Top closure member for a storage bin

A closure member for a top opening of a storage bin:

• wherein the storage bin includes a roof with a top opening through which the bin can be filled by material discharged downwardly through the opening;
• the closure member comprising:
• a sleeve for engagement with the bin at the opening, the sleeve having a peripheral wall surrounding an axis of the sleeve;
• the sleeve being arranged to be mounted on the bin at the opening so as to hold the axis to stand substantially upright from the opening with the sleeve extending upwardly from the opening;
• the sleeve defining an open top end for pouring material through the sleeve into the bin;
• a cover plate for movement between a closed position covering the open top end and an open position in which the open top end is exposed;
• wherein the cover plate has a depending lip for surrounding an outer surface of the sleeve at the open top of the sleeve,
• wherein there is provided a track extending generally horizontally from the open top of the sleeve to one side thereof for carrying the cover plate from the closed position to the open position at the one side;
• and wherein the track is shaped to lift the lip over the open top end to allow the cover plate to move to the side.

A closure member for a top opening of a storage bin:

• wherein the storage bin includes a roof with a top opening through which the bin can be filled by material discharged downwardly through the opening;
• the closure member comprising:
• a sleeve for engagement with the bin at the opening, the sleeve having a peripheral wall surrounding an axis of the sleeve;
• the sleeve being arranged to be mounted on the bin at the opening so as to hold the axis to stand substantially upright from the opening with the sleeve extending upwardly from the opening;
• the sleeve defining an open top end for pouring material through the sleeve into the bin;
• a cover plate for movement between a closed position covering the open top end and an open position in which the open top end is exposed;
• wherein the sleeve includes a cylindrical portion and a bottom tapered portion which tapers downwardly and inwardly from the cylindrical portion to a bottom edge and wherein the tapered portion is arranged to fit in a bin opening having a smaller diameter than the cylindrical portion.