Bleaching and dyeing; fluid treatment and chemical modification – Fluid treatment – Manipulation of liquid
Reexamination Certificate
2006-06-09
2009-12-08
Stinson, Frankie L (Department: 1792)
Bleaching and dyeing; fluid treatment and chemical modification
Fluid treatment
Manipulation of liquid
C068S015000
Reexamination Certificate
active
07627920
ABSTRACT:
A method for operating a washing machine having a tub with a drum rotatably mounted in the tub and configured to hold a fabric load and a liquid recirculation system configured to recirculate liquid from the tub to the drum comprises a pre-wash step; a heating step comprising introducing steam into the tub and/or the drum; and a washing step comprising washing the fabric load with a second volume of liquid greater than the first volume of liquid. The pre-wash step can comprise recirculating a first volume of liquid between the tub and the drum without submerging a portion of the drum in the liquid and rotating the drum. In another embodiment, the pre-wash step can comprise recirculating a first volume of liquid between the tub and the drum to achieve a fabric load weight to liquid weight ratio of between about 1:0.5 and 1:2.7.
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pate
Hardaway Anthony H.
Luckman Joel A.
Vaidhyanathan Raveendran
Wong Nyik Siong
Green Clifton G.
McGarry Bair P.C.
Stinson Frankie L
Whirlpool Corporation
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