Patent ID: 7210228

Claim:
A method of manufacturing a flat wiper blade assembly, comprising: forming a wiper element; extruding a metallic frame having a generally closed upper channel and an open bottom channel with a slot transversing a wall spanning the length of the bottom channel to receive the wiper element; slidably inserting the wiper element into the bottom channel of the frame so that the wiper element depends from the bottom channel and through the slot to make wiping contact with a surface to be wiped; installing a pair of end plugs into an opening at each end of the upper channel and across at least a portion of the bottom channel to releasably maintain the wiper element within the bottom channel; providing a hose and a nozzle; forming an opening in a sidewall of the upper channel; connecting the hose to the upper channel so as to be operative to provide for fluid communication between the upper channel and a source of wiper fluid under pressure provided through the hose; and inserting the nozzle into the opening in the upper channel so that wiper fluid can be dispensed through the nozzle and onto a surface to be wiped.