Method of making overlaid plywood
AssigneeCrown Forest Industries Limited
InventorsJoseph W. Arena, Karle B. Gilson, David T. Malcolm, John A. R. Mellander
Life of this patent
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Abstract
Overlaid plywood is made by filling surface defects on a plywood panel with a thermosetting resin; overlaying the filled surface(s) with sheet(s) of overlay paper and then compressing the panel, while heating the panel. Gluelines in the plywood veneer and in the overlay paper(s) are cured during the hot pressing operation, which also flattens and hardens the resin-filled defects to form a smooth-surfaced overlaid plywood panel.
Claims43
A method of making overlaid plywood, comprising the steps of:
- (a) filling surface defects on a side of a plywood panel with a thermosetting resin;
- (b) overlaying said side with a sheet of overlay paper while said resin remains in the liquid state;
- and,
- (c) compressing said panel while heating said panel.
A method of making overlaid plywood, comprising the steps of:
- (a) forming a plywood panel with layers of glued veneer;
- (b) compressing said panel for a period of from about three minutes to about ten minutes;
- (c) filling surface defects on a side of said panel with a thermosetting resin;
- (d) overlaying said side with a sheet of overlay paper while said resin remains in the liquid state;
- and,
- (e) compressing said panel while heating said panel.
A method of making overlaid plywood, comprising the steps of:
- (a) forming a plywood panel with layers of glued veneer;
- (b) compressing said panel while heating said panel;
- (c) cooling said panel;
- (d) filling surface defects on a side of said panel with a thermosetting resin;
- (e) overlaying said side with a sheet of glue-impregnated overlay paper while said resin remains in the liquid state;
- and,
- (f) compressing said panel while heating said panel.
A method of making overlaid plywood, comprising the steps of:
- (a) applying thermosetting resin to a side of a plywood panel;
- (b) overlaying said side with a sheet of overlay paper while said resin remains in the liquid state;
- and,
- (c) compressing said panel while heating said panel.
Dependencies are inferred from the claim text.