Weighing scales – With casing closure or shield
Reexamination Certificate
2006-02-03
2009-06-09
Gibson, Randy W (Department: 2841)
Weighing scales
With casing closure or shield
Reexamination Certificate
active
07544903
ABSTRACT:
[Problems] To obtain a stable measurement result in both a measuring-out mode and normal mode, and to obtain a weight value eliminating the influence of convection in the windshield.[Means for Solving Problems] An electronic balance with a windshield51, the windshield surrounding a measuring pan53and having an openable/closable door52, for averaging measurement data in a response time and obtaining a weight value based on it, the electronic balance including: a door open/close detection sensor3for detecting an open/close of the door52; and a mode changer for switching the measurement mode between a measuring-out mode in which the response time is relatively short when the door52is open, and a normal mode in which the response time is relatively long when the door52is closed. In addition, in a convection time measurement mode, a convection time period since the door is closed with no sample on the measuring pan53until the fluctuation of the measurement data is settled down within a predetermined range is measured and memorized. After the memorized convection time has passed after a sample was put on the measuring pan53and the door52was closed in a normal measurement mode, the measurement data is averaged in a predetermined response time and the weight value is calculated.
REFERENCES:
patent: 4666005 (1987-05-01), Komoto et al.
patent: 5058692 (1991-10-01), Melcher et al.
patent: 10-19642 (1998-01-01), None
patent: 2003-156386 (2003-05-01), None
International Search Report of PCT/JP2006/301837, date of mailing Feb. 21, 2006.
Hamamoto Hiroshi
Shimauchi Kunio
Gibson Randy W
Shimadzu Corporation
Westerman, Hattori, Daniels & Adrian , LLP.
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