# US 2018/0021608 A1 · Filtering Face-Piece Respirator And Method Of Forming Same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0021608 A1 - Document ID: US20180021608A1 - Status: Published application - Kind: A1 - Application number: 15/547,543 - Filed: 2015-02-09 - Published: 2018-01-25 - Earliest claimed: 2015-02-09 - Assignees: 3M Innovative Properties Company - Applicants: 3M Innovative Properties Company - Inventors: Xiaoping Zhou; Tian Tian; Hans Yin; Fan Yang; Mingming Wang - Web page: https://patentgrep.com/patent/US20180021608A1 ## CPC - A62B 23/025: {the filter having substantially the shape of a mask (surgical face masks A41D13/11)} - A41D 13/113: {with a vertical fold or weld} - A41D 13/1146: {obtained by moulding} - A41D 13/1161: {Means for fastening to the user's head} - A41D 2500/30: Non-woven - A62B: DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING (valves specially adapted for medical use A61M39/00; life-saving devices, apparatus or methods specially adapted for use in water B63C9/00; divers' equipment B63C11/00; specially adopted for use with aircraft, e.g. parachutes, ejector seats, {B64D17/00, B64D25/10}; rescue devices peculiar to mining E21F11/00) - A41D: OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES ## Abstract Various embodiments of a filtering face-piece respirator and a method of forming such respirator are disclosed. In one or more embodiments, the filtering face-piece respirator can include a mask body. The mask body can include an inner cover web, an outer cover web, and filter media enclosed between the inner cover web and outer cover web such that the filter media does not extend to an edge of the mask body. ## Claims ### Claim 1 A filtering face-piece respirator comprising a mask body, wherein the mask body comprises: an inner cover web; an outer cover web; filter media disposed between the inner cover web and outer cover web in a filter region of the mask body; and a seal region that defines at least a portion of a perimeter of the mask body, wherein the inner cover web is attached to the outer cover web in the seal region, and further wherein the filter media does not extend into at least a portion of the seal region. ### Claim 2 (depends on 1) The respirator of claim 1, further comprising a harness attached to the mask body. ### Claim 3 (depends on 1) The respirator of claim 1, wherein the mask body further comprises right and left portions on each side of a centerline, wherein the right and left portions are bounded by the perimeter of the mask body. ### Claim 4 (depends on 3) The respirator of claim 3, wherein each of the right and left portions of the mask body comprises an upper panel, a central panel, and a lower panel, wherein the upper panel and central panel are separated by a first line of demarcation, and further wherein the central panel and the lower panel are separated by a second line of demarcation. ### Claim 5 (depends on 4) The respirator of claim 4, wherein each of the first and second lines of demarcation comprises a weld line. ### Claim 6 (depends on 4) The respirator of claim 4, wherein the lower panel of the right portion and the lower panel of the left portion are connected through a vertical fold. ### Claim 7 (depends on 4) The respirator of claim 4, wherein the upper panel of the right portion and the upper panel of the left portion are connected through a second seal region, wherein the filter media does not extend into at least a portion of the second seal region. ### Claim 8 (depends on 7) The respirator of claim 7, wherein the central panel of the right portion and the central panel of the left portion are connected through a third seal region, wherein the filter media does not extend into at least a portion of the third seal region. ### Claim 9 (depends on 7) The respirator of claim 7, wherein the inner cover web, filter media, and outer cover web in the central panel of the right portion are connected to the inner cover web, filter media, and outer cover web in the central panel of the left portion by a weld line adjacent the third seal region. ### Claim 10 (depends on 9) The respirator of claim 9, wherein the inner cover web, filter media, and outer cover web in the upper panel of the right portion are connected to the inner cover, filter media, and outer cover web in the upper panel of the left portion by a weld line adjacent the second seal region. ### Claim 11 (depends on 1) The respirator of claim 1, wherein the filter media comprises a carbon layer. ### Claim 12 (depends on 11) The respirator of claim 11, wherein the carbon layer comprises a nonwoven web and carbon particles enmeshed in the web. ### Claim 13 (depends on 11) The respirator of claim 11, wherein the filter media further comprises a blown microfiber web layer. ### Claim 14 (depends on 1) The respirator of claim 1, wherein the filter media is attached to the inner cover web along a weld line adjacent the seal region. ### Claim 15 (depends on 1) The respirator of claim 1, wherein the mask body is molded into a cup-shaped configuration. ### Claim 16 A filtering face-piece respirator comprising a mask body, wherein the mask body comprises: an inner cover web; an outer cover web; and filter media enclosed between the inner cover web and outer cover web such that the filter media does not extend to an edge of the mask body. ### Claim 17 (depends on 16) The respirator of claim 16, wherein the filter media is attached to at least one of the inner cover web and the outer cover web. ### Claim 18 (depends on 17) The respirator of claim 17, wherein the inner cover web is attached to the outer cover web along the edge of the mask body. ### Claim 19 (depends on 18) The respirator of claim 18, wherein the filter media comprises a carbon layer comprising a nonwoven web and carbon particles enmeshed in the nonwoven web. ### Claim 20 forming filter media; attaching the filter media to an inner cover web; and attaching the inner cover web to an outer cover web to form a seal region that defines a perimeter of the mask body, wherein the filter media is disposed between the inner cover web and the outer cover web, and further wherein the filter media does not extend into at least a portion of the seal region.