Unit for detecting an addition of a cleaning agent in a...

Details Unit for detecting an addition of a cleaning agent in a... Unit for detecting an addition of a cleaning agent in a...

2006-03-28

2006-03-28

Barr, Michael (Department: 1746)

Cleaning and liquid contact with solids

Processes

Work handled in bulk or groups

C134S022100, C134S113000, C134S16600C, C134S16900A, C099S290000

Reexamination Certificate

active

07017595

ABSTRACT:
A unit for detecting an addition of a cleaning agent in a beverage dispenser, in particular in a coffee machine. In order to guarantee that a cleaning agent has been added when automatic cleaning is carried out, a measurement device is provided as well as a method of determining whether a cleaning agent has been added to the aqueous cleaning liquid. Whether a cleaning agent has been added to the aqueous cleaning liquid can be determined in dependence upon the measured conductivity and the measured electrical resistance of the cleaning liquid, respectively.

REFERENCES:
patent: 3338153 (1967-08-01), Holstein et al.
patent: 4848381 (1989-07-01), Livingston et al.
patent: 4956887 (1990-09-01), Hakulinen
patent: 5297596 (1994-03-01), Anson
patent: 5370743 (1994-12-01), Usui et al.
patent: 5551988 (1996-09-01), Reyhanloo et al.
patent: 6786356 (2004-09-01), Geiger et al.

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