Patent ID: 6532638
Filing Date: 2003-03-18
Classification: B21D,B60S,Y10T

Abstract:
A method of producing flat-blade windshield wipers for motor vehicles with curved flat blades, the method comprising the steps of;feeding a spring band formed of a plurality of flat blades arranged one next to another in a direction of elongation of said spring band through feed rolls and guide rolls; bending said spring band in one transversal direction between three support sites spaced from each other in a direction of feeding of said spring band and resting successively in an alternating manner on one of two sides of said spring band; re-bending said spring band in another transversal direction opposite to said one transversal direction in a fourth support site arranged subsequently to said three support sites by a degree of re-bending lower than a bending degree in said bending step; adjusting a degree of bending during a bending process to realize different bending radii within one flat blade; separating each individual flat blade of a re-bent spring band from a remaining spring band; combining each individual flat blade with a rubber-elastic wiping bar; and mounting to said re-bent flat blade combined with said wiping bar a connection device for a wiper arm.