THIN SEALING DEVICE FOR SIDE SEALING MACHINE

摘要

A thin sealing device (230) which is resistant to damage caused by foreign material (700) is disclosed. The thin sealing device (230) has an internal heating element. The thin sealing device has a blunt edge (236), which has a radius smaller than that of the heating element. A thermocouple is placed in a cavity (235) near this blunt edge (236) to monitor the temperature at the point of sealing. In some embodiments, the thin sealing device (230) is pivotably attached to the side sealing machine at its leading (upstream) edge. The trailing (downstream) edge of the thin sealing device (230) is moved by means of a compressible force, such as an air cylinder (660). In this way, the air in the cylinder (660) pushes the thin sealing device (230) downward into the plane of the film (237). However, a foreign object (700) located on the film can overcome the force of the air cylinder (660), thereby lifting the thin sealing device (230) out of the path of the film (237).