Methods for monitoring resin-loading of wood materials and...

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

06846447

ABSTRACT:
Process for calibration of spectroscopic instrumentation for non-invasive monitoring of resin-loading of furnish-type wood materials, such as particles or fibers for particleboard or medium density fiberboard, respectively. Selection of ranges of wavelengths within a 350 nm to 2500 nm region by providing selection of spectrometers and sensors for wavelength ranges of 350-1000 nm, 1000 to 1800 nm, 1000 to 2500 nm, and 400 to 2200 nm, for use by engineered-wood manufacturing installations. Resin-loaded wood material is exposed to selected VIS/NIR energy and monitored as it moves on-line in relation to calibrated spectroscopic instrumentation; a sensor collects non-absorbed radiation energy reflected by the wood materials. Measurements are processed, in relation to pre-established calibration data, to determine whether the resin-loading is within manufacturing objectives; monitoring and feedback are used to maintain desired specifications.

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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