US1173580A - Paper-cutting device. - Google Patents

Description

E. P. JENNINGS, JR. PAPER'CUTTING DEVICE. APPLICATION FILED MAR. 27. 1914.

"Patented Feb. 29, 1916.

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EMERSON 1?. JENNINGS, JR., OF LEHIGHTON, PENNSYLVANIA.

PAPER-CUTTING DEVICE.

Specification of Letters Patent.

Patented Feb.29,1916.

Application filed March 27, 1914. Serial No. 827,555.

To all whom it may concern:

Be it known that I, EMERSON P. JEN- NINGS, Jr., a citizen of theUnited States, residing at Lehighton, in the county of Carbon and State of Pennsylvania, have invented certain new and useful Improvements in Paper-Cutting Devices, of which the following is a specification, reference being had therein to the accompanying drawmg.

This invention relates to paper cutting devices and is designed more particularly for use in connection with a printing press.

The object of the invention is to provide a cutting device in which the blade and the shearer bar will be held in close engagement during the cutting operation, thereby securing the most efiicient cutting action.

To this end it is a further object of the invention to so construct and arrange the blade and the shearer bar that they will exert pressure one upon the other during the cuttingoperation; and to provide means whereby this pressure may be regulated,

In the accompanying drawings, Figure l is a front elevation of a cutting mechanism embodying my invention showing the same applied to a printing press; Fig. 2 is a horizontal section taken on the line 2 2 of Fig. 1; and Fig. 3 is a vertical section, taken on the line 3 3 of Fig. 1.,

In these drawings I have illustrated one embodiment of the invention and have shown the same 7 mounted upon the discharge end of a printing press, but it will be understood that this particular embodiment of the invention is chosen for the purpose of illustration only and further that the invention resides in the device itself and not in its application to the press, and that the device is capable of use alone or in combination with other mechanisms.

In the particular embodiment of the invention here illustrated I have shown the same as mounted upon the forward end of a frame 1 forming part of a printing press frame and comprising a bed plate 2 over which the paper is fed to the cutting mechanism. Supported on the main frame 1 ad jacent to the edge of the bed plate 2 is a shearer bar 3 which cooperates with a blade 4 mounted upon the frame 1 for vertical reciprocatory movement, which movement carries the cutting edge of the blade past the upper or cutting edge of the shearer bar.

The blade is here shown as carried by a cross head 5 having at its opposite ends vertical bearings 6 by means of which it is slidably mounted upon upright posts 7 car ried' by the main frame. Reciprocatory movement is imparted thereto by means of eccentric rods 8 connected with the opposite ends of the cross head and mounted upon eccentrics 9 carried by a transverse shaft 10 also journaled in the frame of the press and having thereon a sprocket wheel 11 by means of which rotation is imparted thereto. It will be understood, however, that the particular mechanism here shown for supporting and imparting movement to the blade is peculiar to this particular embodiment of the invention and is not essential to the operation of the invention. The cross head 5 also carries a paper holding bar 12 which is suspended at the lower end of a series of rods 13 slidably mounted in the cross head, and is held normally in its lowermost position by means of series of springs 14 coiled about the rods 13. The holding bar 12 is supported in such relation to the cross head that when the latter is in its uppermost position the bar will be raised above the bed plate 2 to permit the paper to be fed, forward beneath the. same, but upon the downward movement of the cross head and before the blade 4 has been brought into operative relation with the shearer bar 3, the holding bar will engage the paper on the bed plate and hold the same against displacement vduring the con tinued downward movement of the blade.

The blade 4 is mounted at a slight longitudinal angle to the shearer bar 3, as shown in an exaggerated form in Fig. 2. This arrangement is such that the. lower edge of one end of the blade will clear the upper edge of the shearer bar and that the further movement of the blade, the cutting edge of which is inclined relatively to the cutting edge of the shearer bar, will bring the blade into contact with the edge of the shearer bar and cause these parts to exert pressure one on the other, thereby increasing the efficiency of the cutting action. The shearerv bar is preferably yieldingly mounted. so that it can yield to permit the passage of the blade but has sufficient tension to cause the desired pressure to be exerted upon the blade. Preferably, means are provided for regulating the tension of the shearer bar and, consequently, the pressure exerted upon the shearer bar. This may be accomplished in different Ways but, in the present instance, I have formed the shearer bar 3 of resilient metal, such as steel, and have mounted the same at its lower end upon a projection or longitudinal shoulder 15 arranged some distance below the bed plate 2 of the frame so that the upper edge of the shearer bar will be spaced away from the adjacent portions of the frame 1 and bed plate 2 and will be movable toward and away from these parts. Preferably, the face of the shoulder 15 is oblique to the vertical so that when the shearer bar 3 is drawn into a substantially vertical position it will be placed under tension and this tension may be regulated by varying the amount of displacement of the 7 upper portion of the shearer bar from its normal position. In the present instance the lower edge of the shearer bar is secured. to the frame by a series of screws 16 and a second series of screws 17 are passed through the shearer bar and screwed into the adjacent portionof the frame 1 at a point above the shoulder 15 so that by adjusting these screws the upper edge of the shearer bar may be displaced to a greater or lesser extent. When the lower portion of the inclined cutting edge of the blade passes the adjacent portion of the cutting edge of the shearer bar the adjacent faces of the blade and shearer bar are brought into contact-and caused to exert pressure one on the other. This pressure, of course, increases as the blade continues its downward movement, owing to the angular relation of the parts, but the shearer bar will yield sufficiently to permit the blade to pass but will have sufficient tension to'maintain the desired pressure on the blade.

While I have shown and described one embodiment of the invention it will be understood that this has been chosen for the purposes of illustration only and that I do not desire to be limited to the details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a cutting device of the character described, a blade having bodily movement and a shearer bar cooperating with said blade, one of said members comprising anelongated plate of resilient metal rigidly mounted at one of its longitudinal edges and having that edge adjacent to the other member free to move relatively to the rigidly mounted edge thereof, the movable edge of said member being arranged to engage the edge of the other member when bodily move ment is impartedto said blade and to yield under the pressure exerted thereon.

2. In a cutting device of the character described, a blade having bodily movement, a shearerbar comprising a plate of resilient metal rigidly mounted at one edge and having that edgeadjacent to said plate free to move, the free edge of said shearer bar being arranged to be engaged by said blade and to yield under the pressure exerted thereon, and adjustable means to-limit themovement of said free edge of said shearer bar toward the path of said blade but to permit it to have free movement away from said blade, whereby said pressure may be regulated.

3. In a cutting device of the character de scribed, a blade having bodily movement, a shearer bar comprising a plate of resilient metal rigidly mounted at one edge and having its body portion free to move, the movable portion of said shearer bar being arranged to be engaged by said blade and to yield under the pressure exerted thereon, and adjustable means to limit the movement of the body portion of said shearer bar toward the path of said blade and to permit it to have free movement away from said path, whereby the pressure exerted on said shearer bar by said blade may be regue lated.

4. In a cutting device of the character described, a frame, an elongated blade mounted for vertical reciprocatory movement on said frame, a shearer bar comprising a plate of resilient metal rigidly mounted at one edge on said frame in a plane oblique to the vertical plane of said blade and having thatl portion adjacent to said blade free to move, and means to adjust said movable portion of said shearer bar relatively to said blade.

5. In a cutting device, a frame comprising a bed plate having a shoulder arranged on 105 one end thereof, substantially parallel with and spaced away from the upper surface of said bed plate, a shearer bar comprising a plate of'resilient metal rigidly secured at one edge to said shoulder and having its 110 upper edge spaced away from and movable relatively to the end of said bed plate, a blade mounted for vertical reciprocatory movement on said frame and arranged in a plane slightly oblique to the vertical plane of 5 the shearer bar, and set screws extending through said shearer bar into said bed plate to adjust the upper edge of said shearer bar relatively to said blade. 7

In testimony whereof, I 'affiX my signature 120 in presence of two witnesses.

EMERSON P. JENNINGS, JR.

Witnesses:

P. M. WAUL, ELIZABETH B. GAssNER.

Copies of this patent may be obtained for five cents each, byaddressi ng the Commissioner of Iatents,

' Washington, I). c.

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