Bleaching and dyeing; fluid treatment and chemical modification – Fluid treatment – Manipulation of liquid
Reexamination Certificate
2011-07-05
2011-07-05
Pyon, Harold Y (Department: 1761)
Bleaching and dyeing; fluid treatment and chemical modification
Fluid treatment
Manipulation of liquid
C008S159000, C008S137000, C008S147000
Reexamination Certificate
active
07971302
ABSTRACT:
A method of washing fabric articles in a tunnel washer includes moving the fabric articles from the intake of the washer to the discharge of the washer through first and second sectors that are a pre-wash zone. In the pre-wash zone, liquid is counter flowed in the wash interior along a flow path that is generally opposite the direction of travel of the fabric articles. The fabric articles are transferred to a main wash zone, and a washing chemical is added to the main wash zone. At about the same time, counter flow is reduced or stopped. The main wash zone can be heated as an option. After a period of time (for example, between about 20 and 120 seconds) counter flow is increased. The increased counter flow after chemical treatment amounts to either an intermediate rinse or a pre-rinse depending upon which module or zone the goods occupy. The pre-rinse ensures that the fabric articles are substantially free of soil or the majority of any soil when they are transferred to an extractor for final removal of excess water.
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Copending U.S. Appl. No. 12/400,497 to Poy et al.
Poy Russell H.
Schubert Karl
D'Souza Vanessa M.
Garvey, Jr. Charles C.
Garvey, Smith Nehrbass & North, L.L.C.
Hammer Katie
Pellerin Milnor Corporation
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