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Plastics identification

  • US 5,786,892 A
  • Filed: 09/30/1996
  • Issued: 07/28/1998
  • Est. Priority Date: 04/07/1994
  • Status: Expired due to Fees
First Claim
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1. An apparatus for identifying different plastic materials comprising;

  • a spectrometer (10),a protective casing (12,

         112), surrounding the spectrometer (10) and defining a sensing window (58,

         158) formed in one face of the casing (12,

         112);

    an interface device (14) associated with the sensing window (58,

         158), of the interface device (14) having a front wall (16,

         116) defining a sample aperture (18,

         118) against which a sample (24) can be placed so that a surface of the sample (24) is exposed through the aperture (18,

         118);

    means (48, 148,

         480) for cleaning a sample surface (24) placed against the front wall (16,

         116);

    means (52,

         152) for extracting debris resulting from the sample cleaning; and

    means (28, 30, 128,

         130) for guiding the front wall (16,

         116) towards the sensing window (58,

         158) to enable the spectrometer (10) to take a reading from the sample surface (24).

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