Importance

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Abstract

A stretch wrapping apparatus for use with an automated palletizing machine to securely stabilize loads. A stretch wrapping head feeds pre-stretched wrapping film toward the rotating load and air jets blow the tail of the film onto the load. Relative rotational movement is created between the wrapping head and the load and the free end of the film is unsupported by any mechanical structure and is directed toward the load only with air from the jets. The film attaches to an outer surface the load. Film is dispensed at a rate to provide payout of film that is consistent with the demand as each load corner transitions through its relative distance change from the dispensing point based on calculations intervals. A sensor detects changes in the optical character of the film to determine an out of bounds condition such as a film break.

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First Claim