Patent ID: 6378270
Filing Date: 2002-04-30
Classification: B65B,B65D

Abstract:
A powder grain material control unit, comprising:a cylindrical filter cylindrically formed; a negative pressure chamber formed at an outer periphery of said cylindrical filter; means for generating negative pressure connected with said negative pressure chamber; and said cylindrical filter having a filter cylinder in the shape of a cylinder and an inside porous cylinder and an outside porous cylinder in the shape of a cylinder respectively holding an inner periphery and an outer periphery of said filter cylinder through gauze cylinders in the shape of a cylinder, and many air passing pores through which air passes being formed at said inside porous cylinder and said outside porous cylinder; wherein said cylindrical filter and said negative pressure chamber are attached to a powder grain material outflow portion from which a powder grain material is discharged, air in said negative pressure chamber is absorbed by said means for generating negative pressure, an inner peripheral portion side of said cylindrical filter is negatively pressurized so as to stop the discharge of said powder grain material in the inner peripheral portion of said cylindrical filter.