Patent US4372492A successfully refreshed from Google Patents.
Patent US3924436A successfully refreshed from Google Patents.
US3924436A
Expired / Lapsed
US
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Method and apparatus for forming cup-shaped metal articles
Assignee: Individual
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Filing: 1973-06-25
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Granted: 1975-12-09
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Expires: 1993-06-25
Abstract
Abstract A punch and a plurality of dies are mounted for simultaneous movement toward and away from each other. A metal blank is positioned adjacent the dies. As the dies and punch move toward each other, the punch forces the blank through the dies, thus forming the article. As the punch and dies are separated, the formed article is removed from the punch.
Inventors
- 👤 Kazunaga Misonoo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:21
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D22/00; B21D22/20; B21D22/28; B21D22/30; B21D24/00; B21D45/00; B21D45/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
141 words
A method of forming cup-shaped metal articles by means of at least one die and a punch, said method comprising: positioning a metal blank adjacent said at least one die; simultaneously moving said punch and said at least one die from spaced apart withdrawn positions thereof toward each other to adjacent forming positions thereof, thereby causing said punch to force said blank through said at least one die and forming said metal article; simultaneously moving said punch and said at least one die away from each other; and removing said thus formed metal article from said punch, said step of removing said formed metal article from said punch comprising moving a knockout punch which is coaxially positioned within said punch longitudinally outwardly of said punch toward said at least one die to a position beyond said forming position of said punch.
Claim 2
Independent Claim
141 words
A method of forming cup-shaped metal articles by means of at least one die and a punch, said method comprising: positioning a metal blank adjacent said at least one die; simultaneously moving said punch and said at least one die from spaced apart withdrawn positions thereof toward each other to adjacent forming positions thereof, thereby causing said punch to force said blank through said at least one die and forming said metal article; simultaneously moving said punch and said at least one die away from each other; and removing said thus formed metal article from said punch, said step of removing said formed metal article from said punch comprising moving a knockout punch which is coaxially positioned within said punch longitudinally outwardly of said punch toward said at least one die to a position beyond said forming position of said punch.
Claim 3
Dependent Claim
31 words
A method as claimed in claim 1, wherein said at least one die comprises a plurality of dies, and said punch forces said blank through each of said plurality of dies.
Claim 4
Dependent Claim
21 words
A method as claimed in claim 2, wherein said blank is simultaneously passed through two adjacent of said plurality of dies.
Claim 5
Independent Claim
159 words
An apparatus for forming cup-shaped metal articles from a metal blank, said apparatus comprising: a frame having a slideway surface thereon; a punch and at least one die mounted to move toward and away from each other on said slideway surface; means for selectively positioning a metal blank adjacent said at least one die; means for simultaneously moving said punch and said at least one die from spaced apart withdrawn positions thereof toward each other to adjacent forming positions thereof and for causing said punch to force said metal blank through said at least one die, thereby forming said cup-shaped metal article; and means for removing the thus formed cup-shaped metal article from said punch, said means for removing comprising a knockout punch coaxially and longitudinally movably positioned within said punch, and means for moving said knockout punch longitudinally outwardly of said punch toward said at least one die to a position beyond said forming position of said punch.
Claim 6
Independent Claim
159 words
An apparatus for forming cup-shaped metal articles from a metal blank, said apparatus comprising: a frame having a slideway surface thereon; a punch and at least one die mounted to move toward and away from each other on said slideway surface; means for selectively positioning a metal blank adjacent said at least one die; means for simultaneously moving said punch and said at least one die from spaced apart withdrawn positions thereof toward each other to adjacent forming positions thereof and for causing said punch to force said metal blank through said at least one die, thereby forming said cup-shaped metal article; and means for removing the thus formed cup-shaped metal article from said punch, said means for removing comprising a knockout punch coaxially and longitudinally movably positioned within said punch, and means for moving said knockout punch longitudinally outwardly of said punch toward said at least one die to a position beyond said forming position of said punch.
Claim 7
Dependent Claim
18 words
An apparatus as claimed in claim 4, wherein said at least one die comprises a plurality of dies.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |