Method and apparatus for producing microporous metal foil
AssigneeSeiji KAGAWA
InventorsSeiji KAGAWA, Yoichiro KAGAWA
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Abstract
A method and an apparatus for producing a microporous metal foil comprising (a) passing a metal foil through a gap between a pattern roll having large numbers of high-hardness, fine particles on the surface and a hard roll while pressing, to provide the metal foil with large numbers of fine penetrating pores, with a thin hard plastic film interposed between the metal foil and the pattern roll, and a thick soft plastic film interposed between the metal foil and the hard roll; and (b) adjusting tension applied to each of the metal foil, the hard plastic film and the soft plastic film to such an equal level that the metal foil is not broken during forming the fine penetrating pores.
Claims11
A method for producing a microporous metal foil comprising
- passing a metal foil through a gap between a pattern roll having large numbers of high-hardness, fine particles on the surface and a hard roll while pressing, to provide said metal foil with large numbers of fine penetrating pores, with a thin hard plastic film interposed between said metal foil and said pattern roll, and a soft plastic film thicker than said hard plastic film interposed between said metal foil and said hard roll;
- and
- adjusting tension applied to each of said metal foil, said hard plastic film and said soft plastic film to such an equal level that said metal foil is not broken during forming said fine penetrating pores.
An apparatus for producing a microporous metal foil comprising
- a pore-forming apparatus comprising a pattern roll having large numbers of high-hardness, fine particles on the surface, and a hard roll opposing said pattern roll via a gap;
- a first guide means for passing a metal foil through the gap between said pattern roll and said hard roll;
- a second guide means for passing a thin hard plastic film through the gap between said pattern roll and said metal foil;
- and
- a third guide means for passing a thicker soft plastic film than said hard plastic film through the gap between said hard roll and said metal foil;
- each of said first to third guide means being provided with a means for adjusting tension applied to each of said metal foil, said hard plastic film and said soft plastic film, to such an equal level that said metal foil is not broken during forming said fine penetrating pores;
- whereby said hard plastic film, said metal foil and said soft plastic film are overlapped in this order from the side of said pattern roll, and pass through the gap between said pattern roll and said hard roll, to form a microporous metal foil having fine penetrating pores.
Dependencies are inferred from the claim text.