Combination weighing machine

摘要

A combination weighing machine of the type comprising a plurality of weighing units for weighing product fed thereto and providing weight signals indicative of the weights thereof, respectively, means for selecting an optimum combination of these weight signals which satisfies a predetermined condition, and means for discharging the product from those weighing units corresponding to the selected combination for deliver a batch of product satisfying the prescribed condition; in which, as the feature of invention, each weighing unit is provided with a plurality of weighing chambers and a single weigher or weight sensor for providing a weight signal indicative of the total weight of all weighing chambers and associated with loading means for selectively loading the weight chambers with product and means for detecting the weight of product in each weighing chamber and storing it, and the combination selecting means and the discharging means are arranged to select the optimum combination from all weighing chambers of all weighing units and discharge the product from those weighing chambers corresponding to the selected combination.