Complete production line of wood I-joist manufacturing apparatus the method of manufacture, and the I-joist product, having lumber chords and a plywood web
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United States of America Patent
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Oct 26, 1982
Grant Date -
N/A
app pub date -
May 30, 1980
filing date -
May 30, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A complete production line of a wood I-joist manufacturing apparatus, the method of manufacture, and the I-joist products having lumber chords and a plywood web are available, wherein both the chord lumber and the web plywood are initially made into essentially endless lengths for subsequent cutting to lengths of the then pre-specified sizes of I-joists being prepared. Smaller lengths of chord lumber are finger jointed and glue cured together into longer lengths, which are then cut to specified overall lengths. Thereafter they are grooved to receive the opposing cut side edges of the web. Then these cut interfitting surfaces of both the chord lengths and the web first receive an application of glue before their subsequent convenient conveyed, converging, assembly. Once assembled, their overall glued joints enter a radio frequency heating glue curer which insures an excellent attachment between the chords and the web. The web is then cut to match the length of the chords. Thereafter glued attachment strength in resulting I-joist configuration can be tested at the end of the production line.
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