| 摘要 |
A method of and apparatus for treating foam board to permit it to be accordion folded involves moving an elongate foam board along a longitudinal pathway into a slitting machine, stopping the travel of the board and clamping it in stationary position, and then laterally simultaneously moving pairs of longitudinally spaced upper and lower slitters, which produce alternate slits less than through the thickness of the board to leave a foldable thickness, across the board. The board is then released to be accordion folded.
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