Multi-image forming apparatus having registration error correcti

Details Multi-image forming apparatus having registration error correcti Multi-image forming apparatus having registration error correcti

1994-12-16

1995-09-19

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

347116, G03G 1500

Patent

active

054520738

ABSTRACT:
An image forming apparatus includes plural imaging stations each having an image forming unit positioned around a photosensitive drum, a transfer belt for transporting a recording sheet, a pattern forming unit for causing the image forming unit of each imaging station to form registration correcting marks of plural sets on the transfer belt at predetermined timings, a reader unit for reading the registration correcting marks formed on the transfer belt, a calculation unit for applying a predetermined calculation to the data read from the registration correcting marks on the transfer belt, a memory for storing the result of calculation for respective colors, and a correcting unit for mechanically or electrically correcting the registrations of the imaging stations by analysis of the data stored in the memory.

REFERENCES:
patent: 4903067 (1990-02-01), Murayama et al.

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