Cords

The patentee, Wm. Cords, instituted this suit against the defendants, Coil Manufacturing Company and C. J. Doran, for' infringement of patent No. 1,919,584, for methods and apparatus for conveniently making packing rings by hand from straight bands of metal, applied for February 4, 1931, and issued July 25, 1933. The claims of the patent alleged to be infringed by defendants’ apparatus are as follows:

Claims 1 and 3 describe an apparatus for bending a metal blank edgewise into the form of an annular ring. Claim 4 describes an apparatus for bending a strip *361 of thin metal into the form of a light resilient piston ring, and imparting a uniformly dished shape thereto. Claim 5 describes a means in an apparatus for bending a strip of metal edgewise, and adjusting said means to cause a predetermined lateral distortion thereof. Claim 8 describes a rotatable memhei adjustable to form a pass therein, and vary the size of said pass for use in combination with an apparatus for reshaping an elongated piece of material. Claims 10, 11, and 12 describe methods of making a dished piston ring from a band of metal of width greatly in excess of its thickness, by bending said band into annular…