06855901 is referenced by 10 patents and cites 25 patents.

An apparatus and process that makes use of spectral information in the mid-infrared range (400 to 4500 cm−1) to identify recyclable materials containing barrier polymers from recyclable materials not containing barrier polymers, which includes projecting light containing the mid-infrared (MIR) range onto materials to be analyzed, dispersing the MIR light that has reflected from or passed through the materials or both into various wavelengths, measuring the intensity of the MIR light at least one wavelength responsive to differences between the materials, measuring the intensity of the MIR light at least one wavelength not responsive to differences between the materials in order to provide a reference, and comparing the measurements in order to identify barrier materials from non-barrier materials.

Title
Process and apparatus for spectroscopic identification and sorting of barrier materials
Application Number
10/126252
Publication Number
6855901 (B1)
Application Date
April 19, 2002
Publication Date
February 15, 2005
Inventor
John T Rich
Lebanon
TN, US
Edward J Sommer Jr
Nashville
TN, US
Mary A Leugers
Midland
MI, US
Terry W Glass
Richwood
TX, US
Muhammad A Shafi
Lake Jackson
TX, US
Robert D Guenard
Lake Jackson
TX, US
Agent
Wyatt Tarrant & Combs
Assignee
National Recovery Technologies
TN, US
IPC
B07C 005/00
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