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Browse Prior Art Database

LASER INK JET

IP.com Disclosure Number: IPCOM000026062D
Original Publication Date: 1990-Feb-28
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 87K

Publishing Venue

Xerox Disclosure Journal

Abstract

Referring to Figure 1, a schematic end view of a thermal ink jet printing device 10 is shown. A laser beam 12 from laser 14 is passed through a beam splitter 16 and split into printing beam 18 and a drying beam 20. The printing beam is selectively reflected off of a polygon 22 and strikes the target area 24 of an ink channel 26 of printhead 34, thus selectively creating a heat source in the channel which forms the momentary bubble and ejects an ink droplet 28 towards the recording medium 30 on a rotatable drum platen 32. The ink is replenished via ink inlet 36 from an ink supply (not shown). The drying beam 20 is used to dry the ink printed on the recording medium.

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XEROX DISCLOSURE JOURNAL

LASER INK JET Classification Proposed Michael Carlotta U.S. C1.346/140R

Int. C1. Gold 15/18

I 30 \

c

16

FIG. 1

FIG. 2

XEROX DISCLOSURE JOURNAL - Vol. 15, No. 1 January/February 1990 9

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Page 2 of 2

LASER INK JET(Cont'd)

Referring to Figure 1, a schematic end view of a thermal ink jet printing device 10 is shown. A laser beam 12 from laser 14 is passed through a beam splitter 16 and split into printing beam 18 and a drying beam 20. The printing beam is selectively reflected off of a polygon 22 and strikes the target area 24 of an ink channel 26 of printhead 34, thus selectively creating a heat source in the channel which forms the momentary bubble and ejects an ink droplet 28 towards the recording medium 30 on a rotatable drum platen 32. The ink is replenished via ink inlet 36 from an ink supply (not shown). The drying beam 20 is used to dry the ink printed on the recording medium.

In Figure 2, an isometric view of a printhead 38 is shown comprising an anisotropically etched channel plate 40 having V-groove ink channels 42 which open through front face 44 to form nozzles 46 from which the ink droplets (not shown) are ejected. A quartz channel cover 48 enables efficient use of laser beam 50 to heat and form the droplet ejecting bubbles (not shown).

Some advantages of the laser ink jet shown in Figures 1 and 2 are: power may be varied to create different size droplets - grey scale heat so...