Belt unit

Details Belt unit Belt unit

1999-05-07

1999-11-23

Lee, Susan S. Y.

Electrophotography

Image formation

Photoconductive member

198806, G03G 1500

Patent

active

059915757

ABSTRACT:
A belt unit has a drive roller, a driven roller, and a tension roller. An endless belt is mounted about the drive roller, driven roller, and tension roller. When the drive roller is driven by a motor, the endless belt runs with a print medium placed thereon. The tension roller longitudinally extends in a direction perpendicular to the direction in which the belt runs. First and second support members are pivotally mounted on a frame and support the tension roller between the first and second supports. The spring urges the support members so that the tension roller exerts tension on the belt. A coupling member such as a rod, wire, and plate couples the first support member to the second support member, so that a first pivotal movement of one of the first and second support members causes a second pivotal movement of the other of the first and second support members, the first and second pivotal movements applying a substantially same urging force to the belt.

REFERENCES:
patent: 4087169 (1978-05-01), Fantuzzo
patent: 4170175 (1979-10-01), Conlon, Jr.
patent: 4174171 (1979-11-01), Hamaker et al.
patent: 4183658 (1980-01-01), Winthaegen
patent: 4626095 (1986-12-01), Berger
patent: 5343279 (1994-08-01), Nagata et al.
patent: 5481338 (1996-01-01), Todome
patent: 5659851 (1997-08-01), Moe et al.

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