초록 ▼

A food delivery container is provided for pizza or other food items and includes a heating element having a phase change material such as a ultra-high molecular weight polyethylene which transforms from a solid to a semi-solid at approximately 248.degree.-275.degree. F. The heating element comprises

A food delivery container is provided for pizza or other food items and includes a heating element having a phase change material such as a ultra-high molecular weight polyethylene which transforms from a solid to a semi-solid at approximately 248.degree.-275.degree. F. The heating element comprises a rigid envelope which is permeable to prevent gaseous build-up during heating. The heating element, when placed within a suitable insulated container, will maintain food warm for several hours during storage or delivery. In one embodiment of the heating element, an electric resistance grid is provided for supplying heat energy.

대표청구항 ▼

[ I claim:] [1.] A food delivery container comprising: a bag, said bag defining an opening;means to close said opening, said closing means attached to said bag;a substantially planar heating element, said heating element contained within said bag, said heating element comprising a rigid metal envelo

[ I claim:] [1.] A food delivery container comprising: a bag, said bag defining an opening;means to close said opening, said closing means attached to said bag;a substantially planar heating element, said heating element contained within said bag, said heating element comprising a rigid metal envelope, said envelope formed from metal sheets approximately 1.5 mm thick; anda homogeneous phase change material, said phase change material positioned within said rigid metal envelope.