Electricity: electrical systems and devices – Electric charge generating or conducting means – Use of forces of electric charge or field
Patent
1980-10-16
1983-07-05
Rubinson, G. Z.
Electricity: electrical systems and devices
Electric charge generating or conducting means
Use of forces of electric charge or field
29 2535, H01F 102
Patent
active
043921787
ABSTRACT:
Polymeric films exhibiting piezoelectric properties have such properties enhanced by being subjected to improved poling apparatus of the present invention comprising a textured corona discharge electrode roller oscillating over the polymeric film, preferably polyvinylidene fluoride, while the film is simultaneously slowly transported on a rotating drum. The electrode continuously discharges corona through the film while sweeping back and forth thereover. Comparatively low voltages are employed and dielectric breakdown of the film is substantially non-existent. A protective reuseable co-film is preferably interposed between the oscillating electrode and film to be poled.
REFERENCES:
patent: 3391044 (1968-07-01), Kaghan et al.
patent: 3885301 (1975-05-01), Murayama
patent: 4047998 (1977-09-01), Yoshikawa et al.
patent: 4067056 (1978-01-01), Taylor et al.
patent: 4079437 (1978-03-01), Sheffield
patent: 4089034 (1978-05-01), Taylor et al.
"Corona Discharge Treatment Process and Apparatus", IBM Tech. Disclosure Bull., vol. 19, No. 5, Oct. 1976, p. 1644.
Pennwalt Corporation
Rubinson G. Z.
Schroeder L. C.
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