Line feed mechanism for printer

Details Line feed mechanism for printer Line feed mechanism for printer

1975-04-07

1976-02-03

Burr, Edgar S.

Textiles: fiber preparation

197 1R, 197133R, 74354, 226 37, B41J 1992

Patent

active

039359387

ABSTRACT:
A line feed mechanism for use with high speed, lead screw driven printers, such as of the dot matrix type, utilizes a solenoid with a dual pivotal armature to effect the coupling of a uniquely mounted and eccentrically displaceable platen gear to a lead screw connected gear. As such, single or multiple platen controlled line feeding is effected in a manner which is correlated with the linear advancement of the carriage-mounted and lead screw-driven print head. The pivotal armature, when actuated, is also employed to hold a detent lever out of engagement with a ratchet wheel associated with the platen during multiple line feeding. This advantageously obviates the "clatter" sound otherwise generated, with but one solenoid being required for both variable line feeding and ratchet wheel release. As the stepping motor for the lead screw may be readily controlled for bi-directional rotation, so to may the silently operated platen be rotated, independently of carriage position, so as to allow various specialized printing and line scanning operations to be performed.

REFERENCES:
patent: 2168448 (1939-08-01), Pitman
patent: 3272303 (1966-09-01), Pohl
patent: 3428160 (1969-02-01), Barkdoll
patent: 3686974 (1972-08-01), Little
patent: 3804014 (1974-04-01), Thiene et al.

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