Color offset detecting apparatus and method

Details Color offset detecting apparatus and method Color offset detecting apparatus and method

2005-07-19

2005-07-19

Brase, Sandra L. (Department: 2852)

Electrophotography

Image formation

Transfer

C347S116000

Reexamination Certificate

active

06920303

ABSTRACT:
An apparatus for forming a plurality of different color visual images on a photosensitive member is provided. A transfer medium driven by a driving roller and receives the plurality of different color visual images at a transfer section from the photosensitive member. The transfer medium superimposes and transfers the different color visual images to a transfer sheet a plurality of mark sets each formed from a set of different color marks (Bk, Y, M, C) aligned in a movement direction is formed on the transfer medium. Respective marks are detected by a sensor. An average of displacements of respective different color marks from a reference position is then calculated. The sensor is positioned being distanced from the transfer section by a prescribed length. The prescribed length is calculated by multiplying a conveyance length the transfer medium travels when the driving roller rotates once by an integer number.

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