Abstract
A mouth-nose mask for reducing the transmission of pathogens via droplets of secretion is disclosed. The mouth-nose mask includes a central fold which defines a chin-nose line of the mouth-nose mask and separates the mouth-nose mask into two substantially congruent halves. A fastening means for fastening the mouth-nose mask to a wearer's ears or back of the head is attached to the ends of the two halves remote from the central fold. The mouth-nose mask includes at least two superposed layers of a filter material, the at least two layers defining the outer shape of the mouth-nose mask and being only partially joined to one another at their edges.
Claims
1. A mouth-nose protection for reducing the transmission of pathogens by secretion droplets, the mouth nose protection comprising: a central folds defining a chin-nose line of the mouth-nose protection and configured to divide the mouth-nose protection into two substantially congruent halves; hand fastening means configured to fasten the mouth-nose protection to ears of a wearer or to a back of a head of the wearer, the fastening means further configured to attach to the ends of the two substantially congruent halves facing away from the central fold; and at least two superimposed layers of a filter material defining an outer shape of the mouth-nose protection and arranged only partially connected at their edges.
2. The mouth-nose protection according to claim 1, wherein the partial connection is a materially bonded connection and the at least two superimposed layers of the filter material are arranged substantially congruent.
3. (canceled)
4. The mouth-nose protection according to claim 1, wherein the at least two layers are connected to each other on less than 50%, of the total length of their edges and the upper edges of the two halves, which extend from the uppermost region of the central fold to the free ends of the two halves, the at least two layers of the filter material are not connected to one another.
5. (canceled)
6. (canceled)
7. (canceled)
8. (canceled)
9. (canceled)
10. The mouth-nose protection according to claim 1, wherein the at least two layers of the filter material are connected to each other exclusively in the region of the central fold and in the regions of the free ends of the two halves.
11. The mouth-nose protection according to claim 1, wherein the central fold comprises a lower portion, a middle portion and an upper portion, the lower portion and the upper portion running at an angle of 10-80 to the middle portion.
12. (canceled)
13. (canceled)
14. (canceled)
15. (canceled)
16. (canceled)
17. The mouth-nose protection according to claim 1, further comprising a structuring arranged in an uppermost section of the central fold at the free edge, the structuring comprising one or more projections projecting at least one of forwards and upwards and a plurality of spaced rectangular projections.
18. (canceled)
19. (canceled)
20. (canceled)
21. (canceled)
22. (canceled)
23. The mouth-nose protection according to claim 1, further comprising a cushioning element attached to each of the upper edges of the two halves on the inside of the mouth-nose protection, wherein the cushioning elements are trapezoidal prisms.
24. (canceled)
25. The mouth-nose protection according to claim 1, further comprising one or more color markings arranged on the fastening means.
26. The mouth-nose protection according to claim 25, further comprising at least one stopper configured to be displaced and positioned along the color marking(s).
27. The mouth-nose protection according to claim 1, wherein the fastening means further comprises an elastic material loop attached to each of the two ends facing away from the central fold.
28. The mouth-nose protection according to claim 27, further comprising one or more markings arranged on each of the two loops and comprising different colors.
29. The mouth-nose protection according to claim 1, further comprising at least one fixing element configured such that the two congruent halves can be held together at the ends facing away from the central fold when not in use, wherein the at least one fixing element comprises at least two magnets, one magnet on each of the ends of the two congruent halves of the mouth-nose protection facing away from the central fold being attached to the mouth-nose protection.
30. (canceled)
31. (canceled)
32. The mouth-nose protection according to claim 1, wherein: the central fold comprises a projecting gripping element for gripping the mouth-nose protection with two fingers; and the gripping element is arranged to protrude in a direction away from the face of the wearer when the mount-nose protection is worn by the wearer.
33. (canceled)
34. The mouth-nose protection according to claim 32, wherein a free end of the gripping element facing away from the central fold is configured to be at least one of thicker, at least in sections, than a region facing the central fold and a curved edge.
35. (canceled)
36. (canceled)
37. (canceled)
38. The mouth-nose protection according to claim 32, wherein the gripping element: comprises filter material, is formed integrally with the at least two superimposed layers of the filter material; and wherein a region of the gripping element facing the central fold comprises a materially bonded connection of filter material; and wherein in the free end of tie gripping element facing away from the central fold, the filter material is not materially bonded.
39. (canceled)
40. (canceled)
41. The mouth-nose protection according to claim 1, wherein the mouth-nose protection is sealed in a plastic foil.
42. (canceled)
43. A method of producing a mouth-nose protection, the method comprising the steps of: providing a one-piece first layer of a filter material having an axisymmetric shape and a substantially congruent one-piece second layer of a filter material; arranging the one-piece first layer and one-piece second layer one above the other; folding of the one-piece first layer and one-piece second layer along an axis of symmetry so as to create a central fold; partial joining the one-piece first layer and one-piece second layer at their edges; and attaching one means of securing the mouth-nose protection to the ears or to the back of the head of a wearer at each end of the two halves facing away from the central fold.
44. (canceled)
45. The method of producing a mouth-nose protection according to claim 43, the method, comprising the steps of: a) providing a first half of a first layer of a filter material and a second half of the first layer; b) providing a first half of a second layer of a filter material and a second half of the second layer, wherein the first half of the second layer and the second half of the second layer are substantially congruent with the first half of the first layer and the second half of the first layer; c) superimposing the first half of the first layer and the first half of the second layer and the second half of the first layer and the second half of the second layer; d) partially joining layers in an edge region of an intended chin-nose line of the mouth-nose protection with formation of a central fold; e) attaching a means each for fastening the mouth-nose protection to the ears or to the back of the head of a wearer at the ends of the two halves facing away from the central fold.
46. (canceled)
Description
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0124] Further advantages, features, and details of the various embodiments of this disclosure will become apparent from the ensuring description of a preferred exemplary embodiment and with the aid of the drawings. The features and combinations of features recited below in the description, as well as the features and feature combination shown after that in the drawing description or in the drawings alone, may be used not only in the particular combination received, but also in other combinations on their own, without departing from the scope of the disclosure.
[0125] The drawings used to explain the embodiment show:
[0126] FIG. 1a first mouth-nose protection according to the invention in a top view from the left side;
[0127] FIG. 2 the mouth-nose protection of FIG. 1 viewed from above;
[0128] FIG. 3 the mouth-nose protection shown in FIGS. 1 and 2 in the wearing position on the head of a wearer (the mouth-nose protection is shown transparent for better illustration);
[0129] FIG. 4a second mouth-nose protection according to the invention with an only partially welded central fold in a top view on the left side;
[0130] FIG. 5a third mouth-nose protection according to the invention, which in a partial section of the upper edge has a convexly curved projection as a sealing lip;
[0131] FIG. 6a fourth mouth-nose protection according to the invention, which has an additional concave curved recess in a partial section of the upper rim;
[0132] FIG. 7 on the left side, the individual layers of filter material which are provided for producing the mouth-nose protection from FIGS. 1-3 and are welded at the left edge areas to form a central fold. On the right side of FIG. 7 the further components are shown;
[0133] FIG. 8a layer of filter material consisting of two congruent halves, as used for producing the mouth-nose protection of FIG. 4;
[0134] FIG. 9 the mouth-nose protection from FIGS. 1-3 in folded condition;
[0135] FIG. 10 the mouth-nose protection from FIGS. 1-3 in folded condition in a plastic foil in vacuum-sealed condition;
[0136] FIG. 11 a top view from the left side of another mouth-nose protection, which is constructed like the mouth-nose protection from FIGS. 1-3, but in contrast to the latter has a two-part central fold;
[0137] FIG. 12 a top view from the left side of a mouth-nose protection, which has a structuring at the upper section of the central fold in the form of several sawtooth-shaped projections projecting upwards to the front;
[0138] FIG. 13 a top view of a mouth-nose protection with a connecting element in the form of a fabric thread connecting the two substantially congruent halves;
[0139] FIG. 14 the mouth-nose protection of FIG. 13 in the wearing position on the head of a wearer (the mouth-nose protection is shown transparent for better illustration) with the connecting element running between the nose and the upper lip;
[0140] FIG. 15 another mouth-nose protection in a top view from the left side, the mouth-nose protection being essentially identical in construction to the mouth-nose protection of FIG. 5, but instead of the convexly curved projection it has four rectangular projections which lie adjacent to one another and are folded onto the inner side;
[0141] FIG. 16 the inner layer of filter material used for producing the left half of the mouth-nose protection of FIG. 15 in a top view;
[0142] FIG. 17 a variant of the mouth-nose protection FIG. 4 in a top view from the left;
[0143] FIG. 18 a mouth-nose protection with additional cushioning elements viewed from the top side;
[0144] FIG. 19 a mouth-nose protection in a top view from the left side, which is symmetrical with respect to its longitudinal axis;
[0145] FIG. 20 a side view of another mouth-nose protection which has structuring in the form of several upwardly projecting rounded rectangular projections in an upper section of the central fold, as well as scales and color markings on the fastening loops;
[0146] FIG. 21 the mouth-nose protection shown in FIG. 20, viewed from above. The scale on the left side of the fastening loop and the color marking at the end of the loop have a different color (e.g. red) than the scale on the right side of the fastening loop and the color marking at the end of the loop (e.g. green);
[0147] FIG. 22 a detailed view of the structuring on the upper section of the central fold of the mouth-nose protection of FIG. 20;
[0148] FIG. 23 a layer of filter material consisting of two congruent halves with trapezoidal prismatic cushioning elements at the upper edges;
[0149] FIG. 24 the layer from FIG. 23 viewed from the lower side in FIG. 23;
[0150] FIG. 25 a mouth-nose protection based on two layers of the filter material shown in FIGS. 23 and 24 viewed from above;
[0151] FIG. 26 a further mouth-nose protection in which magnets are attached to the rear free ends, which enable the mouth-nose protection to be folded together in a defined manner;
[0152] FIG. 27 a side view of the mouth-nose protection of FIG. 26;
[0153] FIG. 28 another mouth-nose protection with a gripping element at the central fold;
[0154] FIG. 29 a side view of the mouth-nose protection of FIG. 28;
[0155] FIG. 30 a detailed view of the area of the mouth-nose protection marked with a circle from FIG. 29.
[0156] In principle, the same parts are provided with the same reference signs in the figures.
DETAILED DESCRIPTON OF THE INVENTION
[0157] As used throughout the present disclosure, unless specifically stated otherwise, the term or encompasses all possible combinations, except where infeasible. For example, the expression A or B shall mean A alone, B alone, or A and B together. If it is stated that a component includes A, B or C, then, unless specifically stated otherwise or infeasible, the component may include A, or B, or C, or A and B, or A and C, or B and C, or A and B and C. Expressions such as at least one of do not necessarily modify an entirety of the following list and do not necessarily modify each member of the list, such that at least one of A, B, and C should not be understood as including only one of A, only one of B, only one of C, or any combination of A, B, and C.
[0158] FIG. 1 shows a first mouth-nose protection 10 according to the invention viewed from the left side, while FIG. 2 shows the same mouth-nose protection 10 viewed from the top. The left half of the mouth-nose protection 10 comprises two superimposed layers 12.1, 12.2 of a filter material. The right half of the mouth-nose protection 10 is congruent with the left half and also consists of two superimposed layers 13.1, 13.2 of the same filter material. The layers 12.1, 12.2, 13.1, 13.2 of the filter material define the outer shape of the mouth-nose protection
[0159] The layers 12.1, 12.2, 13.1, 13.2 of the filter material are all congruent (see also FIG. 7) and are welded together in the area of a central fold 11. The central fold 11 forms a chin-nose line of the mouth-nose protection 10 and has a lower section 11a, a middle section 11b and an upper section 11c, which each run in a straight line and are unwound from one another. A spherical projection is provided at the upper end of the upper section 11c as a tactile marker. The lower and upper sections 11a, 11c are also coated with a phosphorescent paint.
[0160] The upper edge 12a of the left half and the upper edge 13a of the right side of the mouth-nose protection 10 run concavely curved to the rear free ends 12c, 13c of the two halves. In contrast, the lower edges 12b, 13b run in a straight line.
[0161] At the rear free end 12c of the upper edge 12a and at the rear free end 12d of the lower edge 12b, the two layers 12.1, 12.2 are welded to each other at the edge region of the filter material. Likewise, at the rear free end 13c of the upper edge 13a and at the rear free end 13d of the lower edge 13b, the two layers 13.1, 13.2 are welded to each other at the edge area of the filter material.
[0162] Between the central fold 11 and the rear free ends 12c, 12d, 13c, 13d, the two layers 12.1, 12.2 or 13.1, 13.2 are not joined together.
[0163] Further welded to the rear free ends 12c, 12d of the left half is a first loop 15.1 of elastic material which serves as a means for securing the mouth-nose protection 10 to the ears or back of the head of a wearer. On the right side, a corresponding second loop 15.2 is attached A spherical magnet 16 is also attached to the first loop 15.1, which serves as a magnetic retaining element with which the mouth-nose protection 10 can be attached to a metallic object when not in use.
[0164] Further, the mouth-nose protection 10 has an additional fold 14.1, 14.2 in each of the left and right halves, the two additional folds 14.1, 14.2 being substantially parallel to the central portion 11b of the central fold 11. The folds 14.1, 14.2 serve as defined folding points for folding the mouth-nose protection 10 (see also FIGS. 9 and 10) and can be introduced, for example, by ironing at elevated temperatures.
[0165] The filter material of the mouth-nose protection 10 consists, for example, of a HEPA filter material based on synthetic fibers, as used in vacuum cleaners. The two layers of the filter material together comprise a permeability for particles up to a size of 0.6 m, measured according to EN 149:2001+A1:2009, of at most 1%.
[0166] FIG. 3 shows the mouth-nose protection 10 in the wearing position on the head K of a wearer (the mouth-nose protection is shown transparent for better illustration). As can be seen from FIG. 3, the lower section 11a of the central fold embraces the chin portion of the wearer, while the upper section 11c embraces the nose portion. The central section 11b lies in front of the mouth area of the wearer.
[0167] FIG. 4 shows a second mouth-nose protection 20 according to the invention in a top left view. The second mouth-nose protection 20 consists of two one-piece layers of a filter material with a left half 22.1 and a right half 23.1 (not visible in FIG. 4), which are loosely folded around each other in the middle section 21b of the central fold 21 (see also FIG. 8). At the lower and upper sections 21a, 21c, the two layers 22.1, 22.2 are welded together. The remaining structure of the mouth-nose protection 20 is substantially identical in construction to the mouth-nose protection 10 of FIGS. 1-3.
[0168] FIG. 5 shows a third mouth-nose protection 30 according to the invention, which is constructed like the mouth-nose protection 10 of FIG. 1, but additionally has a convexly curved projection 39 at the upper and concavely curved edge 32a of the left half in a partial section. A corresponding convexly curved projection is also found on the upper edge of the right half (not visible in FIG. 5). The projection 39 acts as a sealing lip which reduces the unwanted intake and/or outflow of breathable air at the transition of the nose to the cheek regions of the wearer.
[0169] FIG. 6 shows a fourth mouth-nose protection 40 according to the invention, which is constructed like the mouth-nose protection 10 of FIG. 1, but additionally has an additional concavely curved recess 49 at the upper and concavely curved edge 42a of the left half in a partial section. A corresponding concavely curved recess is also found at the upper edge of the right half (not visible in FIG. 6). The concave curved recess 49 improved the it of the mouth-nose protection 40 in the nose-cheek area, which also improves the tightness.
[0170] FIG. 7 shows on the left side the layers 12.1, 12.2, 13.1, 13.2 of filter material, which are provided for producing the mouth-nose protection 10 of FIGS. 1-3 and are welded at the left edge areas to the central fold 11. On the right in FIG. 7 are shown the loops 15.1, 15.2 as well as the spherical magnet 16, which are welded in at the rear free ends or in FIG. 7 at the right free ends of the layers 12.1, 12.2, 13.1, 13.2.
[0171] FIG. 8 shows a layer of filter material consisting of two congruent halves 22.1, 23.1 as used for producing the mouth-nose protection 20 of FIG. 4. Two of the layers shown in FIG. 8 are placed one on top of the other, folded about the central axis of symmetry 21b and welded together with the loops (not shown in FIG. 8) at the adjoining sections 21a, 21c as well as at the free ends.
[0172] FIG. 9 shows the mouth-nose protection 10 from FIGS. 1-3 in folded condition. The two halves of the folded mouth-nose protection 10 lie on top of each other and the areas of the halves lying behind the additional folds 14.1, 14.2 are folded in a superimposed arrangement onto the areas lying in front of the additional folds 14.1, 14.2. The two loops 15.1, are also folded back to obtain the most space-saving arrangement possible. In the arrangement shown in FIG. 9, the mouth-nose protection 10 can be stored in a space-saving manner, for example, in a trouser pocket, with the inner regions of the mouth-nose protection being well protected from external influences.
[0173] FIG. 10 shows the mouth-nose protection 10 from FIGS. 1-3 in a folded state in a plastic foil V in a vacuum-sealed state. In this case, the loops 15.1, 15.2 are adjacent to the folded layers of the filter material so that no unwanted impressions or pressure points are formed in the filter material. In this state, the mouth-nose protection can be transported, stored, or kept before initial use.
[0174] FIG. 11 shows a further mouth-nose protection 100, which is constructed like the mouth-nose protection 10 of FIGS. 1-3, but in contrast thereto has a two-part central fold 111, which comprises a lower section 111a and an upper section 111b, each of which runs in a straight line and is unwound from one another. Thus, the central fold 111 with the upper section 111b can encompass the area of the tip of the nose of the wearer, while the lower section 111a covers the mouth and chin area of the wearer without encompassing the chin.
[0175] FIG. 12 shows another mouth-nose protection 200, which is substantially identical in construction to the mouth-nose protection 10 of FIGS. 1-3. Like the mouth-nose protection 100, the mouth-nose protection 200 has a central fold 211 with a lower section 211a, a middle section 211b and an upper section 211c. However, unlike the upper section 11c of the mouth-nose protection 10 of FIG. 1, the upper section 211c of the mouth-nose protection 200 has structuring 217 at the upper free edge in the form of a plurality of sawtooth-shaped projections projecting upwardly toward the front. This allows the nose area of the mouth-nose protection 200 to be easily felt, and if the wearer of the mouth-nose protection is wearing eyeglasses, slippage along the nose edge can be prevented.
[0176] FIG. 13 shows another mouth-nose protection 300, which is constructed substantially like the mouth-nose protection 10 of FIGS. 1-3, but additionally comprises a connecting element 350 in the form of a fabric thread. The connecting element 350 connects the two substantially congruent halves or the two left layers 312.1, 312.2 and the two right layers 313.1, 313.2 of the mouth-nose protection 300. The connecting element 350 extends at a distance from the central fold 311 and the upper edges 312a, 313a substantially horizontally from one half to the other. This is so that the connecting element 350 extends between the upper lip 0 and the lower nose edge N of a wearer when the mouth-nose protection 300 is used as intended, which is shown in FIG. 14.
[0177] FIG. 15 shows another mouth-nose protection 400 which is substantially identical in construction to the mouth-nose protection 30 of FIG. 5. However, instead of the convex curved projection 39, the mouth-nose protection 400 has four adjacent rectangular projections 439.1, 439.2, 439.3, 439.4 which are attached to the upper and concave curved edge 412a and are folded to rest side by side on the inside of the left half of the mouth-nose protection 400. Corresponding projections are provided on the right half (not shown in FIG. 15).
[0178] In FIG. 16, the inner layer 412.2 of filter material used for producing the left half of the mouth-nose protection 400 of FIG. 15 is shown. The rectangular projections 439.1, 439.2, 439.3, 439.4 are integral parts of the filter material and are folded around the dashed line so that they come to rest on the inside of the finished mouth-nose protection 400. The outer layer of the left half of the mouth-nose protection 400 may be formed like the outer layer 12.1 of the mouth-nose protection 10, which is shown in FIG. 7. The right half of the mouth-nose protection 400 is designed accordingly.
[0179] FIG. 17 shows another mouth-nose protection 500, which is a variant of the mouth-nose protection 20 of FIG. 4, in a top view from the left side. The mouth-nose protection 500 consists of two one-piece layers which are folded around each other in the lower section 521a of the central fold 521. At the central and upper sections 521b, 521c, the two layers are welded together. The inner layer of filter material also has a latex coating 550 applied to its inner side in the area of the upper 521c fold as an anti-slip coating. This comes to rest on the lower portion of the bridge of the wearer's nose when the mouth-nose protection 500 is in use. The remainder of the construction of the mouth-nose protection 500 is substantially identical in construction to the mouth-nose protection 20 of FIG. 4.
[0180] FIG. 18 shows another mouth-nose protection 600, which is a variant of the mouth-nose protection 10 of FIGS. 1-3, viewed from the top. A cushioning element 660.1, 660.2 is attached to each of the upper edges 612a, 613a of the two halves on the inside of the mouth-nose protection 600. The cushioning elements 660.1, 660.2 are made of foam and comprise the shape of a parallelepiped. They are each attached between the central fold 611 and the additional folds 614.1, 614.2. In other words, the front ends of the cushioning elements 660.1, 660.2 are spaced from the central fold 611 and the rear ends are located in front of the additional folds 614.1, 614.2. The front ends of the cushioning elements 660.1, 660.2 are tapered in a wedge shape and their front end faces are inclined towards the rear. This creates continuous transitions in the nose area and in the cheek area. The remaining structure of the mouth-nose protection 600 is substantially identical in construction to the mouth-nose protection 10 of FIGS. 1-3.
[0181] FIG. 19 shows another mouth-nose protection 700 in a top view from the left side. The mouth-nose protection 700 is symmetrical with respect to an axis of symmetry 701, which extends from the central region of the central fold 711 to the central region of the rear end 780 of the mouth-nose protection 700. Accordingly, the central fold 711 is also symmetrical with respect to the axis of symmetry 701. The left half and the right half of the mouth-nose protection 700 shown behind are identical in construction. Like the mouth-nose protection 10 from FIGS. 1-3, the mouth-nose protection 700 also has a total of four layers of filter material (2 per half), which are continuously welded in the region of the central fold 711. Furthermore, the mouth-nose protection 700 has a clamping stopper 716 on the loop 715.1 made of elastic material, with which the size of the loop 715.1 can be changed.
[0182] FIG. 20 shows a side view of another mouth-nose protection 800, which is substantially identical in construction to the mouth-nose protection 200 of FIG. 12. Like the mouth-nose protection 200, the mouth-nose protection 800 has a central fold 811 with a lower section 811a, a middle section 811b and an upper section 811c. At the upper section 811c, the mouth-nose protection of FIG. 20 has structuring 817 in the form of a plurality of upwardly projecting rounded rectangular projections. FIG. 21 shows the mouth-nose protection 800 as viewed from the top.
[0183] FIG. 22 shows a detailed view of the structuring 817. In contrast to the projections of the embodiment in FIG. 12, the projections in the mouth-nose protection 800 do not taper to a point, but end in a convexly shaped upper edge. This makes the individual projections more pleasant to feel and there is less risk of persons injuring themselves on pointed projections.
[0184] Another special feature of the mouth-nose protection 800 are the loops 815.1, 815.2 welded in at the rear free ends and made of elastic material, which serve as a means of fastening the mouth-nose protection 800 to the ears or the back of the head of a wearer.
[0185] The left loop 815.1 has a scale 815.1a consisting of regularly spaced red color markings. The scale 815.1a allows the clamp stopper 816.1 to be positioned at a predetermined location. This allows the user to easily set the width of the left loop 815.1 that suits him. At the rearmost end of the left loop 815.1 there is also a further red marking 815.1b, which is clearly visible when viewed from the rear of the mouth-nose protection 800.
[0186] Likewise, the right loop 815.2 has a scale 815.2a consisting of regularly applied green color markings. The scale 815.2a allows the second clamp stopper 816.2 to also be positioned at a predetermined point in order to adjust the width of the right loop 815.2. At the rearmost end of the right loop 815.2, another green marking 815.2b is also provided.
[0187] Due to the different coloring of the scales 815.1a, 815.2a, the user can detect the left and the right side of the mouth-nose protection 800 in a simple and reliable way. Due to the two differently colored additional markings 815.1b, 815.2b at the rearmost ends of the loop, this is also possible when the user looks at the mouth-nose protection 800 from the rear side.
[0188] FIG. 23 shows a layer of filter material consisting of two congruent halves 22.1, 23.1, as it can be used instead of the layer of FIG. 8, in a view from above.
[0189] Compared with the layer in FIG. 8, the layer in FIG. 23 additionally has a substantially trapezoidal prismatic cushioning element 60.1, 60.2 on the inside of each of the upper edges 12a, 13a of the two halves 22.1, 23.1, which is molded onto the upper edge 12a, 13a in each case. The cushioning elements 60.1, 60.2 are adhesively bonded with their trapezoidal bases to the two halves 22.1, 23.1 so that the longest side of the trapezoidal base runs along the respective upper edge 12a, 13a. FIG. 24 shows the layer from FIG. 23 viewed from the lower side in FIG. 23.
[0190] For producing a mouth-nose protection 20 as shown in FIG. 25, two of the layers shown in FIG. 23 are laid one on top of the other, folded around the central axis of symmetry 21b and welded together with loops at the adjoining sections 21a, 21c and at the free ends.
[0191] The trapezoidal prismatic cushioning elements 60.1, 60.2 thereby provide continuous flexibility transitions in one direction along the upper edges 12a, 13a, which in turn contributes to a better seal in the nose and cheek area.
[0192] FIG. 26 shows a variant of the mouth-nose protection of FIG. 2 from above. FIG. 27 shows the mouth-nose protection of FIG. 26 viewed from the left side. The elements of the mouth-nose protection 900, which correspond to the elements of the mouth-nose protection of FIG. 2, have the same numbers except for the digit 9 in front.
[0193] The mouth-nose protection 900 of FIGS. 26 and 27 has a magnet 918.1c, 918.1d, 918.2c, 918.2d as a fixing element at each of the rear free ends 912c, 912d, 913c, 913d. Opposite magnets 918.1c, 918.2c and 918.1d, 918.2d are selected in such a way that they attract each other magnetically when placed on top of each other. This allows the mouth-nose protection 900 to be folded in a well-defined and predetermined state and stowed, for example, in a trouser or jacket pocket without the mouth-nose protection 900 becoming crumpled.
[0194] FIG. 28 shows a top view of a variant of the mouth-nose protection of FIGS. 26 and 27. FIG. 29 shows the mouth-nose protection of FIG. 28 viewed from the left side. The elements of the mouth-nose protection 900, which correspond to the elements of the mouth-nose protection from FIGS. 26 and 27, have the same numbers, but additionally have an apostrophe (').
[0195] The mouth-nose protection 900 of FIGS. 28 and 29 has gripping element 911d projecting away to the left in the central section 911b of the central fold 911. In FIG. 28, it can be seen that the free end of the gripping element 911d facing away from the central fold 911b is designed as a curved edge.
[0196] FIG. 30 shows the area marked with a circle in FIG. 29 with the gripping element 911d in detail. The gripping element is formed integrally with the filter layers 912.1, 912.2, 913.1, 913.2. At its free end 911d.2 facing away from the central fold 911b, the gripping element 911d is thicker than in the region 911.1 facing the central fold 911b. In the area 911.1, the filter layers are welded together, while there is no materially bonded connection at the free end 911d.2.
[0197] Measured in the direction of the middle section 911b, the gripping element 911d has a length of, for example, about 15 mm at the longest point or in the region of the transition to the fold 911b and a thickness of, for example, about 0.8 mm in the region of the free end 911d.2.
[0198] The embodiments shown above are to be understood merely as illustrative examples which can be modified as desired within the scope of the invention.
[0199] For example, it is possible to provide differently designed central folds 11, 21, which comprise, for example, curved sections.
[0200] Likewise, the mouth-nose protections 10, 20, 30, 40 can be produced with differently configured edges, for example differently curved edges. For example, the lower edges of the mouth-nose protection 10, 20, 30, 40 can be curved concavely upward.
[0201] Likewise, more than two layers can be combined, for example, to increase filtering performance. It is also possible to provide additional layers without filtering effect, for example decorative layers on the outside of the mouth-nose protection or layers for cushioning on the inside of the mouth-nose protection to improve comfort.
[0202] Furthermore, on all mouth-nose protectors, clamp stoppers 716 or similar devices can be attached to the elastic loops. Likewise, gripping elements such as those shown in FIGS. 28-30 can be attached to all mouth-nose protection.
[0203] In summary, advantageous mouth-nose protection has been provided, which is characterized in particular by high effectiveness, good wearing comfort and ease of manufacture.
