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:
Dec. 04, 2001
Filed:
Feb. 22, 1999
Ichiro Sasaki, Toride, JP;
Mitsuo Nimura, Kashiwa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A sheet perforation device for use in an image forming apparatus eliminates inconveniences such as imperfect punching due to too small a sheet size and completion of image formation without notifying the user that the punching could not be performed despite the user's instruction for punching. Punching setup is made and a starting instruction is given through an operating section. Based on the relationship between a selected sheet size and the spacing of holes to be formed by a punching unit, a determination is made as to whether the punching can be correctly performed, and, if it has been determined that the correct punching will fail, a warning message is displayed on the operating section. If the user gives a starting instruction again after recognizing the warning message, image forming operation is started while the punching setup is automatically canceled.