Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

HYBRID THERMALRIOT MELT INK JET PRINTHEAD

IP.com Disclosure Number: IPCOM000026943D
Original Publication Date: 1994-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 8 page(s) / 427K

Publishing Venue

Xerox Disclosure Journal

Abstract

A hybrid thermavhot melt ink jet printhead A is shown in Figure 1. The ink jet printhead A comprises a reservoir layer 10 of any suitable material having formed therein a hot melt ink reservoir section 12, for holding a hot melt ink H, and a thermal fluid reservoir section 14, for holding a thermal fluid T. These two reservoir sections are separated by a wall 16. Located below the reservoir layer 10 is a substrate layer 20, conventionally made out of a glass or ceramic material. Formed in the substrate layer is a plurality of first inlets 22 communicating with the hot melt fluid reservoir 12 as well as a second inlet 24 communicating with the thermal fluid reservoir 14. The inlets 22 are relatively narrow in order to minimize a reverse flow of the hot melt ink back into its reservoir 12.

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 31% of the total text.

Page 1 of 8

XEROX DISCLOSURE JOURNAL

HYBRID THERMALRIOT MELT INK JET PRINTHEAD U.S. C1.346/140 Richard C. Penwell

Proposed Classification

Int. c1. GOlD15/16

H 16 T

FIG. I

XEROX DISCLOSURE JOURNAL - Vol. 19, No. 4 July/August 1994 277

[This page contains 1 picture or other non-text object]

Page 2 of 8

HYBRID THERMAUHOT MELT INK JET PRINTHEAD(Cont'd)

24 22

I

I

I

I

I I I

I

I
I
8

I

20

30

40

50

52

56

, I 60

NG. 2 40

I

46 43

FIG. 3

278 XEROX DISCLOSURE JOURNAL - Vol. 19, No. 4 July/August 1994

[This page contains 1 picture or other non-text object]

Page 3 of 8

HYBRID THERMALlHOT MELT INK JET PRINTHEAD(C0nt'd)

          H T 12 22 I 14 24 1 /

          H FIG. 4 T 12 22 I 14 24 j /

43

32

43 -

FIG. 5

XEROX DISCLOSURE JOURNAL - Vol. 19, No. 4 July/August 1994 279

[This page contains 1 picture or other non-text object]

Page 4 of 8

HYBRID THERMAMOT MELT INK JET PRINTHEAD(Cont'd)

A hybrid thermavhot melt ink jet printhead A is shown in Figure 1. The ink jet printhead A comprises a reservoir layer 10 of any suitable material having formed therein a hot melt ink reservoir section 12, for holding a hot melt ink H, and a thermal fluid reservoir section 14, for holding a thermal fluid T. These two reservoir sections are separated by a wall 16. Located below the reservoir layer 10 is a substrate layer 20, conventionally made out of a glass or ceramic material. Formed in the substrate layer is a plurality of first inlets 22 communicating with the hot melt fluid reservoir 12 as well as a second inlet 24 communicating with the thermal fluid reservoir 14. The inlets 22 are relatively narrow in order to minimize a reverse flow of the hot melt ink back into its reservoir 12.

A first insulating layer 30 is located immediately below the substrate layer 20. This layer can be made of a thick film insulative material such as Vacrela, Ristona, or a polyimide. A plurality of first inlets 32 are formed in the first insulating layer 30, which communicate with the first inlets 22 in the substrate layer. Also formed in the first insulating layer is a second inlet 34 which communicates with the second inlet 24 in the substrate layer 20. A second thick film insulating layer 40 is located directly below the first insulating layer 30. An inlet 41 in the second insulating layer allows the thermal fluid to flow from the second inlet 34 into a reservoir 42 formed in the second insulating layer. The reservoir 42 communicates with a plurality of channels 43 which is also formed in the second insulating layer. The channels 43 terminate at nozzles 44 formed in a nozzle face 46 of the printhead. Figure 2 is a partially shown front elevation view of printhead A, showing a plurality of spaced nozzles 44 located in the nozzle face 46.

If the printhead A is a multi-color ink jet printhead, each of the nozzles 44 can eject a different colored ink. Generally, prior art color printheads, such as the one disclosed in US. Patent No. 4,620,198, employ four ink colors, namely, magenta, cyan, yellow and black. Obviously,...