Typewriting machines – Sheet or web – Including friction-feed means
Patent
1985-08-20
1987-05-19
Pearson, Charles A.
Typewriting machines
Sheet or web
Including friction-feed means
4006454, 4006455, B41J 1303
Patent
active
046663223
ABSTRACT:
Disclosed is a record carrier feed device in which a guide bar is disposed in a position where the leading edge of a record carrier wound around a platen is on the point of separating from the cylindrical surface of the platen in a direction tangential thereto when the record carrier is to be fed past a printing region on the front side of the platen. The leading edge of the record carrier is guided along the guide bar to come into contact with guide rollers which are disposed on the proximal end side of the guide bar so that a fixed gap is defined between the guide rollers and the cylindrical surface of the platen. In the forward feed direction for the record carrier, the guide rollers rotate at a peripheral speed higher than that of the platen, exerting a frictional force in the forward feed direction on the record carrier. In the reverse feed direction, on the other hand, the guide rollers are kept from rotating, giving the record carrier a frictional force to pull back the same. The guide rollers are drivingly coupled to the platen, and a one-way clutch is provided between them for controlling the rotation of the guide rollers.
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IBM Technical Disclosure Bulletin vol. 27, No. 1A, Jun. 1984, pp. 137-138, "Platen Mounted-Exit Feed Roll and Magnifying Deflector Assembly" by Williams.
Brother Kogyo Kabushiki Kaisha
Pearson Charles A.
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