Container with metallic cover and method of manufacturing the same

A method of manufacturing a container with a metallic cover comprising the steps of filling a plastic container body (14) with a content, sealing the container body (14) by roll-seaming a peripheral edge (12) of a metallic cover (11) around a flanged portion (15) of the container body (14), and heating the container body (14) at a temperature above a glass transition point and below a melting point of the container body (14) so as to form the container body (14) in substantially a spherical shape.

A method of manufacturing a container with a metallic cover comprising the steps of:

• preparing a sheet blank including a polyethylene-terephthalate layer containing a crystallization promoting nucleus;
• thermally forming, by an air or vacuum pressure formation technique, a container body with the thus prepared sheet blank, so that the degree of crystallization of the polyethylene-terephthalate layer is 10-40%;
• and roll-seaming a metallic cover around a flanged portion of the container body.

The method of claim 33, wherein the sheet blank has a layered structure including a polyethylene-terephthalate layer and an olefin layer containing a crystallization promoting nucleus.

An apparatus for manufacturing a container with a metallic cover comprising a cavity structure (104, 124) provided with an upper edge portion (103, 123) upwardly extending from an upper end (102, 122) of an outer periphery of the cavity structure, a plug (106, 126) for pressing a plastic sheet into the cavity (104, 124), and a clamp (105, 125) for abutting against the upper edge portions (103, 123) of the cavity for clamping the plastic sheet, the upper edge portion (103, 123) of the cavity (104, 124) upwardly extending with an inclination of 5.degree.<.theta.<40.degree., and the distance between the upper end (102, 122) of the outer periphery of the cavity structure and the inner peripheral surface of the clamp (105, 125) being representable by 5 mm<l<10 mm.

A container with a metallic cover comprising a container body having a plastic flanged portion, and a metallic cover having a peripheral edge which is roll-seamed around and with the flanged portion, wherein at least an inner surface of the peripheral edge of the metallic cover is coated with a heat sealing compound, through which the flanged portion and the peripheral edge of the metallic cover are fused and bonded together.

A container with a metallic cover comprising a container body having a plastic flanged portion and a metallic cover said flanged portion, wherein the container body is molded of a plastic sheet blank including a polyethylene-terephthalate layer and an olefin layer having a degree of crystallization of 10-40% by an air or vacuum pressure formation technique.

A container with a metallic cover comprising a container body having a plastic flanged portion and a metallic cover having a peripheral edge which is roll-seamed around and with said flanged portion, wherein the container body is molded of a plastic sheet blank including a polyethylene-terephthalate layer, an olefin layer and an ethylene-vinyl alcohol copolymer layer having a degree of crystallization of 10-40% by an air or vacuum pressure formation technique.

A container with a metallic cover comprising

• a container body having plastic flanged portion, said container body being formed of a plastic material prepared by thermally forming a laminated sheet of a polyethylene-terephthalate and a polyallylate;
• and
• a metallic cover having a peripheral edge which is roll-seamed around and with the flanged portion.

A container with a metallic cover comprising:

• a container body having a body portion and a bottom portion which are formed by thermally forming a laminated sheet, and a plastic flanged portion extending from the container body portion which is formed by an insert injection method performed along a peripheral edge of an upper end of the container body portion;
• and
• a metallic cover having a peripheral edge which is roll-shaped around and with the flanged portion.

A container with a metallic cover comprising:

• a plastic container having a body portion with a plastic flanged portion extending from an upper portion thereof, and an annular rib formed on an inner wall of the container body at a distance h.sub.1 below the flanged portion, wherein the distance h.sub.1 and the thickness h.sub.2 of the container body on which the rib is provided have the relationship .vertline.h.sub.1 -h.sub.2 .vertline..ltoreq.0.3 mm;
• and
• a metallic cover having a peripheral edge which is roll-seamed around and with the flanged portion.