Continental Can Co. v. Cameron Can Machinery Co.

76 F.2d 173, 25 U.S.P.Q. (BNA) 50, 1935 U.S. App. LEXIS 2494
CourtCourt of Appeals for the Seventh Circuit
DecidedMarch 27, 1935
DocketNo. 5270
StatusPublished
Cited by5 cases

This text of 76 F.2d 173 (Continental Can Co. v. Cameron Can Machinery Co.) is published on Counsel Stack Legal Research, covering Court of Appeals for the Seventh Circuit primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Continental Can Co. v. Cameron Can Machinery Co., 76 F.2d 173, 25 U.S.P.Q. (BNA) 50, 1935 U.S. App. LEXIS 2494 (7th Cir. 1935).

Opinion

SPARKS, Circuit Judge.

This was an action for infringement of claims 2, 8, 9, 12, 15, 16, and 171 of United [174]*174States Patent No. 1,772,820, issued to Troy-er August 12, 1930, on an application filed February 23, 1926, and subsequently assigned to appellant. The court decreed each claim invalid for lack of invention, and dismissed the bill for want of equity. From that ruling this appeal is prosecuted.

The invention is one of combination and relates to a means and process for the fabrication of metal cans. As explanatory’of its object, appellant stated that in the manufacture of metal cans it was the usual practice to form the body blanks cylindrically, after they had been properly flanged and notched, by means of a pair of wing clamps which were actuated against opposite ends of the blanks to bend them about a cylindrical horn and to hold them while the ends were seamed together. As a rule, the blanks did not bend with the same degree of ‘curvature throughout their length, but bent more abruptly at some places than at others, depending on the stiffness of the metal used, thus producing flat or irregular surfaces on the finished cans. Appellant claimed to have discovered that if the metal blank which is to be formed into the can is properly treated so as to break the grain of the metal before bending it about the cylindrical horn, the blanks will then form about the horn in true cylindrical shape. Hence, the object of the patent was said to be to provide both a process and means (1) for breaking the grain of the metal blank by a progressive curving of it from one side edge to the other, (2) for then returning the blank to a substantially fiat condition for the shaping and bending of the edge portions so that they might be interlocked, and (3) for then carrying the blank to the cylindrical horn where, it was bent into a uniform cylindrical body, and the interlocking edges were locked and the seam was compressed or flattened by a bumping operation.

The elements participating in this combination were all old in the art. Body making machines which included the mechanisms for notching the edges of the blanks, forming hooks thereon, bending the blanks into cylindrical form about the horn, compressing the interlocked edges to form the seam, and feeding the blanks in flat condition past the various operating mechanisms were all disclosed in Troyer’s prior patent, No. 1,543,460, issued June 23, 1925.

Likewise, mechanisms for breaking the grain of metal blanks by curving the blanks progressively from one edge to the other were old in the can making art. Leavitt, No. 382,537; Schaake, No. 563,069; Warme, No. 1,094,179; and Peters, No. 1,-625,091. Also mechanisms for breaking the grain by flexing or bending the metal blanks back and forth in opposite directions beyond its elastic limit were old in the art. Marshall, No. 175,365; Harvey, No. 202,027; and Kelley; No. 1,649,704. Mechanisms for breaking the grain of metal blanks by bending them back and forth in opposite directions, in combination with automatic machines for operating upon grain broken metal, other than metal blanks for cans, was likewise old in the art. Shuster, No. 973,-571; Osswald, No. 1,107,831; and Locke, No. 1,564,696.

If there be novelty in the patent in suit, it must be by virtue of combining one of the well-known devices for breaking the grain of metals with Troyer’s prior patent, or its equivalent, and before the patent can be sustained, the combination must have produced a new result or an old result in a. more facile or efficient or economical manner.

The three major mechanisms which Troyer combined in creating the body maker of the patent in suit are: (1) The flexing mechanism which breaks the grain; (2) the edge preparing mechanism which forms, the hooks; and (3) the body forming mechanism which forms the body in true cylindrical shape and interlocks and compresses the hooks. The flexing mechanism consists-of three horizontal parallel cylinders, a. guide block, and a straightening plate, although the latter element is not mentioned: [175]*175as a part of the grain breaking mechanism in claims 2, 8, 9, 12, and 15. The cylinders are positioned vertically one above another, and we shall refer to them as the bottom, center, and top cylinders. The metal plate is fed from the left between the bottom and center cylinders; it thereupon engages the guiding block on the right of the cylinders which returns the .blank between the center and top cylinder; then it engages what the specifications refer to as the straightening plate which is located to the left and at the top of the center cylinder. This plate merely prevents the blank from further following the center cylinder and directs the plate further to the left in a horizontal plane between the upper and lower guides, which by force hold the blank fiat during the next process of slitting the edges and making the hooks. It is perhaps true that the “straightening plate” has a tendency to further break the grain by reversing the pressure, but not to any appreciable extent, and certainly not in such manner as to render the plate naturally fiat. The effect is fully set forth in the file wrapper: “Straightening out the metal in applicant’s process is only incidental. If it were practical to flange and notch the ends of the blanks as is required while in curved or cylindrical form, the straightening out process would be eliminated.” And again: “ * * * the metal is not only flexed to break the stiffness thereof, but it is broken in this curved form and proceeds through other stages, held flat by mechanism that permits the blank when released to spring into arcuate form around the horn for joining the ends together in body form.” These statements are further supported by the testimony of appellant’s witness, Fink.

After the edges are slit and the hooks are formed, the metal blank is mechanically carried to the cylindrical forming horn, the lengthwise center of the blank being positioned on the vertical center of the horn. In this position, it is said in the specifications, the blank is bent about the horn in true cylindrical form by the co-action of descending wing clamps pivotally connected immediately above the forming horn. The hooks being interlocked by the same action, the seam is then bumped and the operation is completed so far as the formation of the body of the can is concerned. The illustration accompanying the application for the patent, as well as the specifications, seem to indicate that the wing clamps, which are arcuate in form, bend the metal blank about the horn from a horizontal plane into a true cylinder. Figure 5 of the specifications shows the metal plate in a perfectly flat position as it is about to become engaged with the wing clamps, but we assume that the guide plates which held it in that position had not yet been removed, for the testimony introduced by appellant discloses that when the guide plates are removed the metal blank will spring into arcuate form about the horn. To what extent this will occur we are unable to state, but from the evidence to which we have referred, it must be considerable. It is certain, however, that the wing clamps do not bend the metal blank from a horizontal plane. It must be admitted, however, that the wing clamps exert some pressure in bending the metal blank about the horn to its completed condition, but in this respect appellee contends that the patent was anticipated by the prior art, and the trial court sustained the contention.

For the purpose of this discussion we shall consider patent No. 1,625,091, issfied April 19, 1927, to Peters on an application filed November 10, 1922.

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76 F.2d 173, 25 U.S.P.Q. (BNA) 50, 1935 U.S. App. LEXIS 2494, Counsel Stack Legal Research, https://law.counselstack.com/opinion/continental-can-co-v-cameron-can-machinery-co-ca7-1935.