Method of detecting the release of dye from laundry during a was

Details Method of detecting the release of dye from laundry during a was Method of detecting the release of dye from laundry during a was

1981-06-18

1983-09-27

Coe, Philip R.

Bleaching and dyeing; fluid treatment and chemical modification

Fluid treatment

Manipulation of liquid

68 12R, 356 72, D06F 3500

Patent

active

044060289

ABSTRACT:
A method of detecting the release of dye from laundry in a washing machine despite the presence of dirt in the washing water. During a washing operation, a radiation flux including an infrared flux part (.phi..sub.I) and a visible flux part (.phi..sub.V) is passed through the wash water in which it is subject to absorption and diffusion. The flux parts .phi..sub.I and .phi..sub.V are compared during the entire washing program and the ratio of .phi..sub.V and .phi..sub.I is determined. The release of dye is signalled by a substantial variation of said ratio. The signal may be used for actuating an alarm device and/or controlling the washing program.

REFERENCES:
patent: 3114253 (1963-12-01), Morey et al.
patent: 3613405 (1971-10-01), Shimokusu et al.
patent: 4237565 (1980-12-01), Torita et al.

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