US4082869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-hot metallic extrusion-coating method
Assignee: Individual
•
Filing: 1976-07-08
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Granted: 1978-04-04
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Expires: 1996-07-08
Abstract
Abstract A method and apparatus for use in continuously applying molten coating metal, such as in galvanizing or aluminizing to tubes, rods, wire or other work pieces passing through a metallic bath. The molten metal in a reservoir is discharged onto the tube or rod, the metal flowing around the tube or rod being controlled by a splash tube. The coating metal is progressively agitated and cooled within the splash tube, after which the tubing or rod is accurately centered to exit the splash tube with an even coating of the desired thickness, such coating being in a stable condition. The entire system is enclosed in an inert atmosphere eliminating the formation of "galvanizers' dross", oxides of aluminum, etc.
Inventors
- 👤 Anthony J. Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:09
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/14; C23C2/16; C23C2/18; C23C2/185; C23C2/003; C23C2/0038; C23C2/02; C23C2/022; C23C2/34; C23C2/36; C23C2/38
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
134 words
A method of providing a uniform metallic coating on a moving work piece, comprising the steps of: moving a said workpiece in a fixed path, including passage through a splash tube; surrounding the work piece with molten metal during said movement; containing the molten metal in close proximity to the work piece throughout its coating movement within the splash tube; agitating progressively the contained molten metal with a series of spiral ribs positioned toward the exit end of the splash tube; cooling the molten metal to approach a plastic state as it moves in the direction of work piece movement past the splash tube; and uniformily confining the thickness of the molten metal in its plastic state around the work piece as it cools to extrude a sized, stable coating on the work piece.
Claim 2
Independent Claim
134 words
A method of providing a uniform metallic coating on a moving work piece, comprising the steps of: moving a said workpiece in a fixed path, including passage through a splash tube; surrounding the work piece with molten metal during said movement; containing the molten metal in close proximity to the work piece throughout its coating movement within the splash tube; agitating progressively the contained molten metal with a series of spiral ribs positioned toward the exit end of the splash tube; cooling the molten metal to approach a plastic state as it moves in the direction of work piece movement past the splash tube; and uniformily confining the thickness of the molten metal in its plastic state around the work piece as it cools to extrude a sized, stable coating on the work piece.
Claim 3
Dependent Claim
25 words
The method of claim 1, including providing an inert atmosphere in which the method is carried out so as to prevent the formation of oxides.
Claim 4
Dependent Claim
25 words
The method of claim 3, wherein the plastic state of the cooled metal effects damming of the molten coating metal upon stoppage of work movement.
Claim 5
Dependent Claim
24 words
The method of claim 1, including aligning the work piece to insure an evenly distributed coating about the outer periphery of the work piece.
Claim 6
Dependent Claim
28 words
The method of claim 1, including gradually constricting the thickness of the molten metal surrounding the work piece during said confining in the direction of work piece movement.
Claim 7
Dependent Claim
22 words
The method of claim 1, including smoothing the metallic coating on the work piece after the molten metal reaches its plastic state.
Claim 8
Dependent Claim
24 words
The method of claim 1, including surrounding and insulating the coated work piece and cooling and heating the metallic coating for controlling its temperature.
Claim 9
Dependent Claim
23 words
The method of claim 1 including gradually constricting and smoothing the metallic coating as it deposits on the work piece during said confining.
Claim 10
Independent Claim
154 words
A method of providing a uniform metallic coating on a number of separate work pieces comprising the steps of: heating the metal to provide a source of molten metal; simultaneously moving the work pieces in separate paths including passage through a respective separate splash tube; surrounding each work piece with molten metal from said source during said movement thereof; containing the molten metal in close proximity to the work pieces throughout its coating movement within the respective splash tubes; agitating pregressively the contained molten metal with a series of spiral ribs positioned toward the exit end of the splash tubes; cooling the molten metal on the work pieces to approach a plastic state during movement of said workpieces past the splash tubes; and uniformly extruding and confining the cooled metal on the work pieces during said movement past the splash tubes to simultaneously produce a number of separate work pieces with uniform stable coatings.
Claim 11
Independent Claim
154 words
A method of providing a uniform metallic coating on a number of separate work pieces comprising the steps of: heating the metal to provide a source of molten metal; simultaneously moving the work pieces in separate paths including passage through a respective separate splash tube; surrounding each work piece with molten metal from said source during said movement thereof; containing the molten metal in close proximity to the work pieces throughout its coating movement within the respective splash tubes; agitating pregressively the contained molten metal with a series of spiral ribs positioned toward the exit end of the splash tubes; cooling the molten metal on the work pieces to approach a plastic state during movement of said workpieces past the splash tubes; and uniformly extruding and confining the cooled metal on the work pieces during said movement past the splash tubes to simultaneously produce a number of separate work pieces with uniform stable coatings.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |