Patent EP0797988A2 successfully refreshed from Google Patents.
US3790801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for ultraviolet light treatment in a controlled atmosphere
Assignee: RPC Industries
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Filing: 1972-09-08
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Granted: 1974-02-05
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Expires: 1992-09-08
Abstract
Abstract Apparatus which permits treatment of products with ultraviolet light in a controlled atmosphere comprises an inner chamber positioned within an outer chamber, the workpiece to be treated passing through the inner chamber. The outer chamber has a means for supplying ultraviolet light in the upper surface of a second or inner chamber whereby ultraviolet light may be radiated in the inner or second chamber. The apparatus may also contain means for carrying the product to be treated, as well as cooling means at either end of the path of treatment.
Inventors
- 👤 G Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:48
CPC Classifications
G; G21; G21K; G21K5/00; A; A61; A61L; A61L2/00; A61L2/02; A61L2/08; A61L2/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
109 words
In an apparatus for treating products with ultraviolet light in a controlled atmosphere A. a first chamber having at least one ultraviolet lamp in a surface thereof, B. a second chamber positioned within said first chamber and defining a reservoir between said chambers, C. said second chamber having spaced inlet and outlet openings for a workpiece establishing a path of travel for said workpiece and having means for the passage of ultraviolet light in juxtaposition with said ultraviolet lamp, D. said first and second chambers substantially completely enclosing said path of travel between said inlet and outlet openings, and E. means for intRoducing gas into said path of travel.
Claim 2
Dependent Claim
109 words
In an apparatus for treating products with ultraviolet light in a controlled atmosphere A. a first chamber having at least one ultraviolet lamp in a surface thereof, B. a second chamber positioned within said first chamber and defining a reservoir between said chambers, C. said second chamber having spaced inlet and outlet openings for a workpiece establishing a path of travel for said workpiece and having means for the passage of ultraviolet light in juxtaposition with said ultraviolet lamp, D. said first and second chambers substantially completely enclosing said path of travel between said inlet and outlet openings, and E. means for intRoducing gas into said path of travel.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 in which said second chamber extends through said first chamber.
Claim 4
Dependent Claim
20 words
The apparatus of claim 1 in which said means for introducing gas comprises means for introducing gas into said reservoir.
Claim 5
Dependent Claim
28 words
The apparatus of claim 1 in which said means for the passage of ultraviolet light in said second chamber is a window in one surface of said chamber.
Claim 6
Dependent Claim
41 words
The apparatus of claim 1 in which said means for the passage of ultraviolet light in said second chamber is the extension of the lamps so that the bulbs of the lamps form part of a surface of said second chamber.
Claim 7
Dependent Claim
21 words
The apparatus of claim 1 in which cooling means is provided in a portion of the surface of said second chamber.
Claim 8
Dependent Claim
19 words
The apparatus of claim 1 in which said means for introducing gas comprises a plurality of gas distribution tubes.
Claim 9
Dependent Claim
27 words
The apparatus of claim 1 in which additional means for the introduction of gas are provided at the said inlet and outlet openings in said second chamber.
Claim 10
Dependent Claim
27 words
The apparatus of claim 1 in which means for conveying the workpiece along said path of travel is provided in the lower surface of said second chamber.
Claim 11
Dependent Claim
15 words
The apparatus of claim 9 in which said means for conveying the workpiece comprises rollers.
Claim 12
Dependent Claim
28 words
The apparatus of claim 1 in which said means for the passage of ultraviolet light in said second chamber is an opening in the surface of said chamber.
References Cited (Backward Citations)
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US2575426A
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US2845541A
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US2876187A
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US2887584A
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US3224266A
Cited
US3676673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |