Patent ID: 6059144
Filing Date: 2000-05-09
Classification: B29B,B29C,B29K,G01F,G01G

Abstract:
A proportioning apparatus comprising at least one reservoir tank having an outlet port for pourable bulk material, and a weighing tank for receiving bulk material discharged from said at least one reservoir tank, said weighing tank being arranged under the at least one reservoir tank and including a weighing cell for weighing bulk material, a shut-off device associated with each reservior tank for opening and closing the outlet port of the respective reservoir tank, each shut-off device comprising a tubular housing and a closure element received in the tubular housing, each tubular housing having a passage opening for the bulk material extending transversely of a longitudinal axis of the tubular housing, each passage opening having two breakthroughs extending through upper and lower surfaces of the tubular housing, the outlet port of each reservoir tank communicating with the passage opening of the associated shut-off device, and each closure element having a cross section corresponding to that of the tubular housing in which it is received and being shiftable along the longitudinal axis of the tubular housing between open and closed positions within the housing, said closure element opening or closing said passage opening depending on the position into which it is shifted.