# US 2020/0399829 A1 · Clothing for a machine for producing a fibrous web and method for producing a clothing of this type > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0399829 A1 - Document ID: US20200399829A1 - Status: Published application - Kind: A1 - Application number: 16/971,999 - Filed: 2019-01-18 - Published: 2020-12-24 - Earliest claimed: 2018-03-26 - Assignees: Voith Patent GmbH - Applicants: Voith Patent GmbH - Inventors: MICHAEL STRAUB - Web page: https://patentgrep.com/patent/US20200399829A1 ## CPC - D21F 1/0063: {Perforated sheets} - D21F: PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON ## Abstract A clothing for a machine for producing a fibrous web, more particularly a paper or cardboard web, is substantially formed from a film-shaped material having a first surface facing the fibrous web and a second surface facing away from the fibrous web. The clothing includes a plurality of through openings each extending along a central axis from the first surface to the second surface. The central axes of at least some of the through openings in the covering enclose an angle with the first surface which differs from 90°. A machine for producing a fibrous web, more particularly a paper or cardboard web, includes the clothing. A method for producing the clothing includes making the through openings in the film-shaped material by using a laser. ## Claims ### Claim at position 1 1-15. (canceled) ### Claim 16 A clothing for a machine for producing a fibrous, paper or board web, the clothing comprising: a film-shaped material having a first surface facing the fibrous web and a second surface facing away from the fibrous web; said film-shaped material having a multiplicity of passage openings each extending along a respective central axis from said first surface to said second surface; and said central axes of at least some of said passage openings enclosing an angle with said first surface differing from 90°. ### Claim 17 (depends on 16) The clothing according to claim 16, wherein said central axes of at least two of said passage openings enclose angles with said first surface differing from each other. ### Claim 18 (depends on 16) The clothing according to claim 16, wherein said central axis of at least one of said passage openings has a directional component oriented parallel to a longitudinal direction of the clothing. ### Claim 19 (depends on 16) The clothing according to claim 16, wherein: said central axes of a plurality of said passage openings have a directional component oriented parallel to a longitudinal direction of the clothing; and said directional components of said central axes of most or all of said plurality of said passage openings point in an identical direction. ### Claim 20 (depends on 16) The clothing according to claim 16, wherein said central axis of at least one of said passage openings has a directional component oriented parallel to a transverse direction of the clothing. ### Claim 21 (depends on 16) The clothing according to claim 16, wherein: said central axes of a plurality of said passage openings have a directional component oriented parallel to a transverse direction of the clothing; and said directional components of said central axes of approximately half of said plurality of said passage openings point in a direction opposite to said directional components of said central axes of a remainder of said plurality of said passage openings. ### Claim 22 (depends on 21) The clothing according to claim 21, which further comprises: a first side edge and a second side edge delimiting the clothing; and said passage openings having said central axes with directional components oriented parallel to the transverse direction and all pointing in an identical direction being disposed closer to said first side edge than said passage openings having said central axes with directional components oriented parallel to the transverse direction and pointing in the opposite direction. ### Claim 23 (depends on 21) The clothing according to claim 21, which further comprises: two side edges delimiting the clothing; two edge regions adjacent said two side edges; and a central region disposed centrally between said two side edges; said central axis of at least one of said passage openings in one of said edge regions having a greater difference from a 90° angle enclosed with said first surface than said central axis of at least one other of said passage openings in said central region. ### Claim 24 (depends on 23) The clothing according to claim 23, wherein said edge regions are viewed in the transverse direction of the clothing. ### Claim 25 (depends on 16) The clothing according to claim 16, wherein said clothing is a forming clothing or wire. ### Claim 26 (depends on 16) A machine for producing a fibrous, paper or board web, the machine comprising a clothing according to claim 16. ### Claim 27 (depends on 26) The machine according to claim 26, which further comprises a forming section of the machine, the clothing being installed in said forming section. ### Claim 28 (depends on 26) The machine according to claim 26, wherein: said central axes of a plurality of said passage openings of the clothing installed in the machine have directional components oriented parallel to the longitudinal direction of the clothing; and said directional components of said central axes of most or all of said plurality of passage openings point in a direction opposite to a running direction of the clothing. ### Claim 29 A method for producing a clothing for a machine for producing a fibrous, paper or board web, the method comprising the following steps: providing a film-shaped material having a first surface facing the fibrous web and a second surface facing away from the fibrous web; using a laser to introduce a multiplicity of passage openings in the film-shaped material, each of the openings extending along a respective central axis from the first surface to the second surface; and orienting the central axes of at least some of the passage openings to enclose an angle with the first surface differing from 90°. ### Claim 30 (depends on 29) The method according to claim 29, which further comprises using mirror optics functionally connected to the laser to introduce at least two of the passage openings into the film-shaped material at angles differing from one other and enclosing angles differing from 90° with the first surface.