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:
Oct. 12, 1999
Filed:
Jul. 16, 1998
Applicant:
Inventors:
Hiroyasu Kato, Ibaraki-ken, JP;
Yasushi Kuratani, Ibaraki-ken, JP;
Assignee:
Riso Kagaku Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41F / ;
U.S. Cl.
CPC ...
101216 ; 74409 ; 74440 ;
Abstract
In a couple of axially engageable/disengageable gear wheels for driving a printing drum, in which each gear wheel has a duplicate construction including a primary gear for transmission of a power for driving the printing drum and an auxiliary gear for suppressing a backlash, the primary gear and the auxiliary gear are shifted relative to one another in the phase, except a predetermined meshing area, so that the two duplicate gear wheels are allowed to disengage from and re-engage with one another only when the two gear wheels are rotationally positioned at a predetermined rotational relationship.