US4929256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-disc cutter and method of manufacture
Assignee: Xaar Technology Ltd
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Filing: 1988-09-19
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Granted: 1990-05-29
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Expires: 2008-09-19
Abstract
Abstract A method of manufacturing one or more nozzles (13) for an ink jet printhead initially comprises bonding a nozzle plate (14) to the ink ejection end of the printhead (16). A mask (12) is then secured in contact with the nozzle plate (14), the mask having a plurality of apertures (15) each defining a respective nozzle exit. Laser radiation applied to the mask exposes the areas defined by the apertures to ablate the plate material between the nozzle exits on the external surface of the plate and corresponding nozzle inlets on the opposite surface of the plate. The assembly comprising the printhead (16), plate (14) and mask (12) is rocked during the exposure step to increase the area of the nozzle inlet relative to its outlet. Also, prior to the nozzle formation step, one or more ink troughs (22) may be provided for supplying an external source of ink for each nozzle. The ink troughs (22), which may be formed using laser ablation techniques similar to those used in the formation of the nozzles, facilitate a continuous, positive flow of ink through the nozzles.
Inventors
- 👤 Mark R. Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:24
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/064; B23K26/066; B23K26/0661; B23K26/18; B23K26/36; B23K26/38; B23K26/382; B23K26/389; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/16; B41J2/162; B41J2/1621; B41J2/1623; B41J2/1632; B41J2/1634; B23K2103/00; B23K2103/30; B23K2103/42; B23K2103/50
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
97 words
A method of making an abrasive cutting tool having precisely controlled dimensions, comprising the steps of: uniformly coating at least a portion of a cylindrical holder with a mixture of diamond powder and resin; rotating said cylindrical holder about its longitudinal axis; and exposing the rotating coating to an optical beam having an energy level less than the ablation threshold of said diamond powder and adapted for ablating the resin in said mixture so as to form a plurality of spaced annular depressions in said coating, each pair of successive depressions defining therebetween an abrasive cutting disc.
Claim 2
Independent Claim
97 words
A method of making an abrasive cutting tool having precisely controlled dimensions, comprising the steps of: uniformly coating at least a portion of a cylindrical holder with a mixture of diamond powder and resin; rotating said cylindrical holder about its longitudinal axis; and exposing the rotating coating to an optical beam having an energy level less than the ablation threshold of said diamond powder and adapted for ablating the resin in said mixture so as to form a plurality of spaced annular depressions in said coating, each pair of successive depressions defining therebetween an abrasive cutting disc.
Claim 3
Dependent Claim
49 words
The method of claim 1 wherein said exposing step comprises exposing said coating to a high energy beam for forming each of said annular depressions with a predetermined tapered profile such that each of said cutting discs is characterized by a tapered profile reverse that of said predetermined profile.
Claim 4
Dependent Claim
49 words
The method of claim 2 including the step of effecting relative rocking motion between said cylindrical holder and said optical beam so as to form each of said annular depressions with a substantially rectangular profile, whereby each of said cutting discs is also characterized by a substantially rectangular profile.
Claim 5
Dependent Claim
34 words
The method of claim 2 wherein said coating step comprises coating at least a portion of said cylindrical holder with said mixture to a depth exceeding the depth of said annular depressions formed therein.
Claim 6
Dependent Claim
41 words
The method of claim 4 wherein said exposing step comprises displacing said optical beam and said cylindrical holder relative to each other in a plurality of steps along the longitudinal axis of said holder to form said plurality of annular depressions.
Claim 7
Dependent Claim
38 words
The method of claim 4 wherein said exposing step comprises simultaneously ablating said resin with a plurality of high energy laser beams spaced along the longitudinal axis of said cylindrical holder to form said plurality of annular depressions.
Claim 8
Dependent Claim
14 words
The method of claim 5 including employing an excimer laser as said optical beam.
Claim 9
Independent Claim
137 words
A method of making an abrasive cutting tool having precisely controlled dimensions, comprising the steps of: uniformly coating at least a portion of a cylindrical holder with a mixture of diamond powder and resin; rotating said cylindrical holder about its longitudinal axis; exposing the rotating coating to an optical beam having an energy level less than the ablation threshold of said diamond powder and adapted for ablating the resin in said mixture so as to form a plurality of spaced annular depressions in said coating, each pair of successive depressions defining therebetween an abrasive cutting disc; and effecting relative rocking motion between said cylindrical holder and said optical beam so as to form each of said annular depressions with a substantially rectangular profile, whereby each of said cutting discs is also characterized by a substantially rectangular profile.
Claim 10
Independent Claim
137 words
A method of making an abrasive cutting tool having precisely controlled dimensions, comprising the steps of: uniformly coating at least a portion of a cylindrical holder with a mixture of diamond powder and resin; rotating said cylindrical holder about its longitudinal axis; exposing the rotating coating to an optical beam having an energy level less than the ablation threshold of said diamond powder and adapted for ablating the resin in said mixture so as to form a plurality of spaced annular depressions in said coating, each pair of successive depressions defining therebetween an abrasive cutting disc; and effecting relative rocking motion between said cylindrical holder and said optical beam so as to form each of said annular depressions with a substantially rectangular profile, whereby each of said cutting discs is also characterized by a substantially rectangular profile.
Claim 11
Dependent Claim
34 words
The method of claim 8 wherein said coating step comprises coating at least a portion of said cylindrical holder with said mixture to a depth exceeding the depth of said annular depressions formed therein.
Claim 12
Dependent Claim
41 words
The method of claim 9 wherein said exposing step comprises displacing said optical beam and said cylindrical holder relative to each other in a plurality of steps along the longitudinal axis of said holder to form said plurality of annular depressions.
Claim 13
Dependent Claim
38 words
The method of claim 9 wherein said exposing step comprises simultaneously ablating said resin with a plurality of high energy laser beams spaced along the longitudinal axis of said cylindrical holder to form said plurality of annular depressions.
Claim 14
Dependent Claim
14 words
The method of claim 10 including employing an excimer laser as said optical beam.
Claim 15
Independent Claim
116 words
A method of making an abrasive cutting tool having precisely controlled dimensions, comprising the steps of: uniformly coating at least a portion of a cylindrical holder with a mixture of diamond powder and resin; rotating said cylindrical holder about its longitudinal axis; and exposing the rotating coating to a plurality of high energy optical beams spaced along the longitudinal axis of said cylindrical holder, each of said beams having an energy level less than the ablation threshold of said diamond powder, said beams being adapted for ablating the resin in said mixture so as to form a plurality of spaced annular depressions in said coating, each pair of successive depressions defining therebetween an abrasive cutting disc.
Claim 16
Independent Claim
116 words
A method of making an abrasive cutting tool having precisely controlled dimensions, comprising the steps of: uniformly coating at least a portion of a cylindrical holder with a mixture of diamond powder and resin; rotating said cylindrical holder about its longitudinal axis; and exposing the rotating coating to a plurality of high energy optical beams spaced along the longitudinal axis of said cylindrical holder, each of said beams having an energy level less than the ablation threshold of said diamond powder, said beams being adapted for ablating the resin in said mixture so as to form a plurality of spaced annular depressions in said coating, each pair of successive depressions defining therebetween an abrasive cutting disc.
Claim 17
Dependent Claim
49 words
The method of claim 13 including the step of effecting relative rocking motion between said cylindrical holder and said optical beam so as to form each of said annular depressions with a substantially rectangular profile, whereby each of said cutting discs is also characterized by a substantially rectangular profile.
Claim 18
Dependent Claim
34 words
The method of claim 13 wherein said coating step comprises coating at least a portion of said cylindrical holder with said mixture to a depth exceeding the depth of said annular depressions formed therein.
Claim 19
Dependent Claim
17 words
The method of claim 16 including employing an excimer laser as the source of said optical beams.
Claim 20
Dependent Claim
98 words
An abrasive cutting tool comprising a generally cylindrically shaped cutting head coated with a mixture of diamond powder and resin, said cutting head having a plurality of annular depressions spaced along its longitudinal axis, each pair of successive depressions defining therebetween a respective annular abrasive cutting disc, said depressions being formed by rotating said cutting head about its longitudinal axis while exposing the rotating head to an optical beam having an energy level less than the ablation threshold of said diamond powder and adapted for ablating the resin in said mixture so as to form said annular depressions.
Claim 21
Dependent Claim
98 words
An abrasive cutting tool comprising a generally cylindrically shaped cutting head coated with a mixture of diamond powder and resin, said cutting head having a plurality of annular depressions spaced along its longitudinal axis, each pair of successive depressions defining therebetween a respective annular abrasive cutting disc, said depressions being formed by rotating said cutting head about its longitudinal axis while exposing the rotating head to an optical beam having an energy level less than the ablation threshold of said diamond powder and adapted for ablating the resin in said mixture so as to form said annular depressions.
Claim 22
Dependent Claim
24 words
The cutting tool of claim 17 wherein said mixture has a substantially uniform thickness which exceeds the depth of the annular depressions formed therein.
Claim 23
Dependent Claim
54 words
The cutting tool of claim 17 wherein said depressions are further formed by effecting relative rocking motion between said cylindrical cutting head and said optical beam so as to form each of said annular depressions with a substantially rectangular profile, whereby each of said cutting discs is also characterized by a substantially rectangular profile.
Claim 24
Dependent Claim
46 words
The cutting tool of claim 18 wherein said depressions are further formed by displacing said optical beam and said cylindrical cutting head relative to each other in a plurality of steps along the longitudinal axis of said cutting head to form said plurality of annular depressions.
Claim 25
Dependent Claim
42 words
The cutting tool of claim 18 wherein said depressions are further formed by simultaneously ablating said resin with a plurality of high energy laser beams spaced along the longitudinal axis of said cylindrical cutting head to form said plurality of annular depressions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |