Color thermal printing method and device capable of preventing u

Details Color thermal printing method and device capable of preventing u Color thermal printing method and device capable of preventing u

1992-10-28

1995-03-14

Fuller, Benjamin R.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Multicolor

346 76R, B41J 232, B41J 235, B41J 2355, B41M 528

Patent

active

053980506

ABSTRACT:
A thermosensitive color recording material is provided having cyan, magenta, and yellow thermosensitive coloring layers formed on a supporting material in this order. As a thermosensitive coloring layer is positioned deeper within the recording material, which corresponds to a lower heat sensitivity thereof, a larger heat energy for coloring is required. The high density area of the yellow thermosensitive color layer overlaps with the low density area of the magenta thermosensitive coloring layer, and the high density area of the magenta thermosensitive color layer overlaps with the low density area of the cyan thermosensitive coloring layer. In coloring the yellow thermosensitive coloring layer, it is necessary to prevent the underlying magenta thermosensitive coloring layer from developing color. To this end, a pulse train including one bias pulse and a plurality of image pulses is divided into a plurality of subsidiary pulse trains, in order to generate a heat energy lower than the coloring heat energy necessary for obtaining a desired density. The subsidiary pulse trains are supplied to the thermal head at a slight time delay interval or in a manner which allows a sequential frame recording. Likewise, the thermal recording of the magenta thermosensitive coloring layer is performed for a plurality of times.

REFERENCES:
patent: 4833488 (1989-05-01), Mizutani et al.
patent: 5216438 (1993-06-01), Nakao et al.

Affiliated with

Also associated with

Rating

Color thermal printing method and device capable of preventing u does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Color thermal printing method and device capable of preventing u, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color thermal printing method and device capable of preventing u will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-715642