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US4017337A
Expired / Lapsed
US
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Method for preparing an aluminum clip
Assignee: Rio Tinto Switzerland AG
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Filing: 1975-04-09
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Granted: 1977-04-12
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Expires: 1995-04-09
Abstract
Abstract A clip exhibiting improved corrosion resistance and reduced weight is processed by a drawing operation which is preferably conducted without interannealing treatments and which may employ a variation of drawing speeds. The clip of the present invention is prepared from an aluminum base alloy comprising from about 0.05-6.0% silicon, about 0.10-0.8% iron, about 0.02-0.3% copper, up to 1.0% manganese and up to 7.0% magnesium. The resulting clips possess comparable tensile properties to conventional tin and zinc-coated steel clips with an economy of processing.
Inventors
- 👤 Joseph Winter
- 👤 Richard Lanam
- 👤 Douglas L. Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:18
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04; C22F1/05; C22F1/043; Y; Y10; Y10T; Y10T24/00; Y10T24/20; Y10T24/202; Y10T24/205; Y10T24/44; Y10T24/44641; Y10T24/44769; Y10T24/44778; Y10T24/44786
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
117 words
A method for the preparation of an aluminum paper clip possessing improved corrosion resistance and reduced weight which comprises: A. providing an aluminum base alloy in rod form, said aluminum base alloy consisting essentially of from about 0.05-6.0% silicon, from about 0.10-0.8% iron, from about 0.02-0.3% copper, from about 0.05-0.20% chromium, from about 0.05-0.20% manganese and from about 4.5-5.6% magnesium, balance aluminum; B. drawing said rod into wire of a diameter ranging from about 0.035-0.055 inches by a continual drawing operation which is conducted at a speed ranging from about 2,000 to about 4,000 feet per minute without an interannealing treatment; and C. bending a finite length of said wire into the shape of a paper clip.
Claim 2
Independent Claim
117 words
A method for the preparation of an aluminum paper clip possessing improved corrosion resistance and reduced weight which comprises: A. providing an aluminum base alloy in rod form, said aluminum base alloy consisting essentially of from about 0.05-6.0% silicon, from about 0.10-0.8% iron, from about 0.02-0.3% copper, from about 0.05-0.20% chromium, from about 0.05-0.20% manganese and from about 4.5-5.6% magnesium, balance aluminum; B. drawing said rod into wire of a diameter ranging from about 0.035-0.055 inches by a continual drawing operation which is conducted at a speed ranging from about 2,000 to about 4,000 feet per minute without an interannealing treatment; and C. bending a finite length of said wire into the shape of a paper clip.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein from about 0.05-0.20% chromium, up to about 0.2% titanium, and up to about 0.1% zinc are added to said alloy.
Claim 4
Dependent Claim
43 words
The method of claim 1 wherein silicon is present in a maximum amount of 0.30%, iron is present in a maximum amount of 0.40%, copper is present in a maximum amount of 0.10% and zinc is present in an amount up to 0.10%.
Claim 5
Dependent Claim
16 words
The method of claim 1 further including annealing said wire after the completion of said drawing.
Claim 6
Dependent Claim
23 words
The method of claim 4 wherein said annealing is conducted at a temperature ranging up to about 300° F for from 1-50 hours.
Claim 7
Dependent Claim
21 words
The method of claim 5 wherein said annealing is conducted at a temperature of about 275° F for about 3 hours.
Claim 8
Dependent Claim
11 words
The method of claim 1 wherein said diameter ranges from 0.036-0.048.
Claim 9
Dependent Claim
119 words
An aluminum paper clip possessing improved corrosion resistance and reduced weight, prepared from an aluminum base alloy consisting essentially of from about 0.05-6.0% silicon, from about 0.10-0.8% iron, from about 0.02-0.3% copper, from about 0.05-0.20% chromium, from about 0.05-0.20% manganese and from about 4.5-5.6% magnesium, balance aluminum, said clip prepared by a process which comprises: A. providing said aluminum base alloy in rod form; B. drawing said rod into wire of a diameter ranging from about 0.035-0.055 inches by a continual drawing operation which is conducted at a speed ranging from about 2,000 to about 4,000 feet per minute without an interannealing treatment; and C. bending a finite length of said wire into the shape of a paper clip.
Claim 10
Dependent Claim
119 words
An aluminum paper clip possessing improved corrosion resistance and reduced weight, prepared from an aluminum base alloy consisting essentially of from about 0.05-6.0% silicon, from about 0.10-0.8% iron, from about 0.02-0.3% copper, from about 0.05-0.20% chromium, from about 0.05-0.20% manganese and from about 4.5-5.6% magnesium, balance aluminum, said clip prepared by a process which comprises: A. providing said aluminum base alloy in rod form; B. drawing said rod into wire of a diameter ranging from about 0.035-0.055 inches by a continual drawing operation which is conducted at a speed ranging from about 2,000 to about 4,000 feet per minute without an interannealing treatment; and C. bending a finite length of said wire into the shape of a paper clip.
References Cited (Backward Citations)
US2501440A
Cited
US3232796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |