| 摘要 |
A sight glass assembly (10), especially adapted for use with continuous vulcanizing lines and the like wherein visual or optical access is required, constructed so as to provide self-sealing action during assembly and continuously self-cleaning action during use. A chamber (19) having an exit flow aperture (25) adjacent the viewing element (14) is subjected to a pressurized fluid or gas flow, which is discharged across the inner face of the viewing element. The pressurized fluid or gas is supplied externally through a passageway communicating (16) with the chamber.
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