PNEUMATIC TONER TRANSPORT ARRANGEMENT FOR AN ELECTROPHOTOGRAPHIC PRINTING OR COPYING MACHINE.

摘要

PCT No. PCT/EP93/02805 Sec. 371 Date May 22, 1995 Sec. 102(e) Date May 22, 1995 PCT Filed Oct. 12, 1993 PCT Pub. No. WO94/09412 PCT Pub. Date Apr. 28, 1994.A pneumatic toner transport device for an electrographic printing or copying machine is used for transporting toner and for removing toner and/or dirt particles from units of the machine, such as developer station (10) and cleaning station (28). It contains a vacuum-producing device (31), which is connected via a vacuum duct system to the various units of the machine. Assigned to the duct system is a particle separator (24) in the form of a cyclone filter for separating toner and dirt particles out of an airstream flowing through. The particle mixture is separated in a recycling device into dirt particles and recyclable toner and the recyclable toner is supplied anew to the developer station. The dirt particles are collected in a fine filter (32) of the vacuum-producing device (31). The toner recycling device (25) is designed as an exchangeable constructional unit, which can be exchanged for a catchbox.