Multi-layer heat insulating container
A storage container includes a receptacle having a circumferential sidewall and a sleeve fixedly attached to the receptacle having a circumferential sidewall with a left edge, a right edge, and marginal portions adjacent the left and right edges wherein the edges meet to form a butt seam. The receptacle sidewall and the sleeve sidewall define an insulating layer therebetween. The insulating layer includes a first edge and a second edge wherein the first and second edges do not extend under the marginal portions such that the insulating layer has a smaller circumference than that of the sleeve sidewall. A method for forming a storage container is also provided.
1. A storage container comprising:
a receptacle having a circumferential sidewall; and
a sleeve fixedly attached to said receptacle having a circumferential sidewall with a left edge, a right edge, and marginal portions adjacent said left and right edges wherein said edges meet to form a butt seam and both of said marginal portions are substantially joined directly to said receptacle sidewall to form a recessed channel extending along the entire height of said sleeve;
wherein said receptacle sidewall and said sleeve sidewall define an insulating layer therebetween, said insulating layer having a first edge and a second edge wherein said first and second edges do not extend under said marginal portions such that said insulating layer has a smaller circumference than that of said sleeve sidewall.
2. The container of claim 1 wherein said insulating layer is formed from a thermoplastic synthetic resin.
3. The container of claim 1 wherein said insulating layer is formed of a paper product.
4. The container of claim 3 wherein said paper product is deformed to create air gaps therewithin.
5. The container of claim 2 wherein said thermoplastic synthetic resin is a foamed polymer selected from the group consisting of polyethylene, polyolefin, polyvinylchloride, polystyrene, polyester, nylon, and mixtures thereof.
6. The container of claim 5 wherein said insulating layer is formed by coating an outer surface of said receptacle sidewall or, in the alternative, an inner surface of said sleeve sidewall with a thermoplastic resin.
7. The container of claim 1 wherein said sleeve sidewall is joined to said receptacle sidewall by heat-sealing said seam.
8. The container of claim 1 wherein said sleeve sidewall is joined to said receptacle sidewall by sonically welding said seam.