	US 11,866,885 B2
	Sheet producing method and sheet producing apparatus
Masahide Nakamura, Nagano (JP); Naoko Omagari, Nagano (JP); and Hidemasa Kanada, Nagano (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Aug. 31, 2022, as Appl. No. 17/823,526.
Claims priority of application No. 2021-143078 (JP), filed on Sep. 2, 2021.
Prior Publication US 2023/0062328 A1, Mar. 2, 2023
Int. Cl. D21H 17/28 (2006.01); D21F 3/02 (2006.01); D21H 11/14 (2006.01); D21F 7/00 (2006.01)

CPC D21F 3/02 (2013.01) [D21F 7/003 (2013.01); D21H 11/14 (2013.01); D21H 17/28 (2013.01)]

7 Claims

1. A sheet producing method comprising:

a web forming step of forming a web by accumulating fiber in a dry system;

a water providing step of providing the web with water; and

a compression-heating step of compressing and simultaneously externally heating the web provided with water, wherein

a water content of the web provided with water in the water providing step is 12% by mass or more, and

a compression degree of the web, which is a ratio of a thickness of the web after the compression-heating step to a thickness of the web before the compression-heating step, is 1/7 or less.