Title:
BELT EDGE DETECTION CORRECTING MECHANISM AND COLOR IMAGE FORMING APPARATUS
Document Type and Number:
Japanese Patent JP3245602
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a belt edge detection correcting mechanism capable of obtaining a high quality color image even in the case a photosensitive belt edge has ruggedness such as a flaw.
SOLUTION: The belt edge detection correcting mechanism comprises belt edge detectors 4a-4d disposed on the photosensitive belt 1 rear surface at the photosensitive belt 1 end part for detecting the photosensitive belt 1 end by a laser beam from laser units 5a-5d, and a control part for calculating the time of a laser beam incident on the edge detectors 4a-4d being blocked by the photosensitive belt 1 end for the first time as a count value, and in the case the count value differs from the count value immediately before, outputting a new count value obtained by adding or subtracting a predetermined value from the count value as a corrected belt edge signal to be the reference for starting the scan of a laser beam based on the image information.
Inventors:
Tadashi Kawase
Application Number:
JP33809098A
Publication Date:
January 15, 2002
Filing Date:
November 27, 1998
Export Citation:
Assignee:
NEC
International Classes:
H04N1/29; B41J2/44; B41J2/525; G02B26/10; G03G15/01; G03G21/14; (IPC1-7): B41J2/44; B41J2/525; G03G15/01; G03G21/14
Domestic Patent References:
| JP4153675A | ||||
| JP9101642A |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)