B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
105/123, 20/12.1
B65D 90/54 (2006.01) B65D 90/62 (2006.01)
Patent
CA 1165085
Abstract So that the freight or storage tank for bulk material, that has at least one long emptying hole on the bottom, can be closed and opened, the tank has at least one flexible belt that extends essentially over the length of the opening and whose one end is attached to the tank, and under which is a roller or roller system that is approximately of the same length and that supports the belt when in the closed position and that can be removed from the closed position, as well as elements to move the roller or roller system across the opening between two extreme positions. Elements that guide the roller or roller system between the said two extreme positions by way of the top dead center and operating elements that force the roller or roller system over the said top dead center are fitted onto the tank's frame so that the opening is closed more firmly the greater the tank's load and so that the load's weight is used in opening the opening and so that a loosening effect upon the tank's contents is achieved when the opening is opened. The belt may also be endless essentially covering the whole width of the opening and mounted over the roller system's rollers.
397788
Esko Poltto Oy
Fetherstonhaugh & Co.
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