Siegelvorrichtung einer Verpackungsmaschine.

摘要

A total heating calorie to be given to the folded parts is changed within a short period of time in response to a variation of a transferring speed of the box-like items. As the heater moving mechanisms 4 are operated, each of the heater blocks 3 is moved to or away from the inside parts 2a of each of the annular belts 2 in synchronous with the transferring speed of the box-like items A and the number of heater blocks 3 abutting against the inside parts 2a of each of the annular belts 2 is varied in response to the transferring speed of the box-like items A.