Oji Seitai Kaisha, Ltd.

Oji Seital Kaisha, Ltd.

Masahiro Tsukuda

Hiroshi Iwasaki

Katsumi Hayakawa

Tadao Masuda

Shigeru Doiura

Kaoru Kawanishi

Yukiyoshi Sato

Kazuya Yamasaka

Junichi Tatewaki

An unwrapping apparatus for unwrapping a palletized load with a film wrapping articles. The apparatus includes at the front side thereof lower grippers and upper grippers to grip lower and upper edges of a film of the load, respectively, and a cutter unit for vertically cutting the front side of the gripped film. The lower grippers are movable in the direction toward and away from the load as well as in the direction parallel to the load conveying direction. The unwrapping apparatus includes at the rear side thereof a vertically movable carriage with a platen to stabilize the load and a pair of swing arms. The swing arms carry the upper grippers and can swing to spread and remove the film. The platen includes a Z-shaped suction groove to retain the film on the top of a load and a heat cutter extending along the suction groove to cut the film of the top of the load held by the suction groove, for unwrapping the shrink-wrapped load.

Unwrapping apparatus for stretch-wrapped load and shrink-wrapped load

An automatic stretch-wrapping apparatus for wrapping a load, including empty PET bottles, with a stretchable film. The apparatus includes a turntable for placing the load thereon, and the stretchable film is supplied from a roll of stretchable film in a vertical position via film tensioning rollers to a gripper device. The gripper device is mounted on the turntable for gripping the leading end of the film and can rotate not only with the turntable but also relative to the turntable. Also, a swing arm device is arranged for movement toward and away from the gripper device to cooperate with the gripper device and includes pusher blades for pushing the film toward the gripping fingers of the gripper device, a heatsealer, and a cutter. It is possible to automatically wrap the load by the film in only one turn thereof.

Automatic full-web stretch-wrapping apparatus

An unwrapping apparatus for unwrapping a palletized and stretch-wrapped load, including at the front side thereof lower grippers and upper grippers to grip the lower edge and upper edge of a stretchable film of the load, respectively, and a cutter unit for vertically cutting the stretchable film. The unwrapping apparatus includes at the rear side thereof a carriage having a platen to press the top of a load, a pair of swing arms carrying the upper grippers, and a pair of auxiliary film separating swing arms to separate the stretchable film from the rear corner portions of the load when the film is removed from the load by the main swing arms. The main swing arms and the auxiliary swing arms prevent the articles from being pulled and moved by the stretchable film in contact with the articles and thus falling down from the separate sheet in particular.

Unwrapping apparatus with swing arms and grippers

An unwrapping apparatus for unwrapping a palletized and stretch-wrapped load, the apparatus enables the prevention of the articles from falling off and easy disposal of the used stretchable film. The apparatus comprises first and second upright frames between which a load to be unwrapped is conveyed, the first upright frame including two lower grippers for gripping a lower edge of the stretchable film, and an elevated cutter unit having two pairs of pinch rollers and a heat cutter. The second upright frame includes a carriage having a platen to press the top of the load to be unwrapped and a pair of swing arms symmetrically arranged on either side of the platen and extending toward the first upright frame. Upper grippers are secured to the swing arms, respectively. The stretchable film can be gripped during the cutting and unwrapping of the load to maintain tension and prevent the articles in the load from falling off. In addition, the used stretchable film can be discharged in a compressed, compact form.

Growing community of inventors

Takatsuki, Japan

Masahiro Tsukuda