US3864813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for conditioning the welding area of the cylindrical body of a packing can
Assignee: Gabriels Sprl Ets J B
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Filing: 1973-07-03
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Granted: 1975-02-11
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Expires: 1993-07-03
Abstract
Abstract A process for conditioning the weld area of a metal can, consisting in locally distorting by means of a roller pair the sheet metal in the region of the overlap of the opposite edges, so as to obtain an almost continuous cylindrical surface on the inside of the body with a groove of small width in the region of aforesaid overlapping edges. The roller pair includes an inner roller having an outer transverse contour corresponding to the inner can diameter, and the outer roller has two diameters separated by a step portion, preferably a bevel surface. The seam is passed through the rollers so that the step portion deforms the can body in the area of the inner free edge of the welded seam to reduce to a minimum the internal offset area along opposite sides of the seam in the vicinity of the inner free edge.
Inventors
- 👤 Jean Morjan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:22
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/2676; B23; B23P; B23P15/00; B23P15/22; Y; Y10; Y10S; Y10S220/00; Y10S220/01
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
199 words
A process for conditioning the welded lapped seam area of the body of a cylindrical packing can comprising: a. lap seam welding the ends of the body of a cylindrical packing can to produce a joint having an inner free edge; b. passing said welded lapped seam area along the weld direction through a roller pair comprising a first inner roller having an outer transverse contour corresponding to thE internal diameter of said can body and a second outer roller having two sections of different diameters separated by an offset step portion of a height substantially equal to the thickness of said can body, said rollers being separated by a distance substantially equal to the thickness of the can body in the area between the larger diameter section of the second roller and said first roller, and a distance substantially equal to the lapped seam thickness in the area between the smaller diameter section of said second roller and said first roller, said lapped seam area passing through said roller pairs so that said offset step portion of said second outer roller is positioned closely opposite said inner free edge of the welded lapped seam during the conditioning process.
Claim 2
Dependent Claim
199 words
A process for conditioning the welded lapped seam area of the body of a cylindrical packing can comprising: a. lap seam welding the ends of the body of a cylindrical packing can to produce a joint having an inner free edge; b. passing said welded lapped seam area along the weld direction through a roller pair comprising a first inner roller having an outer transverse contour corresponding to thE internal diameter of said can body and a second outer roller having two sections of different diameters separated by an offset step portion of a height substantially equal to the thickness of said can body, said rollers being separated by a distance substantially equal to the thickness of the can body in the area between the larger diameter section of the second roller and said first roller, and a distance substantially equal to the lapped seam thickness in the area between the smaller diameter section of said second roller and said first roller, said lapped seam area passing through said roller pairs so that said offset step portion of said second outer roller is positioned closely opposite said inner free edge of the welded lapped seam during the conditioning process.
Claim 3
Dependent Claim
53 words
The process recited in claim 1, further wherein said offset step portion is a bevel surface, with said lapped seam area passing through said roller pair so that the intersection of said smaller diameter section of said second roller and said bevel surface lies opposite said inner free edge during the conditioning process.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |