Cartridge for cooling a thermal print head

Details Cartridge for cooling a thermal print head Cartridge for cooling a thermal print head

1996-02-21

1997-07-15

Hilten, John S.

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

400207, 347223, B41J 3528

Patent

active

056476787

ABSTRACT:
A dye donor cartridge (17) for a thermal printer (10) is disclosed. Uniformity of the image intensity in the thermal print head (12) is achieved by carefully controlling an ambient temperature of the print head. This control of ambient temperature is achieved with an air flow arrangement, wherein air is supplied to the dye donor cartridge (17), and through cartridge vents (54) to print head heatsink (15). In one embodiment of the invention, cartridge vents (54) vary in size to provide extra cooling to portions of the printhead assembly (12) to maintain a substantially uniform temperature along its length.

REFERENCES:
patent: Re33260 (1990-07-01), Stephenson
patent: 4973983 (1990-11-01), Yamamoto et al.
patent: 5176458 (1993-01-01), Wirth
patent: 5374944 (1994-12-01), Janosky et al.
patent: 5519429 (1996-05-01), Zwijsen et al.

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