US1002876A - Paper-cutting machine. - Google Patents

Description

C. SBYBOLD.

PAPER CUTTING MACHINE. APrLIoATIon rum) In 1s', 1910.

1,002,876. Y Patented sept. 12, 19111.

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C. SEYBOLD. PAPER GUTTING MACHINE'. APPLIoA'rIoN rILnn 'un 1s. 1910.

1 ,002,876. Patented Sept. 12, 1911.

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PAPER-CUTTING MACHINE.

Continuation of application Serial No. 491,926, filed April 24, 1909.

Specification of Letters Patent.

Patented Sept. 12, 1911.

This application filed May 13, 1910.

Serial No. 561,180.

T all lwhom it may concern.:

Be it known that l, CHARLES SnYnoLD, a citizen of the United States, and a resident of the city of Dayton, in the county of lt/fontgomery and State of Ohio, have invented certain new and useful improvements in Paper-Cutting Machines, o-f which the following is a full, clear, and exact description, reference being had'to the accompanying drawing, forming part of this specification, this application being a continuation of my application, Serial No. 491,926, filed April 24, 1909.*

ln the cutting of paper stock on paper cutting machines where the material is arranged in piles and held by clamping 'pressure on a supporting table to be severed by a cutting knife, the difliculty experienced in holding and cutting the pile is due to a very large extent to the crushing action of the beveled side o-f the knife passing through the pile. To allow the knife to pass through the paper, every sheet as it is cut has-to shift in front of the beveled edge to allow for the thickness of the knife. lNith thick sheets of cardboard, fibers of the material have to be crushed back so that as the material is held in a plane at right angles to the cutting plane it becomes a diflicult matter to hold the sheet or pile against this lateral strain. lVhere the sheets of paper are soft and spongy and have a tendency to cohere, the same difficulty is experienced, because each sheet must move away from the beveled edge as the knife passes through the pile.

1t is the object of my invention to overcome this difficulty and to render more effective the action of the knife in severing the sheets of material which are to be cut, and l accomplish the result by the construction hereinafter particularly pointed out and claimed, in which I arrange to remove or displace the support for the pile of sheets to the front of the cutting plane during the action of the knife. In this way the material of its own weight bends away from the cutting edge, and the sheets fall away from each other so that they can be readily andfeasily shifted by the beveled edge of the kni e.

While I shall illustrate the application of my invention as applied to the type of paper cutting machines shown and described in Letters Patent No. 918,205, issued April 13, 1909, it will be readily understood that the invention can be applied t0 any of the types of paper cutting machines now on the market, without departing from the spirit of my invention.

ln the drawings, Figure 1 is a front elevation of a paper cuttingmachine with my improvements applied thereto. Fig. 2 is a side elevation of the same. Fig. 3 is a cross section of the machine taken on the lines 3, 3, of Fig. 1. Fig. 4 is a detailed section taken on the lines 4, 4, of Fig. 2.

1, 1 are the side standards, 2, 2, the cross braces and 3 the table which forms a' solid and substantial framework for the operating parts of the paper cutter.

4 is the main driving shaft of the machine mounted in suitable bearing in the framework, provided with the fly-wheel 5, and the driving pulley 6, and with the usual friction clutch mechanism, starting and stopping levers, etc., for operating the machine which l have not thought necessary to illustrate in detail. The driving shaft carries a worm 7, which meshes with a worm gear 8, mounted on the counter shaft 9, suitably journalcdin the cross braces. This shaft carries the pinion 10, which meshes with the gears 11 and 12 mounted on short counter shafts journaled in the framework, and these shafts at their forward ends carry crank pins 13, 14, the outer ends of which ride in the diagonal slots 15, 16 in the cam plate 17, the ends of which are guided vertically in a suitable guideway in the side standards, rollers on the standards engaging in diagonal slots 1S, 19 in the ends of the cam plate. lThe outer ends of this cam plate are securely bolted by the rods 20 to the outer ends of the knife carrier plate 21, which knife plate is provided with diagonal slots 22, 23, which are engaged by rollers on the standards so as to permit a shearing cut for the knife 24, which is suitably bolted to the knife carrier 21.

is the clamp bar for clamping and holding the material under the action 0f thecutting knife. The clamp bar is connected at its outer ends by the pins 26, with the cross head 27 which cross head on each end is connected by the clamp pulling bars 2S, with the racks 29, 29. For the purpose to be hereinafter described, these pulling bars 28 pass down loosely through the rack bar and are provided with nuts 30 at their lower end so as to leave a slight play between the lower edge of the rack bar and the nuts 30 of the pulling bar. The racks 29 are actuated by the segmental gears 31 on each side of the machine, and these segmental gears are mounted on rock shafts 32.-suitably journaled on the sides of the framework. The inner ends of these rock shafts are provided with arms 33 which connect the two segmental gear rock shafts on each side with a horizontally disposed friction clutch connecting bar 34, which connecting bar is surrounded by a friction box made up of plates 35, 36 bolted together so as to obtain the proper tension on the connecting bar 34, and this friction box is reciprocated horizontally by suit-able connection with the driving mechanism so that the connecting bar 34 which connects the two segmental gears which vdrive the clamp will be frictionally actuated.

Mounted lengthwise on the table 3 underneath the cutt-ing edge of the knife 24, is the usual wooden strip or bar 90 to serve as a cutting block for the knife.

I have not thought it necessary to describe in any further detail the construction and operation of the operating parts of the paper cutter, as such mechanism forms no part of my present invention', but is equally applicable to any other construction of a paper cutting machine in which a table is provided for supporting the pile to be cut in con nection with the clamp operating and knife driving mechanism tor properly hold and sever the pile.

To carry out my invention, I construct the table for supporting the pile in two parts, the ordinary iiXed table 3, and a movable or hinged section 37. In the embodiment of my invent-ion as illustrated in the drawings, this table section 37 is provided with pins 38 and 39 at each side edge, which pins eX- tend through a segmental slot 41 in the side standard at each side, and are supported by the arms 42, 43, mounted on the rock shaft 44 journaled acrossv the front of t-he machine, the rock shaft being normally held by the coiled spring 45 with the arms 42, 43 in a positie-nto support the table, so that normally the table section 37 will be continuous with the fixed table 3.

The section 37 is hinged to the table 3 on a line preferably in front of but close to the cutting plane of the machine, and in order to prevent trouble and annoyance from dirt and paper chips the table section 37 is so hinged that when the support for the outer end'is removed andthe table drops, no opening will be formed at the hinged edge. To provide for this I form a flange 46 along t-he lower inner edge of the table section 37, the rear of which flange is cutaway at 47 to allow the table to swing down and the front portion 48 of this flange is formed on the arc of a circle inl cross section, the center of the circle being in the line of the meeting edges of the table section. 49 is a plate secured to the framework or table 3, which is curved upward at its front end at 50, to support the segmental surface 48 of the table section 37, and the parts are held together by the segmental shoes 51, 51, secured by the bolts 52, to the segmental iiange 46. lVith this construction it will be evident that as the table drops it will turn on the meeting edge without opening up.

The package or pile of paper to be trimmed is located on the table 3, and adjusted against the back gage with the front portion of the pile resting on the table section 37. It is of course preferable that the clamp should reach the paper pile before the knife begins to cut and the entire pile must be properly supported before the cutting operation, and inasmuch as the piles to be cut are of different heights and there are, therefore, varying distances of travel for the clamping knife, the table section is not arranged to drop at any fixed pointof the knife throw. In order to provide, therefore, that no matter what the height of the pile, the clamp shall reach and hold the paper stock before the table is released, I provide as follows: As hereinbefore stated, the pulling bars 28 for the clamp are attached loosely to the rack 29 between the nuts 30 and the nuts 53. Now as the machine operates the weight of the clamp bar itself will keep the nut-s 53 in contact with the rack 29. As soon as the clamp stops on the paper the movement of the segment gear 31 carries the rack 29 along the pulling bars until stopped by the nuts 30, when the full clamping pressure is applied to the paper pile. Attached to the side of the rack 29 and securely bolted thereto is a bar 54 which is curved at its upper end as shown by dotted lines 55 in Fig. 2, and this curved portion of the bar i`s normally in engagement with the pin or roller 56 on the lower end of a lever 57 which is pivoted at 58 to the cross head 27 of the clamp.' The lower end of this lever 57 extends downwardly in front of a roller or pin 59.011 the connecting bar G0 which is held in slotted engagement with the frame by the pin 61 on the frame which passes through the slot 62 in the connecting bar. This connecting bar is pivotally connected with the upper end of the supporting arm 42 at 63. The results from this construction are that the moment the rack bar 29 is moved by the segment gear to tl ie lower end of the pulling bars, the curved end of the bar 54 will shift the lever 57 which, coming in contact with the pin on the end of the connect-ing bar 60, will shift the supporting arms 42 and 43 from under the pins 38, 39 on the table and thus removing the support, will allow the table section 37 to drop. As the parts will remain in their normal position until the clamp reaches the paper pile and is stopped thereby, it is evident that the table support will not be released until the clamp reaches the paper, and that, therefore, the construction will act aultomatically for any height of a paper p1 e.

In order to return the table section 37 to its normal position after the knife has finished its operation, I provide a pair of lifting rods 65, 65, the upper ends of which are secured by the universal oint 66, to the under surface of the table, and these rods pass loosely down through the coupling sleeves 67, 67, which sleeves are coupled by a universal joint construction 68 to the crank pins 13, 14. A coiled spring 69, to serve as a buffer spring is mounted on each of these lifting rods 65, bearing between the sleeves 67 and coupling head 70. rI`hese lifting arms are so coupled to the crank pins 13, 14, that the table will be lifted by the rotation of the crank pins through the buffer spring connection 69 interposed between the sleeves 67 and the head 70, but during the down stroke of the clamp and knife bar the table will be free to drop when released by the supporting arms 42, 43, as above described. The universal joint construction is provided for the lifting arms as the table drops in one direction, and the crank pins 13, 14 rotate in another direction.

71 is a hand wheel for rotating the rod 7 2 which has connection with the back gage for adjusting same, and this hand wheel necessarily is provided with the universal joint construction where supported by the table section 37.

73 is the starting bar for the machine controlled by a handle 74 and supported by the side levers 7 5, 75.

The operation of the machine will be evident from the foregoing description. The operator jogs up his pile of paper stock, sheets or cardboard or the like on the table 3, and its extension 37. rllhe machine is then started and the clamp bar 25 descends to the pile. The moment it reaches the pile and holds same, and the clamping pressure is increased by the driving power of the machine, the supports are removed from the front of the table section 37, and the table drops within the limits of the slots 41. That part of the pile in front of the bevel edge of the knife, therefore, bends downward and each sheet is free to move readily as it is cut and the diiculty experienced in forcing the knife through the pile is very largely removed.

It will be evident, of course, that the particular mechanism employed for operating the clamp and driving the knife through the pile is not the essential of the present invention, and that the drop table construction can be readily applied to any of the well known forms of paper cutters.

In the construction illustrated and described, the table lifting arms provided for returning the table section 37 to its normal position continuous with the fixed table 3, are connected with the crank pins which operate the cam plates so that after the clamp and knife is raised to its starting point, the crank pins lift the arms and raise the table until the pins 38 on the table are again caught under the supporting arms 42, 43. The buffer springs 69, 69, are provided to prevent any jar and hammering as the table is lifted.

It will be understood that the line of division between the fixed table 3 and the table section 37 with reference to the cutting plane may be varied within reasonable limits without departing from the spirit of my invention. With material for the knife to cut against laid on the table, the line of division between the table sections might coincide with the cutting plane, but ordinarily with the usual cutting block as illustrated in the drawings, the division line of the sections will be slightly forward of the cutting plane. In claiming my invention, I have used the term adjacent to as describing this line of division, and this term is used with the above understanding.

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

1. In a paper cutting machine, a support for the material to be cut, cutting and clamping mechanism, and means to withdraw the support from the material at one side of the cutting plane upon the engagement of the clamping mechanism therewith, to permit the material to recede from the cutter as it is cut.

2. In a paper cutting machine, cutting and clamping mechanism, and a table to support the material to be cut divided into two sections adjacent to the cutting plane, with means causing one section to drop away upon the engagement of the clamp with the material to be cut.

3. In a paper cutting machine, cutting and clamping mechanism, a table to support the material to be cut terminating adjacent to the cutting plane, and a supplemental table normally in the same plane with the first named table, and means causing said supplemental table to drop away upon the engagement of the clamp with the material to be cut.

4. In a paper cutting machine, with cutting and clamping mechanism, a table to support the material to be cut terminating adjacent to the cutting plane and a supplemental table normally in the same plane with the first named table, a support for said supplemental table, and means for releasing said support upon the engagement of the clamp with the material to be cut.

5. In a paper cutting machine, cutting and clamping mechanism, a table to support t-he material to be cut terminating adjacent to the cutting plane, and a supplemental table normally in the same plane with the iirst named table, a lsupport for said supplemental table, and means for releasing said support upon the engagement of the clamp with the material to be cut, with mechanism for returning the supplemental table to its normal position upon the completion of the cutting operation.

6. In a paper cutting machine, cutting and clamping mechanism, a table to support the material to be cut terminating adjacent to the cutting plane, and a supplemental table normally in the same plane withthe iirst named table, and means connecting said support with the clamping mechanism to release same upon the engagement of the clamp with the material to be cut.

7. In a paper cutting machine, cutting and clamping mechanism, a table to support the material to be cut terminating adjacent to the cutting plane, and a supplemental table normally in the same plane with the first named table, a support for said supplemental table, and means intermediate the clamping mechanism and the support to release the support simultaneously with the clamping of the material to be cut.

8. In a paper cutting machine, cutting mechanism, a table to support the material to be cut terminating adjacent to the cutting plane, a supplemental table normally in the same plane with the first named table, a support for said supplemental table, a clamp movable byy its own weight to engage the paper, a member constructed to operate said clamp to subject the paper tov increased pressure, and mechanism intermediate the supplemental table support and the clamp operating member adapted to release said support upon the operation of the clamp operatingV member.

9. In a paper cutting machine, cutting mechanism, a table to support the material to be cut terminating adjacent to the cutting plane, a supplement-al table normally in the same plane with the first named table, a support for said supplemental table, a clamp movable by its own weight to engage the paper, a member constructed to operate said clamp to subject, the paper to increased pressure, pulling bars connected with said clamp, a power operating member connected f with said pulling bars to operate said clamp upon its engagement with the paper, mechanism intermediate the support and the power operating member adapted to release said support upon the operation thereof.

l0. In a paper cutting machine, cutting mechanism, a table to support the matcriaii to be cut terminating adjacent to the cutting plane, a supplemental table normally in the same plane with the first named table, a support for said supplemental table, a clamp movable by its own weight to engage the paper, a member constructed to operate said clamp to subject the paper to increased pressure, a connecting bar connecting the supplemental table support with the power operating member, and means to shift said connecting bar to withdraw the table support upon the operation of the power operating member.

l1. In a paper cutting machine, cutting mechanism, a table to support the material to be cut terminating adjacent to the cutting plane, a supplemental table normally in the same plane with the iirst named table, a support for said supplemental table, a clamp movable by its own weight to engage the paper, a member constructed to operate said clamp to subject the paper to increased pressure, a rack and gear frictionally connected with the knife driving mechanism for operating the clamp, connection for the rack with the clamp to permit the clamp to engage the paper by its own weight, and a tripping device interposed between the rack and the clamp actuated by the movement of the rack to trip the table support to release 'same simultaneously with the clamping of the paper.

12. In a paper'cutting machine, a cutting table, a cutting knife and clamp reciprocal toward and from the table, said table eX- tending beyond the cutting plane, a cutter block supported beneath the cutter, a leaf or support pivotally supported substantially at the edge of the cutting table and adjacent to the cutting plane, and means for swinging said table on its pivot to permit the material to recede from the cutter when cut.

13. In a paper cutting machine, a support for the material to be cut, cutting and clamping mechanism, and means to withdraw the support from the material at one side of the cutting plane, to permit the material to recede from the cutter as it is cut.

CHARLES SEYBOLD. Attest:

FRANK I-I. HERBST, O. A. STUHLDREHER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

' Washington, D. C.

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