Electronic apparatus for detecting recording medium

Details Electronic apparatus for detecting recording medium Electronic apparatus for detecting recording medium

1991-01-02

1993-08-17

Nguyen, Phu K.

Typewriting machines

Sheet or web

Including friction-feed means

395101, 400 83, 4007081, G06K 1510, B41J 312

Patent

active

052376443

ABSTRACT:
A photocoupler consisting of a light emitting unit and a photo sensing unit is arranged at a predetermined position of a recording medium feeding path to thereby detect the presence or absence of the recording medium. The light emitting unit is driven by a drive signal having a predetermined signal format. A photo signal of the light emitting unit corresponding to the drive signal is detected by the photo sensing unit, thereby detecting the presence or absence of the recording medium. The recording medium is fed to a predetermined recording position on the basis of the detection of the recording medium.

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patent: 4727437 (1988-02-01), Mizoguchi

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