Browse Prior Art Database

Thermal Printer

IP.com Disclosure Number: IPCOM000075018D
Original Publication Date: 1971-Jul-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Damm, EP: AUTHOR

Abstract

A method and apparatus are shown for accomplishing nonimpact printing by transfer of selectively liquified ink to paper. Porous roller 10 (e.g. sintered nylon) contains interiorly a supply of ink solution 12, which varies between solid and liquid states with suitable temperatures (e.g. polyethylene glycol of proper molecular weight filled with dye).

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Thermal Printer

A method and apparatus are shown for accomplishing nonimpact printing by transfer of selectively liquified ink to paper.

Porous roller 10 (e.g. sintered nylon) contains interiorly a supply of ink solution 12, which varies between solid and liquid states with suitable temperatures (e.g. polyethylene glycol of proper molecular weight filled with dye).

Clockwise rotation of the drum passes the liquified surface ink through cooling station 14 where it is solidified by cooling. Further rotation brings the surface ink to imaging station 16 where it is selectively heated image-wise in spots (e.g. by row of light emitting diodes or diffraction limited scanned laser beam) and thereby reliquified in image form. Paper web 18 fed in synchronism with the drum receives the reliquified ink image.

Options include placement of the image heater system behind the path of traverse of the paper, and provision of a remelt heater 20 to speed reliquification of the remaining surface ink on the drum for continuous replenishment. Roller 10 may be included as an element of a replaceable ink cartridge.

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