Electric heating – Metal heating – Cutting or disintegrating
Patent
1987-04-08
1988-10-11
Pellinen, A. D.
Electric heating
Metal heating
Cutting or disintegrating
204168, 219384, 264 22, 264154, 361303, H05B 718, B29D 701, H01G 428
Patent
active
047773383
ABSTRACT:
Spark perforation of synthetic plastic film is carried out by applying electrodes to opposite ends of a portion of the film submerged in a water bath that is at a temperature above the onset temperature of glass transition of the film,and applying short fast rise time electrical pulses of an amplitude sufficient to ensure dielectric breakdown of the film. The size of the perforations formed can be controlled by altering the temperature of the water bath. By using short fast pulses, energy consumption, film decomposition and electrode erosion are minimized, and the high dielectric strength of water can be exploited to control perforation while its conductivity can be exploited to remove residual electric charges from the film. Capacitors formed by lengths of coaxial cable are used by a pulse generator for generating pulses having rise times less than one microsecond.
REFERENCES:
patent: 2513838 (1950-07-01), Beall
patent: 2785280 (1957-03-01), Eisler et al.
patent: 3502845 (1970-03-01), Schirmer
patent: 3665157 (1972-05-01), Harada
patent: 3802396 (1975-01-01), Machida et al.
patent: 4261806 (1981-04-01), Asai et al.
patent: 4303733 (1981-12-01), Bulle et al.
patent: 4314142 (1982-02-01), Brown et al.
patent: 4487671 (1984-12-01), McGeough
patent: 4488030 (1984-12-01), Cross
patent: 4534994 (1985-08-01), Feld et al.
patent: 4578556 (1986-03-01), Inoue
patent: 4584450 (1986-04-01), Inoue
patent: 4626332 (1986-12-01), Inoue
patent: 4628170 (1986-12-01), Furukawa
Evans Geoffrey S.
Pellinen A. D.
LandOfFree
Perforation of synthetic plastic films does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Perforation of synthetic plastic films, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Perforation of synthetic plastic films will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1959487