Clutchless paper advance mechanism

Details Clutchless paper advance mechanism Clutchless paper advance mechanism

1976-06-07

1977-11-22

Knowles, Allen N.

Advancing material of indeterminate length

By intermittent material-mover

With retrograde movement preventer

226165, 226167, B65H 1744

Patent

active

040592138

ABSTRACT:
The paper advance mechanism disclosed herein comprises two essentially identical paper-engaging devices, one fixed, one driven, which cooperate to incrementally advance the paper in a hand-held printing calculator. Each device includes a tapered cavity enclosing a roller which engages the paper as it passes therethrough. The position of the roller in the cavity determines whether that device slidably or non-slidably engages the paper and the position of the roller is determined by the movement of the paper itself. The paper-engaging devices alternately non-slidably engage the paper; when the driven device moves in one direction, it non-slidably engages and thus advances the paper as it moves, and the paper slides through the fixed device; when the driven device reverses direction, it slidably engages the paper as it returns to the start of its travel and the fixed device non-slidably engages the paper to hold the advanced paper in position.

REFERENCES:
patent: 2291065 (1942-07-01), Walker
patent: 2586536 (1952-02-01), Haller
patent: 2696380 (1954-12-01), Adams
patent: 2810573 (1957-10-01), Nadel
patent: 2953290 (1960-09-01), Kostenko
patent: 3556376 (1971-01-01), Offterdinger

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