US4019014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for heat welding selenium
Assignee: Xerox Corp
•
Filing: 1975-04-23
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Granted: 1977-04-19
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Expires: 1995-04-23
Abstract
Abstract A technique for the repair of selenium photoconductor elements is disclosed. The particular method includes applying a concentrated heat source to a damaged area of the photoconductor in an oscillating motion traverse to the damaged area so as to effect a weld of same. The oscillating motion of the heat source enables quick melting and resolidification of a minute area of selenium wihout undesirable recrystallization of the photoconductor.
Inventors
- 👤 John Frank Byrne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:39
CPC Classifications
B; B23; B23K; B23K5/00; B23K5/12; B23K11/00; B23K11/16; B23K11/18; Y; Y10; Y10S; Y10S264/00; Y10S264/46
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
50 words
A method for repairing damaged selenium photoconductors comprising: applying a concentrated source of heat to a minute region of the photoconductor including a damaged area of selenium, in an oscillating motion traverse to the damage for such period of time that a weld healing of the damaged photoconductor material occurs.
Claim 2
Independent Claim
50 words
A method for repairing damaged selenium photoconductors comprising: applying a concentrated source of heat to a minute region of the photoconductor including a damaged area of selenium, in an oscillating motion traverse to the damage for such period of time that a weld healing of the damaged photoconductor material occurs.
Claim 3
Dependent Claim
22 words
The method of claim 1 additionally comprising: cleaning the damaged area of the photoconductor prior to the application of a heat source.
Claim 4
Dependent Claim
24 words
The method of claim 1 additionally comprising: polishing the welded area of the selenium with an abrasive composition to smooth the previously damaged area.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein the heat source is a metallic probe element.
Claim 6
Dependent Claim
23 words
The method of claim 4 wherein the tip of the metallic probe is in the form of a loop of electrical resistance wire.
Claim 7
Dependent Claim
21 words
The method of claim 5 wherein the high electrical resistance wire is tungsten, molybdenum, or an alloy of nickel and chromium.
Claim 8
Dependent Claim
17 words
The method of claim 6 wherein the wire tipped probe is driven by an oscillatable motor element.
Claim 9
Dependent Claim
17 words
The method of claim 7 wherein the wire tipped probe is driven by an orbitally oscillatable motor.
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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) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |