METHOD FOR LAYER FABRICATION Russian patent published in 1995 - IPC

FIELD: layer materials. SUBSTANCE: method for layer fabrication includes placing strips of elastic foam plastics (e.g. polyurethane foam) in one plane as butt joint. Joining the strips on both sides by crosswise checkered strips. The crosswise strips will be cut along lines of joint to build checkered structure then. Step of cutting is equal to double width of joining strips. Then the strips are expanded in the direction being perpendicular to the direction of placing the strips to form cells between strips. Then it is subject to thermal stabilization. Crosswise strips are of material with rigidity exceeding one of material for lengthwise strips. Width of crosswise strips is less than or equal to one of lengthwise strips. Fusible thread is used to fix crosswise and lengthwise strips together. EFFECT: increased stability to deformation, security of the joint, improved properties of shock absorbing with keeping the same filtering ability and weight. 2 cl, 5 dwg, 1 tbl