Material or article handling – Device for emptying portable receptacle – With container opening means
Patent
1994-09-06
1997-06-17
Keenan, James W.
Material or article handling
Device for emptying portable receptacle
With container opening means
198671, 1985501, 2411865, 241DIG38, 414326, B02C 1922
Patent
active
056392028
ABSTRACT:
A bag opening machine includes a trough and a feed screw that is rotatably mounted in the trough to advance bags that at least partially fit between the flight of the feed screw along the length of the trough. There are a pair of restrictions that the bags encounter that cause the bags to be ripped open as the part of a bag caught between the flight continues to advance while the part that is not within the flight is blocked from further advancement. The machine has a shear plate running the length of the trough which not only enhances longevity, but also provides a surface against which bags between the flight rub to be opened. Each of the restrictions is lined with another shear plate, and the leading faces of the restrictions are also reinforced against wear. An expansion chamber is located between the two restrictions. The restrictions completely surround the feed screw, which is mounted eccentrically in the opening defined by the feed screw. The clearance between the feed screw and the opening is selected to maximize through-put of bags while minimizing breakage of materials in the bags, especially glass. An alternative embodiment includes a feed-back controlled gate which enlarges one or both of the restrictions when the load on the motor is such as to indicate that the motor is about to stall. The gate stays in the open position until the feed screw had completed a full revolution and then it is returned to its initial position. A hinged lid over the expansion chamber helps prevent the build-up of excess material. At the outlet end, the feed screw has a conical anti-clogging device that directs materials out of the feed screw, especially long strips that might have gotten wrapped around the feed screw.
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Keenan James W.
Magnificent Machinery, Inc.
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