Measuring and testing – Moisture content or absorption characteristic of material
Reexamination Certificate
2005-02-15
2005-02-15
Cygan, Michael (Department: 2855)
Measuring and testing
Moisture content or absorption characteristic of material
C324S693000, C324S694000
Reexamination Certificate
active
06854322
ABSTRACT:
A directional coupler sensor is provided for measuring the moisture content of a substrate, such as hair. The sensor incorporates a high frequency directional coupler having a pair of generally parallel plates defining a coupling gap therebetween. A high frequency signal generator generates an electromagnetic field across the gap with the substrate placed across the coupling gap. The coupled power relates to the moisture content of the substrate. A pressure sensor is provided to ensure that the desired compactness of the substrate across the coupling gap is achieved to obtain accurate, reliable and consistent results.
REFERENCES:
patent: 3755733 (1973-08-01), Vankoughnett et al.
patent: 4358731 (1982-11-01), Steinbrecher
patent: 4364008 (1982-12-01), Jacques
patent: 4378168 (1983-03-01), Kuisma et al.
patent: 5256978 (1993-10-01), Rose
patent: 5315258 (1994-05-01), Jakkula et al.
patent: 5767685 (1998-06-01), Walker
patent: 6237417 (2001-05-01), Lonsdale et al.
patent: 3938391 (1990-07-01), None
patent: 57-163860 (1982-10-01), None
patent: 1453275 (1989-01-01), None
patent: WO-9821818 (1998-05-01), None
Abrosimova, E.B., et al., “Amplitude UHF Humidity Meter For Solid And Powdered Materials,”Measurement Techniques, vol. 39, No. 11, Nov. 1, 1996, pp. 1162-1165.
Nagata, H., “Hair Moisture Meter HC-1000,”Sharp Technical Journal, 1985, Japan, No. 33, pp. 151-152.
Kupfer, K., et al., “Materialfeuchtemessung mit Mikrowellen (Moisture measurement with microwaves)”,Technisches Messen TM, R. Oldenbourg Verlag, Munchen, Germany, vol. 59, No. 3, Mar. 1, 1992, pp. 110-115.
Gartstein Vladimir
Kerr Kendal William
McCurdy Jim Allen
Meyer Herman William
Sherman Faiz Feisal
Bolam Brian M.
Cygan Michael
Hereko Bart S.
Huston Larry L.
The procter & Gamble Company
LandOfFree
Directional coupler sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Directional coupler sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Directional coupler sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3443190