Thickness sensor comprising a leaf spring means, and a light sen

Details Thickness sensor comprising a leaf spring means, and a light sen Thickness sensor comprising a leaf spring means, and a light sen

1992-01-29

1993-04-20

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250223R, 3350103, 400 56, G01N 2186

Patent

active

052045374

ABSTRACT:
A typical printing device has a document feeder, a printer, and a document transport mechanism for transporting documents from the document feeder to the printer. In accordance with the invention, there is provided a thickness measurer which measures the thickness of a document prior to the transport of the document to the printer, a controller which receives the thickness information and which provides a gap-adjustment signal, and an adjuster which receives the gap-adjustment signal and adjusts the gap accordingly.

REFERENCES:
patent: 4550252 (1985-10-01), Tee
patent: 4937460 (1990-06-01), Duncan et al.

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