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Browse Prior Art Database

NOVEL MARKING TECHNIQUE USING A LASER SCANNING SYSTEM

IP.com Disclosure Number: IPCOM000024325D
Original Publication Date: 1980-Apr-30
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 73K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to image-forming techniques utilizing a laser scanning system. As illustrated in one embodiment (Figure l), one technique utilizes high-energy, coherent light from a laser 10, which light is suitably modulated by a modulator 12. The modulated beam is scanned across a sheet of plain paper 14 or the paper is moved upward by way of example. A confined powder cloud of conventional low-melt toner 16 is supported such that an outlet opening including a seal 18 is contiguous with the paper. The spot size of the beam has the appropriate size (for resolution) so that a large number of spots are required to make up a character. The paper 14 and the wavelength of the light may be chosen so that either the light is totally absorbed within the thickness of the paper causing local heating or they can be chosen so that there is little absorption within the width of the paper. The powder cloud is arranged such that an appropriate amount of toner contacts the paper at the beam spot. In either case, the toner is made to fuse, either due to heating of the paper or the absorption of the transmitted beam by the toner.

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NOVEL MARKING TECHNIQUE USING A LASER SCANNING SYSTEM
James Maher
Walter Leising
Arthur North

Proposed Classification US. C1. 346/74
Int. C1. Gold 15/06

0-

ELECTRIC OR

MAGNETIC FIELD

I

TONER +

AIR SUPPLY

FIG. /

f/G. 2

This disclosure relates to image-forming techniques utilizing a laser scanning system. As illustrated in one embodiment (Figure l), one technique utilizes high- energy, coherent light from a laser 10, which light is suitably modulated by a modulator 12. The modulated beam is scanned across a sheet of plain paper 14 or the paper is moved upward by way of example. A confined powder cloud of conventional low-melt toner 16 is supported such that an outlet opening including a seal 18 is contiguous with the paper. The spot size of the beam has the appropriate size (for resolution) so that a large number of spots are required to make up a character. The paper 14 and the wavelength of the light may be chosen so that either the light is totally absorbed within the thickness of the paper causing local heating or they can be chosen so that there is little absorption within the width of the paper. The powder cloud is arranged such that an appropriate amount of toner contacts the paper at the beam spot. In either case, the toner is made to fuse, either due to heating of the paper or the absorption of the transmitted beam by the toner.

As shown in Figure 2 according to a second embodiment, the powder cloud of the embodiment of Figure 1 is replaced by a transparen...