In-stack sheet thickness measuring system

Details In-stack sheet thickness measuring system In-stack sheet thickness measuring system

2005-03-04

2008-08-12

Epps, Georgia Y. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C250S559360, C271S148000

Reexamination Certificate

active

07411205

ABSTRACT:
A system and method of estimating the thickness of the individual sheets in a stack of sheets in a print media sheet input stacking tray before printing with an electronic sensing system for electronically detecting individual sheet edges in the stack thereof and a movement system providing a known traversal distance of the sheet edge sensing system relative to one side of the stack to produce multiple signals corresponding to multiple detected individual sheet edges, and dividing that multiplicity of signals into the known traversal movement to estimate the thickness of the individual print media sheets in the stack and provide a corresponding electrical output can be used for automatic control of sheet feeder, printer or finisher functions. A relatively simple contacting or non-contacting sensor may be used.

REFERENCES:
patent: 5673907 (1997-10-01), Rumsey et al.
patent: 7267337 (2007-09-01), Moore et al.

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