公开(公告)号：US11118306B2

公开(公告)日：2021-09-14

申请号：US16366082

申请日：2019-03-27

申请人： Seiko Epson Corporation

发明人： Sadaharu Komori

IPC分类号： D21F7/06 ,  D21F1/80 ,  D21F9/00 ,  D21B1/10

摘要： A web forming device includes: a defibrator having a variable speed rotor, and configured to defibrate defibration feedstock by rotation of the rotor; an accumulator on which defibrated material defibrated by the defibrator accumulates; a thickness detector configured to detect a thickness of the defibrated material accumulated on the accumulator; and a controller configured to control a rotational velocity of the rotor based on a detection result from the thickness detector. The controller applies either or both a first control and a second control, the first control decreasing the rotational velocity of the rotor when variation in the thickness of the deposited defibrated material detected by the thickness detector exceeds a first tolerance, and the second control increasing the rotational velocity of the rotor when a slope of change over time in a thickness of the deposited defibrated material detected by the thickness detector is less than a second tolerance.

公开(公告)号：US11293139B2

公开(公告)日：2022-04-05

申请号：US16676533

申请日：2019-11-07

申请人： SEIKO EPSON CORPORATION

发明人： Hirofumi Nakata ,  Kazuma Miyazawa ,  Sadaharu Komori ,  Masahide Nakamura ,  Yuki Oguchi ,  Soichiro Seo ,  Yoshiyuki Nagai

IPC分类号： B21B1/10 ,  D21B1/10 ,  D21B1/06

摘要： A web manufacturing apparatus includes a defibration section that includes a rotating blade and is configured to defibrate a material containing fiber, a detection section configured to detect an electric charge amount of a defibrated material obtained by the defibration section, and a control section configured to control operation of the defibration section. The control section includes a first mode in which a revolution speed of the rotating blade is set based on a detection result of the detection section.