DE102020129752A1 - Protective mask and method of manufacturing a protective mask - Google Patents

Abstract

The subject matter of the invention is a method for producing a protective mask (1) for covering a person's mouth and/or nose, with the following steps: Insertion of at least one resilient tab (7) with at least three resilient parts (10, 11) including two outer ones Parts (10) and a middle part (11) in a clamping element (2) made of a flat material,Introducing at least one head fastening strap (6) for fastening the protective mask (1) to the person's head under all parts of the flap (7), so that the head fastening strap (6) can be clamped to the clamping element (2) by the spring force of the outer parts (10) of the tab (7),connecting the middle part to the clamping element (2) in order to secure the head fastening strap (6) by the connected middle slidably fixing part (11) to the clamping element (2), and applying the clamping element (2) to a filter element (3) for covering the mouth and/or nose part of the person to obtain the protective mask (1).

Description

technical field

The invention relates to a protective mask with a filter element for covering a part of the mouth and/or nose of a person, at least one head fastening strap for fastening the protective mask to the person's head, and at least one clamping element fastened to the filter element. Furthermore, the invention relates to a method for producing a protective mask with a filter element for covering a part of the mouth and/or nose of a person, and at least one head fastening strap for fastening the protective mask to the person's head.

Background of the Invention

Protective masks are used to protect the face or parts of it and the respiratory organs. As filter masks or fresh air masks, protective masks protect against gases, vapours, liquid mist, coarse and respirable fine dust, pathogens, viruses and/or annoying odours. Masks are differentiated, for example, in everyday masks, so-called makeshift masks made of fabric or community masks, as medical mouth and nose protection, MNS, for example according to EN 14683, filtering masks, for example according to EN 149, FFPI mask, FFP2 mask, N95 mask , or FFP3 mask. The aforementioned FFP masks are usually used as part of personal protective equipment as part of occupational safety in areas where there are harmful substances in the air.

The aforementioned protective masks are usually attached to the head with a strap, which is guided either behind the ears or behind the head. Higher quality masks have two flexible head attachment straps. While with simpler masks the straps are elastically welded to the protective mask or fastened with metal clamps, with high-quality masks they can also be designed to be adjustable or openable. Basically, in order to achieve a sufficient filtering effect, it is important that the protective mask can be attached to the head easily and in a defined and sealing manner. Protective masks, the position of which on the head can be adjusted particularly well and easily, require adjustment and positioning components for this purpose and can often only be produced in a complex and costly manner in a multi-stage production process.

Description of the invention

Proceeding from this situation, it is an object of the present invention to specify a protective mask and a method for producing a protective mask, which protective mask can be attached to the head more easily and conveniently while being inexpensive to manufacture.

The object of the invention is solved by the features of the independent claims. Advantageous configurations are specified in the dependent claims.

• Einbringen wenigstens einer federnden Lasche mit wenigstens drei federnden Teilen einschließlich zweier äußerer Teile und eines mittleren Teils in ein Klemmelement aus einem Flachmaterial,
• Einbringen wenigstens eines Kopfbefestigungsbands zum Befestigen der Schutzmaske an dem Kopf der Person unter alle Teile der Lasche, so dass durch die Federkraft der äußeren Teile der Lasche das Kopfbefestigungsband an das Klemmelement klemmbar ist,
• Verbinden des mittleren Teils mit dem Klemmelement, um das Kopfbefestigungsband durch den verbundenen Teil verschiebbar an dem Klemmelement zu fixieren, und
• Aufbringen des Klemmelements auf ein Filterelement zum Bedecken der Mund- und/oder Nasenpartie der Person zum Erhalten der Schutzmaske..

Accordingly, the object is achieved by a method for producing a protective mask for covering a person's mouth and/or nose area, with the steps:

• introducing at least one resilient tab with at least three resilient parts including two outer parts and a middle part into a clamping element made of a flat material,
• Insertion of at least one head-fastening strap for fastening the protective mask to the person's head under all parts of the strap, so that the head-fastening strap can be clamped to the clamping element by the spring force of the outer parts of the strap,
• connecting the central part to the clamping element to slidably fix the headgear strap to the clamping element through the connected part, and
• Applying the clamping element to a filter element to cover the person's mouth and/or nose area to obtain the protective mask.

An essential point of the invention is that the clamping element does not consist of a three-dimensionally designed and prefabricated part that is supplied during the production of the protective mask, as in the prior art, which is usually produced separately from plastic injection molding, but from the flat material , which can be supplied in the manufacture of the protective mask as meter goods or rolls and, in particular, can be punched out together with the filter element or, for example, cut by means of a laser. In other words, the proposed protective mask requires fewer and more cost-effective components and materials than protective masks known from the prior art, since the clamping element, as described later, can be manufactured together with the protective mask, in particular by stamping, and can preferably be made of the same material as the filter element . In this respect, the protection Masks can be produced fully automatically and faster with less energy consumption, since the clamping element can be fed into a production machine by rotating parts, does not have to be fed in by linear movements with changing directions and certainly does not have to be fed in manually. In other words, the proposed method allows so-called in-line production, in which case the head-fastening strap does not have to be fed through the clamping element in a complicated manner, for example manually. In contrast to the prior art, the fixing is carried out by the middle part of the clamping element, which, after the head fastening strap has been passed under it, is in turn connected to the clamping element, the head fastening strap being able to be clamped to the clamping element by the spring force of the outer parts of the strap.

The head fastening strap is preferably designed as a textile, rubber-like, elastic and/or flat strap, in particular as a flat strap. The filter element preferably has a design and/or extension based on the mouth and/or nose area, on the lateral transverse sides of which the head fastening strap can be provided and/or, when wearing the protective mask, can be oriented towards the ear. A head fastening strap and a corresponding clamping element are preferably provided on each transverse side. Two head fastening straps and two clamping elements correspondingly spaced apart are particularly preferably provided on each transverse side. Likewise, three or only one head attachment strap and clamping element can be provided. The head strap is not welded, glued, sewn and/or mechanically connected to the protective mask and/or the filter element. The strap, in particular the outer parts of the strap, preferably clamps the head fastening strap independently due to the spring force, the head fastening strap and thus the protective mask being able to be tightened by pulling on the head fastening strap. An opening is preferably provided in the filter element in the area of the clamping element and/or the tab.

More preferably, a single head fastening strap is provided on each side of the head and the strap is designed in three parts. The three parts are preferably of the same size and designed in a U-shape, with the lateral sides of the inserted parts forming a common contact line with the clamping element. Likewise, the parts can have different transverse widths, but preferably form a common contact line. For example, the outer parts can have the same transverse width and the middle part can have a larger transverse width. After inserting the head fastening strap, for example by inserting it under the parts that are folded up in relation to the clamping element and connecting the middle part, in particular at the contact line with the clamping element, the head fastening strap can be pulled away from the protective mask in the longitudinal direction in the area of the middle part, so that the head fastening strap has a lateral forms a loop. In this way the headgear strap can be clamped by the lateral sides of the outer parts at the line of contact against the clamping element.

To produce a plurality of protective masks, one filter element can be provided with clamping elements on both sides, and a running head fastening strap can be inserted and fixed in the respective clamping elements on both sides, as described above. The two head fastening straps can first be connected to one another between two protective masks, for example by welding, and then separated, so that the protective mask is provided on both sides with a head fastening strap connected in this way. Each headgear strap can then be pulled laterally longitudinally away from the protective mask as previously described to adjust the length of the headgear strap to the person's head.

The strap, in particular the outer parts and/or a transverse side of the strap facing the contact line, particularly preferably clamps the head fastening strap in such a way that the head fastening strap is clamped against unthreading backwards' towards the ear and/or the head fastening strap is clamped by pulling on the strap opposite the ear The end of the head fastening strap can be shortened 'to the front' through the tab 'back' on the head. The shackle is preferably prestressed with spring force in such a way that the shackle strives for a closed position in which the shackle rests flush against the clamping element. The clamping element preferably has a planar and/or rectangular extension. The head fastening strap is preferably routed behind the person's head and is connected at its ends to the filter element on opposite lateral transverse sides. More preferably, the headgear strap is not designed to attach to the person's ear. When the headgear strap is passed through, the tab opens outwards, preferably away from the face. The filter element is preferably of flat design or at least has a flat and/or flat design in the area of the clamping element. Furthermore, the filter element can have a flat or curved wing on its transverse side, on which the clamping element is provided.

The protective mask is preferably designed as a breathing mask, in particular designed as a half mask, preferably for use as a filtering mask (FFP), in particular for preventing preventing the inhalation of harmful particles and reducing infection with pathogens through the mouth and/or nose, and/or for use as an aerosol-filtering respiratory mask and/or filter particle mask, in particular, further in particular for preventing the transmission of pathogens by droplet infection and/or in particular for reducing a germ load, in particular a viral load, for example in the case of epidemic or pandemic spread of infectious diseases such as COVID-19. The protective mask is preferably designed as a particle-filtering half mask in accordance with EN 149:2001 or EN 149:2001+A1:2009, in particular an FFP-1, FFP-2 or FFP-3 mask. Furthermore, the mask can be designed according to EN standards 136, 140, 143, 149, 1827, 12941 and/or 12942.

The protective mask can have one or more layers of fabric as a filter element, which are in particular provided on top of one another and are preferably glued, connected and/or sewn to one another, which can comprise a woven fabric, knitted fabric, knitted fabric, embroidered fabric, scrim and/or a textile composite, in particular a fleece or woven fabric. The filter element can consist of textile fibers and/or have textile fibers, with natural fibers, preferably wool or cotton, and/or synthetic fibers, preferably synthetic fibers (man-made fibers) such as cellulosic fibers, for example viscose fibers, being used as textile fibers, in particular from Group of polyesters (PES), polyolefins such as polyethylene (PE) and polypropylene (PP), polyvinyl chloride (CLF), polyvinylidene chloride (CLF), acetate (CA), triacetate (CTA), polyacrylic (PAN), polyamide (PA), Polyvinyl alcohol (PVAL), polyurethanes, polyvinyl esters, (meth)acrylates and mixtures thereof. The aforementioned abbreviations for the textile fibers come from DIN 60001-4 (August 1991). The protective mask can contain further layers of fabric, for example as intermediate layers with different functions, for example for additional filtering, sealing, moisture absorption, etc.

The filter element can have a filtering effect and, for example, comprise a fleece or non-woven fabric, in particular a flexible, porous fabric that belongs to the textile composites, which is not made by classic methods of fabric binding of warp and weft or by stitch formation, but by intertwining and/or cohesive and/or adhesive connections made of textile fibers. Nonwovens are generally loose materials made from staple fibers or filaments, in particular from synthetic fibers or man-made fibers, for example polypropylene, polyester, viscose, etc., which are held together by the adhesion inherent in the fibers. Individual fibers can have a preferred direction, so-called oriented or cross-ply non-wovens, or they can also be non-directional, so-called random non-wovens. The average diameter of the textile fibers of the filter element is preferably at most 100 μm, in particular at most 30 μm, preferably at most 20 μm, preferably at most 10 μm, particularly preferably at most 5 μm, very particularly preferably at most 2 μm. In general, the diameter of the textile fibers of the filter element should be in the range from 0.05 to 50 μm, in particular 0.1 to 50 μm, preferably 0.2 to 30 μm, particularly preferably 0.2 to 20 μm, very particularly preferably 0. 5 to 10 µm.

The nonwovens can be mechanically strengthened by needling, meshing or by swirling using sharp water jets, so-called spunlaced nonwovens. Nonwovens can also be produced, for example, by spunbonding, meltblow processes and preferably by electrospinning. Adhesively bonded nonwovens are created by bonding the fibers with liquid binders, for example acrylate polymers, SBR/NBA, polyvinyl ester or polyurethane dispersions, or by melting or dissolving so-called binding fibers that are added to the nonwoven during manufacture. In the case of cohesive bonding, the fiber surfaces are dissolved using suitable chemicals and connected by pressure or welded at elevated temperatures. Nonwovens made from so-called spunbonded nonwovens, i.e. fabrics produced by spinning and then depositing, inflating or sponging onto a conveyor belt, are called spunbonded nonwovens. In order to achieve the filter effect, the filter element is preferably designed with smaller pores than another fabric layer. The shape of the filter element can be adapted to the person's face to form a so-called CUP mask or be designed to be foldable to form a so-called folding mask.

The filter element can have an average pore size or average mesh size—depending on the type of fabric layer—of greater than 1 μm, in particular greater than 10 μm, preferably greater than 50 μm, particularly preferably greater than 100 μm, or more than 200 μm. In this way, a good separation rate with regard to particles and aerosols and/or a low breathing resistance can be achieved. Furthermore or additionally, the filter element can comprise an electrostatic material, in particular an electret, through which small dust particles and liquid droplets can be bound by electrostatic forces. The ratio or the quotient of the mean pore size or mesh size to the mean diameter of the textile fibers of the filter element is particularly preferably in the range from 0.1 to 2,000, in particular 1 to 500, preferably 5 to 350, more preferably 10 to 300, most preferably 25 to 250. In particular, the ratio or the quotient of the average pore size or mesh size to the average diameter of the textile fibers of the filter element should be no more than 2,000, in particular no more than 500, preferably no more than 350, particularly preferably no more than 300, very particularly preferably no more than 250. However, the ratio or the quotient of the average pore size or mesh size to the average diameter of the textile fibers of the filter element should be at least 0.1, in particular at least 1, preferably at least 5, particularly preferably at least 10, very particularly preferably at least 25, even more preferably at least 40 , amount. In this way, particularly efficient separation rates with regard to pathogens and aerosols are achieved.

In order to achieve an efficient separation rate with regard to pathogens, the filter element can have an average efficiency Em according to DIN EN 779 (July 1993) of at least 40%, in particular at least 50%, preferably at least 70%, particularly preferably at least 90%, very particularly preferably at least 95%. For this purpose, the filter element can also have an average degree of separation Am according to DIN EN 779 (July 1993) of at least 50%, in particular at least 70%, preferably at least 90%, particularly preferably at least 95%, very particularly preferably at least 99%. The filter element is advantageously designed in such a way that, at an inflow velocity of 0.1 m/s, it has an average separation rate of at least 80%, in particular at least 90%, preferably at least 95%, for particles and/or aerosols with diameters in the range from 1 to 100 µm %, having.

According to a preferred development, the clamping element is applied to the filter element before the resilient tab is introduced. In this respect, a separate clamping element can first be produced as described, which is in particular glued with its upper side to the filter element, for example. Likewise, the clamping element can first be applied to the filter element and then be produced as described. In this case, the flat material is preferably designed as a plastic film with a thickness of, for example, 1, 2 or 3 mm and/or the filter element is punched in the same way when it is introduced, for example by punching. The filter element and the clamping element can be manufactured simultaneously, for example the clamping element arranged on the filter element can be punched out in a single manufacturing step, as described below.

There are fundamentally different ways of inserting the tab. According to a particularly preferred development, the method includes the step of inserting the tab by punching and/or cutting, punching and/or cutting an opening in the filter element in the area of the tab, and/or simultaneously punching and/or cutting the tab to insert it and the opening into the filter element in the area of the tab.

A tool is advantageously used for punching, which comprises, for example, a 'large' U and a 'small' U, the transverse sides of which overlap in particular at the contact line and the longitudinal sides of which are of the same length. Preferably, the outer parts have an identical transverse width, which is also identical to the transverse width of the central part. Instead of a U, other shapes can also be provided, for example a U with rounded corners, a circular shape, etc.

• nach Einbringen der Lasche, Biegen des Klemmelements über eine durch die Lasche definierte Biegelinie, so dass sich die Lasche entlang ihrer Kontaktlinie von dem Klemmelement abhebt, zum Einbringen des Kopfbefestigungsbands unter die abgehobene Lasche, und
• Zurückbiegen des Klemmelements, so dass die Kontaktlinie an dem Klemmelement zu liegen kommt und die äußeren Teile der Lasche das Kopfbefestigungsband an das Klemmelement klemmen.

According to a preferred development, the method has the following steps:

• after inserting the tab, bending the clip member about a bend line defined by the tab so that the tab lifts away from the clip member along its line of contact to insert the headgear strap under the lifted tab, and
• Bending back the clamping element so that the line of contact is against the clamping element and the outer parts of the tab clamp the headgear strap to the clamping element.

The bending preferably takes place via a bending line extending in the longitudinal direction of the clamping element. During bending, the tab essentially remains in its original position, so that a gap is created between the tab lifted in this way in relation to the clamping element, into which the head fastening strap can be inserted in a simple manner. Correspondingly, the bending line preferably extends parallel to the contact line along the transverse side of the tab, which is in particular connected in one piece to the clamping element. The bending back preferably takes place due to an inherent stress of the clamping element, for example simply by releasing the bent-up clamping element.

• Einbringen einer seitlichen Aussparung in die äußeren Teile der Lasche, durch welche das Kopfbefestigungsband zwischen Lasche und Klemmelement hindurchführbar ist.

According to a further preferred embodiment, the method has the step:

• Making a lateral recess in the outer parts of the strap, through which the head fastening strap can be passed between the strap and the clamping element.

Preferably, the lateral recess is provided on an outer longitudinal side of the outer part of the tab, which is oriented away from the middle part. Due to the recess, the head fastening strap can be guided more easily through the strap and clamping element, for example to adjust the fit of the protective mask on the person's head, in order to then fix the head fastening strap between the transverse side of the strap and clamping element. The recess is preferably V-shaped, with the tip of the V being able to be oriented away from the contact line.

• Verbinden des mittleren Teils mit dem Klemmelement mittels Verschweißen und/oder Verkleben.

The middle part can be connected to the clamping element in a number of ways. According to a particularly preferred development, the method has the step:

• Connecting the middle part to the clamping element by means of welding and/or gluing.

In this way, the middle part can be automatically connected to the contact line with the clamping element, preferably on its transverse side facing the contact line, in a simple manner.

According to a further preferred development, the resilient tab is U-shaped and/or if the resilient tab is oriented towards an edge of the protective mask, the filter element completely or at least partially overlaps the clamping element and/or the middle part of the tab is U-shaped designed. The clamping element can be formed, stamped, composed and/or cut from the flat material. The tab can be produced by a U-shaped punching in a manufacturing process with the filter element. Oriented towards an edge of the protective mask means in particular that the U-shaped transverse side is oriented towards the edge, while the tab can be configured on its opposite transverse side with a remaining part of the clamping element in one piece away from the edge of the protective mask. Completely overlapping means in particular that the clamping element does not project beyond the filter element in the direction of the ear when the protective mask is worn. The flat material can be a fabric layer as previously described or plastic. The flat material is preferably sheet-like, flat, arched and/or flat and has a thickness of less than 3, 2, 1 or 0.5 mm, for example.

According to a preferred development, the at least one clamping element is designed to be integrated with the filter element and/or the at least one clamping element is provided within the filter element or the at least one clamping element is provided on the filter element and/or the clamping element is provided on an edge of the filter element . The clamping element is preferably designed in one piece with the filter element. The clamping element can be provided in particular between fabric layers of the filter element within the latter. The at least one clamping element within the filter element is preferably glued to the filter element and/or the at least one clamping element is glued to the filter element.

According to another preferred development, the at least one clamping element is glued, welded and/or sewn to the filter element. The clamping element preferably has a flat and/or flexible design which can be adapted to the shape of the person's face.

According to a further preferred embodiment, the filter element has at least two fabric layers arranged one above the other and the at least one clamping element and at least one of the fabric layers are made of the same material and/or are designed in one piece. The filter element is preferably glued to the fabric layers. In particular, the clamping element is not designed as a plastic component which is attached to the filter element as an extension thereof.

According to another preferred development, the at least one clamping element is provided on the filter element without protruding. The clamping element preferably lies flush on the filter element.

According to a further preferred embodiment, the clamping element has an identification surface. The identification surface is preferably designed as a flat surface and/or is provided in particular laterally next to the filter element, for example offset from it.

The object of the invention is also achieved by a protective mask, with a filter element for covering a part of the mouth and/or nose of a person, at least one head fastening strap for fastening the protective mask to the person's head, and at least one clamping element made of a flat material applied to the filter element , wherein the at least one clamping element has a resilient strap with at least three resilient parts including two outer parts and a middle part, through the spring force of which the outer parts of the strap, the head fastening strap introduced under all parts of the strap can be clamped to the clamping element, and its middle part connected to the clamp member to slidably fix the headgear strap to the clamp member through the connected portion.

According to a preferred development, the at least one clamping element is designed to be integrated with the filter element and/or the at least one clamping element is provided within the filter element or the at least one clamping element is provided on the filter element and/or the clamping element is provided on an edge of the filter element.

According to a further preferred embodiment, the resilient tab is U-shaped, if the middle part of the tab is U-shaped and/or the resilient tab is oriented towards an edge of the protective mask, the filter element completely or at least partially overlaps the at least one clamping element , and/or the clamping element is formed, stamped, consists and/or cut from the flat material.

According to a preferred development, the at least one clamping element is glued, welded and/or sewn to the filter element.

According to a further preferred embodiment, the filter element has at least two fabric layers arranged one above the other and the at least one clamping element and at least one of the fabric layers are made of the same material and/or are designed in one piece.

According to a preferred development, a lateral recess is made in the outer parts of the strap, through which the head fastening strap can be guided between the strap and the clamping element.

Further configurations and advantages of the protective mask result for the person skilled in the art in analogy to the method described above.

character list

The invention is explained in more detail below with reference to the accompanying drawings using preferred exemplary embodiments.

• 1 eine schematische Ansicht eines Teils einer Schutzmaske zum Bedecken einer Mund- und/oder Nasenpartie einer Person mit einem Klemmelement gemäß einem bevorzugten Ausführungsbeispiel der Erfindung,
• 2 eine schematische Teilansicht der Schutzmaske gemäß 1 gemäß dem bevorzugten Ausführungsbeispiel der Erfindung,
• 3 eine schematische Ansicht des Klemmelements gemäß 1 gemäß dem bevorzugten Ausführungsbeispiel der Erfindung,
• 4 eine schematische Seitansicht des gebogenen Klemmelements gemäß 1 gemäß dem bevorzugten Ausführungsbeispiel der Erfindung,
• 5 eine weitere schematische Ansicht des Klemmelements gemäß 1 gemäß dem bevorzugten Ausführungsbeispiel der Erfindung, und
• 6 eine noch weitere schematische Ansicht des Klemmelements gemäß 1 gemäß dem bevorzugten Ausführungsbeispiel der Erfindung.

Show in the drawings

• 1 a schematic view of a part of a protective mask for covering a mouth and/or nose part of a person with a clamping element according to a preferred embodiment of the invention,
• 2 a schematic partial view of the protective mask according to FIG 1 according to the preferred embodiment of the invention,
• 3 a schematic view of the clamping element according to FIG 1 according to the preferred embodiment of the invention,
• 4 a schematic side view of the curved clamping element according to FIG 1 according to the preferred embodiment of the invention,
• 5 a further schematic view of the clamping element according to FIG 1 according to the preferred embodiment of the invention, and
• 6 a still further schematic view of the clamping element according to FIG 1 according to the preferred embodiment of the invention.

Detailed description of the exemplary embodiments

1 shows a schematic view of part of a protective mask 1 for covering a mouth and/or nose part of a person with a clamping element 2 according to a preferred embodiment of the invention, while 2 shows a schematic partial view of a clamping element 2 according to the preferred embodiment of the invention. Finally show 3 , 5 and 6 each according to a schematic view of the clamping element 1 according to the preferred embodiment of the invention, while 4 a schematic side view of the curved clamping element according to FIG 1 according to the preferred embodiment of the invention.

The protective mask 1 has a flat, breathable filter element 3 for covering a person's mouth and/or nose area, which, not shown in detail, has a plurality of textile fabric layers 4 . A first fabric layer 4 is made of a hydrophilic textile material for absorbing moisture from the person's breathing air and is used to be placed on the person's mouth and/or nose area. A second, middle fabric layer 4 has a filtering material such as fleece, an electrostatic material, a combination of the aforementioned or comparable materials in order to filter air flowing through the second fabric layer 4 . A third fabric layer 4 is constructed from a hydrophobic material to repel dirt and/or moisture from the ambient air. The three fabric layers 4 are arranged one on top of the other to cover the entire area and are connected to one another by weaving, gluing, sewing, etc. at their edges and along their areal extension.

On both lateral transverse sides 5 of the filter element 3 are respectively provided an elastic, textile and flat head fastening band 6, which are knotted or welded together at their ends, not shown, and in such a way to fasten the protective mask 1 to the head around the head are manageable. Furthermore, a clamping element 2 is arranged on both transverse sides 5, which is connected to the filter element 3 or, according to an embodiment not shown, is completely overlapped by the filter element 3 and thus does not protrude beyond the filter element 3 in relation to the transverse side 5.

The clamping element 2 has a flat and rectangular extension which rests flush against the transverse side 5 and is significantly smaller than the extension of the filter element 3 . The clamping element 2 is glued, welded and/or sewn to the filter element 3 and is designed in one piece with the filter element 3 in this way. For this purpose, according to an embodiment not shown, the clamping element 2 can be provided within the filter element 3 , namely arranged between two layers of fabric 4 . Likewise, the clamping element 2 as in 1 be provided at an edge of the fabric layers 4 as shown. The clamping element 2 can be made of plastic. Likewise, the clamping element 2 and at least one fabric layer 4 can be made of the same material.

A U-shaped resilient tab 7 is inserted into the clamping element 2 by means of stamping, indicated by a dashed line which, with regard to the U-shaped transverse side, is as in FIG 2 oriented towards the transverse side 5 or is open at its contact line 8 . The tab 7 is not punched out on its opposite side oriented away from the transverse side 5 and merges at a bending line 9 (shown in dashed lines) in one piece into the flat extension of the (remaining) clamping element 2 .

3 shows the clamping element 2 in plan view with the tab 7, which has three resilient parts 10, 11 including two outer parts 9 and a central part 11 bordered by the outer parts 10 in the middle. The individual parts 10, 11 each have a rectangular base area of the same size, with triangular recesses 12 being provided on the outer longitudinal sides of the outer parts 9 in each case. Accordingly, the contact line 8 extends along the three transverse sides of the individual parts 10, 11. In a first manufacturing step, the individual parts 10, 11 are as in FIG 3 punched out, either only in the clamping element 2, which is then later applied to the filter element 3, or in the clamping element 2 already applied to the filter element 3.

In a further manufacturing step, the clamping element 2 is bent over the bending line 9, as shown in the side view in FIG 4 shown so that the tab 7 releases a gap. The head fastening strap 6 is then inserted into the gap. After releasing or bending back the tab 7, shown and indicated in 5 by arrows, the headgear strap 6 passes under the tab 7 and exits through the notches 12 to extend towards the bend line 9 on the clamping member 2. The middle part 11 is then welded to the clamping element 2 at its contact line 8 and fixed in this way, indicated by smaller dashes.

Finally, we're out 6 As can be seen, the head fastening strap 6 is guided away from the bending line 9 in the area of the middle part 11, so that a loop results, as also in FIG 1 and 2 apparent. At the same time, the headgear strap 6 is guided along the contact line 8 between the transverse sides of the outer parts 10 and the clamping element 6, so that the spring force of the tab 7 or the outer parts 10 clamps the headgear strap 6 and thus in its position in relation to the clamping element 2 fixed. As a result, the head fastening strap 6 cannot slip out of the clamping element in the direction of the head. In order to now fix the protective mask 1 more firmly on the head, the head fastening strap 6 can be pulled out through the tab 7 and away from the head and remains in the pulled-out state clamped by the tab 7 in its position in relation to the tab 7.

The exemplary embodiments described are merely examples that can be modified and/or supplemented in many ways within the scope of the claims. Each feature described for a particular embodiment can be used on its own or in combination with other features in any other embodiment. Each feature described for an embodiment of a particular category can also be used in a corresponding manner in an embodiment of another category.

Reference List

1

protective mask

2

clamping element

3

filter element

4

fabric layer

5

transverse side

6

head attachment strap

7

tab

8th

contact line

9

bending line

10

outer part

11

middle part

12

recess

Claims (13)

Method for producing a protective mask (1) for covering a part of the mouth and/or nose of a person, with the steps: Introduction of at least one resilient tab (7) with at least three resilient parts (10, 11) including two outer parts (10) and a middle part (11) in a clamping element (2) made of a flat material, Insertion of at least one head attachment strap (6) for attaching the protective mask (1) to the person's head under all parts of the strap (7), so that the head attachment strap (6) can be attached by the spring force of the outer parts (10) of the strap (7). the clamping element (2) can be clamped, connecting the central part to the clamping element (2) in order to slidably fix the headgear strap (6) to the clamping element (2) through the connected central part (11), and Applying the clamping element (2) to a filter element (3) to cover the mouth and/or nose part of the person to obtain the protective mask (1). Method according to the preceding claim, wherein the clamping element (2) is applied to the filter element (3) before the resilient tab (7) is introduced. Method according to one of the preceding claims, with the step: Insertion of the tab (7) by punching and/or cutting, punching and/or cutting an opening in the filter element (3) in the area of the tab (7), and/or simultaneous punching and/or cutting of the tab (7) for insertion same and the opening in the filter element (3) in the region of the tab (7). Method according to one of the preceding claims, with the steps: after inserting the tab (7), bending the clamping element (2) over a bending line (9) defined by the tab (7), so that the tab (7) lifts off the clamping element (2) along its contact line (8), for inserting the head fastening strap (6) under the lifted tab (7), and Bending back the clamping element (2) so that the contact line (8) comes to rest against the clamping element (2) and the outer parts of the tab (7) clamp the head strap (6) to the clamping element (2). Method according to one of the preceding claims, with the step: Making a lateral recess (12) in the outer parts (10) of the strap (7), through which the head fastening strap (6) can be passed between the strap (7) and the clamping element (2). Method according to one of the preceding claims, with the step: Connecting the middle part (11) to the clamping element (2) by means of welding and/or gluing. Method according to one of the preceding claims, the resilient tab (7) is U-shaped and/or the resilient tab (7) is oriented towards an edge of the protective mask (1), the filter element (3) the clamping element (2) completely or at least partially overlapped, and/or the middle part of the flap (7) is U-shaped. protective mask (1), with a filter element (3) for covering a part of the mouth and/or nose of a person, at least one head strap (6) for attaching the protective mask (1) to the person's head, and at least one on the filter element (3) applied clamping element (2) made of a flat material, wherein the at least one clamping element (2) has a resilient tab (7) with at least three resilient parts (10, 11) including two outer parts (10) and a middle part (11), through the spring force of which the outer parts of the tab (7) the head fastening strap (6) introduced under all parts (10, 11) of the flap (7) clamps to the clamping element (2), and the central part (11) of which is connected to the clamping element (2) to pass through the head fastening strap (6). to slidably fix the connected central part (11) to the clamping element (2). Protective mask (1) according to the preceding protective mask (1) claim, wherein the at least one clamping element (2) is designed to be integrated with the filter element (3), and/or the at least one clamping element (2) is provided within the filter element (3). or the at least one clamping element (2) is provided on the filter element (3) and/or the clamping element (2) is provided on an edge of the filter element (3). Protective mask (1) according to one of the preceding protective masks (1) claims, wherein the resilient tab (7) is U-shaped, the middle part of the tab (7) is U-shaped and/or the resilient tab (7) is oriented towards an edge of the protective mask (1), the filter element (3) completely or at least partially overlaps the at least one clamping element (2), and/or the clamping element (2) is formed, stamped, consists and/or cut from the flat material is. Protective mask (1) according to one of the preceding protective mask (1) claims, wherein the at least one clamping element (2) is glued, welded and/or sewn to the filter element (3). Protective mask (1) according to one of the preceding protective mask (1) claims, wherein the filter element (3) has at least two fabric layers (4) arranged one on top of the other and the at least one clamping element (2) and at least one of the fabric layers (4) are made of the same material and/or is designed in one piece. Protective mask (1) according to one of the preceding protective mask (1) claims, wherein a lateral recess is made in the outer parts of the strap (7) through which the head fastening strap (6) can be passed between the strap (7) and the clamping element (2). is.

Images