Recording apparatus with detector for paper edge and end of ribb

Typewriting machines – Means auxiliary to typewriting function – Indicator means

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Details

400249, 400708, B41J 3536, B41J 3520, B41J 2944

Patent

active

051509776

ABSTRACT:
An image recording apparatus for recording to a recording medium comprises an ink sheet cassette to mount an ink sheet having an ink, a carriage to mount an ink sheet cassette, a platen to mount a recording medium, a recording head for transferring the ink of the ink sheet to the recording medium to thereby record to the recording medium, an alarm portion provided for the ink sheet in order to warn of the end of ink sheet in the cassette, and a sensor which is commonly used to detect both the size of recording medium set onto the platen and the alarm portion. The alarming portion is formed by adhering or printing a high reflectance material such as a metal foil to the end portion on the back surface of the ink sheet. When the carriage scans the recording medium or platen surface in the lateral direction, the carriage is shifted up together with the ink sheet and the photo sensor automatically detects the presence or absence of the recording sheet on the basis of the difference between the reflectances of the sheet and platen and can detect an image recording region. With this apparaatus, the image recording can be certainly executed with a high reliability at a low cost.

REFERENCES:
patent: 4272204 (1981-06-01), Quinn, Jr. et al.

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