Arrangement for position indication of an edge of a sheet-shaped

Details Arrangement for position indication of an edge of a sheet-shaped Arrangement for position indication of an edge of a sheet-shaped

1989-05-10

1990-07-24

Burr, Edgar S.

Typewriting machines

Means auxiliary to typewriting function

Indicator means

400708, B41J 2942, B41J 2946

Patent

active

049431749

ABSTRACT:
A lever projects into the space between two guide plates for a sheet data carrier and is journalled so as to upwardly pivotable in the transport direction of the carrier against the force of a spring. A Hall-element sensor is secured adjacent to a magnet secured to the journalled end of the lever so that the sensor is activated by translation or rotation of the lever effected by engagement of the lever with the feeding of the data carrier. The lever is arranged to initially translate to activate the sensor and rotated after the translation so that when the lever is returned to its position prior to translation, only rotation of the lever switches the state of the sensor to indicate the position of the trailing edge of the carrier.

REFERENCES:
patent: 3888478 (1975-06-01), Alderman, Jr. et al.
patent: 3924848 (1975-12-01), Murakami
patent: 4354766 (1982-10-01), Hendrischk et al.
patent: 4579056 (1986-04-01), McGourty et al.
patent: 4793605 (1988-12-01), Tajima

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