In 1972, Ishida developed a multihead weigher using a computation technique capable of packaging fixed quantities of snacks and other items of irregular weights and shapes.
This revolutionary machine had a tremendous impact on the packaging industry.

This weigher was developed to process green peppers into packages of uniform weight.
Since green peppers vary in weight, we had to develop a new approach to be called the "combination weighing technique."

Here are 10 weigh hoppers. Items are placed in each hopper, and the weight signal is transmitted to the built-in computer. The computer calculates the combinations of items that come closest to the desired weight, and the combination of the items closest is ejected from the hopper. The computer continuously repeats this process.

The multihead weigher is so efficient as it can examine 1,023 possible patters more than 200 times per minute in order to select combinations of items of appropriate weights.

This processing capacity is equivalent to that of 50 to 60 workers. The industry had long sought technology capable of assembling groups of item of a specific weight.

Today, multihead weighers are widely used to weigh not only foodstuffs but also metal components, chemicals and plastic goods.