US3834010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming welded seam can bodies
Assignee: Individual
•
Filing: 1972-09-19
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Granted: 1974-09-10
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Expires: 1992-09-19
Abstract
Abstract This disclosure relates to apparatus for forming can bodies oneat-a-time with a welded seam. The apparatus eliminates the prior need for preliminary tack welding and relies upon a simple set of guides for bringing the edges to be welded into the necessary overlapped relation then progressively decreasing the overlap while welding whereby a cylindrical can body may be welded notwithstanding the tendency of can bodies to assume a tapered configuration when welded without prior restraint.
Inventors
- 👤 R Wolfe
- 👤 R Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:02
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/06; B23K11/061; B23K11/062; B23K11/063; B23K2101/00; B23K2101/04; B23K2101/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
90 words
A method of progressively welding a short length of thin walled tubing having a leading edge, a trailing edge and side edges; said method comprising the steps of bringing the side edges of the unseamed tubing through the length of the tubing into overlapped relation with the amount of overlap increasing from the leading edge of the tubing to the trailing edge of the tubing, and feeding the so-formed unseamed tubing through welding apparatus leading edge first and progressively welding the overlapped edges while progressively decreasing the amount of overlap.
Claim 2
Independent Claim
90 words
A method of progressively welding a short length of thin walled tubing having a leading edge, a trailing edge and side edges; said method comprising the steps of bringing the side edges of the unseamed tubing through the length of the tubing into overlapped relation with the amount of overlap increasing from the leading edge of the tubing to the trailing edge of the tubing, and feeding the so-formed unseamed tubing through welding apparatus leading edge first and progressively welding the overlapped edges while progressively decreasing the amount of overlap.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein said overlapped side edges are radially spaced prior to said feeding of the unseamed tubing.
Claim 4
Dependent Claim
35 words
The method of claim 1 wherein said overlapped side edges are radially spaced prior to said feeding of the unseamed tubing with said radial spacing gradually decreasing between said trailing edge and said leading edge.
Claim 5
Dependent Claim
44 words
The method of claim 1 wherein said overlapped side edges are radially spaced prior to said feeding of the unseamed tubing with said radial spacing gradually decreasing between said trailing edge and said leading edge and coming into contact generally at the welding apparatus.
Claim 6
Dependent Claim
23 words
The method of claim 2 wherein the welding is of the electrical heating type and welding occurs between a pair of opposed rolls.
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein the welding is of the electrical resistance heating type utilizing roller electrodes.
Claim 8
Independent Claim
84 words
A method of forming a short length of thin wall tubing comprising the steps of providing a blank, forming the blank generally into an open seam cylinder having a leading edge and a trailing edge and with free opposing edges in circumferentially spaced relation, progressively reducing the diameter of the cylinder while guiding said free edges into overlapped relation, then progressively diminishing the overlap to a predetermined lap starting at the leading edge of the cylinder, and thereafter progressively welding together the lapped edges.
Claim 9
Independent Claim
84 words
A method of forming a short length of thin wall tubing comprising the steps of providing a blank, forming the blank generally into an open seam cylinder having a leading edge and a trailing edge and with free opposing edges in circumferentially spaced relation, progressively reducing the diameter of the cylinder while guiding said free edges into overlapped relation, then progressively diminishing the overlap to a predetermined lap starting at the leading edge of the cylinder, and thereafter progressively welding together the lapped edges.
Claim 10
Dependent Claim
13 words
The method of claim 7 wherein the cylinder is externally and internally guided.
Claim 11
Dependent Claim
28 words
The method of claim 7 wherein the cylinder is externally guided in changing the section thereof and the free edges are guided to maintain orientation of the cylinder.
Claim 12
Dependent Claim
18 words
The method of claim 9 wherein the welding is of the electrical resistance heating type utilizing roller electrodes.
Claim 13
Dependent Claim
50 words
The method of claim 1 wherein said unseamed tubing with the side edges thereof in overlapping relation is shaped to an oval cross section and then brought to a circular cross section when the overlapping of the overlapped side edges is reduced and the overlapped side edges are welded together.
Claim 14
Dependent Claim
58 words
The method of claim 1 wherein said unseamed tubing with the side edges thereof in overlapping Relation is shaped to an oval cross section having a major axis passing said overlapped edges and then brought to a circular cross section when the overlapping of the overlapped side edges is reduced and the overlapped side edges are welded together.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |