Method and apparatus for electric singe cutting
OwnerGerald H. Petersoninventor
Life of this patent
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Abstract
Thin material such as hair or paper is severed by a singeing process using the heated and opposed edges of two thin strips of metal with the edges closely spaced apart to form a slot and with the edges heated by high frequency electrical current or currents flowing along such strips and exhibiting therewith and therebetween skin and proximity effects, and by moving such strips relative to such material so that the material to be singed or severed enters such slot and is therein singed to effect severance by such singeing.
Claims5
The method of severing a thin material by the application of sufficient heat along a line on each of the opposite sides of said material in back-to-back relationship to sever such material along a line, that comprises inserting said material between two elongated, closely spaced strip electrical conductors, each having in opposition to the other a narrow edge, causing to travel along each of said conductors a high frequency current exhibiting in such travel the skin effect, and said edges of said conductors being sufficiently close enough together and the electron travel of each said currents being opposite one another at any instant such that the currents in said conductors exhibit the proximity effect whereby the current in each conductor is concentrated in the face of the edge of each conductor to heat the edges to the severing temperature for the material, and whereby said inserted material will be severed along such line by the heat generated along and between such opposed narrow edges.
A singer cutter comprising:
- a pair of elongated, closely spaced narrow metallic strips, means for supporting said strips in spaced relation so that parallel opposed edges of will form therebetween a narrow, elongated slot, a source of high frequency current, means connected to each strip for passing high frequency current along each said strip, means electrically connecting said strips and arranged so as to cause said current to flow in a direction in one said strip opposite to that in the other said strip at any instant, said currents being of a sufficient frequency to exhibit a skin effect and said edges being sufficiently close together to exhibit a proximity effect therebetween so as to concentrate said currents in the opposed edges of such slot to heat said edges to the severing temperature of a material to be cut between said edges.
Dependencies are inferred from the claim text.