US3581539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for drawing metal cups to can bodies
Assignee: Rio Tinto Switzerland AG
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Filing: 1968-09-09
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Granted: 1971-06-01
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Expires: 1988-09-09
Abstract
Abstract A method for drawing metal cups to can bodies has the steps of drawing the cups through several roll collars while spraying a lubricant in such a way that it lubricates the roll surfaces, the can body and the roll bearings, and also cools, and flushes fine substances. The device for the method has roll collars, a mandrel, ducts connected to a source of lubricant, and orifices for directing the lubricant in spray jets.
Inventors
- 👤 Wilhelm Friedrich Lauener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:51
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/14; B21D22/20; B21D22/21; B21D37/00; B21D37/18; B21D51/00; B21D51/16; B21D51/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
123 words
A method for drawing can bodies from metal cups, comprising the steps of placing a cup over a mandrel and forcing it upwardly through several drawing-roll collars, each collar being provided with a plurality of forming rolls, while directing a pressurized diluted lubricant spray in jets eccentrically or tangentially against the periphery of the rolls of each collar and putting them in motion in that sense of rotation which corresponds to the direction of movement of the can body during drawing, whereby the forming rolls of each collar receive additional propulsion by the eccentrically applied lubricant spray, and the forming surfaces of said rolls, the outer surfaces of the can body to be drawn, and the roll bearings are cleaned, cooled, and lubricated.
Claim 2
Independent Claim
123 words
A method for drawing can bodies from metal cups, comprising the steps of placing a cup over a mandrel and forcing it upwardly through several drawing-roll collars, each collar being provided with a plurality of forming rolls, while directing a pressurized diluted lubricant spray in jets eccentrically or tangentially against the periphery of the rolls of each collar and putting them in motion in that sense of rotation which corresponds to the direction of movement of the can body during drawing, whereby the forming rolls of each collar receive additional propulsion by the eccentrically applied lubricant spray, and the forming surfaces of said rolls, the outer surfaces of the can body to be drawn, and the roll bearings are cleaned, cooled, and lubricated.
Claim 3
Dependent Claim
150 words
A substantially vertically disposed device for drawing can bodies from metal cups, said device comprising at least two drawing-roll collars, each collar being provided with a plurality of forming rolls, said collars being pivoted on needle bearings, a mandrel having an upwardly directed front surface, a plurality of ducts having orifices and being connected to a source of lubricant under pressure, the orifices of said ducts being arranged o direct jets of pressurized lubricant eccentrically or tangentially against the peripheries of the rolls of each collar for putting the rolls in motion in that sense of rotation which corresponds to the direction of the can body during drawing, whereby the forming rolls of each collar receive additional propulsion by the eccentrically applied lubricant spray, and the forming surfaces of said rolls, the outer surfaces of the can body to be drawn, and the roll bearings are cleaned, cooled, and lubricated.
Claim 4
Dependent Claim
150 words
A substantially vertically disposed device for drawing can bodies from metal cups, said device comprising at least two drawing-roll collars, each collar being provided with a plurality of forming rolls, said collars being pivoted on needle bearings, a mandrel having an upwardly directed front surface, a plurality of ducts having orifices and being connected to a source of lubricant under pressure, the orifices of said ducts being arranged o direct jets of pressurized lubricant eccentrically or tangentially against the peripheries of the rolls of each collar for putting the rolls in motion in that sense of rotation which corresponds to the direction of the can body during drawing, whereby the forming rolls of each collar receive additional propulsion by the eccentrically applied lubricant spray, and the forming surfaces of said rolls, the outer surfaces of the can body to be drawn, and the roll bearings are cleaned, cooled, and lubricated.
Claim 5
Dependent Claim
33 words
A device accOrding to claim 2, the diameter of the rolls being from 50 to 300 times the smallest uniform clearance between the periphery of the rolls and the surface of the mandrel.
Claim 6
Dependent Claim
32 words
A device according to claim 2, the diameter of the rolls being from 100 to 250 the smallest uniform clearance between the periphery of the rolls and the surface of the mandrel.
Claim 7
Dependent Claim
14 words
A device according to claim 2, each drawing-roll collar carrying at least 10 rolls.
Claim 8
Dependent Claim
15 words
A device according to claim 2, each drawing-roll collar carrying from 12 to 18 rolls.
Claim 9
Dependent Claim
28 words
A device according to claim 2, comprising at least one drawing die through which the can body is pushed at the termination of the elongation of said body.
References Cited (Backward Citations)
US1984729A
Cited
US2361318A
Cited
US2310563A
Cited
GB625011A
Cited
US3142208A
Cited
US3394568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |