Patent Number:
6,293,453
Title:
Apparatus and method for controlling drag roller
Abstract:
An apparatus for and a method of controlling a drag roller in a printing machine to move a web with no shift of a printing position and enhance the printing quality remarkably, even when the drag roller varies in diameter due to its temperature change. From a given temperature-rotational-speed table, a controlling unit obtains a rotational speed of the drag roller so as to adjust a circumferential speed of the drag roller, which speed corresponds to the current circumferential surface temperature checked by a temperature monitor unit. Then, a rotational speed changing unit changes the rotational speed of the drag roller to a value equivalent to the rotational speed obtained by the controlling unit.
Inventors:
Hirose; Hitoshi (Hiroshima-ken, JP), Ueda; Yoshio (Hiroshima-ken, JP), Akatsuka; Masakazu (Hiroshima-ken, JP), Tasaka; Norifumi (Hiroshima-ken, JP)
Assignee:
Mitsubishi Heavy Industries, Ltd.
International Classification:
B41F 13/004 (20060101); B65H 23/188 (20060101); B65H 023/18 (); B65H 026/08 (); B28Q 015/12 ()
Expiration Date:
09/25/2018