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IMPROVED TONER HANDLING WITH CIRCULAR SHOCKLESS STATIC ELIMINATORS

IP.com Disclosure Number: IPCOM000027304D
Original Publication Date: 1996-Feb-29
Included in the Prior Art Database: 2004-Apr-07

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a method of using and a circular shockless static electricity discharge device to improve the flow of toner through, for example, cyclone separators, hoppers and other toner handling equipment and containers. Toners can frictionally charge against the walls of the processing equipment and cause electrostatic build up of electrostatically charged toner on the walls and result in loss of product, and in extremes cases, the need to shut down and clean the equipment. By using static eliminators, the charge build up can be reduced, allowing better flow of the toner. Static eliminators are commercially available and have been used for reducing charge on powders in general, for example, in industrial filling operations. Thus, in an exemplary embodiment, a toner handling system comprising an upper coarse particle collector hopper and a lower coarse particle collector hopper, with a flow valve and a communicating passage therebetween, is fitted with a circular or circumferential shockless static eliminator between the valve and the lower coarse particle collector and wherein static charging and build up of toner particles are eliminated. The static eliminator may be optionally attached to ground or to a power supply as appropriate for controlling toner particle charging.