Bottom vacuum corrugation feeder stack height detection system c

Details Bottom vacuum corrugation feeder stack height detection system c Bottom vacuum corrugation feeder stack height detection system c

1989-04-27

1990-10-02

Kashnikow, Andres

Sheet feeding or delivering

Delivering to stack and feeding therefrom

With sheet sensor for selective location

271105, 271154, 73 1J, 377 8, B65H 522, G01C 2500, G06M 700

Patent

active

049602721

ABSTRACT:
A vacuum corrugation feeder stack height detection calibration system and method includes placing a single document in the document tray. Coupled to the stack height arm at the pivot point is a high resolution rotary encoder and dual beam sensor. The stack height arm is flipped up and then back down onto the document and pulses are counted. This difference in up and down pulses represents the "one sheet case." Software then stores this number in non-volatile memory and uses it to create a table of values for various document stack heights by adding constant values to the originally obtained "one sheet case" value.

REFERENCES:
patent: 4296406 (1981-05-01), Hamlin
patent: 4418905 (1983-12-01), Garavuso
patent: 4469320 (1984-09-01), Wenthe, Jr.
patent: 4489645 (1986-05-01), Tracy
Michael S. Doery, "Adaptive Algorithm for RDH's (ABC Equation)", Xerox Disclosure Journal, vol. 9, No. 6, Nov./Dec., p. 393(1984).

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