Method for producing separator and device for producing separator

Abstract

A method for producing a separator in accordance with an embodiment of the present invention includes: a removing step of removing both end parts of a separator original sheet in a width direction of the separator original sheet, the separator original sheet being transferred; and a coating step of coating, with coating for forming a heat-resistant layer, the separator original sheet whose both end parts have been removed in the removing step.

1 .- 12 . (canceled) 
     
     
         13 . A method for producing a separator, comprising a removing step of causing a removing section to remove both end parts of a base film, which is transferred by being given a tension, in a width direction of the base film, the width direction being a direction which is (i) substantially perpendicular to a transferring direction of the base film and (ii) substantially parallel to a surface of the base film, the removing section including:
 a first cutting section for cutting off one of the both end parts of the base film;   a second cutting section for cutting off the other one of the both end parts of the base film; and   a fixing shaft that extends in the width direction of the base film and fixes the first cutting section and the second cutting section.   
     
     
         14 . The method for producing a separator as set forth in  claim 13 , wherein each of the first cutting section and the second cutting section is fixable at a given position on the fixing shaft. 
     
     
         15 . The method for producing a separator as set forth in  claim 13 , wherein each of the first cutting section and the second cutting section includes a razor blade. 
     
     
         16 . The method for producing a separator as set forth in  claim 15 , wherein in a case where a distance between a bottom surface of the base film and a lower end part of a blade edge of the razor blade of the first cutting section in the removing step is defined as a first depth, the first depth has a value that is not smaller than a quarter of a distance between (i) a first end side of the base film on a side of the one of the both end parts of the base film and (ii) a removal position at which the razor blade of the first cutting section is brought into contact with the base film. 
     
     
         17 . The method for producing a separator as set forth in  claim 15 , wherein in a case where a distance between a bottom surface of the base film and a lower end part of a blade edge of the razor blade of the second cutting section in the removing step is defined as a second depth, the second depth has a value that is not smaller than a quarter of a distance between (i) a second end side of the base film on a side of the other one of the both end parts of the base film and (ii) a removal position at which the razor blade of the second cutting section is brought into contact with the base film. 
     
     
         18 . A device for producing a separator, comprising a removing section for removing both end parts of a base film, which is transferred by being given a tension, in a width direction of the base film, the width direction being a direction which is (i) substantially perpendicular to a transferring direction of the base film and (ii) substantially parallel to a surface of the base film,
 the removing section including:   a first cutting section for cutting off one of the both end parts of the base film;   a second cutting section for cutting off the other one of the both end parts of the base film; and   a fixing shaft that extends in the width direction of the base film and fixes the first cutting section and the second cutting section.