US4286859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air pollution attenuation system for copiers employing noxious gas in a developing chamber through which the copy passes for development
Assignee: CARTRI-JET Inc
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Filing: 1979-04-09
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Granted: 1981-09-01
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Expires: 1999-04-09
Abstract
Abstract An air pollution attenuation system for copiers employing ammonia gas having a vacuum manifold spanning the copy as it emerges from the developing chamber and connected to a stripping bath preferably reactive with the ammonia as for instance aqueous citric acid where a substantial portion of the residual ammonia is removed, the system also including means for returning and distributing the effluent gas from the bath over the copy downstream from the vacuum manifold.
Inventors
- 👤 Clarence Kurek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:19
CPC Classifications
G; G03; G03D; G03D7/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
175 words
An air pollution attenuation system for copiers employing a noxious gas in a developing chamber through which a sheet for development passes comprising (a) a developing chamber having an inlet to receive a sheet and an outlet to discharge the sheet; (b) a vacuum generating manifold external to the developing chamber, lying proximal to the surface of the sheet and positioned proximal to the outlet of the developing chamber extending generally transversely across said sheet and to its direction of movement for drawing residual noxious gas from the surface of said sheet and entraining the said gas in a contained stream; (c) means for passing the contained, noxious gas bearing stream through stripping means for removing substantial amounts of said noxious gas from said stream the stripping means emitting a gas capable of attenuating the noxious character of the noxious gas; and (d) means for passing the gas emitted from the stripping means to and discharging it in close proximity to the sheet on the opposite side of the vacuum generating manifold from said outlet.
Claim 2
Dependent Claim
175 words
An air pollution attenuation system for copiers employing a noxious gas in a developing chamber through which a sheet for development passes comprising (a) a developing chamber having an inlet to receive a sheet and an outlet to discharge the sheet; (b) a vacuum generating manifold external to the developing chamber, lying proximal to the surface of the sheet and positioned proximal to the outlet of the developing chamber extending generally transversely across said sheet and to its direction of movement for drawing residual noxious gas from the surface of said sheet and entraining the said gas in a contained stream; (c) means for passing the contained, noxious gas bearing stream through stripping means for removing substantial amounts of said noxious gas from said stream the stripping means emitting a gas capable of attenuating the noxious character of the noxious gas; and (d) means for passing the gas emitted from the stripping means to and discharging it in close proximity to the sheet on the opposite side of the vacuum generating manifold from said outlet.
Claim 3
Dependent Claim
36 words
An air pollution attenuation system for copiers employing a noxious gas in a developing chamber through which a sheet for development passes in accordance with claim 1 in which, (a) the stripping means includes citric acid.
Claim 4
Dependent Claim
54 words
An air pollution attenuation system for copiers employing a noxious gas in a developing chamber through which a sheet for development passes in accordance with claim 1 in which, (a) the vacuum generating manifold is located adjacent to the face of the sheet most heavily exposed to the noxious gas in the developing chamber.
Claim 5
Dependent Claim
79 words
An air pollution attenuation system for copiers employing a noxious gas in a developing chamber through which a sheet for development passes in accordance with claim 1 in which, (a) the means for discharging the gas emitted from the stripping means is a manifold, external to the developing chamber lying proximal to the sheet generally parallel to the vacuum generating manifold adjacent to the face of the sheet most heavily exposed to the noxious gas in the developing chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |