Patent US4045312A successfully refreshed from Google Patents.
US4045312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the electrolytic etching of metal workpiece
Assignee: Dai Nippon Printing Co Ltd
•
Filing: 1975-11-26
•
Granted: 1977-08-30
•
Expires: 1995-11-26
Abstract
Abstract A method for the electrolytic etching of metal workpiece comprising placing a stencil made of an electric insulating material having a pattern consisting of open portions and non-opened portions into intimate contact with the metal workpiece, placing an electrode adjacent to said metal, jetting an electrolyte between said metal workpiece and the electrode while passing an electric current through the jet of electrolyte in a direction from said metal workpiece to said electrode to electrolytically etch said metal workpiece, and then separating said stencil from the electrolytically etched metal workpiece. Said stencil can then be placed into intimate contact with the next metal workpiece to be electrolytically etched, and electrolytically etching the metal workpiece in the same manner as above and then repeating this electrolytic etching procedure with said one stencil thereby etching many metal workpieces.
Inventors
- 👤 Takeuchi Satoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:08
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/02; C25F3/14
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
110 words
A method for the electrolytic etching of a metal workpiece comprising placing a stencil made of an electric insulating material containing a pattern having open portions and closed portions into intimate contact with the metal workpiece, placing an electrode adjacent to said metal workpiece, maintaining a distance of from several 10 microns to several mm between said electrodes and said metal workpiece, and jetting an electrolyte between said electrode and said metal workpiece while passing an electric current through the jet of electrolyte in the direction from said metal workpiece to said electrode to electrolytically etch said metal workpiece, and then separating said stencil from the electrolytically etched metal workpiece.
Claim 2
Independent Claim
110 words
A method for the electrolytic etching of a metal workpiece comprising placing a stencil made of an electric insulating material containing a pattern having open portions and closed portions into intimate contact with the metal workpiece, placing an electrode adjacent to said metal workpiece, maintaining a distance of from several 10 microns to several mm between said electrodes and said metal workpiece, and jetting an electrolyte between said electrode and said metal workpiece while passing an electric current through the jet of electrolyte in the direction from said metal workpiece to said electrode to electrolytically etch said metal workpiece, and then separating said stencil from the electrolytically etched metal workpiece.
Claim 3
Dependent Claim
57 words
A method as claimed in claim 1 wherein said pattern having open and closed portions is a screen made of an electric insulating material and wherein said stencil to be used is made by filling the meshes of the screen of that portion corresponding to the non-etched portion of the metal workpiece with an electric insulating resist.
Claim 4
Dependent Claim
60 words
A method as claimed in claim 1 wherein said pattern having open and closed portions is a screen made of an electric insulating material and wherein said stencil to be used is made by filling the meshes of the screen of that portion corresponding to the non-etched portion of the metal workpiece with a paste of an electric insulating material.
Claim 5
Dependent Claim
44 words
A method as claimed in claim 1 wherein said stencil to be used is made by bonding a film made of an electric insulating material, and forming a pattern consisting of open and closed portions on a screen made of an electric insulating material.
Claim 6
Dependent Claim
33 words
A method as claimed in claim 1 wherein said stencil to be used is made of an electric insulating material formed as a pattern consisting of an open portion and a closed portion.
Claim 7
Dependent Claim
26 words
A method as claimed in claim 1 wherein the flow of the electrolyte is jetted perpendiculary to the metal workpiece to electrolytically etch the surface thereof.
Claim 8
Dependent Claim
25 words
A method as claimed in claim 1 wherein said metal workpiece and stencil are pressed locally into intimate contact with each other by pressing means.
Claim 9
Dependent Claim
14 words
A method as claimed in claim 7 wherein said pressing means are pressing rolls.
Claim 10
Dependent Claim
19 words
A method as claimed in claim 8 wherein said pressing rolls are provided with means for discharging the electrolyte.
Claim 11
Dependent Claim
14 words
A method as claimed in claim 7 wherein said pressing means are pressing plates.
Claim 12
Dependent Claim
19 words
A method as claimed in claim 10 wherein said pressing plates are provided with means for discharging the electrolyte.
Claim 13
Dependent Claim
22 words
A method as claimed in claim 1 wherein said metal workpiece and stencil are bonded to each other with a pressure-sensitive binder.
Claim 14
Dependent Claim
38 words
A method as claimed in claim 1 wherein said electrode to be used is a plate-shaped eletrode and said metal and stencil are locally pressed with said plate-shaped electrode so that said metal may be locally, electrolytically etched.
Claim 15
Dependent Claim
90 words
A method as claimed in claim 1 wherein said electrode to be used is a plate-shaped electrode, said metal workpiece and stencil are locally pressed with said plate-shaped electrode so that said metal workpiece may be locally electrolytically etched, then said plate-shaped electrode is moved to locally press said metal workpiece and stencil together in other locations so that said metal workpiece may be electrolytically etched and then said plate-shaped electrode is moved in turn so that the unmachined parts of said metal workpiece may be electrolytically etched, in turn.
Claim 16
Dependent Claim
46 words
A method as claimed in claim 1 wherein said metal workpiece and stencil are mounted on a supporting base having a convex surface and are pressed onto the convex surface of said supporting base by said pressing means so as to be in intimate contact therewith.
Claim 17
Dependent Claim
29 words
The method of claim 1 wherein the separated stencil is again placed into intimate contact with a subsequent metal workpiece and the procedure is repeated a plurality of times.
References Cited (Backward Citations)
US2620296A
Cited
US2532907A
Cited
US2895814A
Cited
GB872961A
Cited
GB1009518A
Cited
US3756937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |