US4516420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell tooling
Assignee: Stolle Machinery Co LLC
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Filing: 1983-06-10
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Granted: 1985-05-14
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Expires: 2003-06-10
Abstract
Abstract A method and apparatus for forming end panels or shells for two-piece cans includes incorporation of the tooling necessary to form the panel within a double acting press. The tooling includes a fluid actuated hold down sleeve, carried by the outer slide of the press, which is capable of being moved into holding engagement with the metal from which the panel is formed. The inner slide of the press carries a punch which is movable into forming engagement with the metal and the outer slide carries tooling which is capable of blanking the metal against a cut edge carried by the fixed lower platen of the press. The chuck wall of the end panel is then preliminarily formed by the action of the punch drawing the blank around the fixed radius of a die core member fixedly carried by the bottom press platen. Further downward movement of the punch drapes the metal about the radius just referred to and finally sets the chuck wall against a fluid supported cushioning member carried by the lower platen so that, in effect, a reverse draw about the periphery of a fixed die core center is achieved. The method of this invention includes utilization of the apparatus just described and primarily relates to the cushioning and reverse draw action for finally setting the chuck wall.
Inventors
- 👤 Joseph D. Bulso, Jr.
- 👤 Stephen D. Doyle
- 👤 James A. McClung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:11
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/44
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
232 words
Apparatus for forming an end panel from a blank of metal in a double acting press having inner and outer slides and a lower platen, comprising: (A) fluid actuated pressure means, carried by the outer slide of the press and being movable into holding engagement with the metal; (B) blanking means carried by the outer slide of the press and the fixed lower platen thereof; (C) forming means carried by the inner slide of the press for forming the panel; (D) die means carried by the lower platen for initially forming a chuck wall of the panel in cooperation with said blanking means and said forming means; (E) cushioning means carried by the lower platen and resiliently supporting the panel in the chuck wall area against the force of the forming means during final formation of the chuck wall; (F) said die means including a die core fixed to said lower platen and a die core ring carried by said lower platen in encircling relationship with said die core, said blanking means on said lower platen encircling said die core ring and being spaced therefrom so that said outer slide blanking means telescopically moves over said die core ring between said lower platen blanking means and die core ring to initially form said chuck wall; and (G) said cushioning means including a piston between said die core and said die core ring.
Claim 2
Dependent Claim
232 words
Apparatus for forming an end panel from a blank of metal in a double acting press having inner and outer slides and a lower platen, comprising: (A) fluid actuated pressure means, carried by the outer slide of the press and being movable into holding engagement with the metal; (B) blanking means carried by the outer slide of the press and the fixed lower platen thereof; (C) forming means carried by the inner slide of the press for forming the panel; (D) die means carried by the lower platen for initially forming a chuck wall of the panel in cooperation with said blanking means and said forming means; (E) cushioning means carried by the lower platen and resiliently supporting the panel in the chuck wall area against the force of the forming means during final formation of the chuck wall; (F) said die means including a die core fixed to said lower platen and a die core ring carried by said lower platen in encircling relationship with said die core, said blanking means on said lower platen encircling said die core ring and being spaced therefrom so that said outer slide blanking means telescopically moves over said die core ring between said lower platen blanking means and die core ring to initially form said chuck wall; and (G) said cushioning means including a piston between said die core and said die core ring.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1 wherein said cushioning means are received in the fixed platen in opposed relationship with said forming means; said cushioning means being fluid actuated.
Claim 4
Dependent Claim
33 words
The apparatus of claim 1 wherein said forming means include a punch core carried by the inner slide; and said die core ring is carried by said fixed platen in opposed relationship thereto.
Claim 5
Dependent Claim
17 words
The apparatus of claim 1 wherein said forming means and said die means include panel removal means.
Claim 6
Dependent Claim
278 words
Apparatus for forming an end panel from a blank of metal in a double acting press having inner and outer slides and a fixed lower platen, comprising: (A) fluid actuated pressure means, carried by the outer slide of the press and being movable into holding engagement with the metal; (B) a blanking member carried by the outer slide of the press and movable therewith; (C) a cut edge, fixed to the lower platen of the press for cooperation with said blanking member; (D) a punch core carried by the inner slide of the press for movement therewith; (E) a die core carried by the fixed lower platen of the press in opposed relationship with said punch core for cooperation with said punch core for initially forming a chuck wall of the end panel; (F) a die core ring carried by the fixed lower platen of the press in encircling relationshp with said die core and in opposed relationship with said pressure means; (G) cushioning means, carried by said fixed lower platen of the press between said die core and said die core ring for cooperation with said punch core for finally forming the chuck wall of the end panel; and (H) a movable pressure sleeve disposed in encircling relationship with said die core ring and in opposed relation to said blanking member during a portion of its travel to hold the metal; said die core ring and cut edge being spaced from one another and said blanking member being movable into the space between said cut edge and said die core ring to engage a peripheral edge portion of the metal during initial forming of the chuck wall.
Claim 7
Dependent Claim
278 words
Apparatus for forming an end panel from a blank of metal in a double acting press having inner and outer slides and a fixed lower platen, comprising: (A) fluid actuated pressure means, carried by the outer slide of the press and being movable into holding engagement with the metal; (B) a blanking member carried by the outer slide of the press and movable therewith; (C) a cut edge, fixed to the lower platen of the press for cooperation with said blanking member; (D) a punch core carried by the inner slide of the press for movement therewith; (E) a die core carried by the fixed lower platen of the press in opposed relationship with said punch core for cooperation with said punch core for initially forming a chuck wall of the end panel; (F) a die core ring carried by the fixed lower platen of the press in encircling relationshp with said die core and in opposed relationship with said pressure means; (G) cushioning means, carried by said fixed lower platen of the press between said die core and said die core ring for cooperation with said punch core for finally forming the chuck wall of the end panel; and (H) a movable pressure sleeve disposed in encircling relationship with said die core ring and in opposed relation to said blanking member during a portion of its travel to hold the metal; said die core ring and cut edge being spaced from one another and said blanking member being movable into the space between said cut edge and said die core ring to engage a peripheral edge portion of the metal during initial forming of the chuck wall.
Claim 8
Dependent Claim
14 words
The apparatus of claim 5 wherein said cushioning means include a fluid actuated piston.
Claim 9
Dependent Claim
17 words
The apparatus of claim 5 wherein said punch core and said die core include panel removal means.
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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) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |