Thermoforming equipment maker Brown Machine LLC has earned a U.S. patent for a bayonet-style device that allows the quick changing of plug assists without the need for hand tools.
The plug assists can be installed or removed individually with a simple hand twist. When twisted to the locked position, the plug assist is held firmly so it cannot accidentally rotate to an unlocked position, according to the company.
Brown of Beaverton, Mich., said the bayonet concept can be incorporated into newly designed third-platen and conventional thermoforming tools. It also can be retrofitted to many existing tools.
Brown said the quick-change feature is running on several multicavity production tools that thermoform a range of small and large, round and rectangular single-service containers.
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