US5212496A — Coated ink jet printhead

Claim 1

Independent Claim 45 words

An ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the surface being coated with a polyimide-siloxane block copolymer.

Claim 2

Dependent Claim 45 words

An ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the surface being coated with a polyimide-siloxane block copolymer.

Claim 3

Dependent Claim 25 words

A printhead according to claim 1 wherein the polyimide-siloxane block copolymer has a siloxane content of from about 1 to about 30 percent by weight.

Claim 4

Dependent Claim 24 words

A printhead according to claim 1 wherein the coating of the polyimide-siloxane copolymer has a thickness of from about 0.001 to about 10 microns.

Claim 5

Dependent Claim 33 words

A printhead according to claim 1 wherein the printhead surface coated with the polyimide-siloxane block copolymers is of a material selected from the group consisting of silicon containing compounds, polyimides, and mixtures thereof.

Claim 6

Dependent Claim 104 words

A printhead according to claim 1 wherein the polyimide-siloxane block copolymer is of the formula ##STR11## wherein x and y represent the numbers of repeating segments, the dotted circles Ar 1 , Ar 2 , Ar 3 , and Ar 4 are independently selected from aromatic groups, l and n are numbers of from 1 to about 15, m is a number of from 1 to about 100, R 1 and R 2 are independently selected from alkyl groups, and R 3 represents an aliphatic or an aromatic group, and the polymer contains from about 1 to about 30 percent by weight of siloxane.

Claim 7

Dependent Claim 26 words

A printhead according to claim 1 wherein the polyimide-siloxne block copolymer is of the formula ##STR12## wherein x and y represent the numbers of repeating segments.

Claim 8

Dependent Claim 87 words

A process for preparing a printhead suitable for ink jet printing which comprises dissolving a polyimide-siloxane block copolymer in a suitable solvent; applying the solution thus formed to an ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the solution being applied to said surface; and allowing the solvent to evaporate, thereby forming a film of the copolymer on said surface.

Claim 9

Dependent Claim 87 words

A process for preparing a printhead suitable for ink jet printing which comprises dissolving a polyimide-siloxane block copolymer in a suitable solvent; applying the solution thus formed to an ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the solution being applied to said surface; and allowing the solvent to evaporate, thereby forming a film of the copolymer on said surface.

Claim 10

Dependent Claim 21 words

A process according to claim 7 wherein the copolymer film has a thickness of from about 0.001 to about 10 microns.

Claim 11

Dependent Claim 25 words

A process according to claim 7 wherein a gas is passed through the channels while the solution is applied to the surface of the printhead.

Claim 12

Dependent Claim 104 words

A process according to claim 7 wherein the polyimide-siloxane block copolymer is of the formula ##STR13## wherein x and y represent the numbers of repeating segments, the dotted circles Ar 1 , Ar 2 , Ar 3 , and Ar 4 are independently selected from aromatic groups, l and n are numbers of from 1 to about 15, m is a number of from 1 to about 100, R 1 and R 2 are independently selected from alkyl groups, and R 3 represents an aliphatic or an aromatic group, and the polymer contains from about 1 to about 30 percent by weight of siloxane.

Claim 13

Dependent Claim 26 words

A process according to claim 7 wherein the polyimide-siloxane block copolymer is of the formula ##STR14## wherein x and y represent the numbers of repeating segments.

Claim 14

Dependent Claim 89 words

A process for preparing a printhead which comprises coating a polyimide-siloxane block copolymer onto at least one surface of a substrate; contacting the coated surface of the substrate to an ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the coated substrate being contacted to said surface; and causing a film of the copolymer to be transferred from the substrate to said surface.

Claim 15

Dependent Claim 89 words

A process for preparing a printhead which comprises coating a polyimide-siloxane block copolymer onto at least one surface of a substrate; contacting the coated surface of the substrate to an ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the coated substrate being contacted to said surface; and causing a film of the copolymer to be transferred from the substrate to said surface.

Claim 16

Dependent Claim 27 words

A process according to claim 12 wherein the copolymer film on the surface of the printhead has a thickness of from about 0.001 to about 10 microns.

Claim 17

Dependent Claim 81 words

An ink jet printing process which comprises (1) providing an ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the surface being coated with a polyimide-siloxane block copolymer; (2) filling the channels with an ink; and (3) causing droplets of ink to be expelled from the nozzles onto a receiver sheet in an image pattern.

Claim 18

Dependent Claim 81 words

An ink jet printing process which comprises (1) providing an ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the surface being coated with a polyimide-siloxane block copolymer; (2) filling the channels with an ink; and (3) causing droplets of ink to be expelled from the nozzles onto a receiver sheet in an image pattern.

Claim 19

Dependent Claim 107 words

An ink jet printing process according to claim 14 wherein the polyimide-siloxane block copolymer is of the formula ##STR15## wherein x and y represent the numbers of repeating segments, the dotted circles Ar 1 , Ar 2 , Ar 3 , and Ar 4 are independently selected from aromatic groups, l and n are numbers of from 1 to about 15, m is a number of from 1 to about 100, R 1 and R 2 are independently selected from alkyl groups, and R 3 represents an aliphatic or an aromatic group, and the polymer contains from about 1 to about 30 percent by weight of siloxane.

Claim 20

Dependent Claim 29 words

An ink jet printing process according to claim 14 wherein the polyimide-siloxane block copolymer is of the formula ##STR16## wherein x and y represent the numbers of repeating segments.

Claim 21

Dependent Claim 86 words

A thermal ink jet printing process which comprises (1) providing an ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the surface being coated with a polyimide-siloxane block copolymer; (2) filling the channels with an ink; and (3) heating selected channels, thereby causing droplets of ink to be expelled from the nozzles onto a receiver sheet in an image pattern.

Claim 22

Dependent Claim 86 words

A thermal ink jet printing process which comprises (1) providing an ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the surface being coated with a polyimide-siloxane block copolymer; (2) filling the channels with an ink; and (3) heating selected channels, thereby causing droplets of ink to be expelled from the nozzles onto a receiver sheet in an image pattern.

Claim 23

Dependent Claim 108 words

A thermal ink jet printing process according to claim 17 wherein the polyimide-siloxane block copolymer is of the formula ##STR17## wherein x and y represent the numbers of repeating segments, the dotted circles Ar 1 , Ar 2 , Ar 3 , and Ar 4 are independently selected from aromatic groups, l and n are numbers of from 1 to about 15, m is a number of from 1 to about 100, R 1 and R 2 are independently selected from alkyl groups, and R 3 represents an aliphatic or an aromatic group, and the polymer contains from about 1 to about 30 percent by weight of siloxane.

Claim 24

Dependent Claim 30 words

A thermal ink jet printing process according to claim 17 wherein the polyimide-siloxane block copolymer is of the formula ##STR18## wherein x and y represent the numbers of repeating segments.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1996-05-17	1996-11-16	1997-05-18	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2000-05-17	2000-11-16	2001-05-18	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2004-05-17	2004-11-16	2005-05-18	$7700.00	Window Closed / Lapsed

Coated ink jet printhead

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag