US4506533A
Expired / Lapsed
US
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Method of forming seamless drawn and ironed containers of aluminum stock
Assignee: Rexam Beverage Can Co
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Filing: 1984-01-19
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Granted: 1985-03-26
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Expires: 2004-01-19
Abstract
Abstract A method of forming a drawn and ironed aluminum container is disclosed herein. The aluminum stock material is initially provided with a thin layer of a particular lubricant applied to one or both surfaces thereof. The lubricant is unemulsified (i) peanut oil and/or (ii) certain oleic acid esters of aliphatic polyhydric alcohols. The method contemplates applying the thin layer of said lubricant to an aluminum stock, cutting a disc and forming a drawn and ironed container utilizing said lubricated disc without additional lubricant being applied to the tooling.
Inventors
- 👤 William Hessel
- 👤 Wayne D. Niemeyer
- 👤 Surya K. Misra
- 👤 Richard A. Openchowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:01
CPC Classifications
C; C10; C10M; C10M101/00; B; B21; B21D; B21D22/00; B21D22/20; B21D22/201; C10M101/04; C10M105/00; C10M105/08; C10M105/32; C10M105/38; C10M111/00; C10M111/02; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/40; C10M2207/404; C10N; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
122 words
A method of forming a seamless drawn and ironed container of aluminum stock, said container having a bottom wall and an integral sidewall, comprising the steps of (a) applying a thin layer of a lubricant to at least one of the two surfaces of said aluminum stock, said lubricant consisting essentially of unemulsified (i) peanut oil or (ii) at least one oleic acid ester of an aliphatic polyhydric alcohol containing at least three hydroxyl groups and wherein three or more of said hydroxyl groups of said aliphatic polyhydric alcohol are esterified with oleic acid, or mixtures of (i) and (ii); and (b) converting said aluminum stock into a drawn and ironed container from said stock material without applying any additional lubricant thereto.
Claim 2
Independent Claim
122 words
A method of forming a seamless drawn and ironed container of aluminum stock, said container having a bottom wall and an integral sidewall, comprising the steps of (a) applying a thin layer of a lubricant to at least one of the two surfaces of said aluminum stock, said lubricant consisting essentially of unemulsified (i) peanut oil or (ii) at least one oleic acid ester of an aliphatic polyhydric alcohol containing at least three hydroxyl groups and wherein three or more of said hydroxyl groups of said aliphatic polyhydric alcohol are esterified with oleic acid, or mixtures of (i) and (ii); and (b) converting said aluminum stock into a drawn and ironed container from said stock material without applying any additional lubricant thereto.
Claim 3
Independent Claim
75 words
A method of forming a seamless drawn and ironed container of aluminum stock, said container having a bottom wall and an integral sidewall, comprising the steps of (a) applying a thin layer of a lubricant consisting essentially of unemulsified peanut oil to at least one of the two surfaces of said aluminum stock; and (b) converting said aluminum stock into a drawn and ironed container from said stock material without applying any additional lubricant thereto.
Claim 4
Independent Claim
75 words
A method of forming a seamless drawn and ironed container of aluminum stock, said container having a bottom wall and an integral sidewall, comprising the steps of (a) applying a thin layer of a lubricant consisting essentially of unemulsified peanut oil to at least one of the two surfaces of said aluminum stock; and (b) converting said aluminum stock into a drawn and ironed container from said stock material without applying any additional lubricant thereto.
Claim 5
Dependent Claim
18 words
The method of claim 1, wherein the layer of said lubricant is about 0.5-3 mg./in. 2 film weight.
Claim 6
Dependent Claim
20 words
The method of claim 3, wherein the layer of said lubricant is about 1 to 2 mg./in. 2 film weight.
Claim 7
Dependent Claim
21 words
The method of claim 1, wherein the layer of the lubricant is applied to the two surfaces of said aluminum stock.
Claim 8
Dependent Claim
11 words
The method of claim 1, wherein said lubricant is sorbitol trioleate.
Claim 9
Dependent Claim
11 words
The method of claim 1, wherein said lubricant is glycerol trioleate.
Claim 10
Independent Claim
132 words
A method of forming a seamless drawn and ironed container of aluminum stock, said container having a bottom wall and an integral sidewall, comprising the steps of (a) applying a thin layer of a lubricant in the range of about 0.5-3 mg./in. 2 film weight to at least one of the two surfaces of said aluminum stock, said lubricant consisting essentially of unemulsified (i) peanut oil or (ii) at least one oleic acid ester of an aliphatic polyhydric alcohol containing at least three hydroxyl groups and wherein three or more of said hydroxyl groups of said aliphatic polyhydric alcohol are esterified with oleic acid, or mixtures of (i) and (ii); (b) converting said aluminum stock into a cup; and (c) forming a drawn and ironed container therefrom without applying additional lubricant thereto.
Claim 11
Independent Claim
132 words
A method of forming a seamless drawn and ironed container of aluminum stock, said container having a bottom wall and an integral sidewall, comprising the steps of (a) applying a thin layer of a lubricant in the range of about 0.5-3 mg./in. 2 film weight to at least one of the two surfaces of said aluminum stock, said lubricant consisting essentially of unemulsified (i) peanut oil or (ii) at least one oleic acid ester of an aliphatic polyhydric alcohol containing at least three hydroxyl groups and wherein three or more of said hydroxyl groups of said aliphatic polyhydric alcohol are esterified with oleic acid, or mixtures of (i) and (ii); (b) converting said aluminum stock into a cup; and (c) forming a drawn and ironed container therefrom without applying additional lubricant thereto.
Claim 12
Independent Claim
104 words
A method of forming a seamless aluminum container having integral bottom and sidewalls from an aluminum material, including the steps of (a) applying a thin layer of a lubricant to a surface of said aluminum material, said lubricant consisting essentially of unemulsified (i) peanut oil or (ii) at least one oleic acid ester of an aliphatic polyhydric alcohol containing at least three hydroxyl groups and wherein three or more of said hydroxyl groups of said aliphatic polyhydric alcohol are esterified with oleic acid, or mixtures of (i) and (ii); and (b) converting said aluminum material into said seamless container without applying additional lubricant thereto.
Claim 13
Independent Claim
104 words
A method of forming a seamless aluminum container having integral bottom and sidewalls from an aluminum material, including the steps of (a) applying a thin layer of a lubricant to a surface of said aluminum material, said lubricant consisting essentially of unemulsified (i) peanut oil or (ii) at least one oleic acid ester of an aliphatic polyhydric alcohol containing at least three hydroxyl groups and wherein three or more of said hydroxyl groups of said aliphatic polyhydric alcohol are esterified with oleic acid, or mixtures of (i) and (ii); and (b) converting said aluminum material into said seamless container without applying additional lubricant thereto.
Claim 14
Dependent Claim
21 words
The method of claim 1, in which cooling is effected during the ironing step using as the coolant essentially lubricant-free water.
Claim 15
Dependent Claim
21 words
The method of claim 2, in which cooling is effected during the ironing step using as the coolant essentially lubricant-free water.
Claim 16
Independent Claim
98 words
A method of forming a seamless drawn and ironed container having a bottom wall and an integral sidewall from aluminum stock material, comprising the steps of applying a thin layer of unemulsified peanut oil as the lubricant in the range of about 1 to about 2 mg/in. 2 thickness equivalent to one surface of said aluminum stock material, converting said aluminum stock material into a cup, and forming a drawn and ironed container from said aluminum stock material in a multi-staged ironing process while retaining at least some of said lubricant on said surface throughout said ironing process.
Claim 17
Independent Claim
98 words
A method of forming a seamless drawn and ironed container having a bottom wall and an integral sidewall from aluminum stock material, comprising the steps of applying a thin layer of unemulsified peanut oil as the lubricant in the range of about 1 to about 2 mg/in. 2 thickness equivalent to one surface of said aluminum stock material, converting said aluminum stock material into a cup, and forming a drawn and ironed container from said aluminum stock material in a multi-staged ironing process while retaining at least some of said lubricant on said surface throughout said ironing process.
Claim 18
Dependent Claim
21 words
A method as defined in claim 12, in which said thin layer has a thickness of about 1.25 mg/in. 2 .
Claim 19
Dependent Claim
44 words
A method as defined in claim 12, further including flowing a liquid water coolant to the other surface of said aluminum stock material while a drawn and ironed container is being ironed and in which said liquid water coolant is devoid of any lubricant.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |