Image forming apparatus and method of detecting index for use in image forming apparatus

Patent metadata

Field	Value
Publication number	US-8967372-B2
Application number	US-201213666645-A
Country	US
Kind code	B2
Filing date	Nov 1, 2012
Priority date	Nov 4, 2011
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

An image forming apparatus includes a belt, a detector, a determining section, a skew correcting section, and a storage section. The belt is stretched around rollers and provided with an index. The detector provides an output value. The determining section determines the index that is passing through the detection region on the basis of a change in the output value, the change exceeding a threshold. The skew correcting section performs control relating to skew correction of inclining the roller and correcting the position of the belt. The storage section stores the threshold having a value between the measured maximum amount of change in the output value when the skew correcting section inclines the roller at the maximum angle and the amount of change in the output value resulting from the index when the index arrives at or passes through the detector.

First claim

What is claimed is:

1. An image forming apparatus comprising:
an endless belt stretched and rotated around a plurality of rollers and provided with an index projecting from an edge of the belt;
a detector configured to be arranged so as to allow the edge of the belt and the index to pass through a detection region of the detector and configured to provide an output value that varies depending on a length of the detection region covered by the belt or the index;
a determining s…

Assignees

• Fujii Koji
• Kyocera Document Solutions Inc

Inventors

• Fujii Koji

Classifications

• G03G2215/00156

  Physics · mapped topic

• G03G2215/0132

  Physics · mapped topic

• G03G15/1615 Primary

  Physics · mapped topic