The drawings accompanying the specification, which formed part of the reissued patent, were the same as the original, except one described as Figure 4, which was added, but was un

Statement of Facts.

important. The specification of the reissued patent was as follows:

"Be it known that I, James Eachus, of Coatesville, in the county of Chester, and State of Pennsylvania, have invented a new and improved Process of Cutting Paper Boards, of which the following is a description, reference being had to the accompanying drawings, in which

"Figure 1 is a front view of my machine for conducting my process. Fig. 2 is a side elevation of such machine. Fig. 3 is a top view, and Fig. 4 is a detail of a saw in the act of cutting. "Similar letters of reference indicate corresponding parts in the several figures.

"The object of this invention is to trim and cut heavy paper used in the manufacture of boxes and books; and it consists in subjecting the paper while in a wet state, as it is taken from the paper-making machine, to the action of circular cutters having serrated edges, whereby the sheets are cut evenly and economically, and the trimmings can be returned to the paper machine without regrinding or other treatment.

"In the annexed drawings I have represented one practical form of a machine for conducting my process; but I desire to be understood as not confining myself to the precise construction of such machine, nor to the number of serrated cutters shown.

"In Fig. 3, E designates the frame, which should be strongly constructed. B B and T T are guides on frame E. A is a two-way carriage, which is constructed in such manner as to play freely on the guides B B and TT. D and Fare sawshafts, which are mounted upon adjustable bearings bolted to frame E. CCC and SS S are circular saws or cutters, having serrated edges, adapted for the purpose intended, which saws are secured upon shafts D and F by adjustable collars.

"For the purpose of operating this machine, shafts D and F are provided with pulleys P P. Motion is communicated by belts HH, Fig. 2, from a shaft G, on which are pulleys P'P'. "The paper to be cut is put upon the carriage A. The pile is composed of a number of large sheets as they are taken from the paper-making machine in a very wet condition.

The

Statement of Facts.

carriage is then drawn upon the guides B B, saws S S S cutting through the paper; thence at right angles to the first direction upon guides T T, saws CCC cutting through the pile in the new direction, the result of the operation being to trim the edges of the sheets and cut each sheet into four parts. "The saws can be adjusted on shafts D and F, so as to trim and cut the sheets any desired size.

of

"It will be seen from the above description that I take sheets paper, while they are in a wet condition, directly from the paper-making machine, and pass the saws over them, thereby trimming their edges, and leaving them of an equal thickness throughout, and dividing them into smaller sheets. This process of sawing cannot be performed successfully and without tearing the surface of the sheets unless the sheets are wet, and in the condition in which they leave the paper-making machine. "I make no claim to the arrangement of circular saws and carriages for the purpose of sawing logs or any kind of wood; nor do I broadly claim the machine herein described for sawing wood.

"I am aware that paper board has heretofore been sawed when in a dry state, and I therefore lay no claim to such invention, which leaves the edges of the paper thus sawed in a jagged condition, the action of the saw-teeth tending to separate the fibres of the paper board in the line of the kerf; whereas, when the paper board is sawed in a wet state, directly after leaving the paper machine, the edges are left smooth, the saws causing an interlocking of the fibres in its path through the paper, and the trimmings of the paper being in a condition to be returned to the vat without regrinding, which would not be the case with trimmings of paper board sawed in a dry state.

"What I claim as new, and desire to secure by letters patent, is

"The process of sawing paper board as herein described, consisting in sawing the paper board while it is in the wet state in which it is taken from the paper-making machine, substantially as described, and for the purpose set forth."

The only defences set up in the answer were a denial of the

VOL. CXV-28

Opinion of the Court.

validity of the reissued patent, and a denial of the alleged infringement.

Mr. Wayne Mc Veagh and Mr. Joseph C. Fraley [Mr. George Tucker Bispham was with them on the brief] for ap pellant, contended that the reissue and the original letters patent were for the same invention; and further that the defence of want of novelty could not be considered under the pleadings in this case, as no notice of prior knowledge or use was given in the answer, and as all evidence touching this point was seasonably objected to. Rev. Stat. § 4920.

Mr. Charles H. Pennypacker for appellee.

MR. JUSTICE MATTHEWS delivered the opinion of the court. He stated the facts in the language above reported, and continued:

A comparison of the two patents, for the purpose of determining the question raised as to the identity of the inventions described in them, requires an interpretation of the original patent in the light of the state of the art at the date when the application for it was filed. And we have the material for ascertaining its meaning, in that view, by means of the evidence on that point contained in the record, which, although objected to on the ground that no prior use or knowledge of the invention claimed had been specifically set up in the answer as a defence, was nevertheless admissible for the purpose of defining the limits of the grant in the original patent and the scope of the invention described in its specification. Vance v. Campbell, 1 Black, 427; Brown v. Piper, 91 U. S. 37.

From that evidence, it appears that, at the time of the alleged invention of the appellant, and for many years prior thereto, paper boards for bookbinding or for making boxes were cut, trimmed or separated, while in a wet or moist state, as the paper in sheets came from the mill, by means of a hand saw, sometimes with teeth, and sometimes ground with a curved line to a sharp edge. This was the mode or process in universal use. Heavy paper coming from the machine in a

Opinion of the Court.

dry condition was cut, for similar purposes, in one direction by means of rolling shears; that is, revolving circular discs, operated on a shaft, their edges ground to an angle of about sixty degrees, the same as a pair of scissors; and in the other direction by straight shears, acting like ordinary scissors.

It is manifest, from this state of the art, that it was not open to the appellant, at the time he applied for his patent, to claim as his invention the discovery that heavy paper, intended for the use of bookbinders and box-makers, could best be cut into proper shapes and sizes, while in wet sheets, as they came from the machine, nor that the cutting could best be performed by cutters with serrated edges. For this was matter of general knowledge and common practice.

Accordingly, in the specification to his original patent, he declared the nature of his invention to consist "in combining six adjustable circular saws upon two shafts, set at any angle to each other, and a two-way carriage supported by a frame, and provided with guides so as to work easily and carry the material to be cut." Then follows a description of the machine which contains this combination, and of the mode of operating it, so as to effect the result, of cutting the large wet sheets of heavy paper, placed on the frames for that purpose, in both directions, into smaller sheets of any desired sizes. This description refers to the drawings, which show the machine with all its parts, and their relations to each other, in their combination.

But none of these parts, either in their construction or mode of operation, or general function, are novel; for saws and shafts, and frames for carrying material to be cut, had been in common use for cutting other material, and were well known. Accordingly, the appellant, in his specification, enters an express disclaimer as to all such uses, and the combinations and arrangements of well-known machinery by which they had been effected. He says: "I make no claim to the arrangement of circular saws and carriages, working upon guides for the purpose of cutting logs, blocks of wood, wood of any kind, or any other material except paper." And thereupon states his claim, precisely, as follows: "The combination of shaft D,