US3296850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mask forming
Assignee: Rauland Borg Corp
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Filing: 1964-08-25
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Granted: 1967-01-10
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Expires: 1984-08-25
Abstract
No abstract record available.
Inventors
- 👤 Joseph P Fiore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:50
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/14; H01J9/142; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN THE MANUFACTURE OF A SHADOW-MASK TYPE OF COLOR CATHODE-RAY TUBE, THE METHOD OF FORMING A SHADOW-MASK FROM A SHEET OF METAL HAVING A MULTIPLICITY OF APERTURES WITHIN A FIELD OF PREDETERMINED CONFIGURATION BOUNDED BY A STRIP OF SAID METAL AND WITHOUT INTRODUCING NON-UNIFORMITIES INTO SAID FIELD, WHICH METHOD COMPRISES: CLAMPING SAID SHEET ALONG A CLAMPING LINE WITHIN SAID STRIP AND SPACED A PREDETERMINED MINIMAL DISTANCE FROM SAID FIELD; DRAWING SAID SHEET OVER A PUNCH TO DRAPE DRAW SAID SHEET TO THE CONTOUR OF SAID PUNCH AND TO DRAW A FILLET IN SAID SHEET, SAID PUNCH HAVING THE SAME PERIPHERAL CONFIGURATION AS SAID FIELD AND AN AREA LARGER THAN SAID FIELD BUT SMALLER THAN THAT ENCLOSED BY SAID CLAMPING LINE TO LOCATE SAID FILLET IN THE PORTION OF SAID STRIP BETWEEN SAID FIELD AND SAID CLAMPING LINE; UNCLAMPING SAID SHEET AND FORMING THE REMAINING PORTION OF SAID STRIP BEYOND SAID CLAMPING LINE INTO A SKIRT EXTENSION OF SAID FILLET.
Claim 2
Dependent Claim
159 words
IN THE MANUFACTURE OF A SHADOW-MASK TYPE OF COLOR CATHODE-RAY TUBE, THE METHOD OF FORMING A SHADOW-MASK FROM A SHEET OF METAL HAVING A MULTIPLICITY OF APERTURES WITHIN A FIELD OF PREDETERMINED CONFIGURATION BOUNDED BY A STRIP OF SAID METAL AND WITHOUT INTRODUCING NON-UNIFORMITIES INTO SAID FIELD, WHICH METHOD COMPRISES: CLAMPING SAID SHEET ALONG A CLAMPING LINE WITHIN SAID STRIP AND SPACED A PREDETERMINED MINIMAL DISTANCE FROM SAID FIELD; DRAWING SAID SHEET OVER A PUNCH TO DRAPE DRAW SAID SHEET TO THE CONTOUR OF SAID PUNCH AND TO DRAW A FILLET IN SAID SHEET, SAID PUNCH HAVING THE SAME PERIPHERAL CONFIGURATION AS SAID FIELD AND AN AREA LARGER THAN SAID FIELD BUT SMALLER THAN THAT ENCLOSED BY SAID CLAMPING LINE TO LOCATE SAID FILLET IN THE PORTION OF SAID STRIP BETWEEN SAID FIELD AND SAID CLAMPING LINE; UNCLAMPING SAID SHEET AND FORMING THE REMAINING PORTION OF SAID STRIP BEYOND SAID CLAMPING LINE INTO A SKIRT EXTENSION OF SAID FILLET.
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |