US3745804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container forming apparatus
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1971-12-20
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Granted: 1973-07-17
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Expires: 1991-12-20
Abstract
Abstract Container forming apparatus provided with an improved sleevelike element for engaging and precisely orienting a cup-shaped metal workpiece such as one made of aluminum relative to a set of dies during the forward advance of a ram or punch relative to the dies whereby the workpiece can be properly presented and fed to the dies.
Inventors
- 👤 C Langewis
- 👤 A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:22
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/20; B21D22/30; B21D24/00; B21D24/10; B21D24/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
252 words
An apparatus for forming deep drawn metal containers, said apparatus comprising a forming punch and cooperating die means, a movable sleeve for concentrically and slidably supporting said punch and a shallow cup-shaped metal workpiece adjacent the entry end of said die means, an overall drive means for moving said punch relative to said sleeve and into and out of said die means, said drive means including a fluid actuator means connected directly to said sleeve for moving said sleeve along with the workpiece relative to said die means independently of but in synchronization with said punch, means for synchronizing the movements of said punch and said sleeve relative to said die means whereby the sleeve can initially receive and center the workpiece relative to said punch and said die means prior to the entrance of said punch along with the workpiece into said die means, a fluid intensifier means connected to said fluid actuator means for maintaining the fluid of said actuator means at a selected pressure level whereby said sleeve will hold the workpiece after contacting the same in the desired position relative to said punch and under selected pressure against the die means until the workpiece is removed from said sleeve by said punch as the punch moves forward toward and into the die means, and a fluid operated sleeve biasing means also connected to said sleeve in opposing relation to said fluid actuator means and said fluid biasing means being operative to return said sleeve to a retracted position.
Claim 2
Independent Claim
252 words
An apparatus for forming deep drawn metal containers, said apparatus comprising a forming punch and cooperating die means, a movable sleeve for concentrically and slidably supporting said punch and a shallow cup-shaped metal workpiece adjacent the entry end of said die means, an overall drive means for moving said punch relative to said sleeve and into and out of said die means, said drive means including a fluid actuator means connected directly to said sleeve for moving said sleeve along with the workpiece relative to said die means independently of but in synchronization with said punch, means for synchronizing the movements of said punch and said sleeve relative to said die means whereby the sleeve can initially receive and center the workpiece relative to said punch and said die means prior to the entrance of said punch along with the workpiece into said die means, a fluid intensifier means connected to said fluid actuator means for maintaining the fluid of said actuator means at a selected pressure level whereby said sleeve will hold the workpiece after contacting the same in the desired position relative to said punch and under selected pressure against the die means until the workpiece is removed from said sleeve by said punch as the punch moves forward toward and into the die means, and a fluid operated sleeve biasing means also connected to said sleeve in opposing relation to said fluid actuator means and said fluid biasing means being operative to return said sleeve to a retracted position.
Claim 3
Dependent Claim
18 words
An apparatus as set forth in claim 1 in which said die means includes a straight redraw die.
Claim 4
Dependent Claim
18 words
An apparatus as set forth in claim 1 in which said die means includes a reverse redraw die.
Claim 5
Dependent Claim
22 words
An apparatus as set forth in claim 1 including means connected to said fluid actuator means for automatically replenishing fluid lost therefrom.
Claim 6
Dependent Claim
28 words
An apparatus as set forth in claim 1 wherein the outer end of said sleeve is provided with a ledge for initially receiving and centering a cup-shaped workpiece.
Claim 7
Dependent Claim
32 words
An apparatus as set forth in claim 1 in which said synchronizing means is comprised of a timing cam interposed between and operatively connected to said drive means and said actuator means.
Claim 8
Dependent Claim
21 words
An apparatus as set forth in claim 1 in which said fluid actuator means is comprised of a cam actuated piston.
Claim 9
Dependent Claim
28 words
An apparatus as set forth in claim 1 including means connected to said fluid sleeve biasing means for automatically replenishing fluid lost therefrom upon operation of said apparatus.
Claim 10
Dependent Claim
25 words
An apparatus as set forth in claim 1 including common means for replenishing fluid lost from said fluid actuator means and said sleeve biasing means.
Claim 11
Dependent Claim
31 words
An apparatus as set forth in claim 1 including means connected to said intensifier as well as to said sleeve biasing means for adjusting the workpiece clamping pressure of said sleeve.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |