Woodworking – Process – Securing
Patent
1990-03-14
1992-05-05
Bray, W. Donald
Woodworking
Process
Securing
52586, 156254, 156265, 156300, 144346, B27G 1100
Patent
active
051098989
ABSTRACT:
Multi-ply floor panel boards are cut from a sheet composed of individual, glued plies. The plies of two such sheets are now placed together underside to underside and glued together. Then double board blanks in the size of the panel boards to be manufactured are cut from the composite sheet formed in this way. After hardening of the glue, these double board blanks are halved along their middle plane, so that two panel boards completely free of warping are formed. The plies adjoining the middle plane of the composite sheet preferably form a continuous middle ply. This can be provided on both sides with incisions reaching to the middle plane, so that, after halving of the double board blanks, each panel board has a bottom ply with continuous parting cuts. The grooves and tongues that are sometimes necessary along the edges of the panel boards are already made in the edges of the double board blanks in one working cycle for each two panel boards.
REFERENCES:
patent: 1102036 (1914-06-01), Ganter
patent: 1594889 (1926-08-01), Loetschere
patent: 1840974 (1932-01-01), Rockwell
patent: 3878017 (1975-04-01), Etzold
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