초록 ▼

A fabricated cup or nestable container having a unitary sidewall formed from a double-ended sheet of a heat-shrinkable thermoplastic material, the inner suface of which is adapted to contact a liquid product to be contained in said container. The ends of the sheet are joined to one another forming a

A fabricated cup or nestable container having a unitary sidewall formed from a double-ended sheet of a heat-shrinkable thermoplastic material, the inner suface of which is adapted to contact a liquid product to be contained in said container. The ends of the sheet are joined to one another forming a liquid-tight seam extending from the top to the bottom of said container. An open mouth at the top is defined by the upper portion of the sidewall. The container sidewall tapers inwardly and downwardly from the open mouth for a major portion of the height of said container. The thickness of the sidewall increases continuously and progressively over this major portion from a lesser thickness at the top thereof to a greater thickness at the bottom thereof. The density of the sidewall continuously and progressively decreases over this major portion from a greater density at the top thereof to a lesser density at the bottom thereof. A separate bottom closure may be joined in a liquid-tight manner to the lower end of the container sidewall to form a two-piece container. Alternately, a bottom closure may be formed from an integral extension of the sidewall by shrinking and sealing the extension to produce a one-piece cup.

대표청구항 ▼

A nestable cup-like container comprising, in combination: a unitary sidewall formed from a double-ended sheet of an expanded heat-shrinkable thermoplastic material, and having an inner surface adapted to contact a liquid product to be contained in said container, the ends of said sheet being joined

A nestable cup-like container comprising, in combination: a unitary sidewall formed from a double-ended sheet of an expanded heat-shrinkable thermoplastic material, and having an inner surface adapted to contact a liquid product to be contained in said container, the ends of said sheet being joined to one another to form a liquid-tight seam extending from the top to the bottom of said container, said ends are of reduced thickness and increased density, said container having a mouth at its top which is defined by the upper portion of the sidewall, the sidewall continuously and progressively tapering inwardly and downwardly from the said open mouth for a major portion of the height of said container, the thickness of the sidewall continuously and progressively increasing over the said major portion from a lesser thickness at the top thereof to a greater thickness at the bottom thereof, as a result of heat shrinking said sheet the density of the sidewall continuously and progressively decreasing over the said major portion from a greater density at the top thereof to a lesser density at the bottom thereof; and a piece which is separate from said unitary sidewall and which is sealingly fused to an overlapping, laterally extending, inwardly folded, lowermost integral portion of the double-ended sheet from which the sidewall is formed, thereby closing the bottom of the container in a liquid-tight manner.