Roll paper terminal end detecting unit and method

Details Roll paper terminal end detecting unit and method Roll paper terminal end detecting unit and method

1995-10-06

1998-06-02

Burr, Edgar S.

Typewriting machines

Means auxiliary to typewriting function

Indicator means

400703, 242563, B41J 2946

Patent

active

057589828

ABSTRACT:
A recording/printing unit using roll paper, and method for easily and securely detecting the terminal end of roll paper rolled around a core inside a color printer. The outside face of said core is darker than the roll paper. A sensor is provided for detecting the intensity of reflected light. A pinch roller is provided turning in contact with the roll paper surface and a spring is provided for pressing the pinch roller against the surface of roll paper, and for detecting the terminal end of roll paper by the change in the intensity of reflected light.

REFERENCES:
patent: 3635417 (1972-01-01), Kajiwara et al.
patent: 4019618 (1977-04-01), Busch
patent: 4893763 (1990-01-01), Wales et al.
patent: 5197688 (1993-03-01), Giorgio et al.
Beistle, "Arrangement ofr Detectin A Web or Tape Wrapped on A Hub", IBM Technical Disclosure Bulletin, vol. 23, No. 4 Sep. 1980.

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