Method, apparatus and thermal print ribbon to provide a protecti

Details Method, apparatus and thermal print ribbon to provide a protecti Method, apparatus and thermal print ribbon to provide a protecti

1987-10-30

1989-03-28

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Thermal

400240, 400697, 346 76PH, 219216, 427141, B41J 320

Patent

active

048158720

ABSTRACT:
Method and apparatus for the thermal transfer printing upon a record medium utilizing a print ribbon so as to form a protective transparent layer over a printed area upon a record medium. The thermal transfer print film includes plural colored ink regions separated by transparent ink regions. The method and apparatus of the present invention thus provide for the initial printing via thermal transfer of the colored ink regions onto an area of the record medium. Subsequent alignment of a region of the transparent ink with the printed area on the record medium and selective operation of thermal print heads thus thermally transfers portions of the thermal transparent ink to the previously colored ink printed area to provide a transparent ink layer over the printed information upon the record medium thereby protecting the same. The transparent ink layer thus serves to protect the colored ink printed information from abrasive rubbing and the like during processing and/or handling thereby preventing degradation of the print quality.

REFERENCES:
patent: 3942621 (1976-03-01), Karlan
patent: 4113392 (1979-09-01), Ploeger, jr.
patent: 4472479 (1984-09-01), Hayes et al.
patent: 4704615 (1987-11-01), Tanaka

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