Variable bottom-edge margin indicator and method for typewriter

Details Variable bottom-edge margin indicator and method for typewriter Variable bottom-edge margin indicator and method for typewriter

1975-07-15

1977-03-29

Burr, Edgar S.

Textiles: fiber preparation

197192, B41J 2944

Patent

active

040144275

ABSTRACT:
This disclosure deals with variable bottom-edge margin indication for typewriter paper and the like in which the sensor-monitoring of the bottom edge of a side margin of the paper is disposed at variably calibratingly adjustable regions, preferably near a side end, of the platen, with ready external calibration control thereof and momentary bell alarm upon the reaching of the preset bottom edge margin.

REFERENCES:
patent: 531893 (1895-01-01), Ashby
patent: 815644 (1906-03-01), Shea
patent: 1656491 (1928-01-01), Maulme
patent: 2595178 (1952-04-01), Stricklin
patent: 2675904 (1954-04-01), Maurer
patent: 2689033 (1954-09-01), Grenier
patent: 2879876 (1959-03-01), Palmer et al.
patent: 2914160 (1959-11-01), Pohl et al.
patent: 3091321 (1963-05-01), Ashworth
patent: 3276562 (1966-10-01), Mathews

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