Method of and apparatus for drying articles in contact with an o

Details Method of and apparatus for drying articles in contact with an o Method of and apparatus for drying articles in contact with an o

1973-08-28

1976-04-13

Burns, Wendell E.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 30, 34 48, 34 51, F26B 504

Patent

active

039494853

ABSTRACT:
The drum of a dry-cleaning apparatus is provided with a circulating heater loop including a heat-exchanger which draws gas out of the drum at one location and reintroduces it at a higher temperature at another location in the drum. A pump is operated to maintain the pressure in the drum substantially uniformly at a subatmospheric pressure so as to compensate for the vapor generated by the heating of the atmosphere in the chamber. Temperature and pressure sensors are provided in the drum to shut off the heater if the pressure and/or temperature rises above a predetermined level. In the method aspects of the invention, the articles in contact with an organic solvent are maintained in a substantially airless atmosphere of the solvent vapor, a portion of which is drawn off at a rate corresponding to the rate of vaporization while the remaining solvent vapor is recirculated after warming.

REFERENCES:
patent: 2573966 (1951-11-01), Hamlin
patent: 2574298 (1951-11-01), Smith
patent: 2929151 (1960-03-01), Hicks
patent: 3163029 (1964-12-01), Jacobs
patent: 3256613 (1966-06-01), Moulthrop
patent: R24260 (1956-12-01), Thies

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