| 摘要 |
The present invention provides a window operator for a casement window assembly that has secure and moveable linkage of pivoting parts of the operator. The linkage of the moveable operator parts is provided by a rivet having a rivet head with a plurality of fingers or petals extending radially outward of the center of the rivet, and wherein the petals are formed of thickened rivet material. The rivet head is formed in a conical configuration by the force of bending the rivet head with a conical shaped recess in the forming die, thus providing the method of forming the rivet connection in a smooth and progressive force of deforming the rivet head into a domed shape with the thickened petals extending radially outward and downward due to the conical die surface.
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