Wiper blade rubber

Details Wiper blade rubber Wiper blade rubber

1983-03-31

1990-04-03

Thomas, Alexander S.

Brushing, scrubbing, and general cleaning

Attachments

Optical-member-attachable cleaner

428336, 428408, A47L 100

Patent

active

049128035

ABSTRACT:
A wiper blade rubber provided with a surface layer containing more than 50% by volume of lubricative fine powder at least on the surface of a sliding portion thereof including a lip. The surface layer is integrally press-formed with the substrate of wiper blade rubber in one body so as to be vulcanized. The wiper blade rubber having such a surface layer is produced by a method according to the present invention which is characterized in that a starting article as the substrate of wiper blade rubber and a cavity provided in a separate mold used for this purpose has such a dimensional relationship therebetween that the thickness of the starting article at the center in the transverse section thereof is 0.9 to 1.0 times the thickness of the corresponding central portion of the cavity, where the lip of wiper blade rubber is defined. And the starting article has such a shape in the transverse section thereof that the central thin portion thereof is connected to the respective thick end portions thereof at an angle ranging from 20.degree. to 45.degree., which is defined by a line elongated along the central thin portion thereof and another line elongated along the connecting portion thereof. The wiper blade rubber according to the present invention has a small sliding resistance as well as excellent durability.

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