Patent Number: 6,308,493

Title: Film wrapping machine control system and method

Abstract: A control system and control method for use in a machine for wrapping an article in plastic film are disclosed, the machine including a sealing head and a corresponding anvil movable by a pneumatic cylinder from an initial separated position to a contact position. The cylinder has an air exhaust outlet for exhausting air from the cylinder during operation of the cylinder from its initial state to an actuated state. A selectively actuatable valve disposed in the outlet selectively directs exhausting air through a first path of relatively low airflow resistance and a second path of relatively high airflow resistance. The valve directs exhaust air flow from the first path into the second path during operation of the cylinder and just prior to the cylinder being placed in the actuated state to cushion contact between the head and anvil.

Inventors: Mack; Daniel P. (Cincinnati, OH), Diekman; Donald R. (Batavia, OH)


International Classification: B65B 11/00 (20060101); B29C 65/00 (20060101); B65B 51/14 (20060101); B65B 009/06 (); B65B 057/00 ()

Expiration Date: 10/30/2018