METHOD FOR CURLING MOUTH PART OF SYNTHETIC RESIN CONTAINER AND LOCAL HEATER USED THEREIN

摘要

PROBLEM TO BE SOLVED: To provide a processing method locally heating a region to be curled to bend and curl the mouth flange part of a container downwardly or inwardly, a method for curling the mouth part of a safe synthetic resin container not injuring a lip by a mouth part and ensuring the max printing area on the side surface of the container and to provide a local heater used in those method. SOLUTION: In a synthetic resin container consisting of a container main body 11 and the opening flange 14 extending from the outer periphery of the opening part 12 of the container main body and having a mouth part formed by the curl processing of the opening flange, the rear surface of the opening flange is locally heated by a local heater 30 and, thereafter, the opening flange is subjected to curl processing.