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:
Jul. 16, 1991
Filed:
Apr. 21, 1989
Applicant:
Inventors:
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ; G03G / ;
U.S. Cl.
CPC ...
355 68 ; 355 69 ; 355 75 ; 355311 ;
Abstract
A scanner starts to move for preliminary scanning and an exposure lamp of the scanner turns on after a prescribed period after the start of the movement of the scanner. When a rear edge of an original of the minimum size placed on a platen is irradiated by the scanning, an amount of irradiation of the exposure lamp attains a prescribed amount since the prescribed period has passed from the turn-on thereof. Accordingly, insufficiency of an irradiation amount of the exposure lamp does not occur at the time of original size detecting operation. Thus, detection operation is speeded up and the first copy speed of the image forming apparatus is improved.