Patent US3073373A successfully refreshed from Google Patents.
US3073373A
Expired / Lapsed
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Stretch forming apparatus
Assignee: Hufford Corp
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Filing: 1957-10-14
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Granted: 1963-01-15
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Expires: 1977-10-14
Abstract
No abstract record available.
Inventors
- 👤 Walter G Wheeler
- 👤 Kingsley C Drone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:48
CPC Classifications
B; B21; B21D; B21D11/00; B21D11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
APPARATUS FOR STRETCH-WRAP FORMING OF A METAL SHEET, COMPRISING IN COMBINATION: A STATIONARY FRAME, A DIE TABLE MOUNTED ON THE FRAME FOR MOVEMENT IN A DIRECTION NORMA TO THE INITIAL PLANE OF THE SHEET, A DIE ON THE TABLE MOVABLE INTO ENGAGEMENT WITH A SURFACE OF THE SHEET, A PAIR OF OPPOSED JAW ASSEMBLIES MOVABLY MOUNTED ON THE FRAME AT OPPOSITE ENDS OF THE DIE TABLE, EACH JAW ASSEMBLY HAVING A PLURALITY OF GRIPPER ELEMENTS ENGAGING THE SHEET, POWER MEANS FOR MOVING THE JAW ASSEMBLIES IN OPPOSITE DIRECTIONS RELATIVE TO THE FRAME TO IMPART TENSION FORCES TO THE SHEET, AND CLAMP MEANS ON THE FRAME ADAPTED TO COOPERATE WITH THE EDGE OF THE SHEET TO APPLY TANGENTIAL FORCES TO RESTRAIN INWARD MOVEMENT THEREOF WHILE PERMITTING LONGITUDINAL STRETCHING MOVEMENT OF THE SHEET
Claim 2
Dependent Claim
131 words
APPARATUS FOR STRETCH-WRAP FORMING OF A METAL SHEET, COMPRISING IN COMBINATION: A STATIONARY FRAME, A DIE TABLE MOUNTED ON THE FRAME FOR MOVEMENT IN A DIRECTION NORMA TO THE INITIAL PLANE OF THE SHEET, A DIE ON THE TABLE MOVABLE INTO ENGAGEMENT WITH A SURFACE OF THE SHEET, A PAIR OF OPPOSED JAW ASSEMBLIES MOVABLY MOUNTED ON THE FRAME AT OPPOSITE ENDS OF THE DIE TABLE, EACH JAW ASSEMBLY HAVING A PLURALITY OF GRIPPER ELEMENTS ENGAGING THE SHEET, POWER MEANS FOR MOVING THE JAW ASSEMBLIES IN OPPOSITE DIRECTIONS RELATIVE TO THE FRAME TO IMPART TENSION FORCES TO THE SHEET, AND CLAMP MEANS ON THE FRAME ADAPTED TO COOPERATE WITH THE EDGE OF THE SHEET TO APPLY TANGENTIAL FORCES TO RESTRAIN INWARD MOVEMENT THEREOF WHILE PERMITTING LONGITUDINAL STRETCHING MOVEMENT OF THE SHEET
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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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |