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AssigneeMedtronic Xomed, Inc.
InventorsRonald J. Cercone, Gerald D. Ingram, Leon C. Nunier, Scott J. Quaratella
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An industrial sponge device and a method of manufacturing the same. The sponge is made from a polyvinyl acetal material with a process in which the pores are formed by gas to provide an open pore structure having no fibrils. Additionally, the sponge is purified by an extracting process which includes alternating exposure of the partially cross-linked sponge to solutions of high pH and low pH. The sponge is sterilized by electron beam radiation to destroy micro organisms that can cause contamination of the final product. The resulting sponge material is formed into an industrial sponge having a cylindrical body and a plurality of projections extending from the body. The projections are tapered truncated cones having a cross-sectional radius that decreases with distance from the body. The extracting process permits residual amounts of calcium, zinc, and other elements to be 2 ppm or less. preferably 1 ppm or less.
An industrial sponge roller device comprising:
A method for extracting residue from an industrial sponge material comprising, in order, the steps of:
An industrial sponge made by subjecting sponge material to an extracting process for extracting residue, said extracting process comprising, in order, the steps of:
An industrial sponge comprising:
An industrial sponge comprising:
An industrial sponge comprising:
An industrial sponge comprising:
An industrial sponge device comprising a polyvinyl acetal material having a residual amount of zinc that is 2 ppm or less.
A method of cleaning a silicon material comprising:
Dependencies are inferred from the claim text.