Can for packaging food for, e.g. people or pets, comprises lid formed of lidding material comprising multilayer structure with aluminum layer of specified thickness and bond layer

摘要

A can for packaging food, comprises a metal can body having an access opening (14); and lid (16) for closing the access opening. The lid is fixed directly to the can body. It is formed of lidding material comprising a multilayer structure with at least an aluminum layer of 6-90 microns thickness and a bond layer. Independent claims are also included for: (1) a method for manufacturing the can comprising supporting a lidding material on a punch; framing a metal can body having an outwardly extending curl at one end; supporting the opposite end of the can body on a base support; moving the can body and punch relative to each other; and drawing the lidding material which is carried by the punch along a surface of the can body which is parallel to or inclined at an angle to the can body center axis to form a cup-shaped lid from the lidding material; and sealing the lid directly to the can body surface; and (2) an apparatus for forming the can body comprising a metal can body having an outwardly extending curl at one end; base support for supporting the opposite end of the can body and comprising a plate with a central mandrel extending into the can body; and punch which has an end portion diameter which is an interference fit with the can body inner wall diameter and lid, in which the can body acts as a forming die so that lidding material which is carded by the punch is formed into a cup shape by drawing around the curl of the can body and held against the can body sidewall for bonding.