METHOD OF REMOVAL OF ELECTROSTATIC CHARGES FROM TRAYS USED FOR TRANSPORTING ROD SHAPED ELEMENTS, TRAY PROTECTED AGAINST NEGATIVE ACTION OF ELECTROSTATIC FIELD AND DEVICE FOR UNLOADING TRAYS FILLED WITH ROD SHAPED ELEMENTS WITH SIMULTANEOUS REMOVAL OF ELECTROSTATIC CHARGES

摘要

A method of removing electrostatic charges from the tray (1 1 ) consists in supplying pressurized ionized air first along the bottom (12 12 ) of the already turned over tray (1 1 ) and then when unloading the tray (1 1 ) along its side walls (15 15 ) or the inner walls (14) of a compartment (13). The tray (1 1 ) made of dielectric material protected against negative action of the electrostatic field is provided inside with an insert (22 22 ) of conducting material whereas the insert (22 22 ) may have different shapes. The device for unloading compartment trays (1) made of dielectric material is provided with an ionizer (10) disposed horizontally along the linear transporter (5) in the zone of feeding of the trays (1) whereas its nozzles (11) are turned in the direction of the inside of the bottom (12). Furthermore the device has two ionizers (10) disposed vertically above an immovable throat (9) through which the rod shaped elements are unloaded within a distance of each other corresponding to the width of the compartment (13) whereas the nozzles (11) of the ionizers (10) are turned in the direction of the corresponding inner wall (14) or side wall (15) and all ionizers (10) are disposed in one vertical plane within a small distance of the tray (1). The ionizers (10) may have the shape of a longitudinal beam with a centrally disposed duct (18) supplying compressed air to a row of nozzles (11) and on both sides of the nozzles (11) are situated ionizing brushes (19) connected to a voltage source.