Heat insulating paper cups

Details Heat insulating paper cups Heat insulating paper cups

B - Operations, Transporting

65

D

B65D 3/12 (2006.01) B29C 44/12 (2006.01) B31B 1/60 (2006.01) B31B 7/00 (2006.01) B31B 15/00 (2006.01) B31B 17/00 (2006.01) B32B 1/00 (2006.01) B32B 5/18 (2006.01) B32B 27/10 (2006.01) B65D 81/38 (2006.01)

Patent

CA 2262458

A heat insulating paper cup having an improved seal. The cup (1) can include a body member (3) having an inside surface and an outside surface, and a bottom panel member (6) having an upper surface (7) and a bottom surface (8). The body member comprises a paper sheet (2) which is coated (or in some instances partially coated) on its outside surface with a heat insulating layer of foamed low density polyethylene (4) and on its inside surface with an unfoamed modified low density polyethylene (5). The bottom panel member (6) is coated on its upper surface with a foamed or an unfoamed low density polyethylene or foamed or unfoamed modified low density polyethylene (7). The body member (3) and bottom panel member are oriented and joined to form a heat seal at an interface between a portion of the unfoamed modified low density polyethylene coated on the inside surface (5) of the body member and a portion of unfoamed low density polyethylene or unfoamed modified low density polyethylene or unfoamed modified low density polyethylene coated on the upper surface (7) of the bottom panel (6).

L'invention porte sur une tasse en papier isolée thermiquement à joint renforcé. Ladite tasse (1) comporte un corps (3) présentant une surface intérieure, une surface extérieure et un fond (6) présentant une surface supérieure (7) et une surface intérieure (8). Le corps consiste en une feuille de papier (2) revêtue (dans certains cas partiellement) côté extérieur d'une couche isolante de polyéthylène (4) basse densité et côté intérieur de polyéthylène (5) basse densité modifié non expansé. Le fond (6) est revêtu sur sa surface supérieure de polyéthylène (7) basse densité modifié expansé ou non expansé. Le corps (3) et le fond sont orientés et reliés de manière à constituer un joint thermique au niveau de l'interface entre une partie du polyéthylène (5) basse densité modifié non expansé de l'intérieur du corps et une partie de polyéthylène (7) basse densité modifié expansé ou non expansé revêtant la surface supérieure du fond (6).

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