초록 ▼

A composite material and a method for producing a composite material of a highly, multidirectionally elastic nature which includes ultrasonically welding an upper layer to a lower layer along substantially parallel, spaced apart weld seams, feeding elongated strands of an intermediate layer between

A composite material and a method for producing a composite material of a highly, multidirectionally elastic nature which includes ultrasonically welding an upper layer to a lower layer along substantially parallel, spaced apart weld seams, feeding elongated strands of an intermediate layer between the upper and lower layers and between the weld seams during the welding operation, and applying a tensile stress to at least one of the upper, lower and intermediate layers during the welding operation with such tensile stress being different from the tensile stress on at least another of the upper, lower and intermediate layers. Apparatus for performing the above method includes a plurality of spaced apart, disc-like anvil plates having circumferential teeth and fixedly secured to a common shaft for rotation therewith, an oscillating member disposed above the anvil plates for ultrasonically welding an upper layer to a lower layer along substantially parallel, spaced apart weld seams determined by the spacing of the anvil plates, feed tubes for feeding elongated strands of material of an intermediate layer between the upper and lower layers and between the weld seams during the welding operation, and a pair of rollers associated with each of the upper, lower and intermediate layers for supplying each of the respective layers to the anvil plates and for applying a variable tensile stress to the respective layers supplied to the anvil plates.

대표청구항 ▼

An article of manufacture comprising: a lower layer; an upper layer ultrasonically welded to said lower layer along substantially parallel, spaced apart weld seams; and an intermediate layer disposed between said upper layer and said lower layer, wherein at least one of said upper, lower and interme

An article of manufacture comprising: a lower layer; an upper layer ultrasonically welded to said lower layer along substantially parallel, spaced apart weld seams; and an intermediate layer disposed between said upper layer and said lower layer, wherein at least one of said upper, lower and intermediate layers is applied with a tensile stress which is different from the tensile stress on at least another of said upper, lower and intermediate layers when said upper layer is ultrasonically welded to said lower layer. A method of producing a composite material of the type having an upper layer, a lower layer and an intermediate layer disposed between said upper layer and said lower layer, comprising the steps of: ultrasonically welding said upper layer to said lower layer along substantially parallel, spaced apart weld seams; feeding said intermediate layer between said upper layer and said lower layer during said step of ultrasonically welding; and applying a tensile stress to at least one of said upper, lower and intermediate layers during said step of ultrasonically welding which is different from the tensile stress on at least another of said upper, lower and intermediate layers. Apparatus for producing a composite material of the type having an upper layer, a lower layer and an intermediate layer disposed between said upper layer and said lower layer, comprising: welding means for ultrasonically welding said upper layer to said lower layer along substantially parallel, spaced apart weld seams; feeding means for feeding said intermediate layer to said welding means between said upper layer and said lower layer; and tension means for applying a tensile stress to at least one of said upper, lower and intermediate layers supplied to said welding means which is different from the tensile stress on at least another of said upper, lower and intermediate layers.