US 11,788,230 B2
Paper producing apparatus
Kazuma Miyazawa, Nagano (JP); and Naoya Sato, Nagano (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Sep. 27, 2021, as Appl. No. 17/485,660.
Claims priority of application No. 2020-163400 (JP), filed on Sep. 29, 2020.
Prior Publication US 2022/0098794 A1, Mar. 31, 2022
Int. Cl. D21F 7/06 (2006.01); D21G 9/00 (2006.01); D21F 1/02 (2006.01)
CPC D21F 7/06 (2013.01) [D21F 1/02 (2013.01); D21G 9/0027 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A paper producing apparatus comprising
a sieve portion having a plurality of openings;
a web forming portion having a deposition surface on which a material passing through the openings and containing fibers is deposited, the web forming portion forming a web on the deposition surface;
a sheet forming portion that processes the web into a sheet;
a material supply pipe through which transport airflow containing the material is supplied to an inside of the sieve portion, the material supply pipe including
a first supply pipe,
a branch portion at which the first supply pipe is split,
a second supply pipe that couples the branch portion and one end of the sieve portion in a rotation axis direction,
a third supply pipe that couples the branch portion and the other end of the sieve portion in the rotation axis direction, and
an axis driver that shifts an axis of one of the first supply pipe and the branch portion with respect to an axis of the other;
a controller that controls an operation of the axis driver; and
an uneven distribution detector that detects unevenness of the material passing through the first supply pipe,
the controller controlling the operation of the axis driver based on a detection result obtained by the uneven distribution detector.