Citations
- 97 F.2d 68
Full opinion text
MATHEWS, Circuit Judge.
This appeal is from a decree dismissing the bill of complaint in a suit by appellant against appellees for infringement of patent No. 1,919,584, issued to and owned by appellant.
The patent was applied for on February 4, 1931, and was issued on July 25, 1933. As stated in his application, appellant’s claimed invention “relates to methods and apparatus for conveniently making packing rings by hand from straight bands of metal.” The patent contains twelve claims. The bill does not state which claims were infringed, but the case was tried below and argued here upon the theory that claims 1, 3, 4, 5, 8, 10, 11 and 12 are the only ones involved. Claims 1, 3 and 4 read as follows :
“1. An apparatus for bending a thin relatively wide blank edgewise into an annular ring comprising a pair of feed rollers having toothed portions intermeshing and forming a groove designed to receive the blank, a roller bending die having a groove that may be disposed substantially in alinement with said roller groove, means to shift said die with respect to said rollers, and means to rotate said rollers to advance the blank and to cause it to be bent into annular form by said roller die during its advancement.”
“3. An apparatus for bending a substantially flat metal blank, having a width greatly in excess of its "thickness, edgewise into the form of an annular ring, said apparatus comprising a frame, a pair of rollers supported by said frame and having matched grooves cooperating to form a pass for receiving the blank with the lateral bounding planes of said pass normal to the roller axes and forming a space of a width greater than the thickness of the entering flat blank, bending means carried in predetermined position relative to said frame to impart a given final shape to the ring, and means for driving one of said rollers.
“4. An apparatus for bending a strip of relatively thin metal into the form of a light resilient piston ring, said apparatus comprising a set of cooperating feeding and shaping rollers, and means provided by said rollers for imparting a uniformly dished shape to the ring whereby the latter is given an overall thickness which is greater than the thickness of the metal which forms the said ring.”
Each of these claims describes an apparatus for bending a strip of metal into the form of a ring, meaning, we think, a single, individual ring. Appellees have not made, sold or used any such apparatus. Theirs is an apparatus for bending a strip of metal into a continuous spiral or coil of many convolutions. No such apparatus is described in any of the claims in suit.
Claim 5 reads: “In an apparatus for bending a strip of thin metal edgewise into the form of an annular ring, means forming a pass of greater width than the thickness of the metal for receiving the strip during its passage through the apparatus, and means for varying the width of said pass to cause more or less predetermined lateral distortion of the strip as said strip is being bent edgewise into annular form.” Here, also, the apparatus referred to is an apparatus for bending a strip of metal to form a single, individual ring. Appellees have not, in any such apparatus, made, sold or used the means described in claim 5, or any means whatever.
Claim 8 reads: “In subcombination, in an apparatus for reshaping an elongated piece of material, a rotatable member provided with an external set of teeth, and means disposed adjacent said teeth on said member for cooperation with one side of the set of teeth to form a pass for the piece of material, said means comprising a second set of teeth adjustable toward and from the first mentioned set to vary the size of said pass.” Appellees have not, in subcombination or otherwise, made, sold or used the means described in claim 8, or any equivalent means.
Claims 10, 11 and 12 read as follows:
“10. The method of making a dished piston ring from a band of metal of a width greatly in excess of its thickness which consists in bending the band of metal into annular form on lines transverse to the width of said band in a manner permitting the resultant compression of the metal adjacent the inside