A thermal bag is a type of thermally insulated shipping container in the form of a bag which can be carried, usually made of thermally insulating materials and sometimes a refrigerant gel. It is used to help maintain the temperature of its contents, keeping cold items cold, and hot items hot.
Insulated bags have been in use for many years in industry, medical/pharmaceutical use, food delivery, lunch bags, etc. Several designs have been available.[1][2][3][4]
- ^ US 6913389, Kannankeril, Charles; Arora, Atul & Wormwood, Dale, "Metallic laminated gusseted insulated bag", published 2005-07-05, assigned to Sealed Air Corp.
- ^ US 4343158, Campbell, June H., "Portable pouch for insulin", published 1982-08-10
- ^ US 6018143, Check, Robert, "Heat thermal bag", published 2000-01-25
- ^ US 5720338, Larson, Ralph I. & Phillips, Richard L., "Two-phase thermal bag component cooler", published 1998-02-24, assigned to Aavid Laboratories Inc.