They may also need more efficient checkout counters and material-handling equipment."

Harnischfeger, based in Brookfield, Wis., also makes mining and material-handling equipment.

It includes material-handling equipment and packaging, handling and storage requirements, and pre-positioning of material and parts.

Koch was known as a manufacturer and distributor of plant operating supplies, including footwear, work and safety clothing, and material-handling equipment.

Acoustic cleaning apparatus, usually built into the material-handling equipment, works by generating powerful sound waves which shake particulates loose from surfaces, reducing the need for manual cleaning.

An acoustic cleaner consists of a sound source similar to an air horn found on trucks and trains, attached to the material-handling equipment, which directs a loud sound into the interior.