Tubular wrapping mechanism for packaging stacks of small items - has expanding mandrel in front end of tube divided across its longitudinal axis into expanding head and guide pin.

摘要

The expanding mandrel (4) can be set on the magazine mandrel (5) which guides the stack of items. Guide members (32) are associated with the guide pin (42) which is located underneath a separator (35,36) for the wrapping tube. The rise and fall gripper (7), which moves the tube is associated in the lift direction with a stepped drive (73). The drive first step corresponds to the length of the non-shrunk tube section (2'),while its second step corresponds to the length of the guide pin.After the cutting process, the leading edge of the tube is expanded to the full width and drawn easily over the head of the magazine mandrel and top edge of the stack. ADVANTAGE - Increased reliability,and low mfg.and maintenance cost.