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Browse Prior Art Database

Thermal Paper Printer

IP.com Disclosure Number: IPCOM000047921D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Fowler, KJ: AUTHOR [+2]

Abstract

An electrothermal printer is described in which printing is accomplished by an electrothermal ribbon operating in contact with thermally sensitive paper. The printer utilizes an electrothermal ribbon 1 in contact with thermally sensitive paper 2. Ribbon 1 comprises a resistive layer 3 and a conductive layer 4. A styli assembly 5 is mounted in contact with resistive layer 3, and individual ones of styli 5 are momentarily energized by being temporarily coupled by switches 6 to a voltage source 7 so that a circuit through contact plate 8 and conductive layer 4 is formed to heat a small discrete area of ribbon 1. Each discrete area of the ribbon 1, as so heated, causes a discrete area 12 of the paper 2 to change color.

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Thermal Paper Printer

An electrothermal printer is described in which printing is accomplished by an electrothermal ribbon operating in contact with thermally sensitive paper. The printer utilizes an electrothermal ribbon 1 in contact with thermally sensitive paper 2. Ribbon 1 comprises a resistive layer 3 and a conductive layer 4. A styli assembly 5 is mounted in contact with resistive layer 3, and individual ones of styli 5 are momentarily energized by being temporarily coupled by switches 6 to a voltage source 7 so that a circuit through contact plate 8 and conductive layer 4 is formed to heat a small discrete area of ribbon 1. Each discrete area of the ribbon 1, as so heated, causes a discrete area 12 of the paper 2 to change color. By producing relative motion between the ribbon 1, paper 2 and styli assembly 5 as individual stylii are coupled to voltage source 7, patterns such as the character 9 can be formed. The usage of ribbon 1 can be reduced by making the rate of relative movement of ribbon 1 past the styli assembly 5 (as shown by arrow 10) less than the rate of relative movement of paper 2 past the styli assembly (as shown by arrow 11).

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