Patent US2953387A successfully refreshed from Google Patents.
US3661624A
Expired / Lapsed
US
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Method for coating tubular objects
Assignee: H C PRICE Co
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Filing: 1970-07-21
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Granted: 1972-05-09
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Expires: 1990-07-21
Abstract
Abstract A relatively high speed, continuous method and novel apparatus, especially adapted to large diameter steel pipe, for applying external thin-mill coatings, such as thermal setting epoxy and epoxy resins, wherein the pipe sections are successively advanced in a train and continuously rotated through numerous operating stations, and embodying a change-over from an external roller drive line to an internal conveyor system. The pipe overhead suspension system permits even mill coating over the complete surface of the pipe and precludes damage to the coating during curing and while it is in the critical fluid state.
Inventors
- 👤 Harry N Versoy
- 👤 Robert J Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:06
CPC Classifications
B; B23; B23K; B23K37/00; B23K37/04; B23K37/053; B05; B05C; B05C19/00; B05C19/04; Y; Y10; Y10S; Y10S118/00; Y10S118/11
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
The invention of claim 1 wherein is included the step of curing of the coating following application thereof on the pipe; and maintaining the coating on the exterior of the sections exposed and free from supporting forces against the pipe exterior during continued rotation and advancement of the respective pipe sections while curing the coating.
Claim 2
Dependent Claim
36 words
The invention of claim 2, wherein is included the step of supporting the sections externally of the sections and terminating said internal suspension thereof while continuing the rotation and advancement thereof following curing of said coating.
Claim 3
Dependent Claim
46 words
The invention of claim 3, wherein rotative forces are applied to the sections both prior to and subsequent to suspending the same; and wherein is included the step of transmitting rotative motion from the sections being rotated by said applied forces to the section under suspension.
Claim 4
Dependent Claim
122 words
In a continuous method of exteriorly coating a plurality or elongated pipe sections: supporting the sections from therebeneath while rotating the same continuously about their longitudinal axes and, at the same time, advancing the same continuously in succession along a horizontal path of travel parallel with said axes; thereupon suspending the leading ends of the sections from therewithin while continuing to rotate the same about said axes and continuing to advance the same along said path; then continuing said rotation while suspending the trailing ends of the sections from therewithin to expose the exteriors of the sections for coating; coating said exteriors of the suspended sections while continuing said rotation of the latter; and curing said coatings while the sections are suspended.
References Cited (Backward Citations)
US1141320A
Cited
US3389009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |