Chemical radiusing conductor edges of flat cable
Abstract
Abstract A METAL FOIL IS COATED ON ONE SIDE WITH A RESINOUS FILM. AN ETCH RESIST COATING IS DEPOSITED ON THE METALLIC FOIL IN A PREDETERMINED PATTERN TO PRODUCE A DESIRED CONFIGURATION OF METAL CONDUCTOR STRIPS AFTER THE COMPOSITE IS PASSED FIRST THROUGH A METAL ETCHING SOLUTION AND THEN A SOLUTION WHICH REMOVES THE RESIST COATING. THE RESULTING FLAT METALLIC CONDUCTORS HAVE SHARP UNDERCUT ETCHED EDGES. THE COMPOSITE IS AGAIN PASSED THROUGH A METAL ETCHING SOLUTION. THE SHAPR CONDUCTOR EDGES ARE THEREBY ROUNDED SO THAT THE METALLIC CONDUCTORS ARE REDUCED TO A CROSS SECTION WITHOUT SHARP EDGES. THE EXPOSED CONDUCTORS ARE COATED WITH A RESINOUS FILM TO COMPLETE THE INSULATION OF THE CONDUCTORS. THE ROUNDED EDGES OF THE CONDUCTORS PERMIT THE CABLE TO BE CREASED WITHOUT CRACKING THE INSULATION.
Inventors
- 👤 Edward J Traynor Jr
Bibliographic Details
Claims Analysis
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |