Urea cold pack having an inner bag provided with a perforated seal (US Patent 3950158)

Patent number: 3950158 Granted: 1976-04-13 Filed: 1974-05-31 Inventors: Rodger L. Gossett (Red Bud, IL, US) Assignees: American Medical Products Company (St. Louis, MO, US)

Abstract

In a thermal pack, one which may be provided with ingredients for making it either a cold pack or a hot pack, three bags are provided for the container of the pack, two of said bags being of the same size and comprising the exterior and proximate interior liners of the pack, while another bag of lesser dimensions forms