Prescour bleaching tunnel

Textiles: fluid treating apparatus – Machines – Plural fluid treating machines

Patent

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Details

68142, 68184, 68207, D06F 2302

Patent

active

054872839

ABSTRACT:
A conventional tunnel-type continuous batch washer modified for use as a commercial bleaching machine. The washer is modified by (1) lowering the rotational oscillation angle and speed of the machine's inner drum structure relative to its normal washing settings; (2) altering the water counterflow positioning and characteristics; (3) maintaining the water in the various inner drum section modules at essentially identical, relatively high levels; and (4) modifying the bath temperature characteristics of the machine. When utilized as a commercial bleaching machine the modified tunnel washer has a prescour zone disposed at its inlet end, a bleach zone downstream of the prescour zone and into which a hydrogen peroxide bleaching solution is injected, a finish zone disposed at its outlet end and into which a softening agent is injected, and a water-only rinse zone positioned between the bleach and finish zones. Each of these zones is defined by one or more inner drum structure modules which may be tandem or single batch modules. The bleaching machine is representatively used to bleach originally manufactured white textile fabric items, such as athletic socks and undergarments, prior to their packaging for sale.

REFERENCES:
patent: 3869883 (1975-03-01), Rotter
patent: 4478060 (1984-10-01), Grunewald
patent: 4546511 (1985-10-01), Kraufmann
patent: 4848107 (1989-07-01), Stoll
patent: 4856302 (1989-08-01), Eck
patent: 4984438 (1991-01-01), Batty
patent: 5307652 (1994-05-01), Nagiwara et al.
patent: 5333475 (1994-08-01), Edmundson et al.

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