STATIC ERASER

• Main Author: MORIYA JUNICHI
• Format: Patent
• Language: English
• Published: 29.10.1999
• Edition: 6
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BASIC ELECTRIC ELEMENTS; CORONA DEVICES; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES; MAKING GRANULES OR PREFORMS; NATURALLY-OCCURRING ELECTRICITY; OVERVOLTAGE ARRESTERS USING SPARK GAPS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SPARK GAPS; SPARKING PLUGS; STATIC ELECTRICITY; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a static eraser of satisfactory durability, capable of efficiently generating ions by stable corona discharge, in which material grain or the like passing at high speed will not come into contact with an electrode even when used in the middle of suction carry of molding material grain. SOLUTION: A discharge electrode part is provided in a flow passage (c), having an inflow port at one end and an outflow part at the other end, and air introduced from the inflow port is ionized in the flow passage (c) to be jetted as ion blows from the outflow port in this static eraser. In this case, the discharge electrode part has a pair or more of needle electrodes 4 protruding into the flow passage (c), a step part 3 of which inner diameter is larger on the down-stream side than on the up-stream side is formed in the flow passage (c), the needle electrode 4 is installed on the step part 3 to be directed toward the down-stream side, and a grounding electrode 5 is provided on the down- stream side of the step part 3 in the condition, where it will not come into contact with the tip part of the needle electrode.