Abstract: A process for producing an article in a flexible foamed polymer material, including treating a former with a coagulant; dipping the treated former in a latex foam mixture to form a layer of the mixture on the former that includes air cells; curing the layer to gel the foam mixture to a cross-linked open cell structure; and stripping the layer from the former; where the latex foam mixture includes a natural latex polymer as a primary polymer component, and a synthetic latex polymer as a secondary polymer component, which synthetic latex polymer is selected to enhance the evenness and/or fineness of said open cell structure.

Abstract: In a first aspect of the invention, there is provided a new method for edging a wood board. This method comprises the steps of constructing from the scanned images of a wood board, a virtual entity of the wood board; determining from the scanned images an optimized cut line along the virtual entity; displacing the forward edge of the virtual entity ahead of the leading edge of the wood board; displacing the rear edge of the virtual entity behind the trailing edge of the wood board and sawing the wood board along the optimized cut line on the virtual entity. In another feature, the saw blades inside the board edger are mounted in saw collars and are shifted along the arbor by an electric setworks mounted on the top of the saw box and a shifting arm extending vertically between the setworks and a respective saw collar.

Abstract: In a first aspect of the invention, there is provided a new method for edging a wood board. This method comprises the steps of constructing from the scanned images of a wood board, a virtual entity of the wood board; determining from the scanned images an optimized cut line along the virtual entity; displacing the forward edge of the virtual entity ahead of the leading edge of the wood board; displacing the rear edge of the virtual entity behind the trailing edge of the wood board and sawing the wood board along the optimized cut line on the virtual entity. In another feature, the saw blades inside the board edger are mounted in saw collars and are shifted along the arbor by an electric setworks mounted on the top of the saw box and a shifting arm extending vertically between the setworks and a respective saw collar.

Abstract: An improved method for the detection of tetrahydrocannabinol in human urine wherein the pigment melanin is precipitated out of the urine prior to analysis with a solution of nitroferricyanide so that the melanin does not interfere with the analysis. The value attributable to melanin can also be subtracted from the value obtained during the analysis of the urine. The precipitation of melanin prior to analysis or subtraction of the melanin value during analysis greatly reduces the occurrence of false positive test results for persons with dark skin.