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:
May. 18, 2004
Filed:
Jan. 18, 2001
Hiroshi Chihara, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes a guide unit for guiding sheets fed by a sheet feed unit to an image forming unit, a discharge guide unit for discharging the sheets onto which images are formed, by the image forming unit, a re-transportation guide unit for branching the sheets from the discharge guide unit and guiding them through the image forming apparatus again, and a plurality of sheet sensors disposed in the re-transportation guide unit at intervals in a sheet transportation direction for determining positions at which the sheets are placed in a standby state, wherein the number of sheets, which are placed in the standby state is selected based on sheet size information so that more sheets are placed in the standby state when a sheet size is short than when it is long. Accordingly, the throughput of short sheets can be increased when images are recorded on both sides thereof.