NIR spectroscopic monitoring of resin-loading during...

Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Measuring – testing – or inspecting

Reexamination Certificate

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C264S410000, C264S488000, C264S492000, C264S040100

Reexamination Certificate

active

06846446

ABSTRACT:
Calibrating near infra red (NIR) spectroscopic instrumentation for quantitative measurement of resin-loading of prepared wood materials, as moving in an assembly-forming line, for subsequent pressing under heat and pressure for manufacture of engineered-composite wood product. Feedback of measured data of resin-loading, during in-line assembly operations, enables maintaining consistent resin-loading and optimizes resin usage. Calibration of NIR spectroscopic instrumentation can be carried out on equipment simulating in-line movement of pre-established reference-source test-samples; or, can be carried out during on-line movement of wood-material test samples. The developed calibration method removes absorptive effects at wavelengths for constituents other than resin, such as the moisture content of the wood-materials and of the resin, while maintaining accurate and prompt NIR spectroscopic measurements of resin-loading in a continuous assembly line.

REFERENCES:
patent: 3196072 (1965-07-01), Wirtz
patent: 4508772 (1985-04-01), Churchland et al.
patent: 5104485 (1992-04-01), Weyer
patent: 5619038 (1997-04-01), Parigi et al.
patent: 6461743 (2002-10-01), Tanzer et al.

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