초록 ▼

A heat retaining container for maintaining heated food warm for a considerable period of time and method of making same that includes an outer cover formed of a rectangular blank of sheet material having reversely folded marginal portions to define opposed end pockets, and an insulating liner formed

A heat retaining container for maintaining heated food warm for a considerable period of time and method of making same that includes an outer cover formed of a rectangular blank of sheet material having reversely folded marginal portions to define opposed end pockets, and an insulating liner formed by opposed sheets of heat reflecting material having sandwiched therebetween a layer of gas impervious cells or bubbles filled with a gaseous medium, e.g. air. The opposed ends of the liner are inserted into the opposed end pockets of the cover blank whereby the cover blank and liner are reversely folded to define overlying panel portions, one of said panel portions being slightly greater to define a flap for sealing the open end. The opposed side edges of the reversely folded blank are suitably secured together in the assembled position of the container, and a fastener is provided for securing the flap in the closed position.

대표청구항 ▼

[What is claimed is:] [1.]an outer cover formed of a blank of readily foldable material,said blank having its opposed end portions reversely folded to define opposed end pockets,said blank being reversely folded about a transverse medial foldline to define overlying panels whereby one of said overly

[What is claimed is:] [1.]an outer cover formed of a blank of readily foldable material,said blank having its opposed end portions reversely folded to define opposed end pockets,said blank being reversely folded about a transverse medial foldline to define overlying panels whereby one of said overlying panels includes an extended portion,an independent insertable thermal liner having a size substantially co-extensive in length and width of said overlying panels of said outer cover blank,said thermal liner being reversely folded about a transverse foldline and having its opposed ends removably inserted into said end pockets,and means for securing together the outer side edges of said overlying panels of said reversely folded cover blank,said extended portion of said cover blank defining a closure flap,and fastening means for securing said closure flap to the other panel defined by said blank in the closed position.