Area rug cleaning method

Bleaching and dyeing; fluid treatment and chemical modification – Fluid treatment – Manipulation of liquid

Reexamination Certificate

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Details

C015S321000

Reexamination Certificate

active

06189170

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates to a method for commercially cleaning area rugs such as throw rungs and oriental rugs.
There are known methods, systems and apparatuses for commercially cleaning area rugs, but none that teach the effectiveness, convenience, rug protection and low cost made possible by this invention.
An example of a different method and an apparatus is described in U.S. Pat. No. 4,453,386, issued to Wilkins on Jun. 12, 1984. With the Wilkins system, rugs are positioned upside down on a conveyor belt and sprayed angularly upward into carpet fiber and downward onto carpet backing with cleaning fluid from a plurality of diversely directed nozzles for dirt removal, rinsing and drying while the rugs are being conveyed across a top of a plurality of successively washing and drying portions of a rectangular tank. Wilkins taught a general-purpose rug-washing system that does not allow sufficient flexibility of professional cleaning techniques required for different types of rugs. Nor does it provide sufficient dry particle removal, washing action, deodorizing, dry cleaning and fabric conditioning for most types of rugs. It has limited effectiveness for some types of rugs and is damaging to others.
SUMMARY OF THE INVENTION
Objects of patentable novelty and utility taught by this invention are to provide a rug-cleaning method which:
provides for application of required select professional knowledge for cleaning all types of rugs by commercial rug cleaners;
removes all types of dirt, odors and stains effectively from all portions of all types of rugs;
protects rug nap, backing and fringes; and
reconditions rug materials.
This invention accomplishes these and other objectives with a rug-cleaning method having steps of first removing dry particles with a pressurized angular blower that removes forms and concentrations of particulate which can be removed most effectively dry than wet and which would deter effective cleaning with liquid cleaning agents first. Second is immersion shampooing in a tank of shampoo solution that is agitated, strained, circulated, flushed and replaced repeatedly as appropriate to remove a major portion of dissolved and undissolved dirt that is removable without scrubbing or rubbing. Third, while the rug is still wet and soaked from the shampoo, is scrub washing rotationally while deodorizing with a detergent solution that is selected from classes and types of cleaning agents for removal of relatively adherent contaminants such as urine, food stains, rust, oils and other common dirt that may be detected in particular rugs. Fourth is water rinsing top, bottom and any fringe. Fifth is vacuuming top, bottom and any fringe with an extractor. Sixth is drying at approximately 70 to 75 degrees Fahrenheit. Seventh is spray dry cleaning with a water-miscible solvent. Eighth is conditioning with an acid-based dry-cleaning catalyst. Finally, a ninth step is rubbing with a rotating cloth pad before the dry-cleaning catalyst is fully dry.


REFERENCES:
patent: D. 384466 (1997-09-01), Taylor
patent: 3756728 (1973-09-01), Delaughter
patent: 3919729 (1975-11-01), Cannan
patent: 4168563 (1979-09-01), O' Bryan
patent: 4216563 (1980-08-01), Cyphert
patent: 4353145 (1982-10-01), Woodford
patent: 4453386 (1984-06-01), Wilkins
patent: 4552692 (1985-11-01), Gillespie
patent: 5322078 (1994-06-01), Tuttle
patent: 5349974 (1994-09-01), Mansur
patent: 5413131 (1995-05-01), Medlock
patent: 5470477 (1995-11-01), Farnsworth

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