Apparatus for feeding recording paper forwardly and backwardly

Details Apparatus for feeding recording paper forwardly and backwardly Apparatus for feeding recording paper forwardly and backwardly

1988-03-02

1990-06-19

Burr, Edgar S.

Typewriting machines

For line-spacing by incremental rotation of platen

For line-spacing in forward or reverse direction

400616, 400618, B41J 1914

Patent

active

049348493

ABSTRACT:
An apparatus for feeding recording paper forwardly and backwardly in a printing apparatus comprising a pair of paper feed devices, one on each side of a printing unit. The upstream paper feed device is lower in forward feed speed than the downstream paper feed device. The apparatus includes a larger- and a smaller-diameter gear portions provided integrally on a drive gear wheel which transmits a drive force to the upstream paper feed device. A reverse-feed gear wheel, mounted on the drive shaft, meshes with the larger-diameter gear portion via a one-way clutch. A forward-feed gear wheel, loosely fitted over the drive shaft, meshes with the smaller-diameter gear portion. A clutch spring, wound around the outer periphery of the shaft of the forward feed gear wheel and a seat coupled to the drive shaft, is engaged with a rotary body with a one-way clutch.

REFERENCES:
patent: 4360279 (1982-11-01), Sugiura
patent: 4606663 (1986-08-01), Christoph et al.

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