PROTECTIVE MASK AGAINST BIOLOGICAL AGENTS MADE OF TWO PARTS
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Accused Products
Abstract
The invention refers to a personal protective equipment for the respiration that is made up of an upper (1) and a lower (2) part characterized in that the two parts are both flat and exactly identical, are circle-shaped with a straight edge and a curved one, arc-shaped, and are linked together through the curved edge (3). The equipment can be re-positioned in a folded position for storage, while during the use, it creates an air-chamber, crescent shaped, over the nose and the mouth of the user, and the linear edges of the two parts are in contact with the face. The protective equipment of the invention, thanks to its small size, high comfort and high sealing along its perimeter, is particular effective in the applications where a high tightness is required for high protection level such as the use to protect against biological agents.
39 Citations
57 Claims
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1-31. -31. (canceled)
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32. Personal protective equipment for the respiration made up of an upper and a lower part wherein the two parts are both flat, exactly identical, circle-shaped with a straight edge and a curved one, and are linked together through the curved edge, characterized in that the linear edge length of the two parts is comprised between 170 and 260 mm, the distance between the middle of the linear edge and the middle of the curved edge of the two parts is comprised between 70 and 140 mm, and the radium of the circular section is comprised between 85 and 155 mm. The equipment can be re-positioned in a folded position for storage with the two parts perfectly overlapping, while during the use, it creates an air-chamber, crescent shaped, over the nose and the mouth of the user, and the linear edges of the two parts are in contact with the face;
- in particular, once the mask has been worn, the linear edge of the upper part gets in touch with the nose and the high part of the face of the user, while the linear edge of the lower part is in touch both with the chin and the lower part of the user face.
- View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. Process for manufacturing personal protective equipment for the respiration characterized in the following steps:
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cutting rectangular pieces of the fabric through a cutting shaped hollow punch (also creating the hole for the value, if required) fixing the accessories, if any, as gaskets, valves, clips, adhesive band overlapping two rectangles of fabric to create the two parts of the PPE joining the materials along the curved profile of an arc (and junction of the valve, if any) cutting using a circular shaped hollow punch (and creation of the two strips where to put the elastic band-holders) fixing the elastic bands (subject to fix the elastic band holders) - View Dependent Claims (54, 56, 57)
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55. Process for manufacturing personal protective equipment for the respiration with multi-layer structure, complete with an exhaling valve, gaskets, adhesive band, strips for the elastic band holders, elastic band holders and elastic bands, characterized in the following steps:
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the layers of fabric are overlapped in order to create the upper part and, in the same way, the layers of fabric to create the lower part are overlapped as well, using a shaped hollow punch cutter, some rectangles are cut for the upper part and some for the lower part with a hole for the valve, the different layers of the upper part are ultrasonic welded in the area of the straight profile of the protective equipment and in the area of the edges in order to place the elastic band holders, the same thing for the lower part and the valve is placed using the ultrasonic welding where the hole is located, some EVA stripes are jointed through an adhesive to create the gaskets for the lower part, some EVA stripes are jointed through an adhesive, a nose clip put in between, in order to create the gaskets for the upper part, using a hollow punch cutter the stripes are shaped and then attached with the adhesive to the correspondent parts, a bi-adhesive tape, with a peel-off protective film, is put on the upper part, behind the nose clip, the upper and lower parts are jointed through ultrasonic welding along the curved profile of the round part, through a shaped cutter the protective equipment is cut along the perimeter that includes the two edges to place the elastic band holders, the two elastic band holders are fixed on the two edges through an ultrasonic welding, therefore the elastic bands are put into the elastic band holders.
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Specification