| 摘要 |
1, 156, 055. Producing and removing electrostatic charges. EASTMAN KODAK CO. June 30, 1966 [July 2, 1965], No. 29374/66. Heading G2H. [Also in Division H1] An apparatus for generating a flow of ionized gas has a housing (11) of metal Fig. 2 (not shown) or dielectric material Fig. 3 (not shown) extending beyond the edges of a moving dielectric web W, Fig. 1. Compressed air or other gas, e.g., nitrogen or a rare gas, is supplied through a connector 19. A corona discharge device 21 has a plurality of needle electrodes 23 spaced along a rod 22 adjustably mounted in a slot (25, Fig. 2, not shown) with respect to a slot (16). An earthed voltage source 28 which may be A. C. or D. C. is connected to rod (22, Fig. 2, not shown) and to lips (15) or conducting strips (32, Fig. 3, not shown) through a resistor (31) in each case. The apparatus may be utilized for removing electrostatic charges from film prior to entering a contact printer or enlarger, for altering the electrostatic charge on a web, or for removing particulate matter therefrom.
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