Apparatus for packing articles and comprising a device for counteracting winding up of film

Abstract

Disclosed herein is an apparatus for packing articles as well as a device for counteracting winding up of film or web material for an apparatus for packing articles, the packing being formed by at least one web material conveyed over at least one pulling roller, wherein the device for counteracting winding up is disposed in relation to the pulling roller and extending at least partially around the pulling roller, whereby is achieved an easy, secure and functional device that efficiently counteracts and obviates the possibility of web material being wound around a pulling roller.

Claims

1. An apparatus for packing articles, wherein the apparatus comprises a device for counteracting winding up of at least one web material and at least one pulling roller, wherein the packing is formed by conveying the at least one web material over the at least one pulling roller, wherein the device for counteracting winding up includes at least one spring element, and wherein the device for counteracting winding up is disposed relative to the pulling roller and extending at least partially around the pulling roller.

2. The apparatus for packing articles according to claim 1, wherein the device for counteracting winding up is provided directly or indirectly on an adjusting member disposed relative to the pulling roller.

3. The apparatus for packing articles according to claim 1, wherein at least a partial rotation of the adjusting member adjusts a spring tension of the at least one spring element.

4. The apparatus for packing articles according to claim 1, wherein the at least one spring element extends at least partially around the pulling roller.

5. The apparatus for packing articles according to claim 1, wherein the at least one spring element is configured to interact with at least one recess in the pulling roller.

6. The apparatus for packing articles according to claim 1, wherein the at least one spring element is disposed substantially symmetrically relative to the conveyed web material.

7. The apparatus for packing articles according to claim 1, wherein the spring element is at least one leaf spring.

8. The apparatus for packing articles according to claim 7, wherein the at least one leaf spring is between 0.00787 inch and 0.01575 inch in thickness.

9. The apparatus for packing articles according to claim 8, wherein the at least one leaf spring is between 0.00984 inch and 0.01378 inch in thickness.

10. The apparatus for packing articles according to claim 1, wherein the device for counteracting winding up is at least partly made of stainless steel.

Description

BRIEF DESCRIPTION

(1) Some of the embodiments will be described in detail, with references to the following Figures, wherein like designations denote like members, wherein:

(2) FIG. 1 shows an apparatus for packing in accordance with an embodiment;

(3) FIG. 2 shows the path of a web material past a pulling roller in accordance with an embodiment;

(4) FIG. 3 shows two pulling rollers mutually displaced with mounted devices for counteracting winding up of film or web material in accordance with an embodiment;

(5) FIG. 4 shows an enlarged portion of the embodiment depicted in FIG. 3;

(6) FIG. 5 shows a top view of a device for counteracting winding up of film or web material in an embodiment in accordance with an embodiment; and

(7) FIG. 6 shows a bottom perspective view of a device for counteracting winding up of film or web material in accordance with an embodiment.

(8) In the explanation of the Figures, identical or corresponding elements will be provided with the same designations in different Figures. Therefore, no explanation of all details may be given in connection with each single Figure/embodiment.

LIST OF REFERENCES

(9) 1 apparatus 2 web material 3 web 4 pulling roller 5 direction of conveying, web material 6 reversing roller 7 folding box 8 advancing roller/sealing roller 9 direction of rotation, pulling roller 10 device 11 adjusting member 12 spring element 13 fastening element 14 directions of rotation, adjusting member 15 recess 16 leaf spring 17 centre axis, pulling roller 18 friction material

DETAILED DESCRIPTION

(10) FIG. 1 shows an example of an embodiment of an apparatus 1 for packing, where web material 2 is conveyed in several juxtaposed webs 3.

(11) FIG. 2 shows a path of the web material 2 past a pulling roller 4, where the web material 2 has a conveying direction 5, where the web material 2 first passes a reversing roller 6 and then a pulling roller 4, before the web material 2 passes a folding box 7 on the way of the web material 2 in direction of an advancing roller/sealing roller 8.

(12) The used pulling roller or rollers 4 may be driven by means of frequency-controlled gear motors (not shown). The speed of a pulling roller 4 is adjusted by a control panel and may beset to the same speed as the packing speed in mm/s and adapted to follow the production speed.

(13) FIG. 2 also shows that the pulling roller 4 has a direction of rotation 9 and that a device 10 is disposed relatively in relation to the pulling roller 4, extending at least partially around the pulling roller 4. It appears also in FIG. 2 that the device 10, which extends at least partly around the pulling roller 4, is also fastened to an adjustment member 11 which is disposed relatively to the pulling roller 4 as well.

(14) Based on FIG. 2 embodiments of the invention and its operation can easily be explained in that the web material 2 stops its movement in the conveying direction 5 when no advancing occurs by the advancing roller 8. This means that the web material 2 is without any tension, and the device 10 will thereby push the web material 2 away from the pulling roller 4 and winding up of web material 2 around the pulling roller 4 is thereby avoided. When the advancing roller 8 starts again, the web material 2 is again tensioned against the pulling roller 4, and the device 10 will also be pressed against the pulling roller 4.

(15) FIGS. 3 and 4 show basically the same, though FIG. 4 in more detail, but the Figures show two pulling rollers 4 mutually displaced with devices 10 mounted for counteracting the winding up of web material 2. The reason for two pulling rollers 4 is due to the fact that the webs 3 (see FIG. 1) on the apparatus 1 in question lie so close that the web materials 2 cannot lie side by side on one pulling roller 4 only, and the web materials 2 therefore lie offset such that the web material 2 of the one web of the webs 3 lies on one pulling roller 4 and the web material 2 of the other web of the webs 3 lies on the other pulling roller 4. Every web material 2 thus only passes one of the shown two pulling rollers 4. Each pulling roller 4 has friction material 18 on at least part of the surface that comes into contact with the web material 2 in order to achieve control of the web material 2, where the friction material 18 may be a number of O-rings, or e.g. a piece of silicon tubing.

(16) The Figures show that the device 10 in the embodiment shown here includes two spring elements 12 for each web 3, and where the spring elements 12 extend at least partially around the pulling roller 4, where it also appears that the device 10 is disposed directly on a fastening element 13 and thus indirectly on an adjusting member 11 disposed relatively in relation to the pulling roller 4.

(17) This means that when the web material 2 is without any tension, the spring elements 12 of the device will push the web material 2 away from friction material 18 on the pulling roller 4 and winding up of web material 2 around the pulling roller 4 is thereby avoided. When the advancing roller 8 starts again, the web material 2 is again tensioned against the pulling roller 4 and the spring elements 12 of the device will also be pressed against the pulling roller 4, whereby the spring elements 12 of the device will also prevent the web material 2 from coming in under or between the pulling roller 4 and the fastening element 13.

(18) It also appears on FIGS. 1 and 4 that the adjusting member 11 has clockwise and counter clockwise directions of rotation 14, whereby adjustment of the spring tension of the spring elements 12 is possible. It also appears on these Figures that the spring elements 12 interact with recesses 15 in the pulling roller 4.

(19) FIGS. 3 and 4 also show that the spring elements 12 are disposed substantially symmetrically relative to the conveyed web material 2 (see FIG. 1) and that the spring element 12 is a leaf spring 16.

(20) FIG. 5 shows that a device 10 for counteracting winding up of film or web material in an embodiment seen from above, on which it also appears that the spring elements 12 of the device is disposed relatively in relation to the pulling roller 4 and extending at least partly around the pulling roller 4. It is also seen that the spring elements 12 are configured to interact with recesses 15 in the pulling roller 4 and that the spring elements 12 are disposed substantially symmetrically in relation to the conveyed web material 2 (see FIG. 1).

(21) FIG. 6 shows a device 10 for counteracting winding up of film or web material in an embodiment seen from below, on which it appears that the spring elements 12 of the device extend at least partly around the pulling roller 4.

(22) Although the present invention has been disclosed in the form of preferred embodiments and variations thereon, it will be understood that numerous additional modifications and variations could be made thereto without departing from the scope of the invention.

(23) For the sake of clarity, it is to be understood that the use of “a” or “an” throughout this application does not exclude a plurality, and “comprising” does not exclude other steps or elements. The mention of a “unit” or a “module” does not preclude the use of more than one unit or module.