Sheet misfeed and jam detection by measuring force exerted on fe

Details Sheet misfeed and jam detection by measuring force exerted on fe Sheet misfeed and jam detection by measuring force exerted on fe

1991-12-02

1994-08-02

Fuller, Benjamin R.

Photocopying

Contact printing

Light boxes

271258, 355209, G03G 2100

Patent

active

053350430

ABSTRACT:
An apparatus to detect sheet misfeeds and jams in an electrophotographic printing machine by measuring the tangential reaction force of a sheet entering the nip between two drive rolls and comparing the measured force with preprogrammed parameters within the machine controller. In the event the force measured does not fall within the programmed parameters, the drive motor controller and machine controller can take appropriate corrective action to display an error message, lessen sheet damage and prevent machine damage. A force library can be compiled to predict drive roll wear and failure so as to allow preventative measures to be taken.

REFERENCES:
patent: 3778051 (1973-12-01), Allen et al.
patent: 4166615 (1979-09-01), Noguchi et al.
patent: 4203586 (1980-05-01), Hoyer
patent: 4396187 (1983-08-01), Landa
patent: 4591145 (1986-05-01), Cherian

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