Line spacing mechanism for printing machines

Details Line spacing mechanism for printing machines Line spacing mechanism for printing machines

1984-09-17

1986-11-11

Burr, Edgar S.

Typewriting machines

For line-spacing by incremental rotation of platen

By irregular increments of platen rotation

400551, 400567, 400564, 74409, 74425, B41J 1996, B41J 1914, F16H 5518, F16H 116

Patent

active

046219331

ABSTRACT:
A line spacing mechanism for printing machines comprises an electric motor which is operable to rotate selectively in either direction. A worm on the shaft of the motor meshes with a helicoidally toothed wheel to cause a platen roller to rotate in the clockwise direction or the anticlockwise direction. The motor is support pivotally by trunions and urged by a spring to eliminate radial play between the worm and toothed wheel. Another spring, lever and ball apply thrust to the motor shaft to take up axial play in its bearing, i.e. between the worm and the motor.

REFERENCES:
patent: 2173660 (1939-09-01), Perkins
patent: 3339426 (1967-09-01), Borggrafe
patent: 3387081 (1968-06-01), Kleinschmidt et al.
patent: 3848477 (1974-11-01), Giandinoto et al.
patent: 3866486 (1975-02-01), Lechner
patent: 3888340 (1975-06-01), Hoffman
patent: 3915281 (1975-10-01), Blomquist et al.
patent: 4040307 (1977-08-01), Koster
patent: 4112344 (1978-09-01), Klein
IBM Tech. Disc. Bulletin, "Electromechanical Variable-Index System", Klein, vol. 17, No. 4, Sep. 1974, pp. 959-960.

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