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IP.com Disclosure Number: IPCOM000025925D
Original Publication Date: 1989-Feb-28
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal


In a highlight color copier, one developer unit employs black toner and the other a colored toner. The black toner is magnetic while the colored toner is non-magnetic. During cleaning, the black liquid developer and the colored liquid developer are mixed. A magnetic separator may be used to filter out the black toner. The separator includes a tube filled with steel wool surrounded by a magnet. The magnet may be a permanent magnet or an electromagnet. The steel matrix provides the high magnetic gradients required for efficient capturing of the black magnetic toner to clean the colored liquid developer.