Multi function sensing device for printing apparatus

Details Multi function sensing device for printing apparatus Multi function sensing device for printing apparatus

1996-12-31

1998-12-01

Burr, Edgar S.

Typewriting machines

Means auxiliary to typewriting function

Indicator means

400582, B41J 2942

Patent

active

058428003

ABSTRACT:
A printing apparatus is disclosed which has various operating components, and which includes a single sensing means for sensing certain operational characteristics of the operating components to monitor the operational status thereof for the purpose of either providing an operator perceptible indication that a certain operational characteristic of one of the operating components is not in a condition for normal operation of the printing apparatus. The single sensing means includes a photo detecting means mounted on the inside surface of the cover of a housing for the operating characteristics of the printing apparatus, and an actuating means mounted on an ink cartridge which is mounted on and movable with a moving print head, such that the sensing means can provided an ink dication of whether the cover is open or closed, whether the ink cartridge is present or absent, whether the print head is in a proper position for commencing a normal cycle of operation, and in one variation of an alternate embodiment of the invention, whether there is sufficient ink in the ink cartridge for normal operation of the printing apparatus, and in another variation thereof, how much ink is in the ink cartridge at all times between full and insufficient for normal operation of the printing apparatus.

REFERENCES:
patent: 4184781 (1980-01-01), Ota
patent: 5531530 (1996-07-01), Kuramoto et al.
patent: 5644348 (1997-07-01), Shimoyama et al.

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