| 摘要 |
A method for making fin-free multi-bored rubber sheets by pressing a starting raw-rubber sheet against a die having a plurality of die projections. A carrier sheet, which can integrally adhere to those portions of the starting rubber sheet which are strongly pressed thereto by the free ends of the die projections, is overlaid on the starting raw-rubber sheet prior to the pressing. Thereby, upon completion of the pressing operation, the carrier sheet is separated from the starting rubber sheet, for ensuring the complete elimination of the fins at the bored portions of the rubber sheet. |
