US3874209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for simultaneously tapering and flanging the bodies of cylindrical metal cans
Assignee: FMI Mecfond Aziende Meccaniche Riunite SpA
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Filing: 1973-08-17
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Granted: 1975-04-01
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Expires: 1993-08-17
Abstract
Abstract A device for simultaneously obtaining the tapering and the flanging of the bodies of metal cylindrical cans, comprising in combination one pair of spindles symmetrically located on a common axis, capable of revoluting about said axis and destined to slide along said axis in order to enter into the worked body and to issue from the body itself when the operation is ended, a negatively shaped surface on the inner ends of said spindles reproducing the shape to be obtained in said cylindrical body, a pair of shaping collars idly mounted on said spindles and provided in their inner surface with the positive shape corresponding to that of the spindles, means for holding centered said collars and for allowing a progressive radial displacement thereof, so as to deform the said interposed cylindrical body, according to the aforesaid shape.
Inventors
- 👤 Giuseppe Maiorino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:43
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/2615; B21D51/2638; B21D19/00; B21D19/08; B21D19/10; B21D51/263
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
241 words
Apparatus for simultaneously tapering and flanging the bodies of cylindrical metal cans, comprising a pair of spindles, shafts mounting said spindles for rotation about and sliding movement along a common axis toward and away from each other so as jointly to support a said can when said spindles are together, each spindle having a negative surface on its inner end for shaping one end of a said can, a pair of shaping collars idly mounted on said spindles and having an inner surface having a positive shape corresponding to said negative shape but of a larger diameter than the diameter of said negative shape, each said spindle having a centering end flange for a said can, means for yieldably centering said collars and for permitting said centering means comprising conical rings idly mounted on said shafts, resilient means yieldably urging said conical rings to their center positions, discs idly mounted on said shafts but fixed against axial sliding movement on said shafts, said resilient means acting between said discs and said rings, guide pins disposed in bores in said discs and rings for permitting said rings to slide on said pins axially, a sleeve idly mounted on each said shaft, a flange extending radially outwardly from said sleeve, and a flange extending radially inwardly from each said collar and disposed between said radially outward flange and said end flange of a said spindle to guide the radial displacement of said collar.
Claim 2
Dependent Claim
241 words
Apparatus for simultaneously tapering and flanging the bodies of cylindrical metal cans, comprising a pair of spindles, shafts mounting said spindles for rotation about and sliding movement along a common axis toward and away from each other so as jointly to support a said can when said spindles are together, each spindle having a negative surface on its inner end for shaping one end of a said can, a pair of shaping collars idly mounted on said spindles and having an inner surface having a positive shape corresponding to said negative shape but of a larger diameter than the diameter of said negative shape, each said spindle having a centering end flange for a said can, means for yieldably centering said collars and for permitting said centering means comprising conical rings idly mounted on said shafts, resilient means yieldably urging said conical rings to their center positions, discs idly mounted on said shafts but fixed against axial sliding movement on said shafts, said resilient means acting between said discs and said rings, guide pins disposed in bores in said discs and rings for permitting said rings to slide on said pins axially, a sleeve idly mounted on each said shaft, a flange extending radially outwardly from said sleeve, and a flange extending radially inwardly from each said collar and disposed between said radially outward flange and said end flange of a said spindle to guide the radial displacement of said collar.
Claim 3
Dependent Claim
35 words
Apparatus as claimed in claiM 1, said means for radially displacing said collars comprising a pair of stationary cams engaging with a cylindrical peripheral surface on each said collar that rolls on a said cam.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |