Patent US4048912A successfully refreshed from Google Patents.
US4048912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color spray booth and method of ventilating the same
Assignee: Svenska Flaktfabriken AB
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Filing: 1975-09-19
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Granted: 1977-09-20
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Expires: 1995-09-19
Abstract
Abstract A ventilated enclosure, for example a paint-spraying booth, is divided into two or more zones by one or more isolating curtains of rapidly-flowing air. One longitudinal curtain is used on each side of the object to be treated in the enclosure, to provide a central longitudinal zone for the surface treatment process and two side zones for the workmen. The two curtains converge downwardly toward each other so that the ventilating air flowing downwardly between the curtains exits from the central zone largely by way of the space between said objects. Transverse curtains and/or additional longitudinal curtains may also be used with special advantages, particularly when the speeds and positions of the curtains are specially selected.
Inventors
- 👤 George Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:02
CPC Classifications
B; B05; B05B; B05B16/00; B05B16/90; B05B16/95; B05B12/00; B05B12/16; B05B12/18; B05B16/60; B05B13/00; B05B13/02; B05B13/04; B05B13/0447; B05B13/0452; Y; Y10; Y10S; Y10S118/00; Y10S118/07; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
In a process for ventilating a station for the surface treatment of spaced-apart successive objects arriving sequentially at said station, by passing inlet ventilating air downward through said station and about said objects from inlets in a ceiling above said station, removing said ventilating air by way of outlets in a floor below the level of the objects, and dividing the interior of said station into a first zone adjacent each said successive object and at least a pair of other zones more remote from said each object by means of a pair of curtains of air moving at a velocity higher than that of said ventilating air and disposed generally adjacent opposite sides of said object, the improvement wherein said curtains are directed convergently downward so that said flow of said ventilating air in said first zone converges downwardly, whereby the outflow of said ventilating air from said one zone is principally by way of the spacing between said objects and at relatively high velocity.
Claim 2
Dependent Claim
166 words
In a process for ventilating a station for the surface treatment of spaced-apart successive objects arriving sequentially at said station, by passing inlet ventilating air downward through said station and about said objects from inlets in a ceiling above said station, removing said ventilating air by way of outlets in a floor below the level of the objects, and dividing the interior of said station into a first zone adjacent each said successive object and at least a pair of other zones more remote from said each object by means of a pair of curtains of air moving at a velocity higher than that of said ventilating air and disposed generally adjacent opposite sides of said object, the improvement wherein said curtains are directed convergently downward so that said flow of said ventilating air in said first zone converges downwardly, whereby the outflow of said ventilating air from said one zone is principally by way of the spacing between said objects and at relatively high velocity.
Claim 3
Dependent Claim
33 words
The method of claim 1, wherein the velocity of said ventilating air into said first zone, and the consequent air pressure in said first zone, is greater than that in said other zones.
Claim 4
Dependent Claim
22 words
The method of claim 2, wherein the velocity of said ventilating air entering said first zone is about 0.5 meters per second.
Claim 5
Dependent Claim
24 words
The method of claim 2, wherein the velocity of said ventilating air entering said other zones is about 0.15 to 0.2 meters per second.
Claim 6
Dependent Claim
31 words
The method of claim 1, in which said curtains of air are spaced laterally from said each object, so as to provide a region of low air speed around each object.
Claim 7
Dependent Claim
16 words
The method of claim 1, wherein said curtains extend transversely between successive ones of said objects.
Claim 8
Dependent Claim
21 words
The method of claim 6, comprising moving said transversely extending curtains and said objects at the same speed through said station.
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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |