 81, can be dedusted by means of a mechanical effect, by means of a counter-stream that flows through counter to the direction of the suction stream SM that normally flows through the main filter 84, or the like. Thereby dust S is then collected directly in the vacuum-cleaning unit accommodation space 78. The vacuum-cleaning unit accommodation space 78 is subsequently emptied again, i.e., dust S is removed from it by means of opening the housing 71.

[0180] Filter bags, however, can also be used, which are disposed of as a whole, after use.

[0181] Nevertheless, an advantageous concept that is very hygienic for the operator provides, alternatively or supplementally to the use of filter bags that are disposed of, for the use of a filter bag apparatus 10 that will be described below:

[0182] By means of removing the upper housing part 80 from the lower housing part 72, the filter bag apparatus 10 can be brought into the vacuum-cleaning unit accommodation space 78 or removed from it. For this purpose, the holding elements 85 are released.

[0183] The filter bag apparatus 10 comprises a filter bag 11. The filter bag 11 comprises a dust accommodation space 13 that is provided for collecting dust S. The dust accommodation space 13 is enclosed by filter material of the filter bag 11, through which air can flow, on the one hand, but on the other hand it retains dust S in the dust accommodation space 13.

[0184] The filter bag 11 is configured, for example, as a block-shaped bag. For example, the filter bag 11 comprises an inlet wall or end face 14, which extends between a lower side wall or bottom wall 15 and an upper side wall or cover wall 16.

[0185] A rear wall 18 optionally lies opposite the end face 14.

[0186] Side walls or longitudinal side walls 17 extend between the rear wall 18 and the end face 14 as well as the bottom wall 15 and the cover wall 16.

[0187] It is also possible, however, that the bottom wall 15 and the cover wall 16 are directly connected to one another on a side that lies opposite the end face 14 or a side of the filter bag 11 that is opposed to the end face 14, or that the rear wall 18 is less high than the end face 14, so that the bottom wall 15 and the cover wall 16 have a greater distance from one another in the region of the end face 14 than in the region of the rear wall 18. In the representation according to FIG. 20, for example, one of the side walls 17 is turned outward in the region of the end face 14, so that it covers a section of the bottom wall 15 that is shown with a broken line. This section can also be understood to be a rear wall 18.

[0188] At the longitudinal side walls 17, folds 19 can be provided, so that the filter bag 11 can be brought from a flat position, in which the bottom wall 15 and the cover wall 16 lie against one another or are arranged at a slight distance from one another, into an inflated or extracted state, in which the cover wall 16 has a maximal distance from the bottom wall 15. This extracted or also inflated state occurs, for example, during suction operation of the vacuum-cleaning unit 70, when the suction motor 81 generates a corresponding suction stream SM, which flows through the filter bag 11 and thereby inflates it.

[0189] In FIG. 21, it is shown that the longitudinal side walls 17 are unfolded, so to speak, and project laterally in front of the cover wall 16.

[0190] It is advantageous if the longitudinal side walls 17 have a dart 19A, for example, in the region of the bag outlet 25. For example, the longitudinal side wall 17, which in itself is rectangular in terms of its outer contour, can have a triangular cutout in the region of the bag outlet 25, the side edges 19B of which are sewn together, thereby forming the darts 19A.

[0191] The walls of the filter bag 11, in other words, for example, the end face 14, the bottom wall 15, the cover wall 16, as well as the longitudinal side walls 17 and the optional rear wall 18, are sewn together and/or bonded together or the like, for example. Seams 28 are provided as an example.

[0192] The longitudinal side walls 17 as well as the cover wall 16 and/or the bottom wall 15 can also be configured as a hose body or hose element, i.e., for example, can make a seamless transition into one another.

[0193] When the suction motor 81 is turned off, the filter bag 11 collapses into itself, so to speak, i.e., the cover wall 16, which lies opposite a suction inlet and/or a main filter 84 of the vacuum-cleaning unit 70 during suction operation and in the assembled state, and is drawn against it by suction, collapses in the direction of the bottom wall 15. When the suction motor 81 is shut off, the cover wall 16 is no longer impacted with suction force by the suction motor 81, in the direction of the upper housing part 80 and thereby away from the bottom wall 15. When the cover wall 16 collapses toward the bottom wall 15, dirt that adheres to the cover wall 16 can fall off the cover wall 16 in the direction of the dust accommodation space 13. Thereby a self-cleaning effect of the filter bag 11 is achieved, so to speak, when the vacuum-cleaning unit 70 is shut off. Consequently, therefore, the filter material 12 of the filter bag 11 is flexible.

[0194] A connection adapter 21 is provided at a bag inlet 20 of the filter bag 11, for a connection to the suction inlet 77 of the vacuum-cleaning unit 70. The connection adapter 21 comprises, for example, guide contours or holding contours 22 for engagement with adapter contours 79, 86 of the vacuum-cleaning unit 70, as well as a pass-through opening 23, which is flow-connected to the suction inlet 77 and/or lies opposite the suction inlet 77 in the state when the filter bag apparatus 10 is mounted on the vacuum-cleaning unit 70, i.e., when the connection adapter 21 is fastened to the suction inlet 77, so that a suction stream SM generated by the suction motor 81 can flow through the suction inlet 77 and through the pass-through opening 23 into the bag inlet 20 and thereby into the dust accommodation space 13.

[0195] The suction stream SM that flows into the suction inlet 77 is burdened with dust or similar other particles S, for example. The dust or the particles S. or both, are retained and collected in the filter bag apparatus 10.

[0196] The guide or holding contours 22 preferably comprise shape-fit contours, in particular shape-fit projections, of which one shape-fit projection can be inserted into the adapter contour 79, which is structured, for example, as a plug-in holder, and the other shape-fit projection forms a locking contour or holding contour for the adapter contour 86. The adapter contour 86, in contrast, is structured as a locking hook, for example, or has a locking hook, which can be brought into engagement with the other guide or holding contour 22 or the other shape-fit projection, which does not engage into the adapter contour 79.

[0197] The connection adapter 21 comprises, for example, a plate-shaped wall body 26, on which the bag inlet 20 is arranged. See, e.g., FIG. 18. The wall body 26 has a certain rigidity, so that the pass-through opening 23 forms a plug-in holder of the wall body 26, which is flow-connected to the bag outlet 25 and/or lies opposite to it and can be set onto a tubular body or nozzle 77A of the suction inlet 77 of the vacuum-cleaning unit 70.

[0198] The pass-through opening 23 is therefore configured, for example, as the plug-in holder, into which the nozzle or tubular body 77A can be inserted. A sealing body 27A, for example an elastic seal, a sealing membrane 27C or the like, is preferably arranged on the pass-through opening 23 or the plug-in holder formed thereby, which body has a ring-shaped insertion opening 27B configured as a pass-through. The tubular body or nozzle 77A can be inserted into the insertion opening 27B, wherein in the state of the tubular body or nozzle 77A when it is inserted into the sealing body 27A, the sealing body 27A lies against its outside circumference, forming a seal, and/or in a sealing seat, see FIG. 4, for example.

[0199] Preferably, a closure 24 is provided on the pass-through opening 23, using which the bag inlet 20 and thereby the filter bag apparatus 10 can be closed off on the input side.

[0200] The closure 24 can comprise, for example, a wall body 24A, which can be brought in front of the pass-through opening 23 using a sliding bearing. SSee, e.g., FIG. 11.

[0201] The closure 24 can also be configured, however, as a stopper 24B, for example, which can be inserted into the pass-through opening 23. Preferably, the stopper 24B is movably mounted on the filter bag apparatus 10 and/or held so as not to detach, for example using a flexible strip, rope or the like.

[0202] The bag inlet 20, however, does not necessarily have to be provided on the end face 14. A schematic representation in FIG. 16 shows a bag inlet 120, for example, which is arranged on the cover wall 16, for example on a connection adapter 121 that is arranged on the cover wall 16. The bag inlet 120 is flow-connected to a pass-through opening 123 of the connection adapter 121. Furthermore, the connection adapter 121 also preferably has a rigid and/or plate-shaped wall body 126. The pass-through opening 123 is preferably configured as a plug-in holder and/or insertion opening for a connection piece or tubular body in the manner of the nozzle 77A. Preferably, a membrane or another sealing body is also arranged on the pass-through opening 123.

[0203] The filter bag apparatus 10 and, in particular, the filter bag 11, have a bag outlet 25. The bag outlet 25 preferably lies opposite the bag inlet 20. The bag outlet 25 is formed, for example, essentially between the bottom wall 15 and the cover wall 16, which have a minimal distance from one another in the region of the bag outlet 25. There, for example, the bottom wall 15 and the cover wall 16 are directly connected to one another in the region of the longitudinal side walls 17, in other words on the outer sides of the bag outlet 25.

[0204] It is also possible that the longitudinal side walls 17 have a smaller expanse in the region of the bag outlet 25 than in a central section of the filter bag 11, between the bag outlet 25 and the bag inlet 20, for example.

[0205] The filter bag 11 can also be understood to be a hose-like or block-shaped body that extends between the bag inlet 20 and the bag outlet 25.

[0206] Now the filter bag apparatus 10 could fundamentally be disposed of when the accommodation space 13 is filled with dust S. In this case, for example, no bag outlet 25 would be provided. In the case of the filter bag apparatus 10, however, a simple but effective disposal concept is provided, in which the filter bag apparatus 10 can be conveniently emptied and subsequently re-used.

[0207] For this purpose, a closure device 30 is provided on the bag outlet 25. See, for example FIG. 12. The closure device 30 comprises a hose body 31. The hose body 31 extends along a longitudinal expanse L between the bag outlet 25 as well as a hose outlet 32 of the hose body 31, through which dust S can be emptied out of the dust accommodation space 13. The hose outlet 32 and the bag outlet 25 are flow-connected, i.e., dust S or a dust stream that exits from the bag outlet 25 can be emptied through the hose body 31, by way of the hose outlet 32, for example into a collection container M. For the purpose of and/or during emptying of dust S, the hose body 31 has an elongated shape, in other words a pass-through position D.

[0208] Proceeding from the pass-through position D, the hose body 31 can be completely or partially wrapped up, for which purpose the hose body 31 has a wrapper section 33. The wrapper section 33 can extend over an entire length of the hose body 31 with reference to the longitudinal expanse L, but also only over part of it. A length LW of the wrapper section 33 therefore preferably corresponds to the entire longitudinal expanse of the hose body 31 with reference to the longitudinal expanse L. In particular, the wrapper section 33 extends entirely or completely from the hose outlet 32 all the way to the bag outlet 25.

[0209] The wrapper section 33 can be wrapped up from the pass-through position D into a wrapped position W, in which the wrapper section 33 forms a wrapper 34.

[0210] It is advantageous if the wrapper 34 has multiple functions.

[0211] An essential function of the wrapper 34 is that it closes off the bag outlet 25. Two or three wrapping actions, for example, are sufficient to close off the bag outlet 25. Preferably, the wrapper 34 has two or three double layers, for example, of the material 35 of the hose body 31, which layers lie on top of one another. Each of these double layers comprises a pair of walls of the hose body 31 that lie on top of one another and are formed by the material 35.

[0212] It is advantageous if the hose body 31 consists of an air-impermeable material 35 that differs from the filter material 12 in this regard.

[0213] It would fundamentally also be possible that the material 35 also has an at least slight air permeability and/or is identical to the filter material 12, wherein the hose outlet 32 nevertheless can be closed off or is closed off with sufficient tightness for suction operation by means of the formation of the wrapper 34. The stacking of layers of the hose body 31 on top of one another, in the region of the wrapper 34, results in an air stream or an air exchange between the layers of the material and between the layers being no longer possible or at least being restricted to such an extent that a tightness suitable for suction operation can be achieved or is achieved.

[0214] The material 35 is preferably a different color from the filter material 12, so that an operator can easily recognize the function of the hose body 31 and, in particular, of the wrapper section 33, namely the function as a closure device 30, by means of the formation of the wrapper 34.

[0215] Furthermore, it is advantageous if the material 35 can be more easily wrapped up than the filter material 12 and/or is thinner than the filter material 12, thereby also facilitating the formation of the wrapper 34 or the production of the wrapper 34.

[0216] Optical differences, however, between the hose body 31, on the one hand, and the filter material 12 or the filter bag 11, on the other hand, are not absolutely necessary in order to recognize the functionality of the wrapper section 33.

[0217] It is advantageous if the hose outlet 32 is clearly larger than the bag outlet 25, in other words has a greater maximal opening cross-section, i.e., the hose body 31 is wider or larger in its free end region that faces away from the bag outlet 25 than in the region of the bag outlet 25. In total, the hose body 31, in particular when it lies flat, has a type of funnel-shaped or trapezoid form in a top view, for example, in such a manner that the larger opening cross-section of the funnel forms the hose outlet 32, and the smaller region marks the transition to the bag outlet 25.

[0218] Corresponding to the funnel-like or trapezoid form, at least one of the hose body 31 and the wrapper section 33 has or forms a projection 36, in each instance, in the region of the hose outlet 32, on opposite sides, which projection projects in front of the hose body 31 in the region of the bag outlet 25.

[0219] If the wrapper section 33 is now wrapped up, starting from the hose outlet 32, wherein, for example, wrapper layers 34A, 34B are formed and thereby ultimately a wrapper 34 is configured, the projections 36 project laterally in front of the filter bag 11 in the region of the bag outlet 25 and form fastening projections 37, the function of which will still become clearer.

[0220] In the exemplary embodiment, the wrapper 34 is configured by means of wrapping the wrapper section 33 up three times or four times, for example.

[0221] Wrapping of the wrapper 34 is facilitated by means of a wrapping aid 38. For example, markings 39 are configured on the wrapper section 38, transverse to the longitudinal expanse L, which simultaneously represents a wrapping direction WR, for example optical markings, pre-embossed bending channels, seams or the like, which facilitate wrapping up the wrapper section 33 to produce the wrapper 34. For example, the markings 39 can also represent folding aids or the like, i.e., the wrapper is produced by means of folding it up in the sense of wrapping it up.

[0222] Alternatively or additionally, the wrapping aid 38 comprises a reinforcement 40 that extends transverse to the longitudinal expanse L of the hose body 31 or the wrapping direction WR. Consequently, the reinforcement 40 therefore extends around a wrapper axis WA or along or parallel to a wrapper axis WA, about which the wrapper 34 is wrapped up. The preferably pleat-like reinforcement 40 could also be referred to as a pleated body reinforcement or a reinforcement that acts in the manner of a pleated body or axis body. In this regard, it is not necessary that the reinforcement 40 be round, but rather it can also be formed by a wall-like reinforcing material that is applied to the material 35.

[0223] In any case, the production of the wrapper 34 is very easily accomplished, in particular using the wrapping aid 38, wherein the projections 36 in front of the wrapper 34, which have already been explained above, project as fastening projections 37.

[0224] The fastening projections 37 form components of a wrapper fixation device 50. The wrapper fixation device 50 furthermore comprises tabs 51 that are fastened laterally on the hose body 31, close to the hose outlet 32. The tabs 51 are provided and/or arranged on the free end regions of the fastening projections 37.

[0225] The tabs 51 can be provided, for example, as an extension of the reinforcement 40, or be fastened to the latter. The tabs 51 preferably consist of a flexible material, for example of a textile strip material, a plastic strip, or the like.

[0226] In any case, the tabs 51 and/or the flexibility of the fastening projections 37 allow turning over or folding over the free end regions of the tabs 51, and thereby also the free end regions of the fastening projections 37, to a center 34M of the wrapper 34, when it is in the wrapped position W or has been wrapped up around the wrapper axis WA, so that fastening means arranged on the tabs 51, namely a fastening element 52, as well as a counter-fastening element 53 that acts together with it, can be brought into engagement with one another.

[0227] It is advantageous if the dimensions in the case of the filter bag apparatus 10 are chosen such that a transverse width QB of the bag outlet 25, in the wrapped position W of the wrapper 34 and/or when the walls that delimit the bag outlet 25 lie flat on top of one another, is smaller than a distance AB between the counter-fastening element 53 and the fastening element 52, for example amounts to maximally 80%, even further preferably maximally 70%, even further preferably maximally 60% of the distance AB between the fastening element 52 and the counter-fastening element 53. Thereby the fastening elements 52, 53 can be brought into engagement with one another, without thereby having to deform the bag outlet 25 significantly and/or having to deform regions of the walls that delimit the bag outlet 25 and are farthest away from one another, in a direction toward one another, in order to bring the fastening elements 52, 53 into engagement.

[0228] It is advantageous if it is provided that a transverse width QS of the hose outlet 32, when its walls that delimit the hose outlet 32 lie flat on top of one another, is greater than the transverse width QB, for example at least 50% greater, even further preferably at least 60% or 70% greater, even further preferably 80% or 90% greater than the transverse width QB. Preferably, it is provided that the transverse width QS is about twice as great as the transverse width QB.

[0229] If the transverse width QS is at least or approximately 90% greater than the transverse width QB, for example, as can be seen in FIG. 21, for example, the fastening elements 52, 53 can be fastened to the hose body 31 directly or with very short tabs 51. In this regard, a length of the tabs 51 preferably amounts to maximally 10% of the transverse width QS.

[0230] In the exemplary embodiment according to FIGS. 12 to 15, the tabs 51 are configured to be somewhat longer, so as to make the distance AB available, in the case of a narrower transverse width QS of the hose outlet 32, in such a manner that the distance QB amounts to maximally 80%, even further preferably maximally 70%, even further preferably maximally 60% of the distance AB.

[0231] The wrapper section 33 has a length LW, for example, that allows wrapping or flipping over the wrapper section 33 three times or four times, for example, to produce wrapper layers. It is advantageous if the length LW corresponds to at least half the transverse width QS. It is particularly preferred if the length LW amounts to at least 70% or at least 80% of the transverse width QS.

[0232] The fastening element 52 comprises a buckle 54, for example, which can be inserted into a buckle holder 55, which is made available or formed by the counter-fastening element 53. For example, the buckle 54 is a push-in buckle. Locking projections 56 can be provided on the buckle 54, which projections can be brought into locking engagement with locking holders 57 of the buckle holder 55. By means of activation of the locking projections 56 that engage into the locking holders 57, these can be brought out of engagement with the locking holders 57, so as to release the buckle 54 from the buckle holder 55, so as to bring the wrapper fixation device 50 into the release position R.

[0233] Consequently, the tabs 51 and the fastening projections 37 are therefore shifted relative to one another when the wrapper fixation device 50 assumes its fixation position F.

[0234] At the same time, a carrying handle 60 is formed by means of the fastening projections 37 that are connected to one another, which handle makes it possible for an operator to grasp the filter bag apparatus 10 and lift it out of the vacuum-cleaning unit accommodation space 78, for example as shown in FIG. 17.

[0235] As examples, hands H1 and H2 of an operator are shown, wherein the hand H1 grasps the carrying handle 60.

[0236] In this regard, it proves to be an advantage that the carrying handle 60 is arranged in an end region of the filter bag apparatus 10, at a distance from the bag inlet 20 and from the connection adapter 21, so that the filter bag apparatus 10 can be lifted up at the end that faces away from the suction inlet 77 or nozzle 77A, in that the operator pulls on the carrying handle 60. This arrangement can also allow for pulling the filter bag apparatus 10 off from the suction inlet 77 or nozzle 77A or to facilitate this.

[0237] Furthermore, the operator can easily grasp the filter bag apparatus 10 also on a side that is at a distance from the closure device 30 or on a side that is at a distance from the carrying handle 60; for example, the operator can grasp the connection adapter 21 with his hand H2, for example in the region of the guide or holding contours 22 or at the guide or holding contours 22. Thereby the filter bag apparatus 10 can easily be grasped on two opposite sides and lifted out of the vacuum-cleaning unit accommodation space 78.

[0238] Grasping the filter bag apparatus 10, among other things by the carrying handle 60, can also facilitate removal of the connection adapter from the suction inlet 77 and of the pass-through opening 23 from the nozzle 77A.

[0239] An advantage of the wrapper fixation device 50 can also be seen in that it fixes the wrapper 34 in place not directly in the region of the bag outlet 25 or directly in its center region, but rather at its side sections, between which the center section is arranged, so that the filter bag 11 can inflate all the way into the hose body 31, at least to a certain extent, during suction operation of the vacuum-cleaning unit 70, and this increases the mobility of the cover wall 16, in particular, and thereby also the possibility that dirt adhering to the cover wall 16, for example a filter cake, can fall off from the cover wall 16 more easily and/or the self-cleaning effect that has already been mentioned is improved or actually occurs for the first time, if applicable.

[0240] Alternatively to fastening of the wrapper 34 using the two fastening elements 52 and 53, at least one fastening element 152 and/or at least one counter-fastening element 153 shown, for example, in FIG. 16, could also be provided, for example, in the interior of the vacuum-cleaning unit 70, for example in the vacuum-cleaning unit accommodation space 78, for example a buckle 154 for the buckle holder 55 and/or a further buckle holder 155 into which the buckle 54 can be inserted.

[0241] Alternatively, in an embodiment shown in FIG. 14, it is also possible to fix the wrapper 34 in place, for example using a strip or fastening element 252, which is preferably arranged at a distance from the hose outlet 32, on the hose body 31 or wrapper section 33, and which, in the wrapped-up state or the wrapped position W of the wrapper 34, projects in front of the wrapper 34, so as to be brought into engagement with a counter-fastening element 253 of the filter bag apparatus 10, for example. The counter-fastening element 253 can be arranged on the hose body 31 or on the filter bag 11, preferably close to the bag outlet 25. The fastening element 252 comprises a buckle 254, for example, and the counter-fastening element 253 comprises a buckle holder 255.

[0242] It is also possible, however, that the fastening element 252 comprises only a strip that can be introduced, for example, into a clamping apparatus or holding apparatus formed by the counter-fastening element 253, and can be fixed in place, for example clamped, on this apparatus.

[0243] The fastening element 252 and the counter-fastening element 253 can be configured, for example, for a hook-and-loop connection, i.e., one of the two elements 252, 253 has hook-and-loop hooks and the other one has hook-and-loop loops.

[0244] The known filter bag apparatus 410 shown in FIG. 1 basically has the components that have already been described, for example a filter bag 411, which fundamentally has a similar structure to that of the filter bag 11, and an end face 14 on which the connection adapter 21 is arranged. The bag outlet 425 is provided with a closure device 430. The closure device 430 comprises a clamping body 431, for example, with which reinforcement contours 432 arranged on the bag outlet 425 can be clamped in place. For example, the reinforcement contours 432 are configured as pins, rods or the like, which can be clamped between clamping shanks of the clamping body 431.

[0245] In the case of a closure device 530 shown in a schematic side view in FIG. 24, which could be provided, for example, in place of the closure device 30, a hose body 531 is provided, which is actually similar to the hose body 31.

[0246] The hose body 531 has a wrapper section 533, which can be wrapped up. Wrapping the wrapper section 533 up succeeds more easily by means of an advantageous wrapping aid 538. The wrapping aid 538 has projections 540 that project in front of the material 35 or a side wall of the hose body 31 formed by means of the material 35, in particular rib-like projections 540, which facilitate wrapping up the wrapper section 533 to form a wrapper 34, for example. It is also possible that the projections 540 serve as folding aids, for example, so as to fold the material of the hose body 31 at the locations formed by the projections 540.

[0247] The hose body 531 is arranged on the filter bag 11 and, in particular, its bag outlet 25, for example, in place of the hose body 31 shown in FIG. 12.

[0248] A hose body 631 of a closure device 630 shown in FIG. 25 having a wrapper section 633 can also be arranged on the filter bag 11 in place of the hose body 31 or 531. The hose body 631 serves, in particular, for forming a wrapper or folded stack formed by means of folds. For example, the hose body 631, i.e., the material 35 of the hose body 631, has recesses 641 at multiple locations transverse to the longitudinal expanse L of the hose body 631, which recesses run transverse to the longitudinal expanse L. The recesses 641, just like the projections or reinforcements 540, preferably have a longitudinal shape and extend transverse to the longitudinal expanse L. In the transverse direction to the longitudinal expanse L, the recesses 641 and/or the reinforcements or projections 540 can be segmented. For example, the projections or reinforcements 540 can have recesses along their longitudinal direction. The recesses 641 also would not have to continuously have the same depth with reference to their longitudinal expanse.

[0249] The recesses 641 facilitate the formation of a folded stack as a wrapper, which then represents a wrapper 34, for example.

[0250] The wrapper 34 can also be fixed in place using an embodiment 750 shown in FIGS. 26 to 27 of the wrapper fixation device 50. The wrapper fixation device embodiment 750 has a fastening element 752 and a counter-fastening element 751. The two fastening elements 752, 751 are movably mounted on one another, for example, in particular mounted on one another so as to pivot. The fastening elements 752, 751 can be configured, for example, in the manner of staple legs. When the fastening elements 752, 751 assume their fixation position F, the wrapper 34 is enchambered in an accommodation chamber 758, so that it can no longer come loose. Only the section of the hose body 31 that projects away from the wrapper 34 can project out of the accommodation chamber 758, namely through a pass-through opening 759 that is provided between the fastening element 752 and the counter-fastening element 751. For example, the accommodation chamber 758 is provided partly in the fastening element 752 and partly in the counter-fastening element 751.

[0251] It is also possible, however, that the accommodation chamber 758 is arranged only in one of the elements, the fastening element 752 or the counter-fastening element 751, wherein the other fastening element 752 and counter-fastening element 751, in each instance, then closes off the accommodation chamber 758.

[0252] In the case of the filter bag apparatus 10 or for the filter bag apparatus 10, multiple wrapper fixation devices 50, 750 can be provided. Multiple corner fixation devices 50, 750 can have distances from one another with reference to the wrapper axis WA, for example, and fix the wrapper 34 in place, in each instance.

[0253] The fastening element 752 and/or the counter-fastening element 751 can be held on the filter bag apparatus 10 so as not to detach.

[0254] It is also possible that the fastening element 752 and the counter-fastening element 751 are configured as devices separate from the filter bag apparatus 10 and the vacuum-cleaning unit 70 and that the wrapper fixation device 50, 750 is a device separate from the filter bag apparatus 10 and the vacuum-cleaning unit 70, i.e., that preferably the wrapper fixation device 50, 750 can be completely removed from the filter bag apparatus 10.

[0255] The wrapper fixation device 50, 750 can be a device that is separate from the vacuum-cleaning unit 70.

[0256] The wrapper fixation device 50, 750 can be made available, for example, by the vacuum-cleaning unit 70, in whole or in part. For example, it is possible that at least one of the fastening element 752 and the counter-fastening element 751 is firmly attached to the vacuum-cleaning unit 70, or in a manner so as not to detach.

[0257] A variant can provide that one of the elements, fastening element 752 and/or counter-fastening element 751, or both, are arranged on the housing 71 of the vacuum-cleaning unit 70 or made available by the housing 71. It is possible, for example, that the counter-fastening element 751 is arranged on the lower housing part 72, and the fastening element 752 is arranged on the upper housing part 80. When, for example, the upper housing part 80 is lifted up from the lower housing part 72, the wrapper fixation device 50, 750 assumes its release position R at the same time, so that the wrapper 34 can be removed from the accommodation chamber 758. When the filter bag apparatus 10 is laid into the housing 71, the wrapper 34 is laid into the part of the accommodation chamber 758 of the counter-fastening element 751, and then the housing 71 is closed, i.e., the upper housing part 80 is moved to the lower housing part 72. In this way, the wrapper fixation device 50, 750 is also moved or can be moved into its fixation position F at the same time, i.e., the accommodation chamber 758 is closed.

[0258] Although only a few embodiments of the present invention have been shown and described, it is to be understood that many changes and modifications may be made thereunto without departing from the spirit and scope of the invention.