PARISON MARKING METHOD AND WALL THICKNESS ADJUSTING APPARATUS

摘要

PROBLEM TO BE SOLVED: To form a ring mark of an uneven shape around the periphery of a parison by fluctuating a parison wall thickness controlling set value, and to disuse a conventional pen or spray or the like. SOLUTION: The parison marking method and a wall thickness adjusting apparatus by this invention a method and a formation in which a ring mark (22) consisting of an unevenness shape around the periphery (10a) of the parison (10) is formed by fluctuating a parison wall thickness controlling set value at that time for every fixed spacing in one cycle which controls the wall thickness of a parison (10). COPYRIGHT: (C)2006,JPO&NCIPI