Page:Federal Reporter, 1st Series, Volume 2.djvu/369

 362 FEDERAL REPORTER. �accumulation or thickness of metal at the corner of the can caused by the overlapping there of two or more thick- nesses of tin upon each other. This notch, a, is the clamp- ing angle of the jaw, and the drawing shows that its construc- tion is Buch that it is intended, without any enlargement or recess in it, to fix tightly against the metal of the can whicb goes into the notch or angle, while the adjacent pieces of the jaw on each side fit closely against the two edges of the can. This can only be done so as to make a uniform pressure and bearing of the entire eitent of the two faces and angle of the jaw, by getting rid of having any accumulation or thickness of metal at the corner of the can. Accordingly, the drawing of the can, (figure 2,) showing the can with its head or end placed loosely on it, ready to be clamped, shows the metal at the adjacent ends of two parts of the head to be eut away, so as thuB to get rid of any overlapping at the corner of the metal of one part of the head over the metal of the adjacent part of the head, and to enable the angle of the clamping jaw to be strictly a ïight angle." �This was the structure and arrangement as shown in the drawings of the original patent. The drawings of the re- issue are the same. But in the specification of the re-issue these words, namely, "the object of this part of my invention being in the case of angular cans, to perfect the corners or angles at the top or bottom of the can simultaneously with the closing and clamping of the entire seam at the top or bottom of the can, and to produce thereby a more perfect joint than can be obtained in machines in which the top and bottom seams are closed by clamping jaws, which, bearing only against the sides of the head, do not embrace the corners or angles thereof," are found, which are not contaiued in the specifications of the original patent. The defendants' expert states that he does not find in the original patent any war- rant for this language, because the head of the can shown in the drawing of the original patent "is a notched head, which bas no corners to be perfected, and which, when used, would prevent pressure from being applied to the corner of the body of the can." ����