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. 06, 2004
Filed:
Nov. 07, 2002
Naoki Hirako, Ebina, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An image-forming apparatus allows duplex print to be performed using tabbed sheets. A plurality of paper sensors A, B, C, D, E, and F are installed on a paper output side of a paper tray in a direction perpendicular to a sheet transport direction. The location of a tab and the tab length in the transport direction are determined from a difference in timings of the rise or fall of output signals from the paper sensors A-F. When the tab is located on the leading edge of the sheet in the transport direction and does not traverse a transport control sensor X, operation timing of a device &agr; which is activated based on the timing of the rising of output signal from the transport control sensor X is advanced by an amount corresponding to the length of the tab . On the other hand, when the tab traverses the transport control sensor X, or when a sheet without a tab is used, the operation timing is not advanced. Accordingly, it becomes possible to determine an appropriate operation timing even when a sheet is inverted or reversed for duplex printing.