spanset wipers

... velocity, and the rubbery material strips the surface free from grease and cleaning fluid residues. It is the edge that counts! Just a like a car window wiper, it is the edge that counts. Normally, the wipers are stamped from sheet goods. During stamping, the elastomer becomes distorted; the inner edge is therefore not dimensionally stable and is at an angle. Only part of the edge wipes emulsions from the surfaces depends on the profiles. This edge is rapidly worn down; the cleaning action is then unsatisfactory. Streakfree cleaning ...