Poling machine

Details Poling machine Poling machine

H - Electricity

01

G

204/182, 204/96.

H01G 7/02 (2006.01) H01L 41/26 (2006.01)

Patent

CA 1043289

ABSTRACT An apparatus and method for continuously poling a film of material exhibiting pyroelectric and/or piezo- electric characteristics are disclosed. The apparatus includes a drive for advancing the film, a hot poling roller, a cold fixing roller, and a pair of electrodes that establish an electric field across the film while it is heated by the hot roller. In a first embodiment, one side of the firm is coated with a conductive layer that is electrically grounded to serve as a ground electrode and the poling roller serves as a high voltage electrode for establishing the electrica. field across the film. In a second embodiment, the poling roller is electrically grounded and a plurality of corona charging devices are employed as the high voltage electrode. In both embodi- ments, the high voltage electrode is separated from direct physical contact with the film by an insulating layer in order to avoid serious damage to the film due to electrical arcing that can occur through a defective or thinner than normal area of the film.

226630

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