Sperry Corporation

Harry C Eberly

Shaun A Seymour

Robert M VanGinhoven

A method used to wrap roll bales of crop material with plastic film. The method involves holding the end of a supply roll of plastic film between stationary feed rolls as a bale is formed, and then delivering the end of the plastic film to the outer surface of a completed roll bale by driving the feed rolls. The method also involves wrapping the roll bale with a suitable number of layers of the plastic film by driving the feed rolls while rotating the roll bale, and then severing the plastic film at a location between the roll bale and the feed rolls by stopping the feed rolls and moving a cutoff bar into contact with the plastic film while continuing to rotate the roll bale.

Method of wrapping roll bales with plastic film

A baler adapted to form round bales including a support for a supply roll of stretch cling-type of plastic film, power operated nip rolls to engage the outer end of said roll of film, a drag brake on said support to maintain tension on said film, cut-off mechanism including a toothed bar positioned below the roll of film and movable between operative and inoperative positions relative to said film, an electric switch near the operator's position to control a solenoid which moves the cutoff bar to inoperative position, support mechanism for rotating a roll bale to be wrapped with the film, powered mechanism to rotate the roll bale to be wrapped with the film while the nip rolls feed the free end of the film into engagement by the rotating bale roll for encircling the same with multiple convolutions of the film while the drag brake maintains tension thereon and rotation of the nip rolls then being stopped and the electric switch being operated to cause the solenoid to move the cutoff bar to operative position to engage the film and sever it while the film on the supply roll is engaged by the stopped nip rolls and thereby complete the wrapping of the roll bale with the film.

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Narvon, PA, United States of America

Harry C Eberly