Tandem-type image forming apparatus and image forming condition

Details Tandem-type image forming apparatus and image forming condition Tandem-type image forming apparatus and image forming condition

1998-09-28

1999-11-02

Beatty, Robert

Electrophotography

Control of electrophotography process

Of plural processes

399 15, 399 51, 399 66, G03G 1501, G03G 1514

Patent

active

059786159

ABSTRACT:
Using an image forming apparatus, toner images are respectively formed on photosensitive drums of image forming units set along a transport belt, and the toner images are transferred onto the transport belt or a recording sheet transported on the transport belt to form a color image. The image forming apparatus is composed of a first density detecting sensor for detecting a density of a toner image formed on the recording sheet or the transport belt at the upstream side of each transfer position of at least one image forming unit which is located at the downstream side of a first image forming unit in a transport direction of the transport belt and which is selected as a subject of an image forming condition determination, a second density detecting sensor for detecting a density of the toner image formed on the recording sheet or the transport belt at the downstream side of the transfer position, and an image forming condition determining unit for comparing a detection value given by the first density detecting sensor with a detection value given by the second density detecting sensor and for determining an image forming condition in accordance with the comparison result for an image formation performed by the image forming unit selected as the subject.

REFERENCES:
patent: 5294959 (1994-03-01), Nagao et al.
patent: 5576811 (1996-11-01), Kobayashi et al.
patent: 5754919 (1998-05-01), Sugimoto et al.
patent: 5774762 (1998-06-01), Takemoto et al.

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