US3077127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making sheet metal files
Assignee: Robert Bosch Tool Corp
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Filing: 1959-08-06
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Granted: 1963-02-12
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Expires: 1979-08-06
Abstract
No abstract record available.
Inventors
- 👤 Robert E Stutzke
- 👤 Alvin B Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:19
CPC Classifications
B; B23; B23D; B23D73/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD OF MAKING SHEET METAL FILES AND THE LIKE COMPRISING THE STEPS OF RETAINING A SHEET METAL BLANK AGAINST LONGITUDINAL MOVEMENT, SIMULTANEOUSLY CUTTING INTO OPPOSITE SIDES OF SAID SHEET METAL BLANK SHORT OF THE THICKNESS THEREOF AT POINTS OFFSET SLIGHTLY IN THE DIRECTION OF THE PLANE OF THE BLANK TO RAISE SHARP BURRS ON THE BLANK, REPEATING SAID CUTTING STEP AT SPACED POINTS ALONG THE LENGTH OF BLANK, AND BENDING THE SLATS DEFINED BETWEEN PREVIOUSLY FORMED ADJACENT CUTS TO AN INCLINED POSITION RELATIVE TO THE PLANE OF THE BLANK TO DISPOSE SAID BURRS OUTERMOST AND OPEN UP CHIP CLEARANCE SLOTS BETWEEN SAID SLATS.
Claim 2
Independent Claim
104 words
A METHOD OF MAKING SHEET METAL FILES AND THE LIKE COMPRISING THE STEPS OF RETAINING A SHEET METAL BLANK AGAINST LONGITUDINAL MOVEMENT, SIMULTANEOUSLY CUTTING INTO OPPOSITE SIDES OF SAID SHEET METAL BLANK SHORT OF THE THICKNESS THEREOF AT POINTS OFFSET SLIGHTLY IN THE DIRECTION OF THE PLANE OF THE BLANK TO RAISE SHARP BURRS ON THE BLANK, REPEATING SAID CUTTING STEP AT SPACED POINTS ALONG THE LENGTH OF BLANK, AND BENDING THE SLATS DEFINED BETWEEN PREVIOUSLY FORMED ADJACENT CUTS TO AN INCLINED POSITION RELATIVE TO THE PLANE OF THE BLANK TO DISPOSE SAID BURRS OUTERMOST AND OPEN UP CHIP CLEARANCE SLOTS BETWEEN SAID SLATS.
References Cited (Backward Citations)
FR457841A
Cited
FR1088345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |