Browse Prior Art Database

Thermal Printer

IP.com Disclosure Number: IPCOM000077164D
Original Publication Date: 1972-Jun-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Harris, TJ: AUTHOR [+3]

Abstract

In the thermal printer of the figure, standard white paper 10 transported between supply and take-up rolls 11, 12 is back heated in image spots by image modulated spot focussed laser beam 14. The radiant energy of the spot focussed laser beam is conducted through a buffering layer 16 of KAPTON* Type H polyimide film, to effect fusion in image patterns of toner loosely adhered to the paper in a uniform distribution. The toner is supplied by reservoir/aerosol dispersion system 16. The laser energy is passed through the thermally absorptive layer 16 and the paper, heating both in substantial conformance with the transmitted image pattern of the beam. The heat fuses the charged toner particles to the paper in finely resolved print images.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 60% of the total text.

Page 1 of 2

Thermal Printer

In the thermal printer of the figure, standard white paper 10 transported between supply and take-up rolls 11, 12 is back heated in image spots by image modulated spot focussed laser beam 14. The radiant energy of the spot focussed laser beam is conducted through a buffering layer 16 of KAPTON* Type H polyimide film, to effect fusion in image patterns of toner loosely adhered to the paper in a uniform distribution. The toner is supplied by reservoir/aerosol dispersion system 16. The laser energy is passed through the thermally absorptive layer 16 and the paper, heating both in substantial conformance with the transmitted image pattern of the beam. The heat fuses the charged toner particles to the paper in finely resolved print images.

The unique heat absorptive properties of the KAPTON permits controlled delivery of heat energy to spot areas of the paper, assuring uniform heating of the paper and toner and formation of stable and consistent fusion bonds. This cannot be accomplished as effectively by direct frontal heating of the toner, since excessive heat causes the toner to sublime (hence vanish) and heated toner will not fuse uniformly to cold standard paper.

The heat absorptive layer 16 is transported with the paper, either as a web, as shown in the illustration, or in an endless belt configuration. Experimental data indicates, that a thickness of 0.001 inch of KAPTON (paper thickness and color is noncritical) and a collimated laser beam deliv...