Patent US2508534A successfully refreshed from Google Patents.
Patent US3777529A successfully refreshed from Google Patents.
US3777529A
Expired / Lapsed
US
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Dual bend forming device and method
Assignee: Houdaille Industries Inc
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Filing: 1972-03-20
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Granted: 1973-12-11
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Expires: 1992-03-20
Abstract
Abstract A sheet forming device and method capable of providing a hooked end on a sheet with one operation, the hook having a dual bend. The device incorporates a movable forming bar which enclamps the end portion of a sheet between the forming bar and a base. The forming bar has a radius bend lip projecting from it and a secondary angle die section spaced from the radius bend. The secondary angle die section overlies a urethane insert in the base. The urethane is displaced by the pressure of the forming bar against the plate sufficient to force the plate to conform with the die surface of the forming bar. A folding bar is actuatable to bend the end of the plate around the radius bend.
Inventors
- 👤 H Kaufmann
- 👤 E Lavoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:27
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/04; B21D5/042; B21D19/00; B21D19/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
284 words
A device for forming a hook end for sheet material with a secondary bend closely spaced to the hook end comprising a base member having a top surface with an end face, a forming bar positioned above said top surface, said forming bar movable from a position above said top surface to a second position closely spaced to said top surface, said forming bar having a projection terminating in a radius bend, said projection overlying a portion of said top surface and extending beyond said end face when in said second position, said forming bar having a bottom surface with a first portion including a portion of said projection, a second portion of said bottom surface projecting at an angle to the first portion, the juncture of the first and second portions overlying a second portion of the top surface, means for inserting an end portion of a strip of sheet material between said top surface and said bottom surface with a portion extending beyond the said end face, means for bending the said portion of the sheet material extending beyond the said end face around the said radius bend projection of the said forming bar and means forcing a portion of the said sheet material against the juncture between the first portion and second portion of the bottom surface of the forming plate to conform the sheet material to said angle the means for forming including a groove in the second portion of the top surface with a mass of urethane rubber in the groove having an area sufficient to force part of the sheet material into conformity with the angle at the juncture when the forming bar is in its second position.
Claim 2
Independent Claim
284 words
A device for forming a hook end for sheet material with a secondary bend closely spaced to the hook end comprising a base member having a top surface with an end face, a forming bar positioned above said top surface, said forming bar movable from a position above said top surface to a second position closely spaced to said top surface, said forming bar having a projection terminating in a radius bend, said projection overlying a portion of said top surface and extending beyond said end face when in said second position, said forming bar having a bottom surface with a first portion including a portion of said projection, a second portion of said bottom surface projecting at an angle to the first portion, the juncture of the first and second portions overlying a second portion of the top surface, means for inserting an end portion of a strip of sheet material between said top surface and said bottom surface with a portion extending beyond the said end face, means for bending the said portion of the sheet material extending beyond the said end face around the said radius bend projection of the said forming bar and means forcing a portion of the said sheet material against the juncture between the first portion and second portion of the bottom surface of the forming plate to conform the sheet material to said angle the means for forming including a groove in the second portion of the top surface with a mass of urethane rubber in the groove having an area sufficient to force part of the sheet material into conformity with the angle at the juncture when the forming bar is in its second position.
Claim 3
Independent Claim
152 words
The method of forming a hooked end on a strip of sheet material with a secondary angled bend spaced from the hook using a forming bar having a radius bend projection and an angled undersurface which comprises the steps of: providing a surface having a channel therein, providing a mass of urethane rubber in the channel having an area greater then the channel, enclamping the end portion of a sheet material between the surface and the forming bar with the angle of the forming bar overlying the channel by moving the forming bar towards the channel, pressing the forming bar against the sheet material and the sheet material against the urethane rubber, flowing the urethane rubber to fill the channel and to pressure the sheet material against the angled surface of the forming bar and bending the end of the sheet material around the radius bend projection, and withdrawing the forming bar.
Claim 4
Independent Claim
152 words
The method of forming a hooked end on a strip of sheet material with a secondary angled bend spaced from the hook using a forming bar having a radius bend projection and an angled undersurface which comprises the steps of: providing a surface having a channel therein, providing a mass of urethane rubber in the channel having an area greater then the channel, enclamping the end portion of a sheet material between the surface and the forming bar with the angle of the forming bar overlying the channel by moving the forming bar towards the channel, pressing the forming bar against the sheet material and the sheet material against the urethane rubber, flowing the urethane rubber to fill the channel and to pressure the sheet material against the angled surface of the forming bar and bending the end of the sheet material around the radius bend projection, and withdrawing the forming bar.
Claim 5
Dependent Claim
30 words
The device of claim 1 wherein the urethane rubber has a free configuration with a top surface having a portion thereof lying above the top surface of the base member.
Claim 6
Dependent Claim
43 words
The device of claim 3, wherein the urethane rubber has a peaked top surface, the peak positioned behind the junction of the first and second portions of the bottom surface of the forming bar when the forming bar is in its second position.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |