Print band timing mark detector

Details Print band timing mark detector Print band timing mark detector

1986-02-28

1987-05-19

Sewell, Paul T.

Printing

Selective or progressive

Bed and platen machines

400146, 307354, 328150, B41J 120

Patent

active

046658203

ABSTRACT:
In the print band timing system described herein, the bipolar pulse generated in a sensor by the passage of a print band timing mark is applied to a discriminating circuit which compares the pulse signal with a voltage level substantially equal to the nominal d.c. level of the sensor signal. Hystereis is provided in one direction only so that the nominal zero crossing is precisely determined in a time position relationship.

REFERENCES:
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patent: 3718864 (1973-02-01), Kelly
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patent: 4406988 (1983-09-01), Scholz
patent: 4479430 (1984-10-01), Nakano
patent: 4480200 (1984-10-01), Tan
patent: 4609869 (1986-09-01), Metcalf
IBM Tech. Disc. Bulletin, by L. D. Richards, vol. 19, No. 9, Feb. 1977, pp. 3305-3306.
IBM Tech. Disc. Bulletin, by W. Sakmann, vol. 22, No. 5, Oct. 1979, p. 1938.

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