Heat sealer used to prepare plastic bag of lettuce for shelf life testing. A heat sealer is a machine used to seal products, packaging, and other thermoplastic materials using heat. This can be with uniform thermoplastic monolayers or with materials having several layers, at least one being thermoplastic.
KDNK (88.1 FM) is a community access station broadcasting an eclectic format of music and local news in western Colorado in the United States.
Many books will tell you that it was KDKA radio in Pittsburgh, but that is not accurate. While KDKA dâ¦id in fact receive a license in late October of 1920, there were already other stations on the air, most notably 8MK (today known as WWJ) in Detroit, which had been on the air since late August 1920.