Sheet manufacturing apparatus and method of manufacturing sheets

Patent metadata

Field	Value
Publication number	US-2025171961-A1
Application number	US-202418959756-A
Country	US
Kind code	A1
Filing date	Nov 26, 2024
Priority date	Nov 28, 2023
Publication date	May 29, 2025
Grant date	—

Abstract

A method of manufacturing a sheet, includes: moistening a web formed by depositing fibers; transporting the web downstream with the web pressed against a first roller by a pressing roller; after a transportation roller located downstream of the first roller nips the web, stretching the web with the pressing roller away from the first roller and the web; and drying the moistened web by heating the first roller, to manufacture a sheet.

First claim

What is claimed is:

1 . A method of manufacturing a sheet, comprising:
depositing a material containing fibers to form a web; moistening the formed web; transporting the web downstream with the web pressed against a first roller by a pressing roller; after a transportation roller located downstream of the first roller nips the web, stretching the web with the pressing roller away from the first roller and the web; and drying the moistened web by heating the first roller, to manufacture a sheet.

2 . The method of manufacturing a sheet according to claim 1 , further comprising
when a leading end of the web reaches the transportation roller located downstream of the first roller and configured to transport the web, pressing the web wound around the first roller against the first roller by using the pressing roller.

3 . The method of manufacturing a sheet according to claim 1 , further comprising:
measuring temperature of the first roller; and when the first roller is rotating, and the temperature of the first roller becomes a set temperature, pressing the web against the first roller by using the pressing roller.

4 . The method of manufacturing a sheet according to claim 1 , further comprising
after the pressing roller moves away from the web, pressing the web against the first roller by using the pressing roller.

5 . The method of manufacturing a sheet according to claim 4 , wherein
a pressing load of the pressing roller before the pressing roller moves away is lower than a pressing load of the pressing roller for pressing after the pressing roller once moves away.

6 . A sheet manufacturing apparatus comprising:
a deposition unit configured to deposit a material containing fibers to form a web; a humidification unit configured to moisten the formed web; and a forming unit configured to form the web into a sheet, wherein the forming unit includes
a first roller configured to heat and dry the moistened web,
a transportation roller located downstream of the first roller and configured to nip and transport the web, and
a pressing roller configured to press the web against the first roller,
the pressing roller presses the web against the first roller during a period from a point before a leading end of the web reaches a position of the pressing roller until the transportation roller nips the web, and the pressing roller moves away from the first roller and the web after the transportation roller nips the web.

7 . The sheet manufacturing apparatus according to claim 6 , wherein
the forming unit further includes a spring configured to change a pressing load of the pressing roller for pressing the sheet against the first roller.

Assignees

• Seiko Epson Corp

Inventors

• Nagai Yoshikazu
• Hashimoto Akira
• Tamura Tetsuya

Classifications

• D21H11/14

  Secondary fibres (working-up waste paper D21C5/02) · CPC title

• D21F11/00

  Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines · CPC title

• D21F9/02 Primary

  of the Fourdrinier type · CPC title

• D21F3/08

  Pressure rolls · CPC title

• D21F3/0281

  in combination with a dryer roll · CPC title