Art of manufacturing reinforced plastic articles

Claim 1

IN A METHOD OF APPLYING A REINFORCED FABRIC COATING TO AN ARTICLE WHICH IS TO HAVE A CURVED SURFACE OVER A FILLED-IN SPACE WHICH CURVED SURFACE IS TO MATCH A CURVED PORTION OF A MOLD CAVITY, THE STEPS OF LAYING REINFORCED FABRIC OVER SAID CURVED PORTION OF THE MOLD CAVITY TO COVER SAID CURVED PORTION, LAYING INHERENTLY RESILIENT CURED FOAM MATERIAL AGAINST SAID REINFORCING FABRIC TO COVER THE LATTER, PREPARING WOODEN FILLER BLOCKS HAVING AN EXTERNAL SHAPE TO SUBSTANTIALLY CONFORM TO THE CURVATURE OF THE MOLD CAVITY, FILLING THE SPACE BETWEEN THE ARTICLE AND SAID RESILIENT FOAM MATERIAL WITH SAID BLOCKS, PARTIALLY COMPRESSING THE RESILIENT FOAM MATERIAL BETWEEN SAID FILLER BLOCKS AND THE FABRIC-COVERED CURVED PORTIONS OF THE MOLD CAVITY SO THAT THE TENDENCY OF THE RESILIENT FOAM MATERIAL TO RETURN TO ORIGINAL CONDITION EXERTS A PRESSURE WHICH MAINTAINS THE FABRIC IN FIRM CONTACT WITH THE CURVED PORTION OF THE MOLD CAVITY, AND CAUSING A HARDENABLE LIQUID PLASTIC MATERIAL TO FLOW INTO THE MOLD CAVITY BETWEEN THE FILLER BLOCKS AND FOAM MATERIAL AND BETWEEN THE LATTER AND THE MOLD WITH SUFFICEINT PRESSURE TO IMPREGNATE SAID FABRIC AND THEREBY FORM A FABRIC-REINFORCED EXTERNAL COATING, THE PRESSURE EXERTED BY THE COMPRESSED FOAM MATERIAL BEING AT LEAST AS GREAT AS THE PRESSURE EXERTED BY THE LIQUID PLASTIC MATERIAL TO PREVENT CONCENTRATIONS OF THE LATTER BETWEEN THE OUTER SIDE OF THE SKIN AND THE MOLD, AND SAID FILLER BLOCKS BEING RELATIVELY RIGID AS COMPARED WITH THE INHERENTLY RESILIENT FOAM MATERIAL.