DE2717968A1 - DISPOSABLE BREATHING MASK, METHOD AND DEVICE FOR MANUFACTURING THE SAME - Google Patents

Description

2717963

A cup-shaped Finmal-At-.rnnaske consisting of several layers is created, which has a heat-sealed edge and whose outline is such that the same up. A fixed deformable ^v? .Senteil ensures a tight f.npassung over the upper part of the nose, and a loose filter media between inner and abrasion-resistant layers of the main HUSSEREN Korner leads to a low Atmungsv.'iderstand, wherein the filter effect by a particulate material with likron-TrOHe. Vs headbands are attached to the heat-coated edge. ^: There is a double-acting tool for the instructor, the head of the breathing mask, consisting of a flat piece of material, converted into the final form and size by means of a single work area.

Usually, in contrast to surgical masks and the like, breathing masks have facial parts in which detachable filter cartridges are arranged, which are thrown away after use, but the ganeal part has to be sterilized or at least cleaned and occasionally repaired before being used again. In contrast to Linmal devices such as surgical masks, respiratory masks for protection against dust and mist have thus been designed in such a way that they are used repeatedly either by using long-labial, relatively heavy filter media, which require ventilation to prevent breathing facilitate or ilterpatronen by ^ "Lvenden only once-to-use ^p.

j'.iniial only to be used surgical J-IaSken are known and since Has been used for decades. In the field of respiratory protection where there is a much stronger and different respiratory protection is required, there is a need for an only oinnal applicable Breathing mask that is free of unsightly and costly ventilation valves and / or related equipment which an optimal respiratory protection aeaen dust particles with micron drops or fog can be achieved, as well as the breathing mask in more economical Can also be thrown out after a single use can.

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ORIGINAL INSPECTED

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The main object underlying the invention thus exists in creating a disposable breathing mask that is in league with the only once used surgical masks and dal. a respiratory protection against the misshapen material with micron size and lever. Another task underlying the invention is to Create a breathing mask of the anaea-level kind, the largest possible Offers comfort, shows the least possible breathing resistance and is exceptionally light.

Another object underlying the invention is to to provide a novel apparatus and method for manufacturing breathing masks at a cost that makes it economical will throw away the breathing mask after a single use.

The tasks on which the invention is based are achieved by that looks like a multilayer, leaf-shaped material by applying '.' "errne and truck a cup-shaped grain is created, the edge of which is sealed and such outline shape shows that it fits around the mouth, chin and lens. That sheet-like material consists of a first outer layer of polyester and vinyl acetate fibers (modified vinyl chloride polymer), a middle, loose filter web made of vinyl acetate, polyester, rayon and glass fibers and a second outer layer an intimate network of polyester fibers with a vinyl chloride binder. The aforementioned layer is used for forming the inner surface of the cup-shaped body of the breathing mask and all three layers are warmed up simultaneously with the application of pressure around their Xante. The heat-sealed Edge extends partially at preselected locations on the perimeter of the main body of the breathing mask outwardly mn ^ orm of protrusions, to which the ends of elastic headbands are glued. Fs becomes a deformable nose piece, preferably made of metal externally glued over the bulk part of the main body of the breathing mask, so that the nose part in a given, closely matched ratio to the sides and the top of the nose. This close fit is achieved because the deformable The piece of nose is pressed towards the nose after the breathing mask has been placed on the face.

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271796

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The body of the breathing mask together with the heated, sealed edge and the headband protrusions, but excluding the headgear and the nosepiece, is formed by inserting a portion of the sheet material into a heated cavity of a Tool is pressed. The heat deformation to the desired Configuration and heat sealing of the edge are done at the same time executed. This is followed by shearing off the circumference of the breathing mask body to the desired final shape and size at. A dual action tool can be used to perform these operations.

An embodiment of the invention is shown in the drawings and is described in more detail below. Show it:

Fig. 1 is a front elevation of a preferred embodiment of the invention;

FIG. 2 shows a plan view from above of the breathing mask shown in FIG. 1;

Figure 3 is a rear elevation of the breathing mask;

4 shows, in vertical cross section, a device which is suitable for producing the main parts of the breathing mask according to the invention is.

With reference to Figures 1, 2 and 3, the breathing mask 12 has a deep cup configuration. The body 12 has such an outline shape and dimension that it fits closely together adapted to extend over the nose, cheeks and chin including the mouth and nose of the user, being inside of the deep cup-shaped interior 14 (see Figure 3) is sufficient Breathing space remains.

The body 12 of the breathing mask 10 is made of a flat, multilayered one Material deformed into the configuration shown in FIGS. 1 to 3 under the application of heat and pressure. The flat one Material (sheet 16) that is used to manufacture the breathing mask according to the invention is suitable is shown in FIG. The sheet-like material 16 consists of a first outer fabric-like Surface made of polyester and vinyl fibers (vinyl chloride polymer modified with vinyl acetate), a central, loose filter section

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20 made of vinyon, polyester, viscose and glass fibers and a second Surface 22 made of a network consisting of polyester fibers in a polyvinyl chloride binder. The fibers along the surface 22 of the sheet-like material 16 are built into the structure of the body 12 so that a breathing mask 10 with a smooth, wrinkle-free, abrasion-resistant, outer (convex) surface results.

Quite an effective combination of fibers for the filter section 20 can be made from approximately 53% vinyon fibers with 3 denier, 30% polyester fibers with 2.25 denier, 5% viscose fibers (rayon? With 0.75 denier and 12% glass fibers with a diameter of about 0.5 microns.

The surfaces 18, 22 and the filter section 20 are at their edges hermetically sealed around the entire circumference of the main body 12 with the formation of an edge 24 adapted to the face. At certain points around the edge 24 the same is elongated with the formation of protrusions 26, see in particular Figure 3. On these protrusions, using e.g. elastic headbands 28 and 30 attached using a hot melt adhesive. The soft nature of the design of the interior of the body 12 adjacent to the edge 24 results in a gentle but highly effective one Face sealing.

over the uppermost nose part of the main body 12 and attached to it, e.g. using hot melt glue, extends an angled and preferably made of metal nose piece 32 (see Figures 1 and 2). By means of this arrangement can the breathing mask easily bequeir. and tight over the upper part and the Sides of the nose are placed by applying pressure to the nasal portion 32 through the fingers after the breathing mask has been placed on the face. The nose piece 32 is designed to be deformable, but retains its shape after the deformation which enables the mask to be optimally adapted to all nose shapes and sizes. The nose poses the most difficult Face part for adjustment and sealing. For this purpose an aluminum strip with a thickness of 0.5 mm and a width of about 6.1 mm can be used.

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The headbands 2 3 UNR 3O are intended to extend up to the back of the head and the neck part at the locations where this is ar · ¹ comfortable for the user and / or convenient. Headbands never consist of knitted elastic "change" or other adjustable straps.

"The formation of the main body 12 including the sealed Edge 24 and the projections 26 should take place by means of a single process step and for this purpose is shown in FIG. 4 a dual acting tool 34 is shown which picks up the sheet material 16 from which the main body 12 of the respirator is made will.

The tool 34 has a base part 36 made of aluminum, stainless steel or other * rigid, thermally conductive material is. Oas 3asisteil 36 has a cavity 38, which is preferably has a smooth surface and the shape and size that the main body 12 of the breathing mask 10 should have. To the open The end of the cavity 38 in the base part 36 is a shoulder 40 is provided, the width of which is equal to the intended edge 24 of the body 12. The "base part 36 is preferably by means of electrical Heating elements 42 in the form of the generally known heating cartridges heated. It goes without saying, however, that each any other suitable heating arrangement can be used which results in a practically uniform temperature of the surfaces of the cavity 33 leads.

Extending over the base portion 36 of layer 43 of an insulating material prevents excessive VJärmeverlust by conduction from the base part 36 in the ^T? Erkzeugteil 45 and / or other associated device, not shown here.

The corresponding or uppermost segment of the tool 34, see FIG. 4, has a stamp 44 which is preferably made from a v / oak natural or synthetic rubber, for example a commercially available silicone rubber which is commercially available under the name 35 Durometer RTV 700 Silicone is known and is brought to the trade by General Elektrik.

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The punch 44 has such a contour shape and dimensions, that the same .with a clear distance of approx. 0.5 mn completely around the circumference of the cavity 33, i.e. adjacent the shoulder of the base portion 36 when centered therewith is. The same is reinforced by a rigid mounting plate 46, which in turn is attached to a second plate 48 by means of bolts 50 is. Between the plates 46 and 48 shims 52 are arranged, which are used to adjust the depth up to the the punch 44 can enter the hollow space 38.

The plate 48 is provided with a downwardly and inwardly shouldered rim 54, preferably with cartridge heaters 56 is heated so as to form the aforementioned, wedge-sealed edge 24 of the main body 12 of the breathing mask. This is achieved in that the edge 54 of the plate 43 in the direction of the shoulder 40 of the pas part 36 and against the sheet material 16 is pressed. The results you want

2 are achieved by applying a pressure of 35 - 42 kg / cm.

The shear part 60, which is used for this purpose, extends over the plate 48 will cut the heat sealed edge 24 of the main body 12 to the final circumferential size and configuration. The shear part 60 has a downwardly guided, annular blade 62, which are slidably guided along the side 58 of the plate 48 can and exerts this cut-off function when moving downwards in the direction of the base part 36. The main part of the Shear part 60 is connected to plate 48 by means of bolts 64. The shear part 60 is covered with a layer 66 of a heat insulating Material provided, whereby an excessive heat transfer rate of the tool 34 in the associated support and working mechanism, of which only a part (the punch 68) is shown here impede. It goes without saying that the tool 34 can be used by any suitable means manual or automatically operated press mechanism can be operated.

The compression springs 70 normally hold the blade 6 2 of the shear part 60 in the retracted position shown here on the plate 48. These springs have opposite compression a preselected resistance such that a suitable pressure

2
for example 35 - 42 kg / cm dvyrck jCera * stamp 68 is applied v / ground

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must before the shear part 60 comes into operation. This results in a complete heat seal of the edge 24 of the main body of the respirator prior to cutting to the final shape and Size is done. This latter Vorqang results from the application of sufficient pressure to the tool 34 Gtempel 68 by overcoming the resistance of the springs 70 opposite a squeeze.

When forming the main body 12 of the breathing mask 10 using of the tool 34, the punch 44 is first completely withdrawn from the cavity 38, and then the flat Material 16 passed through the cavity opening. Then the punch 38 is lowered against the material 16, whereby the same completely is printed in the cavity 38 until the said pressure of 35-42 kg / cm is applied against the part of the material 16, that extends over shoulder 40. In the contact area of the plate 48 with the flat material 16, the plate 48 is on heated to a temperature of around 150 - 165 ° C, which makes the heat-sealed ^ and 24 of the body 12 is formed. Simultaneously the temperature of the base part 36 along the surface of the cavity 33 is maintained at about 95 ° C, creating the cup-shaped Shape of the body 12 is made permanent. The trimming with the shear part 60 is then carried out, and the punch 44 is finally withdrawn so that the completed main body 12 can be removed from the tool 34. Of the entire operation for forming the finished body 12, including opening and closing times, can be seen in FIG Perform less than 5 seconds.

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Claims (15)

PATENT ADVERTISER D-I BERLIN 33 April 20, 1977 MANFRED MIEHE falkenr.ed4 Telephone: (030) 8 J119 SO Chemist Telegrams: INtHTSPROP BERLIN Telex: 0185443 US / 02/232 AO-3069 ₂₃₂ £ 7179G8 MFRICAM OPTICAL CORPO K ATIO Southbridge, let. Ο155Ο, USA r: inr; al-Aterirp.aske, method and apparatus for making the same Claims 1, ι. inraal-Atemriaske, characterized in that this ll.e a cup-shaped main body (12) made of a multilayer, Has dust and mist filtering material, the main body (12) Has such a shape and depth for the cup that it fits snugly over the nose, cheeks and chin of the user is given and at the same time the mouth and nose are enclosed, as well as sufficient free space around them is present inside the body, the edges of the layers (t8,20,22) of the filter material sealingly together as an edge (24) around the main body (12) are formed around, as well as headbands (28,30) are present, the opposite ends of which are each attached to the edge (24). 2. L innal breathing mask according to claim 1, characterized aekennzeichn e t that the edge (24) has a plurality of projections (26), to which the ends of the headbands (28,30) are attached. 3. Linal breathing mask according to claim 1, characterized in that that the several layers (18,20,22) of the cup-shaped ntiuotkörpers (13) from a layer (22) of abrasion-resistant fibers with smooth outline form in a binder on the outer convex side, a middle, loose section (20) of loosely mixed together Fibers and an inner concave layer (18) of interconnected fibers. 7 0 9848/0764 ORIGINAL INSPECTED 27179Γ 4. Disposable breathing mask according to claim 3, characterized in that c e k e η η ze i c h net, that the middle, loose section (2C) is made of intermingled vinyon, polyester, viscose (rayon) and Ilas fibers consists. 5. ruler breathing mask according to claim 4, characterized geke η η I net that the proportion of fibers amounts to about 53% vinyl fibers, 30% polyester fibers, 5% viscose fibers and ¹ 12% nlasfascrn. 6. Einroal-iVterimaske according to claim 5, characterized gakennzeichn e t that the vinyl fibers have a thickness of about 3 denier, the polyester fibers a thickness of about 2.25 lerier, the viscose fibers a thickness of about 0.75 denier and the fibers a diameter of about 0.5 microns. 7. E.inmal breathing mask according to claim 1, characterized in that a deformable reinforcing arrangement (32) is attached to the smooth outer surface of the main body (12) adjacent to the ¹ part thereof which extends over the user's nose should extend. 8. Disposable Aterrmaske according to claim 6, davöurch rrekennzeichn et that a deformable reinforcement arrangement (32) is attached to the smooth outer surface of the main body (12) adjacent to the part of the same which is to extend over the nose of the user. 9.Procedure to Et Ebel filtered, flat, sheet-shaped material, aekennzeichn characterized in that the leaf ^ önpige material over the cavity of a tool is brought, the Uohlraym ^'J MnCe and a: preparing the cup-shaped Iiauptteils a Finmal respiratory mask from a multilayer, dust and? Edge which together correspond to the shape and size of the desired configuration of the main body part, then the sheet of material is completely pressed into the cavity and against the edge of the same, while at the same time sufficiently heating the same, so that the sheet-like material remains Assumes the shape of the cavity or the edge, the pressure on the parts of the sheet material adjacent to the '-? And applied pressure and' ^iT 5rre being sufficient. heat the several layers together 1-ings on the circumference and then d-ns in this '' eiso v / ärmeverformte and heat-sealed, hlatt <ävrff.iae "matrial u" i 'lie ur.'. f ng - 3 ORIGiNml ii is trimmed around to form the final shape of the main body. 10. The method according to claim 9, characterized in that that the process steps of pressing, heating, edge sealing and trimming the sheet material under Forming the main body of the breathing mask by means of a single one Operation of a double-acting tool is carried out. 11. The method according to claim 9, characterized in that that a headband is attached to the main body of the breathing mask will. 12. Apparatus for making the main body of a breathing mask starting from a multi-layered dust and mist filtering, sheet-like material, characterized in that, that the same comprises a tool (34) including a rigid base part (36) with a cavity (38), the walls and the edge part of the same correspond in shape and size to the desired external configuration of the main body (12) of the breathing mask resilient plunger (44) having a generally external shape and size that corresponds to the internal configuration of the intended main body (12) corresponds to the breathing mask, an arrangement (68) for moving the ram (44) and the base part (36) away from one another, so as to bring the sheet material (16) over the cavity (38), the movement arrangement (68) still serving to do this selectively moving the punch (44) and the base member (36) towards each other while enclosing the sheet material (16) between the same and the same to press completely into the cavity (38) and over the edge thereof, and an arrangement (42) for heating the part of the base part (36) adjacent to the walls and the edge of the cavity (38), so as to remain define the shape imparted to the sheet material (16) by the punch (44) and the cavity walls. 13. The device according to claim 12, characterized in that that an edge sealing plate (48) is assigned to the resilient punch (44), the edge part (54) of the sealing plate (48) with respect to of the edge (40) of the cavity (38) in the base part (36) in order to allow adjacent parts of the multilayer, leaf 709848/0764 -4- 27179b3 förraiaen ^{: to} compress lafeerials (16) when the plunger (44) and sheet material (16) are fully inserted into the cavity (38), and an arrangement (56) for heating the edge portion of the sealing plate (48) to a temperature sufficient to seal adjacent portions of the multilayer sheet material (16) together as an edge of the main body (12) of the breathing mask. 14. The device according to claim 13, characterized in that that there is a shear member (60) with a blade (62) extending around and independently along the sealing plate (48) can be moved towards and away from the edge of the cavity (33) so as to selectively the main body (12) of the breathing mask cut from the sheet material (16) adjacent the heat-sealed edge thereof. 15. The device according to claim 14, characterized in that that the resilient punch (44), the edge sealing plate (48) and the cutting tool as a unit in the direction up and away of the base part (36) of the tool (34) are movable, wherein the The shear member (60) is selectively independently movable relative to the punch (44) and the edge sealing assembly so as to perform the dual function deforming and cutting away the main body (12) of the breathing mask from the sheet material (16) in the form of a single one nrhitzungsvorganges to accomplish. 709848/0764 ORIGINAL INSPECTED