US3845653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double stage necking
Assignee: Continental Can Co Inc
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Filing: 1973-01-05
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Granted: 1974-11-05
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Expires: 1993-01-05
Abstract
Abstract This disclosure relates to the necking-in of can bodies for the purpose of applying smaller diameter or special ends thereon. Previously experienced extreme difficulties in properly neckingin can bodies have been eliminated by first necking-in a larger than normal end portion of a can body to an intermediate diameter and then utilizing tooling for performing the desired necking in operation to further neck-in the extreme end portion only of the previously necked-in longer end portion.
Inventors
- 👤 J Hilgenbrink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:20
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/2615; B21D51/2638; B65; B65D; B65D7/00; B65D7/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A method of necking-in thin wall can bodies to a degree heretofore impossible comprising the steps of necking-in an elongated end portion of a can body to a degree materially less than the desired degree of necking-in and then in a separate operation utilizing only an external die and a plug die further necking-in said previously necked-in portion to the desired degree, said further necking-in step being performed on a free end portion only of said necked-in elongated end portion said necked-in end portion includes an elongated cylindrical part, and said can body is supported adjacent said necked-in end portion during the further necking-in step and said necked-in end portion cylindrical part is separately supported during said further necking-in step adjacent that part of said necked-in portion being further necked-in.
Claim 2
Independent Claim
130 words
A method of necking-in thin wall can bodies to a degree heretofore impossible comprising the steps of necking-in an elongated end portion of a can body to a degree materially less than the desired degree of necking-in and then in a separate operation utilizing only an external die and a plug die further necking-in said previously necked-in portion to the desired degree, said further necking-in step being performed on a free end portion only of said necked-in elongated end portion said necked-in end portion includes an elongated cylindrical part, and said can body is supported adjacent said necked-in end portion during the further necking-in step and said necked-in end portion cylindrical part is separately supported during said further necking-in step adjacent that part of said necked-in portion being further necked-in.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |