Method and device for bending wire-and band-shaped material to closed preferably annular shapes,particularly for automatic benders
Abstract
Abstract A METHOD AND DEVICE FOR BENDING A WIRE- OR A BANDSHAPED MATERIAL INTO A CLOSED SHAPE PREFERABLY AN ANGULAR ONE. IN THE METHOD THE ENDS OF THE MATERIAL TO BE BENT ARE BENT FIRST IN A QUARTER CIRCLE AND THEN IN THE SECOND STEP OF THE OPERATION THE CENTRAL SELECTION OF THE MATERIAL IS BENT IN A HALF CIRCLE. IN THE APPARATUS THE TOOLS ALL MOVE IN THE SAME DIRECTION WITH CENTRAL PORTION OF THE TOOL BEING SEPARATETLY MOVABLE TO HOLD THE MATERIAL TO BE BENT AGAINST A COUNTER BLOCK. AFTER THE OUTSIDE PORTIONS OF THE TOOL BEND THE QUARTER CIRCLES ON THE EXTREMITIES OF THE MATERIAL BY SHAPING IT OVER THE BLOCK, THAT PART OF THE BLOCK IS WITHDRAWN TO LEAVE A ROUND CENTRAL PORTION OVER WHICH THE REMAINING HALF CIRCLE IS BENT BY MOVEMENT OF THE CENTRAL PORTION OF THE TOOL.
Inventors
- 👤 Heinz Finzer
Bibliographic Details
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |