Substantially uncurved and unwaved plywood produced by using ven

Details Substantially uncurved and unwaved plywood produced by using ven Substantially uncurved and unwaved plywood produced by using ven

1992-04-17

1993-10-26

Bray, W. Donald

Woodworking

Process

Mechanical cutting or shaping

144 3R, 144193E, 144215, 144346, 144367, 144368, 156 83, 156264, 428105, 428106, B27C 100

Patent

active

052557260

ABSTRACT:
A substantially uncurved and unwaved plywood includes at least one pair of veneers located symmetrically with respect to a middle of a thickness of the plywood and having unstraight grains which coincide with each other.
A method for producing a substantially uncurved and unwaved plywood comprises locating at least one pair of veneers with identical unstraight grains in a pair of positions symmetrical with respect to a middle of a thickness of a plywood to be produced, in such a manner than the grains of the veneers coincide with each other.
A simple method for continuously preparing pairs of veneers with identical unstraight grains comprises (i) peeling from a cylindrical log with unstraight fibers a continuous sheet of twice a thickness of each one of a pair of veneers to be prepared, (ii) cutting the sheet into a predetermined length to provide a thick veneer, and (iii) slicing the thick veneer at a middle of a thickness thereof to prepare a pair of veneers with equal thicknesses and with identical unstraight grains. Another simple method for continuously preparing pairs of veneers with identical unstraight grains includes slicing the continuous sheet before cutting into the predetermined length.
Other methods for continuously preparing pairs of veneers with identical unstraight grains are also disclosed.

REFERENCES:
patent: 1662314 (1928-03-01), Hyland
patent: 3970497 (1976-07-01), Glover
patent: 4776376 (1988-10-01), Jaeger
patent: 4934228 (1990-06-01), Bolton et al.
patent: 4989651 (1991-02-01), Snellgrove
SU 1207-766-A; Abstract.

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