US4353323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the treating of articles
Assignee: Duerr GmbH
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Filing: 1981-04-22
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Granted: 1982-10-12
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Expires: 2001-04-22
Abstract
Abstract An apparatus for treating articles with a solvent, a solvent-containing liquid such as a lacquer, or with solvent vapors, comprises an open treating vessel provided with a device for raising and lowering the articles in the vessel and a heating unit at the bottom of the vessel for heating solvent therein. Around the wall of the vessel, above the bottom thereof, cooling tubes are provided which are connected to the cold branch of a heat pump so as to condense solvent vapors which can collect in a trough below these tubes and can be returned to a compartment of the vessel adjacent the treating compartment. The hot branch of the heat pump is connected via a heat exchanger to a water boiler and heat storage tank and the heater is connected to this boiler by a pump controlled by a control device responsive to the raising and lowering of the articles.
Inventors
- 👤 Heinz Koblenzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:49
CPC Classifications
B; B05; B05C; B05C3/00; B05C3/02; B05C3/09; C; C23; C23G; C23G5/00; C23G5/02; C23G5/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
210 words
An apparatus for treating articles with a solvent comprising: an upwardly open vessel having a bottom and adapted to receive liquid solvent therein; a heater at said bottom for heating solvent in said vessel to vaporize same, said vessel having an upper wall portion above said solvent; a condenser formed along said upper wall portion for condensing vapor of said solvent; a heat pump having a circulating heat carrier and formed with a hot branch including a heat exchanger and a cold branch, said cold branch being connected to said condenser; a water-containing heat storage tank and boiler adapted to be heated by said hot branch; means for circulating a fluid for heating water for said tank through said heat exchanger; means for feeding water from said tank to said heater; means for lowering articles into said vessel and raising articles in said vessel for treatment of said articles with said solvent in said vessel; and control means connected to said feeding means for controlling same in response to the raising and lowering of articles in said vessel and including means, effective upon raising of said articles in said vessel to operate said feeding means in an idling mode enabling convective movement of water through said heater from said tank.
Claim 2
Independent Claim
210 words
An apparatus for treating articles with a solvent comprising: an upwardly open vessel having a bottom and adapted to receive liquid solvent therein; a heater at said bottom for heating solvent in said vessel to vaporize same, said vessel having an upper wall portion above said solvent; a condenser formed along said upper wall portion for condensing vapor of said solvent; a heat pump having a circulating heat carrier and formed with a hot branch including a heat exchanger and a cold branch, said cold branch being connected to said condenser; a water-containing heat storage tank and boiler adapted to be heated by said hot branch; means for circulating a fluid for heating water for said tank through said heat exchanger; means for feeding water from said tank to said heater; means for lowering articles into said vessel and raising articles in said vessel for treatment of said articles with said solvent in said vessel; and control means connected to said feeding means for controlling same in response to the raising and lowering of articles in said vessel and including means, effective upon raising of said articles in said vessel to operate said feeding means in an idling mode enabling convective movement of water through said heater from said tank.
Claim 3
Dependent Claim
22 words
The apparatus defined in claim 1 wherein said feeding means includes a rotary impeller pump connected between said tank and said heater.
Claim 4
Dependent Claim
14 words
The apparatus defined in claim 2 wherein said tank is a utility water tank.
Claim 5
Dependent Claim
19 words
The apparatus defined in claim 3 wherein said hot branch further comprises an air cooler provided with a fan.
Claim 6
Dependent Claim
44 words
The apparatus defined in claim 4, further comprising a trough disposed below said condenser for collecting condensate therefrom, said vessel having a partition subdividing same into a treatment chamber and a collection chamber to condensate from said trough being delivered to said collection chamber.
Claim 7
Dependent Claim
31 words
The apparatus defined in claim 5 wherein said articles are received in a basket and the means for raising and lowering said articles includes fluid operated cylinders engageable with said basket.
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) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |