Typewriting machines – For line-spacing by incremental rotation of platen – For line-spacing in forward or reverse direction
Patent
1984-06-21
1985-07-30
Burr, Edgar S.
Typewriting machines
For line-spacing by incremental rotation of platen
For line-spacing in forward or reverse direction
400568, 400572, B41J 1914, B41J 1980
Patent
active
045318506
ABSTRACT:
A line spacing device for printing machines comprises an electric motor arranged to rotate selectively in a clockwise direction and anticlockwise direction and a control disc carrying a pawl on an eccentric. The tooth of the pawl describes a closed trajectory engaging in the teeth of a wheel and of a sense the same as the rotation of the disc, whereby a paper support platen is rotated by one increment in the opposite sense. A central control unit controls the clockwise and anticlockwise rotations of the electric motor. A cam disengages a detent pin from the wheel so that the motor is only lightly loaded when actuating the platen.
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IBM Technical Disclosure Bulletin, "Line Feed Mechanism", vol. 9, No. 11, Apr. 1967, pp. 1622-1623, article by Robison.
Musso Pietro
Valle Franco
Burr Edgar S.
Ing. C. Olivetti & C. S.p.A.
Pearson Charles A.
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