Back to results
US 6,284,994 B1Granted
Electrode system for perforating synthetic plastic films
OwnerJames D. Crossinventor
Life of this patent
Estimating the term…
Abstract
An apparatus for perforating a film has one or more electrodes in electrode holders to lightly contact the film, a return electrode to support the film, and a voltage coupler to produce a discharge between the electrodes to perforate the film. A water jet sprayer is mounted on an electrode holder to provide a jet of water where the electrodes come into contact with the film.
Claims11
An apparatus for perforating a film, said apparatus comprising:
- (a) one or more electrodes, said electrodes being mounted in an electrode holder and said electrodes being positioned to lightly contact the film to be perforated;
- (a) a return electrode, said return electrode providing a support surface for the film;
- (b) a water jet sprayer being mounted in said electrode holder, and providing a jet of water in the location said electrodes contact the film;
- (c) said electrodes including an electrical coupler for coupling to a high voltage supply for energizing said electrodes to produce a discharge between said electrodes and said return electrodes to perforate said film.
1 more element
A method for perforating a synthetic film, said method comprising the steps of:
- (a) moving the film to be perforated through a gap defined by one or more rod electrodes and a roller electrode, said rod electrodes being in light contact with the film and the film being supported by said roller electrode;
- (b) applying high voltage pulses to said rod electrodes to cause a discharge between said rod electrodes and said roller electrode sufficient to perforate the film in an area where each of said rod electrodes contacts the film;
- (c) simultaneously applying a jet spray of water to the region of contact between each of said rod electrodes and the film.
Dependencies are inferred from the claim text.