Electric heating – Heating devices – Electric arc-type devices
Patent
1979-12-21
1984-05-08
Shaw, C. C.
Electric heating
Heating devices
Electric arc-type devices
318618, H05B 718
Patent
active
044477090
ABSTRACT:
A method is provided for controlling the porosity of a web or film issuing from an electric spark perforating apparatus in accordance with an operator-set reference porosity regardless of variations in web speed, inherent web porosity, spark discharge energy and spark repetition frequency by controlling the frequencies of the electrical sparks applied to the web in accordance with the product of two signals, one a difference signal obtained by comparing the porosity of the web leaving the perforator and the reference porosity and the other signal derived from the speed of the web.
REFERENCES:
patent: 2372508 (1945-03-01), Meaker
patent: 2528157 (1950-10-01), Menke
patent: 2528158 (1950-10-01), Menke
patent: 2678373 (1954-05-01), Suran
patent: 2955206 (1960-10-01), Spergel et al.
patent: 3045222 (1962-07-01), Spergel
patent: 3098143 (1963-07-01), Warmt
patent: 3167641 (1965-01-01), Parmele et al.
patent: 3348022 (1967-10-01), Schirmer
patent: 3364390 (1968-01-01), Karp et al.
patent: 3371518 (1968-03-01), Keyes
patent: 3385951 (1968-05-01), Bancroft et al.
patent: 3404687 (1968-10-01), Rickards et al.
patent: 3424895 (1969-01-01), Olson
patent: 3466925 (1969-09-01), Ziegenhagen et al.
patent: 3502845 (1970-03-01), Schirmer
patent: 3760153 (1973-09-01), Davies et al.
patent: 3783237 (1974-01-01), McArthur
patent: 3862396 (1975-01-01), Machida et al.
patent: 4029938 (1977-06-01), Martin
G. Lago et al., Control System Theory Feedback Engineering, 1962, pp. 187-189, 236.
Olin Corporation
Shaw C. C.
LandOfFree
Method for electrically perforating dielectric webs does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for electrically perforating dielectric webs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for electrically perforating dielectric webs will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1604662