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.:

US 9256177 B1

Date of Patent:

Feb. 09, 2016

Filed:

Sep. 03, 2013

Image forming apparatus with a cam configured to change a pressurizing force applied to a rotation member, and a control unit configured to control a motor speed for driving the cam

Applicant:

Canon Kabushiki Kaisha, Tokyo, JP;

Inventor:

Tatsuhito Watanabe, Toride, JP;

Assignee:

Canon Kabushiki Kaisha, Tokyo, JP;

Attorney:

Canon U.S.A., Inc. IP Division

Primary Examiner:

Clayton E LaBalle

Assistant Examiner:

Peter L Cheng

Int. Cl.

CPC ...

G03G 15/20 (2006.01);

U.S. Cl.

CPC ...

G03G 15/2067 (2013.01); G03G 15/2032 (2013.01);

Abstract

A fixing device causes an eccentric cam to perform a rotation step of 113° to shift from a pressurization releasing mode to a pressurization mode, and causes the eccentric cam to perform a rotation step of 263° to shift from a standby mode to the pressurization mode. A control unit activates a motor by setting a rotational speed of a rotational magnetic field of a stator to 600 rpm in the rotation step of 113° and to 1500 rpm in the rotation step of 263° so as to prevent the eccentric cam from receiving acceleration of a rotational direction from a pressure lever before a rotational speed of a rotor reaches a first rotational speed. Then, the control unit stops the rotational magnetic field of the stator based on an output of a photo interrupter.

Find Patent Forward Citations

Watanabe, Tatsuhito. (2016). Image forming apparatus with a cam configured to change a pressurizing force applied to a rotation member, and a control unit configured to control a motor speed for driving the cam (U.S. Patent No. 9256177). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9256177

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile