Patent ID: 8479938

Claim:
A sealed composite bin for accommodating and delivering powder or particle material, comprising: multiple main bin units arranged vertically and connected with each other, wherein each main bin unit has a vertical axis and includes an arched main top part, a cylindrical main side wall having a height and a radius, and a conical main bottom part, wherein each of the main side walls has same radius, and the multiple main bin units are arranged in a line with a distance between the vertical axes of adjacent main bin units being less than the sum of the radii of the two corresponding main side walls, and the multiple main bin units are communicated with each other; wherein said composite bin further includes a supplementary bin unit having a vertical axis and disposed between the adjacent main bin units, and each of the supplementary bin units includes a supplementary top part which is connected to the main top parts of the adjacent main bin units and cylindrical supplementary side walls having a height and a radius which are connected to the cylindrical main side walls of the adjacent main bin units.