Jmk International, Inc.

Michael L Hyer

Robert M Gibbon

A windshield wiper blade capable of inexpensive manufacture and having good wipe quality comprises approximately 100 parts by weight of a vulcanizable elastomer including at least one silicone polymer, and about 75 to 220 parts by weight of a siliceous filler dispersed in the elastomer. The siliceous filler preferably includes a substantial portion of particles having a relatively large diameter in the range of 5 to 100 microns in order to lower the coefficient of friction of the wiper blade with respect to automotive windshield glass.

Silicon rubber wiper blade with low coefficient of friction

A door gasket is shown for sealing between confronting surfaces. The gasket has a base for mounting to one confronting surface and a deforming section which protrudes outwardly for contacting the second surface. A wire extends through the base parallel to the axis of the gasket member. The deforming section includes a bottom wall, a vertical wall and a slanting wall which are integrally formed with the base and interconnected to define a right triangular exterior which produces improved sealing characteristics.

Door gasket with triangular shape

A method is shown for forming a wiper blade in which a continuous length of elastomer is extruded through a die having a die opening shaped to produce a pair of wiper blades joined in edge-to-edge relation. The elastomer is preformed to produce a weakened mid- section and then cured. The cured elastomer is then separated into two separate lengths of wiper blade by pulling the length of continuous elastomer along the weakened mid-section.

Method of forming an improved wiper blade

A method is shown for forming a wiper blade in which a continuous length of elastomer is extruded through a die having a die opening shaped to produce a pair of wiper blades joined in edge-to-edge relation. The elastomer is scored in the mid-section thereof to produce a score line and then cured. The scored and cured elastomer is then separated into two separate lengths of wiper blade by dividing the length of continuous elastomer along the score line.

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Weatherford, TX, United States of America

Michael L Hyer