US2739637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for bending c-stage postformable plastic material
Assignee: North American Aviation Corp
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Filing: 1954-02-08
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Granted: 1956-03-27
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Expires: 1974-02-08
Abstract
No abstract record available.
Inventors
- 👤 Truman V Tyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:59
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/04; B29C53/06; B29C53/063; B29C53/066; B29D; B29D99/00; B29D99/0039; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0822; B29K; B29K2711/00; B29K2711/12; B29K2711/126; B29L; B29L2031/00; B29L2031/44; B29L2031/441; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1044; Y10T156/1046; Y10T156/1089; Y10T156/1092; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
A DEVICE FOR FORMING A SHEET OF POSTFORMABLE REINFORCED MATERIAL HAVING SPACED UNREINFORCED PORTIONS, SAID DEVICE COMPRISING A FIRST FIXTURE FOR RECEIVING AND HOLDING PORTIONS OF SAID SHEET ON ONE SIDE OF AN UNREINFORCED PORTION, SO AS TO LEAVE SAID UNREINFORCED PORTION UNCONSTRAINED THEREBY; MEANS FOR SUPPORTING A CURVED REINFORCING MEMBER ADJACENT SAID UNREINFORCED PORTION; A SECOND FIXTURE FOR RECEIVING AND HOLDING PORTIONS OF SAID SHEET ON THE OTHER SIDE OF SAID UNREINFORCED PORTION; MEANS FOR HEATING SAID UNREINFORCED PORTION TO THE APPROXIMATE RANGE OF 250* F. TO 350* F.; AND MEANS FOR MOVING SAID SECOND FIXTURE RELATIVE TO SAID FIRST FIXTURE THROUGH AN EXACT PREDETERMINED PATH HAVING A CONTOUR SUCH THAT SAID UNREINFORCED PORTION IS CAUSED TO ASSUME THE CONTOUR OF SAID CURVED REINFORCING MEMBER.
Claim 2
Independent Claim
126 words
A DEVICE FOR FORMING A SHEET OF POSTFORMABLE REINFORCED MATERIAL HAVING SPACED UNREINFORCED PORTIONS, SAID DEVICE COMPRISING A FIRST FIXTURE FOR RECEIVING AND HOLDING PORTIONS OF SAID SHEET ON ONE SIDE OF AN UNREINFORCED PORTION, SO AS TO LEAVE SAID UNREINFORCED PORTION UNCONSTRAINED THEREBY; MEANS FOR SUPPORTING A CURVED REINFORCING MEMBER ADJACENT SAID UNREINFORCED PORTION; A SECOND FIXTURE FOR RECEIVING AND HOLDING PORTIONS OF SAID SHEET ON THE OTHER SIDE OF SAID UNREINFORCED PORTION; MEANS FOR HEATING SAID UNREINFORCED PORTION TO THE APPROXIMATE RANGE OF 250* F. TO 350* F.; AND MEANS FOR MOVING SAID SECOND FIXTURE RELATIVE TO SAID FIRST FIXTURE THROUGH AN EXACT PREDETERMINED PATH HAVING A CONTOUR SUCH THAT SAID UNREINFORCED PORTION IS CAUSED TO ASSUME THE CONTOUR OF SAID CURVED REINFORCING MEMBER.
Claim 3
Independent Claim
101 words
THE METHOD OF FORMING FROM POSTFORMABLE MATERIAL A FULLY REINFORCE STRUCTURE HAVING BENT PORTIONS, COMPRISING ATTACHING TO A SUBSTANTIALLY FLAT SHEET OF SAID MATERIAL AT LEAST TWO RIGID REINFORCING MEMBERS ARRANGED TO PROVIDE AN UNREINFORCED BENDABLE PORTION, FIXING THE FIRST OF THE PORTIONS OF SAID SHEET SO REINFORCED RELATIVE TO THE SECOND PORTION SO REINFORCED, HEATING SAID BENDABLE PORTION TO THE APPROXIMATE RANGE OF BETWEEN 250* F. AND 350* F. GRIPPING SAID SECOND PORTION SO REINFORCED, AND PIVOTING SAID SECOND REINFORCED PORTION RELATIVE TO SAID FIRST REINFORCED PORTION THROUGH AN EXACT PATH WHEREBY SAID UNREINFORCED PORTION IS GIVEN A PREDETERMINED CURVATURE.
Claim 4
Independent Claim
101 words
THE METHOD OF FORMING FROM POSTFORMABLE MATERIAL A FULLY REINFORCE STRUCTURE HAVING BENT PORTIONS, COMPRISING ATTACHING TO A SUBSTANTIALLY FLAT SHEET OF SAID MATERIAL AT LEAST TWO RIGID REINFORCING MEMBERS ARRANGED TO PROVIDE AN UNREINFORCED BENDABLE PORTION, FIXING THE FIRST OF THE PORTIONS OF SAID SHEET SO REINFORCED RELATIVE TO THE SECOND PORTION SO REINFORCED, HEATING SAID BENDABLE PORTION TO THE APPROXIMATE RANGE OF BETWEEN 250* F. AND 350* F. GRIPPING SAID SECOND PORTION SO REINFORCED, AND PIVOTING SAID SECOND REINFORCED PORTION RELATIVE TO SAID FIRST REINFORCED PORTION THROUGH AN EXACT PATH WHEREBY SAID UNREINFORCED PORTION IS GIVEN A PREDETERMINED CURVATURE.
References Cited (Backward Citations)
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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) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |