Contact type paper counter

Details Contact type paper counter Contact type paper counter

1989-03-13

1990-11-27

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Counting animate or inanimate entities

235 98B, G06M 700

Patent

active

049742370

ABSTRACT:
A contact sensor apparatus counts associated sheet products as they pass over a generally planar surface. a vacuum source draws a bottom surface of a sheet product onto the planar surface. A contact member is selectively deflected through engagement with the sheet product and deflects upwardly at the passage of the trailing edge of the sheet product. The contact member is connected to a sheet of piezoelectric material that is distorted upon deflection of the contact member. This produces an electrical charge representative of passage of paper over the sensor apparatus.

REFERENCES:
patent: 1544860 (1925-07-01), Reisbach
patent: 1557944 (1925-10-01), Reisbach
patent: 3571574 (1971-03-01), Gerber
patent: 3746841 (1973-07-01), Fenske
patent: 3813522 (1972-05-01), McCarthy
patent: 3862402 (1975-11-01), Igarashi
patent: 3983367 (1976-09-01), Kondo et al.
patent: 4139765 (1979-02-01), Pomey
patent: 4481667 (1984-11-01), Price et al.
patent: 4539470 (1985-09-01), Honegger et al.

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