专利名称：Method of making perforated adhesive
tapes
发明人：SCHAAR CHARLES H.申请号：US23083162申请日：19621016公开号：US3183116A公开日：19650511
摘要：951,468. Adhesive surgical dressings. KENDALL CO. March 6, 1961 [March 14,1960] No. 8155/61. Addition to 851,473. Heading A5R. [Also in Division B2] A surgicalbandage which may take the form of a finger bandage (Fig. 4), or a spot bandage (Fig. 5),comprises an absorbent pad or compress 16 stuck to the adhesive surface of an adhesivetape 10 which comprises a backing film 11 of flexible thermoplastic organic polymericmaterial having a multiplicity of small perforations 12, each surrounded by a raised bead13 formed by melting and perforating the material by subjecting the material to theaction of hot fluid while simultaneously cooling other areas to prevent those other areasfrom melting, and a coating 14 of pressure-sensitive adhesive on one surface, theperforations being substantially free of adhesive and providing ventilation in the areacovered by the pad or compress and in the areas beyond. The film which may be ofpolyethylene terephthalate, vinylidene chloride-vinyl chloride copolymer or crystallinepolyethylene, may have at least 200 perforations per square inch uniformly distributedthroughout its area, the diameter of the perforations being between 10 and 40 mils. Theadhesive may comprise natural rubber, rosin, rosin ester, hydrogenated rosin and a fillersuch as zinc oxide.
申请人：THE KENDALL COMPANY
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