US3797429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for necking and flanging can bodies
Assignee: United Can Co
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Filing: 1973-02-22
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Granted: 1974-03-19
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Expires: 1993-02-22
Abstract
Abstract A cylindrical can body is positioned between axially aligned necking and flanging dies which are forced together so that the dies force the can body ends completely into and onto the dies to neck and flange the can body ends. The dies are then pulled apart, with the can body being first clamped to the flanging die to pull the necked end of the can body from the necking die. The can body is gripped and held between its ends to allow the flanging die to be then pulled off the flanged end of the can body.
Inventors
- 👤 W Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:50
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/2615; B21D51/2638; B21D51/263
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
260 words
Apparatus for simultaneously necking and flanging a can body comprising: a necking die holder and flanging die holder mounted for movement towards and away from each other, necking die means for forming a reduced-diameter neck on the end of a can body when a can body end is forced thereinto, said necking die means being carried by said necking die holder for movement therewith, a flanging die carried by said flanging die holder, said flanging die having a cylindrical pilot portion adapted to be inserted into the end of a can body and an outwardly curved die surface at the end of said pilot portion for flaring the end of a can body to form an outwardly projecting end flange thereon, said necking die means and said flanging die being coaxial and spaced from each other, means for gripping the exterior of a can body between the ends thereof and for holding said can body coaxial with said necking die means and said flanging die means, means for forcing said necking die holder and flanging die holders towards and way from each other, can body clamp means having clamp surface thereon, means mounting said can body clamp on said flanging die holder for movement therewith, and for movement thereon whereby said clamp surface of said clamp moves towards and away from engagement with said cylindrical pilot portion of said flanging die adjacent the outwardly curved die surface thereof, means for forcing said clamp surface towards said cylindrical portion of said flanging die and for moving said clamp surface away therefrom.
Claim 2
Dependent Claim
260 words
Apparatus for simultaneously necking and flanging a can body comprising: a necking die holder and flanging die holder mounted for movement towards and away from each other, necking die means for forming a reduced-diameter neck on the end of a can body when a can body end is forced thereinto, said necking die means being carried by said necking die holder for movement therewith, a flanging die carried by said flanging die holder, said flanging die having a cylindrical pilot portion adapted to be inserted into the end of a can body and an outwardly curved die surface at the end of said pilot portion for flaring the end of a can body to form an outwardly projecting end flange thereon, said necking die means and said flanging die being coaxial and spaced from each other, means for gripping the exterior of a can body between the ends thereof and for holding said can body coaxial with said necking die means and said flanging die means, means for forcing said necking die holder and flanging die holders towards and way from each other, can body clamp means having clamp surface thereon, means mounting said can body clamp on said flanging die holder for movement therewith, and for movement thereon whereby said clamp surface of said clamp moves towards and away from engagement with said cylindrical pilot portion of said flanging die adjacent the outwardly curved die surface thereof, means for forcing said clamp surface towards said cylindrical portion of said flanging die and for moving said clamp surface away therefrom.
Claim 3
Dependent Claim
54 words
Apparatus as set forth in claim 1 wherein said can body clamp means has two clamp surfaces diametrically opposite to each other relative to the axis of said flanging die, each clamp surface having an arcuate surface thereon, the curvature of said surfaces being complementary to the cylindrical pilot portion of said flanging die.
Claim 4
Dependent Claim
16 words
Apparatus as set forth in claim 2 wherein said clamp surfaces are made of plastic material.
Claim 5
Dependent Claim
86 words
Apparatus as set forth in claim 1, wherein said means for moving said clamp surface of said can body clamp away from the pilot portion of said flanging die comprises a spring and wherein said means for forcing said clamp surface of said can body clamp towards said pilot surface includes a piston engageable with said can body clamp and a controllable source of fluid under pressure for forcing said piston in a direction to move said can body clamp against the bias of said spring.
Claim 6
Independent Claim
192 words
A method of necking one end of a can body with a necking die which forms a shoulder and reduced-diameter cylindrical neck on the end of a can body and flanging the other end of the can body with a flanging die which forms an outwardly extending flange on the end of a can body, the method comprising: inserting the flanging die partially in one end of a can body and inserting the other end of the can body partially into the necking die, forcing the dies relatively towards each other to insert the flanging die completely into the can body and to insert the can body completely into the necking die, clamping the can body to the flanging die adjacent the flange formed on the can body, forcing the dies relatively apart while maintaining the can body clamped to the flanging die during at least the intial stripping of the necked end of the can body from the necking die and then unclamping the can body from the flanging die, gripping the exterior of the can body between its ends while relatively moving the gripped can and flanging die axially apart.
Claim 7
Independent Claim
192 words
A method of necking one end of a can body with a necking die which forms a shoulder and reduced-diameter cylindrical neck on the end of a can body and flanging the other end of the can body with a flanging die which forms an outwardly extending flange on the end of a can body, the method comprising: inserting the flanging die partially in one end of a can body and inserting the other end of the can body partially into the necking die, forcing the dies relatively towards each other to insert the flanging die completely into the can body and to insert the can body completely into the necking die, clamping the can body to the flanging die adjacent the flange formed on the can body, forcing the dies relatively apart while maintaining the can body clamped to the flanging die during at least the intial stripping of the necked end of the can body from the necking die and then unclamping the can body from the flanging die, gripping the exterior of the can body between its ends while relatively moving the gripped can and flanging die axially apart.
Claim 8
Dependent Claim
131 words
A method as set forth in claim 5 and further including holding said can body against axial movement during initial insertion of the flanging die in one end of the can body And initial insertion of the other end of the can body into the necking die, moving both of said dies towards each other to form the flange and shoulder simultaneously on the can body ends, holding said flanging die against axial movement after the can body has been flanged and moving said necking die axially towards said flanging die to form the neck on said can body, holding said flanging die against axial movement until the flanged can body end is unclamped therefrom and holding the can body against axial movement as the flanging die is moved axially therefrom.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |