Yamato Scale Company, Limited

Takeyoshi Nagao

Toru Kohashi

Shozo Kawanishi

Takaaki Kawashima

Mitsunobu Haraguchi

A combination weigher comprises a collecting conveyor which conveys objects and discharges the objects; a plurality of weighing conveyors configured to convey the objects fed thereto and discharge the objects, to feed the objects to the collecting conveyor apparatus; a plurality of weight sensors for measuring weights of the objects held on the weighing conveyors; and a control section which finds a discharge combination including a combination of the weighing conveyors holding the objects in which a total weight thereof falls within a target weight range, based on the measured weight values of the weight sensors and activates the weighing conveyors selected to make up the discharge combination to convey the objects on the weighing conveyors and discharge the objects, wherein a conveying speed of the collecting conveyor apparatus is set higher than a conveying speed of the weighing conveyors.

Combination weigher

A kind of automatic rotary weighing and packing machine having a plurality of weighers radially or annularly arranged on a circular rotary table for automatically effecting such processes as filling of product, weighing and judgement at respective positions around the table, which is especially suitable in the case where the product to be packed is sticky granular or powdered bulk material and the packing container is a bag or the like. This machine uses no weigh hopper or bucket in which sticky product is liable to remain to cause weight error, and the packing container is held by a holding mechanism attached to each weigher and directly filled with product, which is then weighed and sealed. A fixed amount feeding device is used for feeding product into the container and its throughput is controlled based upon the result of a subsequent weighment for keeping the weight of product packed in each container always at a predetermined value.

Device for automatically filling and packing predetermined weight of

An improved apparatus and method for controlling the rate of feeding product to a weigh hopper or cradle by changing the exit aperture of a feeding device in accordance with a characterized condition so that a predetermined amount or weight of product is fed to the weigh hopper or cradle at high accuracy and within a minimum time. The method is especially useful when used in a combination weighing machine.

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Hyogo, Japan

Takeyoshi Nagao