# US 2022/0034036 A1 · Press cover, use thereof, and press roll, shoe press and use of a reinforcing thread in a press cover > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0034036 A1 - Document ID: US20220034036A1 - Status: Published application - Kind: A1 - Application number: 17/277,390 - Filed: 2019-07-10 - Published: 2022-02-03 - Earliest claimed: 2018-09-18 - Assignees: Voith Patent GmbH - Applicants: Voith Patent GmbH - Inventors: THOMAS FRUEHAUF; KLAUS HERMANN; MICHAEL WOKUREK; JUANHAO ZOU - Web page: https://patentgrep.com/patent/US20220034036A1 ## CPC - D21F 3/0227: {Belts or sleeves therefor} - D21F 3/0236: {manufacturing methods} - D21F: PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON ## Abstract A press cover contains at least one polymer layer in which a reinforcing structure is embedded. The reinforcing structure contains at least one reinforcing thread, wherein the material of the reinforcing structure and that of the at least one polymer layer are selected such that the visible light transmittances thereof differ from each other. ## Claims ### Claim at position 1 1-16. (canceled) ### Claim 17 A press cover, comprising: at least one polymer layer; and a reinforcing structure embedded in said at least one polymer layer, said reinforcing structure having at least one reinforcing thread, wherein a material of said reinforcing structure and that of said at least one polymer layer are chosen in such a way that visible light transmittances thereof differ from one another. ### Claim 18 (depends on 17) The press cover according to claim 17, wherein a transmittance of said material of said at least one polymer layer is higher than a transmittance of said reinforcing structure. ### Claim 19 (depends on 17) The press cover according to claim 17, wherein a transmittance of said material of said at least one polymer layer is between 50% and 90%. ### Claim 20 (depends on 17) The press cover according to claim 17, wherein: said at least one polymer layer is produced from polyurethane or contains said polyurethane; and said at least one reinforcing thread is produced from a polymer or contains said polymer, said polymer is selected from the group consisting of a polyester, polyethylene naphthalate and polyamide. ### Claim 21 (depends on 17) The press cover according to claim 17, wherein said at least one polymer layer is uncolored. ### Claim 22 (depends on 17) The press cover according to claim 17, wherein said at least one reinforcing thread is provided as a longitudinal thread, which extends in a longitudinal direction of the press cover. ### Claim 23 (depends on 22) The press cover according to claim 22, wherein said at least one reinforcing thread is one of a plurality of reinforcing threads provided as longitudinal threads which, extend in the longitudinal direction of the press cover, and are disposed parallel to one another at a distance over a circumference of the press cover. ### Claim 24 (depends on 23) The press cover according to claim 23, further comprising at least one further reinforcing thread as a circumferential thread. ### Claim 25 (depends on 24) The press cover according to claim 24, wherein said reinforcing threads configured as said longitudinal threads and said at least one further reinforcing thread configured as said circumferential thread form a laid fabric with one another. ### Claim 26 (depends on 25) The press cover according to claim 25, wherein as viewed in a radial direction of the press cover, said longitudinal threads are spaced apart in the radial direction relative to said circumferential thread at crossing points. ### Claim 27 (depends on 17) The press cover according to claim 17, wherein said at least one polymer layer is one of a plurality of polymer layers, said at least one polymer layer, viewed in relation to a longitudinal axis of the press cover, is a radially inner or innermost polymer layer and, a further polymer layer of said polymer layers is a radially outermost polymer layer of said polymer layers, viewed in relation to the longitudinal axis of the press cover. ### Claim 28 (depends on 27) The press cover according to claim 27, wherein said plurality of polymer layers is exactly two polymer layers, and said radially inner polymer layer is at a same time the radially innermost polymer layer of the press cover. ### Claim 29 (depends on 18) The press cover according to claim 18, wherein the transmittance of said material of said at least one polymer layer is 1.1. to 1.5 times higher than the transmittance of said reinforcing structure. ### Claim 30 (depends on 19) The press cover according to claim 19, wherein the transmittance of said material of said at least one polymer layer is between 50% and 75%. ### Claim 31 (depends on 24) The press cover according to claim 24, wherein said circumferential thread extends in a form of a helix in a circumferential direction of the press cover within the at least one polymer layer. ### Claim 32 (depends on 25) The press cover according to claim 25, wherein said reinforcing threads configured as said longitudinal threads and said at least one further reinforcing thread configured as said circumferential thread form said laid fabric in such a way that said longitudinal threads are disposed radially within said circumferential thread, viewed in relation to a longitudinal axis of the press cover. ### Claim 33 (depends on 17) A press roll for a shoe press for treating a fibrous web, the press roll comprising: at least one press cover according to claim 17. ### Claim 34 (depends on 17) A shoe press for treating a fibrous web, the shoe press comprising: a press roll and an opposing roll which together form or delimit a nip, wherein said press roll containing a circulating press cover, said circulating press cover being formed according to claim 17. ### Claim 35 (depends on 17) A method of using a press cover, which comprises the steps of: providing the press cover according to claim 17 for a press for treating a fibrous web. ### Claim 36 A method of building a structure, which comprises the steps of: disposing at least one reinforcing thread, functioning as a reinforcing structure, in a press cover, the press cover having at least one polymer layer in which the reinforcing structure is embedded, wherein a material of the reinforcing structure and that of the at least one polymer layer are chosen in such a way that visible light transmittances thereof differ from one another.