The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2001
Filed:
Apr. 19, 1999
Yoshio Ueda, Mihara, JP;
Hitoshi Hirose, Mihara, JP;
Norifumi Tasaka, Hiroshima, JP;
Masakazu Akatsuka, Hiroshima, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
Drag rollers disposed in a region from the paper feed side to the paper discharge side of a printing machine are driven one after another from the paper feed side with torque control, by which the slack of a web is removed successively from the upstream side of a web delivery running path. Also, a plurality of tension sensors for detecting a tension of a web between a feeder and a feed drag roller and between drag rollers disposed in a region from the paper feed side to the paper discharge side of a printing machine are provided, and a controller to which a tension detection signal from the plurality of tension sensors is supplied as a control signal is provided, by which slack of the web is removed and a predetermined preliminary tension is given to the web successively from the upstream side of a web running path by driving each drag roller with torque control based on the control signal from the controller at the start time of printing, and thereafter the driving of the drag roller at a location where the slack of the web has been removed is switched to speed control successively.