| 摘要 |
A noise reduction sleeve that fits over a printing sleeve while the printing sleeve is being slid onto or off of a respective cylindrical with the aid of compressed air exiting from holes in the outer surface of the cylinder. The noise reduction sleeve is an open-ended cylinder of felted fibrous material of a length equal to or slightly longer than the printing sleeve, with an axial wall. The noise reduction cylinder has a long section, slightly shorter than the printing sleeve, with an inside diameter slightly larger than the outside diameter of the printing sleeve. The remaining length of the noise reduction sleeve is crimped down to an inside diameter slightly less than the outside diameter of the printing sleeve.
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