Photocopying – Including fiber optics
Patent
1985-07-02
1986-12-09
Moses, R. L.
Photocopying
Including fiber optics
198835, 474191, G03G 2100
Patent
active
046277021
ABSTRACT:
A self tracking web drive is provided wherein the roller with the friction drive in the center decouples all but a very limited width portion of the belt from the roller. By doing this, the flanges on a second roller cause the belt creep direction to reverse relative to the central high friction drive and move in the opposite direction.
Depending on the alignment of the roller axes, the belt will either walk slowly to one side, then to the other, or to walk to one side, retreat and gradually self-adjust to track close to the flange or just off it.
In fact, a thin driving high-friction area on one roll reduces the contact width between roller and belt and thereby tricks the wide belt into acting as if the width to pulley spacing was 10:1 or greater and becoming self tracking.
REFERENCES:
patent: 3308929 (1967-03-01), Shriver
patent: 4027966 (1977-06-01), Jordan
patent: 4174171 (1979-11-01), Hamaker et al.
patent: 4225036 (1980-09-01), Michael
patent: 4421228 (1983-12-01), Marsiglio et al.
Moses R. L.
Ricoh & Company, Ltd.
Ricoh Systems, Inc.
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