US3600927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Necking die with floating center post
Assignee: Continental Can Co Inc
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Filing: 1968-12-30
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Granted: 1971-08-24
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Expires: 1988-12-30
Abstract
Abstract This disclosure relates to a die assembly for changing the diameter of end portions of cylindrical members having at least one circumferential wall portion of an increased effective thickness. Basically the die assembly is formed of a ring member and a post member with one of the members being floatingly mounted relative to the other member to permit the members to position themselves in accordance with the circumferential position of the wall portion of an increased effective thickness, thereby providing for a tightening up of die clearances which permits keeping the metal of the member being reshaped under better control and eliminating wrinkles. The die assembly is particularly adapted for necking down end portions of can bodies having lap seams.
Inventors
- 👤 Richard O Wahler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:14
CPC Classifications
B; B21; B21D; B21D41/00; B21D41/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
204 words
A die assembly for necking-in an end portion of a cylindrical member to define a cylindrical end portion of reduced diameter, said die assembly comprising a ring member for effecting the necking-in of a cylindrical member and a post member for limiting the necking-in effected by said ring member, said ring member having a bore of a diameter to receive a cylindrical member necked-in end portion and said post member being of a size to be received in a cylindrical member necked-in end portion, said die assembly being particularly adapted for use with cylindrical members having a circumferential wall portion of a greater thickness than other wall portions, and said die assembly including means for facilitating the reception of said thicker circumferential wall portion without orientation, said means including means mounting a selected one member of said ring member and said post member for limited radial floating movement relative to the other member of said ring member and said post member, the total clearance between said ring member bore and said post member being generally equal to the normal clearance for said die assembly plus the wall thickness increase of said thicker circumferential wall portion of tubular members which said die assembly is constructed.
Claim 2
Dependent Claim
204 words
A die assembly for necking-in an end portion of a cylindrical member to define a cylindrical end portion of reduced diameter, said die assembly comprising a ring member for effecting the necking-in of a cylindrical member and a post member for limiting the necking-in effected by said ring member, said ring member having a bore of a diameter to receive a cylindrical member necked-in end portion and said post member being of a size to be received in a cylindrical member necked-in end portion, said die assembly being particularly adapted for use with cylindrical members having a circumferential wall portion of a greater thickness than other wall portions, and said die assembly including means for facilitating the reception of said thicker circumferential wall portion without orientation, said means including means mounting a selected one member of said ring member and said post member for limited radial floating movement relative to the other member of said ring member and said post member, the total clearance between said ring member bore and said post member being generally equal to the normal clearance for said die assembly plus the wall thickness increase of said thicker circumferential wall portion of tubular members which said die assembly is constructed.
Claim 3
Dependent Claim
77 words
The die assembly of claim 1 wherein said post member and said ring member are carried by a support, said one member being floatingly secured to said support and the other of said members being fixedly secured to said support, and cooperating means on said support and said one member limiting movement of said one member towards said other member to a distance generally equal to the wall thickness of a cylindrical member to be worked upon.
Claim 4
Dependent Claim
31 words
The die assembly of claim 2 wherein said cooperating means includes a cylindrical extension on said one member and a slightly larger cylindrical socket in said support receiving said cylindrical extension.
Claim 5
Dependent Claim
56 words
The die assembly of claim 1 wherein said die assembly is particularly adapted for reshaping can body end portions having lap seams, said ring member is fixed, and said post member is mounted for floating movement in accordance with the position of the lap seam of the can body being operated on by said die assembly.
References Cited (Backward Citations)
US3344647A
Cited
US3468153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |