Compact food tray film wrapping machine

Package making – Apparatus for contraction of cover by stretching or shrinking


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53222, 53226, B65B 1118




There is disclosed an improved form of ejection and transport mechanism in a tray wrapping machine with an elevator that elevates a tray of meat or other product causing it to be wrapped on top and sides by a sheet of stretchable PVC film from a storage roll after which arms fold the edges of the film underneath the tray; the mechanism includes a pusher bar which pushes the fully wrapped tray off of the side of the tray elevating platform while the tray is constrained by a freely rotating endless hold-down belt serving to restrain and guide the tray; the tray is received from the pusher bar action onto a powered roller conveyor with rolls arranged radially along an arc of; the motion of the finished tray upon exiting the roller conveyor is substantially parallel to the longitudinal axis of the tray wrapping machine defined by the direction of travel of the PVC film from the storage roll to the elevator position.

patent: 3369646 (1968-02-01), Musser
patent: 3662513 (1972-05-01), Fabbri
patent: 3724643 (1973-04-01), Kohl
patent: 4631903 (1986-12-01), Takamura
patent: 4683707 (1987-08-01), Koyama
patent: 4730441 (1988-03-01), Terminella
patent: 4796405 (1989-01-01), Owen


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