Image forming apparatus which reduces or eliminates density irre

Details Image forming apparatus which reduces or eliminates density irre Image forming apparatus which reduces or eliminates density irre

1993-06-08

1994-04-05

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118656, 118657, 355208, 355211, 355251, G03G 1506

Patent

active

053009878

ABSTRACT:
An image bearing member of an image forming apparatus is heated both during an image forming operation and during an inoperative condition. At least two developing sleeves are opposed to the image bearing member. An angular difference between an angle by which one of the developing sleeves is rotated until any point on the image bearing member reaches a first position where a distance between the one developing sleeve and the image bearing member is minimum, and an angle by which the other developing sleeve is rotated until the point on the image bearing member reaches a second position where a distance between the other developing sleeve and the image bearing member is minimum, becomes (2.pi./S).times.k (rad.), where S is the number of the developing sleeves and k is an integral number excluding multiples of S.

REFERENCES:
patent: 5019862 (1991-05-01), Nakamura et al.
patent: 5066988 (1991-11-01), Miyake

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