US4065951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Split punch for drawing and ironing containers
Assignee: Rexam Beverage Can Co
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Filing: 1976-11-03
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Granted: 1978-01-03
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Expires: 1996-11-03
Abstract
Abstract A split punch tool for cooperating with a die block to form the wall of a drawn and ironed container is disclosed herein. The split punch or cooperating die includes a female portion that has a peripheral lip that can be placed in overhanging relation to the periphery of the die block and the female portion has a peripheral ledge which extends perpendicular to the direction of movement of the die block and die with respect to each other and also an inclined surface extending from the inner edge of the ledge or inwardly directed surface. The surfaces are adapted to engage mating surfaces defined on the end of a cylindrical member that forms part of the cooperating die so that the ledge defines a perpendicular support for the cylindrical member.
Inventors
- 👤 Seung W. Lyu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:52
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/20; B21D22/28; B21D22/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
167 words
Apparatus for forming a wall of a circular container including a bottom wall and a sidewall comprising a die block adapted to engage an outer surface of said bottom wall and a cooperating die adapted to engage an inner surface of said bottom wall and sidewall, said cooperating die including a female portion cooperating with said die block and having a peripheral lip adapted to be placed in overhanging relation to the periphery of said die block, said female portion having a peripheral inwardly directed surface extending perpendicular to an axis for said female portion to define a peripheral ledge above said peripheral lip, said female portion having an inclined surface extending from an inner edge of said inwardly directed surface, said cooperating die including a cylindrical member having an end surface corresponding to and engaging said inwardly directed surface and said inclined surface so that said ledge defines a support extending perpendicular to the path of relative movement of said die block and said cooperating die.
Claim 2
Dependent Claim
167 words
Apparatus for forming a wall of a circular container including a bottom wall and a sidewall comprising a die block adapted to engage an outer surface of said bottom wall and a cooperating die adapted to engage an inner surface of said bottom wall and sidewall, said cooperating die including a female portion cooperating with said die block and having a peripheral lip adapted to be placed in overhanging relation to the periphery of said die block, said female portion having a peripheral inwardly directed surface extending perpendicular to an axis for said female portion to define a peripheral ledge above said peripheral lip, said female portion having an inclined surface extending from an inner edge of said inwardly directed surface, said cooperating die including a cylindrical member having an end surface corresponding to and engaging said inwardly directed surface and said inclined surface so that said ledge defines a support extending perpendicular to the path of relative movement of said die block and said cooperating die.
Claim 3
Dependent Claim
32 words
Apparatus as defined in claim 1, in which said peripheral lip is arcuate in cross section and said ledge has a width that is less than the radius of said peripheral lip.
Claim 4
Dependent Claim
17 words
Apparatus as defined in claim 2, in which said ledge has a width greater than 0.025 inches.
Claim 5
Dependent Claim
17 words
Apparatus as defined in claim 1, in which said ledge has a width of approximately 0.040 inches.
Claim 6
Dependent Claim
174 words
Apparatus for forming a wall of a circular container including a bottom wall and a sidewall comprising a die block adapted to engage an outer surface of said bottom wall and a cooperating die adapted to engage an inner surface of said bottom wall and sidewall, said cooperating die including a female portion cooperating with said die block and a cylindrical sleeve having a cylindrical axis and cooperating with said female portion and movable with resepct to said female portion, said female portion having a peripheral inwardly directed substantially flat surface extending perpendicular to the axis for said cylindrical sleeve to define a peripheral annular ledge adjacent said cylindrical sleeve, said female portion having an annular inclined flat surface extending from an inner edge of said ledge and converging toward said axis, said cylindrical sleeve having an end surface corresponding to and engaging said inwardly directed surface and said inclined surface so that said ledge defines a support extending perpendicular to the path of relative movements of said die block and said cooperating die.
Claim 7
Dependent Claim
174 words
Apparatus for forming a wall of a circular container including a bottom wall and a sidewall comprising a die block adapted to engage an outer surface of said bottom wall and a cooperating die adapted to engage an inner surface of said bottom wall and sidewall, said cooperating die including a female portion cooperating with said die block and a cylindrical sleeve having a cylindrical axis and cooperating with said female portion and movable with resepct to said female portion, said female portion having a peripheral inwardly directed substantially flat surface extending perpendicular to the axis for said cylindrical sleeve to define a peripheral annular ledge adjacent said cylindrical sleeve, said female portion having an annular inclined flat surface extending from an inner edge of said ledge and converging toward said axis, said cylindrical sleeve having an end surface corresponding to and engaging said inwardly directed surface and said inclined surface so that said ledge defines a support extending perpendicular to the path of relative movements of said die block and said cooperating die.
Claim 8
Dependent Claim
23 words
Apparatus as defined in claim 5, in which said peripheral annular ledge has a width in the range of 0.025 to 0.065 inches.
Claim 9
Dependent Claim
19 words
Apparatus as defined in claim 5, in which said peripheral annular ledge has a width of approximately 0.040 inches.
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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |