Package making – Methods – Wrapping contents including cover forming
Patent
1979-09-28
1982-03-16
Sipos, John
Package making
Methods
Wrapping contents including cover forming
53493, 53553, 53229, 198485, 198746, B65B 1108
Patent
active
043194435
ABSTRACT:
A machine in which a wrapping film extends across a path in which articles to be packaged are moved. The film is drawn from supply rolls above and below the path as an article or group of articles is moved along the path. The film is brought together and sealed behind the article or group of articles to form a tube, the tube is severed from the remaining film, and the remaining film is sealed together. The tube is then thermally shrunk. A cutting and sealing bar movable along a path inclined at an acute angle with the conveying path in part wraps the film about the article or group of articles, and severs and seals the film. An upright frame carries and guides the cutting and sealing bar and is adjustable about a pivot in the plane of the conveying path to vary the angle at which the cutting and sealing bar moves with respect to the conveying path. A film supply roll is carried by the frame so the path of the film from the supply roll relative to the frame is independent of the frame adjustment. The force with which the cutting and sealing bar is driven is reduced during lowering of the bar to avoid damage or injury if movement is obstructed. An article pusher positively advances articles for wrapping past the initial plane of the wrapping film and the path of the cutter bar movement, under control of an electric eye that prevents infeed of a subsequent article or group of articles until a preceding wrapping cycle is complete.
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Nordson Corporation
Sipos John
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