US3574953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying and curing ovens
Assignee: Ayrodev Processes Ltd
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Filing: 1969-02-20
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Granted: 1971-04-13
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Expires: 1989-02-20
Abstract
Abstract In a drying and curing oven heated air is introduced through the lower open end of a drying compartment and rises and makes intimate contact with an article supported in said compartment, and used air is exhausted through one or more ducts extending from a closed top of the compartment. If desired, the exhausted used air is discharged to a burner for heating incoming drying air and is recirculated with the latter to said drying compartment.
Inventors
- 👤 Dennis George Furnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:23
CPC Classifications
F; F26; F26B; F26B23/00; F26B23/02; F26B23/022
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
198 words
A drying or curing oven for varnish or lacquer coated articles comprising, in combination: a. a compartment having 1. double upright walls, the inner one of said walls bounding an oven chamber downwardly open to atmosphere surrounding the oven, the outer and inner walls defining therebetween first duct means for supplying a gas to said chamber, said duct means having orifice means extending about the downwardly directed open side of said cHamber for discharging the supplied gas, and 2. to top wall upwardly bounding said chamber; b. second duct means extending from said top wall and communicating with said chamber for exhausting gas from the same; c. deflecting means along said inner wall adjacent said orifice for deflecting said supplied gas and for thereby minimizing turbulence at said open side; d. damper means in one of said duct means for controlling the flow of gas through said chamber between said first and second duct means and for thereby achieving a state of balance in the gas at said open side; e. heating means for heating the gas supplied by said first duct means; and f. recirculating means for returning a portion of the exhausted gas to said chamber.
Claim 2
Dependent Claim
198 words
A drying or curing oven for varnish or lacquer coated articles comprising, in combination: a. a compartment having 1. double upright walls, the inner one of said walls bounding an oven chamber downwardly open to atmosphere surrounding the oven, the outer and inner walls defining therebetween first duct means for supplying a gas to said chamber, said duct means having orifice means extending about the downwardly directed open side of said cHamber for discharging the supplied gas, and 2. to top wall upwardly bounding said chamber; b. second duct means extending from said top wall and communicating with said chamber for exhausting gas from the same; c. deflecting means along said inner wall adjacent said orifice for deflecting said supplied gas and for thereby minimizing turbulence at said open side; d. damper means in one of said duct means for controlling the flow of gas through said chamber between said first and second duct means and for thereby achieving a state of balance in the gas at said open side; e. heating means for heating the gas supplied by said first duct means; and f. recirculating means for returning a portion of the exhausted gas to said chamber.
Claim 3
Dependent Claim
119 words
to top wall upwardly bounding said chamber; b. second duct means extending from said top wall and communicating with said chamber for exhausting gas from the same; c. deflecting means along said inner wall adjacent said orifice for deflecting said supplied gas and for thereby minimizing turbulence at said open side; d. damper means in one of said duct means for controlling the flow of gas through said chamber between said first and second duct means and for thereby achieving a state of balance in the gas at said open side; e. heating means for heating the gas supplied by said first duct means; and f. recirculating means for returning a portion of the exhausted gas to said chamber.
Claim 4
Dependent Claim
119 words
to top wall upwardly bounding said chamber; b. second duct means extending from said top wall and communicating with said chamber for exhausting gas from the same; c. deflecting means along said inner wall adjacent said orifice for deflecting said supplied gas and for thereby minimizing turbulence at said open side; d. damper means in one of said duct means for controlling the flow of gas through said chamber between said first and second duct means and for thereby achieving a state of balance in the gas at said open side; e. heating means for heating the gas supplied by said first duct means; and f. recirculating means for returning a portion of the exhausted gas to said chamber.
Claim 5
Dependent Claim
24 words
An oven as set forth in claim 1, further comprising raising means for raising said coated objects into said chamber through said open side.
Claim 6
Dependent Claim
18 words
An oven as set forth in claim 2, wherein said orifice is substantially annular about said open side.
References Cited (Backward Citations)
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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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |