Bag mouth opening method and apparatus for use in bag filling and packaging
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United States of America Patent
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Mar 21, 2017
Grant Date -
Apr 17, 2014
app pub date -
Aug 9, 2013
filing date -
Oct 12, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
Provided are a bag mouth opening method and apparatus capable of surely and stably opening into a desired shape the mouth of a spout bag having a spout attached to an upper edge-side portion thereof. A spout tilting relative to a bag is corrected into a non-tilting position and pinched with spout pinching members opened and closed by a first air cylinder of a spout holding device. The first air cylinder is held in an initial position in the width direction of the bag by a second air cylinder through a quadric link comprising a connecting rod mounting plate, a connecting rod, a connecting plate, and a second support arm. The interior of the second air cylinder is opened to the atmospheric pressure in synchronism with the start of movement away from each other of a pair of suction cups of a bag mouth opening device and movement toward each other of a pair of gripping members gripping the laterally opposite side edges of the bag. Consequently, the first air cylinder and the pinching members attached thereto become free to move in the width direction of the bag and thus are moved through the bag in accordance with the movement of the gripping members.
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