US4481401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for welding coated plates
Assignee: PREFERRED TECHNICAL GROUP Inc
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Filing: 1982-01-27
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Granted: 1984-11-06
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Expires: 2002-01-27
Abstract
Abstract Interposing a coating-compatible strip material between a coated plate to be welded and a welding electrode that contacts that plate during the welding operation so that a coating-compatible film is applied to the plate during the welding process to prevent the removal of the protective coating of the plate. A device for performing the process includes support means for supporting a supply of strip material and guides for interposing the strip material between the plate and the welding electrode that contacts that plate during the welding operation. The strip material may be contained in a cassette which is adapted to be attached to the device.
Inventors
- 👤 Bernard Humblot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:31
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/16; B23K11/163
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
125 words
A process for welding coated plates wherein at least one welding electrode is applied on a said plate to be welded, comprising: (a) interposing a strip material between said electrodes and a coated surface of said plate to be welded, said strip material comprising an alloy of copper and a metal capable of being alloyed with said coating of said plate to be welded; and (b) welding said plate such that during welding, a portion of said strip material which is in contact with said electrode and said plate to be welded is alloyed with said coating, so that a part of said strip material is detached to form a coating to replace a part of said coating removed by said welding of said plate.
Claim 2
Dependent Claim
125 words
A process for welding coated plates wherein at least one welding electrode is applied on a said plate to be welded, comprising: (a) interposing a strip material between said electrodes and a coated surface of said plate to be welded, said strip material comprising an alloy of copper and a metal capable of being alloyed with said coating of said plate to be welded; and (b) welding said plate such that during welding, a portion of said strip material which is in contact with said electrode and said plate to be welded is alloyed with said coating, so that a part of said strip material is detached to form a coating to replace a part of said coating removed by said welding of said plate.
Claim 3
Dependent Claim
21 words
The process as recited in claim 1, wherein said coating is selected from the group consisting of galvanized coatings and zinc.
Claim 4
Dependent Claim
18 words
The process as recited in claim 1, wherein said strip material comprises an alloy containing copper and zinc.
Claim 5
Dependent Claim
21 words
The process as recited in claim 1, wherein said strip material comprises an alloy containing between about 60% to 65% copper.
Claim 6
Dependent Claim
21 words
The process as recited in claim 1, further comprising repeating said welding and interposing fresh strip material immediately after each weld.
Claim 7
Dependent Claim
64 words
The process as recited in claim 1, further comprising the steps of: (a) supporting a supply of said strip material prior to said step of interposing said strip material; (b) guiding said strip material between said at least one welding electrode and the corresponding surface of the plate contacted thereby; (c) effecting the weld; and (d) incrementally advancing said strip material after said welding.
Claim 8
Dependent Claim
36 words
The process as recited in claim 6, further comprising the steps of: (a) sensing the amount of said strip material in supply; and (b) signalling when the supply of said strip material reaches a predetermined quantity.
Claim 9
Dependent Claim
24 words
The process as recited in claim 7, and wherein said strip material is incrementally advanced by a constant length after each weld is effected.
Claim 10
Dependent Claim
14 words
The process as recited in claim 1 wherein said plates are made of steel.
Claim 11
Dependent Claim
39 words
The process as recited in claim 6 wherein said strip material is incrementally advanced by incrementally driving a driveshaft or supporting a take-up reel for receiving a portion of said strip material that remains after each weld is effected.
Claim 12
Dependent Claim
87 words
The process as recited in claim 7 wherein the amount of said strip material in supply is sensed by sensing the position of a sliding assembly carrying a contacting member for contacting the outer peripheral surface of said strip material on a supply roll, said sliding assembly being slidable diametrically with respect to the axis of rotation of said supply roll, and wherein said sliding assembly is biased toward said supply roll such that said contacting member is biased against said strip material on said supply roll.
Claim 13
Dependent Claim
27 words
The process as recited in claim 11 further comprising decreasing the angular displacement of said driveshaft in proportion to the amount of said strip material in supply.
Claim 14
Dependent Claim
71 words
The process as recited in claim 12 wherein the angular displacement of said driveshaft is decreased by limiting its displacement with a movable stop associated with said sliding assembly, said stop limiting the return of a lever independently rotatable about said driveshaft in proportion to the thickness of said strip material on said supply roll so that said strip material is incrementally advanced a constant length after each weld is effected.
Claim 15
Dependent Claim
22 words
The process as recited in claim 13 further comprising preventing welding when the supply of said strip material reaches a predetermined quantity.
References Cited (Backward Citations)
JPS5372751A
Cited
US4204180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |