Patent US3678725A successfully refreshed from Google Patents.
US3678725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container forming apparatus
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1970-10-19
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Granted: 1972-07-25
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Expires: 1990-10-19
Abstract
Abstract Container forming press comprised of a combined punch, drawing die, and stripper means for effecting the formation of and ejection of a container from the press during a full cycling of the same. The press further includes an improved electrofluidic control system connected to the punch and drawing die means which operates to detect malformed containers and to stop the apparatus so that the malformed containers can be removed.
Inventors
- 👤 Cornelis Langewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:02
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/20; B21D22/24; B21D45/00; B21D45/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
34 words
A press as set forth in claim 1 in which said cup-shaping die means is comprised of a fixed portion and a movable portion operatively associated therewith with said movable portion having said pocket.
Claim 2
Dependent Claim
32 words
A press as set forth in claim 1 in which said cup-shaping die means includes means for serving a disc-shaped workpiece from a length of sheet stock intermittently fed to said press.
Claim 3
Dependent Claim
46 words
A press as set forth in claim 1 in which said solid punch means includes atmospheric venting means in order to prevent the creation of a vacuum between said solid punch means and a formed container upon stripping of the container from said solid punch means.
Claim 4
Dependent Claim
19 words
A press as set forth in claim 1 in which said cup-shaping die means is provided with workholder means.
Claim 5
Dependent Claim
218 words
A press of the type described comprising a selectively movable hollow punch means and a selectively movable solid punch means receivable within the hollowed-out portion of the first punch means, a cup-shaping die means interposed between said hollow and solid punch means and provided with a pocket for selectively receiving said hollow punch means as well as a workpiece, means for moving said hollow punch means into engagement with the workpiece held in the pocket of said cup-shaping die means in order to initially draw the workpiece into a cup, means including said solid punch means for progressively displacing the cup-shaped workpiece from the pocket of said cup-shaping die means while at the same time reversely redrawing and reshaping the cup-shaped workpiece into a container about the forming end of said solid punch means upon insertion of said solid punch means into the interior of said hollow punch means, means carried by said solid punch means for directing a gaseous medium against selected portions of the workpiece for detecting a malformed container and for operating a control mechanism that stops the press upon such detection, and shoulder-like means provided at the forward end and within the interior of said hollow punch means for engaging and stripping a cOntainer from said solid punch means during operation of said press.
Claim 6
Dependent Claim
48 words
A press as set forth in claim 6 in which said solid punch means also includes an atmospheric venting means in order to prevent the creation of a vacuum between said solid punch means and a formed container during stripping of the container from said solid punch means.
Claim 7
Dependent Claim
20 words
A press set forth in claim 6 in which the cup-shaping die means is comprised of fixed and movable portions.
Claim 8
Dependent Claim
239 words
A press of the type described comprising a movable hollow punch means and a movable solid punch means receivable within the hollowed-out portion of said first punch means, a cup-shaping die means interposed between said hollow and solid punch means and comprised of a fixed portion and a movable portion, said movable portion having a pocket for selectively receiving said hollow punch means and workpiece, means for moving said hollow punch means into engagement with the workpiece held in said pocket in order to effect drawing of the workpiece between said hollow punch means and the movable portion of said cup-shaping die means so as to effect formation of the workpiece into a cup, means including the solid punch means for progressively displacing the workpiece from the said pocket while at the same time reversely redrawing and reshaping the cup-shaped workpiece into a container about the forming end of said solid punch means upon advancement of said solid punch means into the interior of said hollow punch means, means carried by said solid punch means for directing a gaseous medium against selected portions of the workpiece for detecting a malformed container container and for operating a control mechanism that stops the press upon such detection, and said hollow punch means including a shoulder-like means disposed in the interior of said hollow punch means for engaging and stripping a container from said solid punch means during operation of the press.
Claim 9
Dependent Claim
57 words
A press as set forth in claim 9 including guides means for maintaining said hollow and solid punch means and the movable portion of said cup-shaping die means in alignment relative to the fixed portion of said cup-shaping die means during relative movements of the said punch means and the movable portion of said cup-shaping die means.
Claim 10
Dependent Claim
44 words
A press as set forth in claim 9 including crank rod means connected to said hollow and solid punch means and to the movable portion of said die means for effecting relative movements of said hollow and solid punch means and said movable portion.
Claim 11
Dependent Claim
20 words
A press as set forth in claim 9 in which said gaseous medium detecting means comprises an air jet means.
Claim 12
Dependent Claim
18 words
A press as set forth in claim 12 in which said control mechanism comprises a fluidically-actuated electromechanical device.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |