Improvements in or relating to structures built up of plywood or other light-weight laminated material

摘要

550,401. Plywood &c. structural units. KREMER, H. July 3, 1941, No. 8430. [Class 145 (ii)] Lightweight structural units of plywood or other laminated multi-ply lightweight material for use in the manufacture of aeroplane bodies and wings, aircraft fuselage, spars &c. in aircraft body manufacture, rafts, seaplane floats &c. of the kind comprising a plurality of laminated tubes positioned in contact side by side and enclosed between sheets of similar laminated material secured by adhesive are constructed by first impregnating the parts with synthetic thermo-setting resin adhesive and then bonding the parts together by heating to set the resin. Examples are illustrated in the Figures. Specification 550,400 is referred to.