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

THERMAL DROP ON DEMAND INK JET PRINTHEAD

IP.com Disclosure Number: IPCOM000026109D
Original Publication Date: 1990-Jun-30
Included in the Prior Art Database: 2004-Apr-05
Document File: 4 page(s) / 221K

Publishing Venue

Xerox Disclosure Journal

Abstract

A single four-color printhead 10 that utilizes present fabrication techniques is shown in Figure 1 in cross-sectional view. Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1. The printhead uses batch processing and simultaneous aligning and bonding techniques disclosed in U.S. Patent 4,601,777. Such a processing technique provides precise relative alignment of all four printheads and makes a precision alignment fixture on the printer unnecessary. The printhead is very small and light, especially if off-carriage ink supplies are used.

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 54% of the total text.

Page 1 of 4

XEROX DISCLOSURE JOURNAL

THERMAL DROP ON DEMAND INK JET PRINTHEAD U.S. C1.156/626 Donald J. Drake
Gary A. Kneezel

Proposed Classification

Int. C1. HOll21/306

I

XEROX DISCLOSURE JOURNAL - Vol. 15, No. 3 May/June 1990 125

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

Page 2 of 4

THERMAL DROP ON DEMAND INK JET PRINTHEAD(Cont'd)

18

24

28

30

32

'

59\

126 XEROX DISCLOSURE JOURNAL - Vol. 15, No. 3 May/June 1990

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

Page 3 of 4

THERMAL DROP ON DEMAND INK JET PRINTHEAD(Cont'd)

A single four-color printhead 10 that utilizes present fabrication techniques is shown in Figure 1 in cross-sectional view. Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1. The printhead uses batch processing and simultaneous aligning and bonding techniques disclosed in U.S. Patent 4,601,777. Such a processing technique provides precise relative alignment of all four printheads and makes a precision alignment fixture on the printer unnecessary. The printhead is very small and light, especially if off-carriage ink supplies are used.

Printhead 10 is composed of five anisotropically etched, 20 mils thick silicon plates, four of which have linear arrays of resistive heating elements or heaters 16. Silicon plate 18 has fill holes 20 and 21 and a plurality of individual parallel grooves 12 which connect at one end to the fill hole 21 and the other end is open. The grooves will serve as capillary ink channels and their open ends as nozzles 14. Anisotropically etched cooling groove 50 is perpendicular to the ink channels and located near the end of silicon plate 18 which is opposite to the one which contain the nozzles 14. Inlet 51 (Figure 2) is concurrently etched through the plate. Silicon plate 24 has a recess 25 for an ink manifold. One end of the recess is etched through to form passageway 26 and cooling groove 52 is concurrently etched therein together with inlet 53. Grooves 12 intersect the recess 25 at a side opposite the passageway 26. On the surface of the silicon plate 24, opposite the one with the recess 25, an array of heaters 16 is formed, together with a driver matrix for selectively addressing individual heaters. Silicon plates 18 and 24 are aligned and bonded together so that one heater is in each groove a predetermined distance from the groove open end 14 and fill hole 20 of silicon pl...