Reinforced wall-ironed container and manufacture
Abstract
Abstract REINFORCING RIBS ARE PRODUCED ON THE SIDE WALLS OF A CONTAINER DURING AN IRONING OPERATION BY PLASTIC FLOW OF METAL OF THE SIDE WALLS INTO CIRCUMFERENTIAL GROOVES IN THE IRONING PUNCH. THE CONTAINER IS STRIPPED FROM THE PUNCH WITH RADIAL EXPANSION OF THE SIDE WALLS. IN MULTIPLE-RING IRONING, RIBS FORMED BY PASSAGE OF A FIRST IRONING RING ARE MOVED OUT OF THE GROOVES IN WHICH FORMED, ALONG THE PUNCH, AND INTO OTHER GROOVES, BY PASSAGE OF A SECOND IRONING RING WHICH EFFECTS ELONGATION AND THICKNESS REDUCTION OF THE SIDE WALLS. THE RIBS ARE RECEIVED IN THE OTHER GROOVES BEFORE BEING OVERTAKEN BY THE SECOND IRONING RING, TO PREVENT THEIR DESTRUCTION BY THE SECOND RING, THE REINFORCING RIBS PRODUCE A MARKED INCREASED IN BUCKLING RESISTANCE WITH A MINIMAL AMOUNT OF MATERIAL.
Inventors
- 👤 William D Swanson
- 👤 Edward P Spencer
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |