A METHOD AND DEVICE AT A LONGITUDINAL JOINT SEALING OF A PACKAGE BLANK

摘要

A longitudinal joint sealing with induction heat of a packaging blank (1) of polymer lined metal plate is accomplished by means of an inductor (2) for application against a joint, formed by an upper member and a lower member. For obviating burning of decoration on the upper member the return current of the inductor is conducted via the lower member.