Weighing scales – Computer – Electrical
Patent
1994-08-29
1998-02-17
Gellner, Michael L.
Weighing scales
Computer
Electrical
177103, G01G 1900
Patent
active
057193550
ABSTRACT:
Combinational weighing is carried out firstly by calculating combinations of weight signals from a plurality of weighing devices each weighing a batch of objects to be packaged and selecting a combination having a total weight satisfying a specified criterion with respect to a target value, and secondly by re-checking the weight signals from the weighing devices of the selected combination before discharging the objects therefrom. The value of the difference between the total weights obtained at the time of the combinational calculations and at the re-checking time is stored cumulatively after each cycle of operation, and a new target value is calculated and set after each cycle from many stored difference values from previous cycles in order to improve the work efficiency and the yield at the same time. According to a preferred embodiment, the difference between the weight values obtained at these two times of measurement is cumulatively stored after each cycle for all weighing devices and a new target value is calculated by considering the distributions of past difference values corresponding to the individual weighing devices of the selected combination.
REFERENCES:
patent: 4512427 (1985-04-01), Minamida
patent: 4529050 (1985-07-01), Mosher et al.
patent: 4570728 (1986-02-01), Toyoda
patent: 4642788 (1987-02-01), Haze
Gellner Michael L.
Gibson Randy W.
Ishida Co. Ltd.
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