Image forming apparatus and convey control method for...

Details Image forming apparatus and convey control method for... Image forming apparatus and convey control method for...

2005-05-10

2005-05-10

Grimley, Arthur T. (Department: 2852)

Electrophotography

Cleaning of imaging surface

Having handling of removed material

Reexamination Certificate

active

06892045

ABSTRACT:
This invention relates to an image forming apparatus which employs a recycling scheme of recovering and reusing transfer residue toner, and a convey control method for recycle toner. In order to prevent a phenomenon such as fogging or character thickening, a toner recycle mechanism shares one driving source with a photosensitive body or fixing unit, and includes an electromagnetic clutch for switching driving force transmission to the recycling means when driving the photosensitive body or fixing unit, and a controller which controls power supply to the electromagnetic clutch. The convey control method for recycle toner includes the steps of starting copying, measuring a printing ratio of an image pattern per image, and suppressing a return amount of the recycle toner when the printing ratio of the image pattern is low.

REFERENCES:
patent: 5547795 (1996-08-01), Ochiai et al.
patent: 5712072 (1998-01-01), Inaba et al.
patent: 06242681 (1994-09-01), None
patent: 11084977 (1999-03-01), None
patent: 2002162879 (2002-06-01), None

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