Electrodeposition process for producing perforated foils with raised portions at the edges of the holes
Abstract
Abstract A REPAIRABLE MASTER NEGATIVE AND A PROCESS FOR PRODUCINA G MASTER NEGATIVE SUITABLE FOR THE PRODUCTION OF A NUMBER OF PERFORATED FOILS AND FOR REGENERATING SUCH A MASTER NEGATIVE WHEN IT IS WORN, COMPRISING APPLYING INSULATING MATERIAL TO ONE SURFACE OF A METALLIC BASE PLATE THAT IS STABLE IN A BATH OF AN ALKALI AT SELECTED AREAS THEREOF WHICH CONFORM WITH THE PERFORATIONS IN THE FOILS TO BE PRODUCED, APPLYING A COATING OF A METAL WHICH IS ERODABLE IN A BATH OF AN ALKALI WHICH IS BUILT UP ON THE METALLIC BASE PLATE AFTER THE INSULATING AREAS HAVE BEEN APPLIED TO IT, AND PASSIVATING THE METALLIC COATING WHEN THE MASTER NEGATIVE IS WORN DUE TO THE PRODUCTION OF A NUMBER OF PERFORATED FOILS, IT IS REPAIRED BY STRIPPING OFF ELECTROLYTICALLY IN A BATH OF AN ALKALI THE METALLIC COATING AND A NEW METALLIC COATING IS ELECTRODEPOSITED ON THE METALLIC BASE PLATE WITHOUT DISTURBING THE INSULATED AREAS.
Inventors
- 👤 B Futterer
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |