Electromechanical film and procedure for manufacturing same
OwnerKari Kirjavaineninventor
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Abstract
The present invention concerns a dielectric film for converting electromagnetic or electrostatic energy into mechanical work, and a procedure for manufacturing the film. The film of the invention consists of a homogeneous film layer foamed to be of full-cell type and which has been oriented by stretching it in two directions and coated at least in part on one side or on both sides with an electrically conductive layer. The film is manufactured by extruding the plastic which has been made to be foamable, into tubular shape, performing intermediate cooling of the tube and reheating it, expanding the heated tube in two directions, metallizing the outer surfaces and cutting the tube open to become a film.
Claims13
A dielectric film for converting the energy of an electric field and of a magnetic field into mechanical energy, or for converting mechanical energy into electric energy, said dielectric film comprising
- a foamed homogeneous film layer of a full-cell type comprising flat disk-like bubbles;
- an electrically conductive surface layer coating at least in part one side or both sides of said homogeneous film layer.
A procedure for manufacturing a dielectric film for converting the energy of an electric field and of a magnetic field into mechanical energy, or for converting mechanical energy into electric energy, said procedure comprising the steps of:
- extruding a foamable plastic in a plastic processing machine to form a tube, gas blisters being formed due to the foaming at desired density throughout the formed tube;
- expanding the heated tube in two directions to obtain a desired wall thickness and orientation;
- placing a metallic material over the outer surfaces of said tube;
- cutting open said tube to form a film.
Dependencies are inferred from the claim text.