Windscreen wiper device

1. A windscreen wiper device comprising an elastic, elongated carrier element, as well as an elongated wiper blade of a flexible material, which can be place in abutment with a windscreen to be wiped, which wiper blade includes opposing longitudinal grooves on its longitudinal sides, in which grooves spaced-apart longitudinal strips of the carrier element are disposed, wherein neighbouring ends of said longitudinal strips are interconnected by a respective connecting piece, which windscreen wiper device comprises a connecting device for an oscillating wiper arm, wherein said oscillating arm is pivotally connected to said connecting device about a pivot axis near one end, wherein said connecting device comprises engaging members engaging around longitudinal vertical sides of said longitudinal strips that face away from each other, so that said longitudinal strips are mounted in grooves formed by said engaging members, wherein each of said longitudinal strips has at least one horizontal side with a skin of a polymer material, and wherein said engaging members are soldered to said skin of said polymer material on said at least one longitudinal horizontal side of each longitudinal strip, using a polymer material as a soldering material.

2. Windscreen wiper device according to claim 1 , wherein said connecting device is soldered to said longitudinal strips through an ultrasonic soldering operation.

3. Windscreen wiper device according to claim 1 , wherein said engaging members are soldered to two longitudinal horizontal sides of each longitudinal strip that face away from each other.

4. Windscreen wiper device according to claim 1 , wherein said connecting device and said engaging members are made in one piece.

5. Windscreen wiper according to claim 1 , wherein said polymer material comprises a polymer resin.

6. A windscreen wiper device, comprising:

an elongated wiper element having opposing longitudinal grooves;

a pair of elongated metal strips disposed in said longitudinal grooves, said strips being pre-formed into a curved shape to impart a curved shape to said wiper element and being elastically flexible to conform during use of the wiper element to the shape of a windscreen to be wiped;

said pair of elongated metal strips having at least one horizontal side with a skin of meltable polymer material applied thereto;

a connecting device for connection to an oscillating windscreen wiper arm, said connecting device being fabricated of a meltable polymer material and having engaging members in engagement with said at least one horizontal side of said metal strips; and

wherein said engaging members are soldered to said skin of meltable polymer material on said at least one horizontal side of each longitudinal strip, using said polymer material as a soldering material.

7. A method of manufacturing a windscreen wiper device, comprising:

preparing an elongated wiper element having a wiping lip and a pair of opposing longitudinal grooves;

installing a pair of elongated, curved, elastic metal strips having longitudinal horizontal sides that are coated with a skin of meltable polymer material in the grooves of the wiper element to impart corresponding curvature to the wiper element;

preparing a connecting device fabricated of meltable polymer material and applying a meltable polymer solder material to at least one of the connecting device or the coated metal strips;

applying a soldering material onto at least one of the longitudinal horizontal sides of the strip;

mounting the connecting device on the coated metal strips after the soldering material is applied onto the at least one longitudinal horizontal side of the strip; and

ultrasonically heating the polymers of the solder, the connecting device and the coating on the strips to melt and fuse the polymers to establish an ultrasonic solder joint between the connecting device and the strips.