| 摘要 |
658,386. Storage battery separators. BOSCH GES., R. Sept. 23, 1949, No. 24429. Convention date, Oct. 1, 1948. [Class 53] A separator is made from a sheet of synthetic resin or similar material which is provided with a series of slits and then heated and stretched to convert the slits into openings. The separator may be corrugated after or simultaneously with the stretching operation. Fig. 2 shows an apparatus for slitting, warming, stretching and corrugating a band of material 1 which is drawn from a roll 2 between roller tools 4 which form rows of slits in the band which is then passed between electric heaters 7. The heated band is then passed between ribbed rollers 8 which have a greater peripheral speed than the rollers 4 so that the band is stretched to open the slits and is corrugated at the same time. |
