TONER RECOVERING AND REUSING DEVICE OF ELECTROPHOTOGRAPHIC COPYING MACHINE

摘要

PURPOSE:To prevent a drop in the toner separating efficiency of a cyclone filter, by providing a magnet roll inside a non-magnetic cylindrical sleeve fitted and fixed to a rotary valve installed to the dust collecting section of the cyclone filter in a relatively rotatable condition and producing an attracting magnetic field to the cyclone filter side and a repulsing magnetic field to an auger side. CONSTITUTION:Since a magnet roll 53 remains stopped even when a cylindrical sleeve 52 rotates together with a rotary valve 2, micro-carrier contained in recovered toner is attracted to the rotary valve 2 in the vicinity of its boss section 50 by the attracting magnetic field of the magnet roll 53. When the micro-carrier reaches an opening section A, where the magnet roll 53 forms a repulsing magnetic field, after moving together with the rotating rotary valve 2, the micro-carrier is separated from its attracted position and fall onto an auger 3 through the opening section A. Therefore, it is prevented that the micro-carrier enters into the space between the outer peripheral surface of the rotary valve 2 and the cylindrical inner wall 6a of a containing chamber 6 and increases the sliding resistance between them. Since the outer peripheral surface of the valve 2 is free from the damage, friction between the outer peripheral surface and the inner wall 6a is not accelerated, and airtightness is not lowered, a drop in the toner separating efficiency of this cyclone filter 1 can be prevented even if this filter 1 is used for a long time.