Line-spacing device for a typewriter or the like

Details Line-spacing device for a typewriter or the like Line-spacing device for a typewriter or the like

1990-07-03

1991-10-15

Burr, Edgar S.

Typewriting machines

For line-spacing by incremental rotation of platen

To facilitate condensed billing

400551, 400904, B41J 1151

Patent

active

050569430

ABSTRACT:
In a line-spacing device for a typewriter or the like, where a platen, used as a support for the paper, is moved forward in steps by means of a ratchet it is provided for attaining a half-step transport that the gripper point (20) is seated longitudinally displaceable on the ratchet (11) in a direction approximately tangential to the toothed wheel (4) between two end positions determined by detent forces, where the detent force of the gripper point (20) is less than the force of resistance opposed by the toothed wheel (4) with the platen (1) to the drive by means of the gripper point (20) in the course of the tangential transport phase, and where the distance between the two detent end positions in the longitudinal direction corresponds to the tangential transport distance of a half transport step (t).

REFERENCES:
patent: 4531850 (1985-07-01), Valle et al.
IBM Technical Disc. Bulletin, vol. 9 No. 11 4/67 "Line Feed Mechanism".

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