Document transport device

Details Document transport device Document transport device

1997-12-15

1999-07-13

Beatty, Robert

Electrophotography

Document handling

Original

271 7, 399373, G03G 1500

Patent

active

059239417

ABSTRACT:
This invention relates to a document transport device for use in an image forming apparatus. The document transport device has a first belt roller disposed above a document positioning member. A second belt roller is disposed away from the first belt roller in the document transport direction. An endless belt is wound around the first and second belt rollers. Plural presser rollers are arranged on a specified position between the first and second belt rollers to press the belt against a contact glass. The document transport device has a tension roller between the first belt roller and the presser roller closest thereto to apply a tension force to the belt so as to set the belt at the lowermost position of the tension roller below a common tangential line to the circumferences of the first belt roller and the presser roller and apart from the contact glass.

REFERENCES:
patent: 4954847 (1990-09-01), Murata et al.
patent: 4975749 (1990-12-01), Tsunoda et al.
patent: 5532847 (1996-07-01), Maruyama
patent: 5587782 (1996-12-01), Johdai et al.
patent: 5599014 (1997-02-01), Kitahara et al.
patent: 5680203 (1997-10-01), Kobayashi et al.

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