The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 1989
Filed:
Aug. 25, 1987
Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention relates to a dry cleaning method in which tanks for exclusively receiving at least two kinds of solvents which are soluble in each other are provided. One treating tank and a fractionating device for recovering the two or more kinds of solvents by fractonal distillation are provided. Exclusive filters for the respective solvents are provided through the use of, a common filter or a multi-filter device composed of both the filters which is disposed between the tanks and the treating tank. The two or more kinds of solvents are used independently so that washing is carried out. Further, the present disclosure relates to a dry cleaning method in which in a dry cleaner using organic solvents such as perchloroethylene, 1,1,1-trichloroethane, turpentine (oil series) and the like, the previously use solvent is replaced with another solvent which is soluble therein and has a lower boiling point, for exmple, Flon 113 or 11, during washing or immediately before drying in order to thereby shorten a drying period of time. According to this disclosure, the most proper washing method can be chosen for the greater part of materials, processings and forms of clothes, and troubles due to the wasing of the clothes can be reduced remarkably. Further, the disclosed apparatus and method can advantageously save occupation space, equipment cost, volume of facilities, maintenace cost and the like. In addition thereto, a drying time can be reduced by half.