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

B - Operations, Transporting

41

J

B41J 15/04 (2006.01) B41J 2/48 (2006.01) B41J 11/00 (2006.01) B41J 29/48 (2006.01) B65H 26/00 (2006.01)

Patent

CA 2161858

This invention presents a recording unit using roll paper, especially a unit and method for easily and securely detecting a terminal end of roll paper rolled around a core inside a color printer. A roll paper terminal end detecting unit and method is provided for detecting the terminal end of roll paper rolled around the core inside the roll paper type recording unit, which is characterized in that 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 turning in contact with the roll paper surface and a spring for pressing the said 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.

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