US51669A - Executob of the estate - Google Patents

Description

UNITED STATES PATENT OFFICE.

VILLIAM SMITH, OF WINDHAM, CONNECTICUT, EXECUTOR OF THE ESTATE OF ENOS P. BECKWITH, DECEASED.

PAPER-CUTTING MACHINE.

Specification forming part of Letters Patent No. 51,669, dated December 19, 1865.

To all lwhom it may concern:

Be it known that ENos P. BEcKwrrH, of South Windham, in the county of Windham and State of Connecticut, (since deceased,) did invent certain new and useful Improvements in Machines for Cutting Paper; and it is hereby declared that the following is a full and ex- A act description thereof.

The accompanying drawings form a part of this specification.

Figure 1 is a side view, and Fig. 2 is a front View, representing the principal portions of the machine. Fig. 3 represents some of the details which are nearly concealed in Figs. 1 and 2; and Figs/.1c and 5 are sections through some of the parts, FigA being a view, partially in section, of a small portion .in Fig. 2, and Fig. 5 being a section on the line T T in the same ligure.

Similarletters of reference indicatelike parts in all the iigures.

This machine is adapted to receive the paper in a continuous sheet, either directly from the Fourdrinier or from a large roll, in which form it has been previously taken from the Fourdrinier and mounted on a suitable stand. (Not represented.) It cuts the paper into sheets of the desired size and deposits it in apile. Any of the ordinary means may be employed for aiding in the delivery of the paper from the roll, and in the accurate piling', counting, Src., of the sheets.

To enable others skilled in the art to make and use this invention, the following detailed description is presented.

The letters of reference refer to thecorresponding letters ou the drawings.

Ais aframing of wood. Bis adrum mounted on a stout shaft supported on the framing A, and carrying a knife, b.

a is a fixed knife, supported 011 the framing A in the position represented, so that at each revolution of the drum B the knife b cuts the paper by acting thereon between itself and the fixed knife a. This shaft B is rotated with a continuous and uniform movement by means of a stout belt acting on the pulley B as represented in Fig. 1.

The paper is fed down to the point where it is acted on by the knives b and a with an intermittent motion, its motion being entirely suspended during the period while the knives are acting. The knives b and a may be set with any amount of shear which is necessary to perform the work smoothly and without strain. If the shear is great, a considerable period must elapse while the cutting is being performed. The mechanism is so arranged that the paper is detained and held entirely stationary' for a longer period than is ever required to com plete the division of the paper.

When the sheetof paperhas been completely divided the part below falls, or is removed by mechanism not represented, to be folded in quires or otherwise disposed of.

It is important to prevent the front edge of the paper which remains above the knife a from catching or lodging on the knife a, and thus interfering with the proper motion of the paper when it is again fed forward. This is effected by the pendulous piece C, which is hung on the slight shaft c, and inclines forward by its gravity.

When the rotation ofthe shaft B brings the knife b into contact with the sheet of paper, it easily presses back the pendulous piece C into the position shown in strong lines in'Fig. 5; but the moment the paper is completely divided and the knife b has passed entirely below the lower edge of the piece C the latter springs forward by gravity into the position indicated in dotted lines. This movement throws the edge of the paper forward, entirely clear of the knife a.

The mechanism by which the proper intermittentmotion of the paper is obtained Will now be described.

l2 is a slotted arm or crank on the overhangiug end of the shaft of B. A crank-pin, B3, is rmly fixed thereon. A connection, D, leads from this crank-pin to a pin, E, which is fixed on the segment E, adapted to vibrate on the center e. The revolution of the shaft B communicates a regular reciprocating motion to the segment E, which gears into a Wheel, F, which is tted loosely on an overhanging end of a shaft, g. This shaft g carries a drum, G, between which and the drum H the paper is received, and is held fast or fed forward according as the drums G and H are operated. The large hollow wheel G is, like the drum G, securely fixed on the shaft g. The

gear-wheel F carries a short sleeve, F', which projects into the interior of the hollow wheel G', as indicated. Friction-pawls G3, mounted on centers G4, are pressed by the springs, G5 into contact with the exterior of the sleeve F at such an angle that the friction between the ends of the pawls G3 and the sleeve F will turn the wheel G with its connected parts when the wheel F rotates in one direction, but will produce no effect when the said wheel rotates in the opposite direction.

The action of this portion of the mechanism will now be readily understood. The drum H being pressed down upon the drum G by its gravity or other suiiicient force to properly hold the paper, the rotation of the crank B2 gives a reciprocating motion to the segment E, and thus rotates the wheel F and the drum G in the proper direction to feed forward the paper to a proper extent while the knife d is traveling idly around with the rotation of the drum B. Before the knife d strikes the paper the segment E commences to move in the opposite direction, and consequently to rotate the wheel F and sleeve F in the opposite direction. This movement produces no effect on the drum G, because the sleeve F is allowed to revolve idly in this backward direction without communicating any force to the friction-pawls G3. The wheel G and the connected parts therefore are allowed to remain at rest during the entire backward motion of the wheel F, or during one semi-revolution of the drum B.

In order to insure that the drums G and H, and consequentlythe paper held between them, shall remain entirely motionless during this period, I provide a strong brake, M, adapted to turn on the bearing m and to apply tightly against the under surface of the wheel G. It is pressed up to its work by a strong spring, J, which is cased within a suitable housing on the framing A, as indicated. This brake is allowed to rise by the force of this spring, and to hold the wheel G very firmly so soon as the segment E, and consequently the wheel'F, commence their backward movement, or the move- `ment which tends to carry the paper backward between the drums G and H. A little before the segment E and the connected parts commence the motion in the opposite direction, so

as to feed forward the paper, a projection, M',

on the eXtreme end of the brake M is struck by a short arm, B4, which is carried on the shaft of B, and is pressed downward a considerabledistance, so that the brake M is entirely clear of the wheel G. The brake M is held in this position by the spring catch N, which is mounted on the side of the framing A, and is adapted to hook or catch over the projection M when the latter is in its lowest position. The upper end of the spring-catch N is marked n, and is bent considerably inward toward the drum B, as indicated in Figs. 2 and 4. The shaft B turns freely around af ter shearing off the paper, and depressing the lever M without resistance from friction on the brake M, the latter being held down by the .spring-catch N, entirely independent of any of the moving parts. This condition continues until the period arrives when the crank B2 is again on its dead point and the forward motion of the drums G and H has consequently ceased. At this juncture the bent end n of the spring-catch N is touched by a spur or side cam, B5, which is carried on the back side of the crank B3, and the catch N is thus detached from its hold on the brake M, when the latter is immediately driven upward by the tension of the spring J, and firmly holds the wheel G and the connected mechanism until it is again pressed downward and again confined, as before described.

K is a coiled spring of considerable length, connected to any convenient portion of the stand from which the paper is delivered. It tends to pull the segment E continually to the left, as seen in Fig. l, and thus tends to balance the gravity of the segment E, and also to aid the mechanism in its slight labor of pulling the paper forward.

This machine possesses very marked advantages ver those before used for this purpose. Some of these may be specifically enumerated as follows:

First, the fact that the cutting is effected by a revolving knife, in lieu of a reciprocating one, brings the cutting-edges in contact but once instead of twice for each cut, and allows the machinery to operate niore rapidly and with less vibration and strain 5 and the fact that the paper is stopped and held motionless dnring the period while the knives are acting on it allows the cutting to be effected with knives of a practicable and convenient' form with any amount of shear which is desired; and the further fact that the stopping and starting are not done with a positive and reliable motion, but by gradual increments or a gradual stopping and gradual starting, in lieu of the sudden and violent changes incident to the use of former machines having intermittent motion, avoids the noise and the strain on the parts due to a violent starting and stopping, and avoids the risk, hitherto serious, of a'slipping of the paper, and inducing irregularities in the size of the sheets by the feed-rolls commencing to move beforethe sheet starts and stopping their motion before the sheet stops.

Second, the fact that the continuous rotation of the cutter-shaft B communicates motion through the crank B2, pin B3, and connection D to the segment E gives a reciprocating rotary motion to the feeding-drum G and its connections with very simple mechanism, and with a facility for adjustment by moving the pins B3 and E', which'allows the length of the sheets of paper to be varied at will within wide limits.

Third, the friction-pawls G3 and their coni nections, arranged as specified, transmit the forward motion from the wheel F and sleeve F tothe feeding-drums G and H with sufficient power and with great certainty, and

very quietly. They also allow the length of the paper cut off at each rotation of the knife b to be varied by as small amounts as may be required, which could not be done with pawls operating on teeth, or by any other ordinary device.

Fourth, the gravity knock-oft' or peudulous piece C yields very readily to a gentle force impressed by the knife b, yet throws the paper forward with great certainty so soon as the knife has passed.

Fifth, the spring K aids the forward motion of the reciprocating feed G H, using for the purpose the power which it has accumulated during the period while the paper is stationary.

Sixth, the friction-brake M destroys the rotation of the feeding parts G with great geutleness and irmness, and holds the parts in any position in which they may be stopped, the paper to form sheets of various lengths.

Seventh, the spring J urges the brake M to its work with great promptness, and holds it with sufficient firmness, even though the wear of the rubbing parts may induce a considerable variation in the positions in which it comes to rest at different periods.

Eighth, the catch N holds the brake M open without entailing any friction or wear on the machine, and by the tiling or otherwise adjusting of the edge by which it holds on M may allow the liberation of the brake M with great promptness at any desired point.

Ninth, the detaching-cam B5 and bent top or inclined surface n, operati u g together, as specified, detach the dog N with certainty at the proper period without complex mechanism.

Having now fully'described this invention, what I claim as new, and as the invention of the said BEGKWITH, is as follows:

l. The combination, in a paper-cutting machine, of a gradually-starting and graduallystopping intermittent feed mechanism with a revolving knife, substantially in the manner and for the purposes specified.

2. The within-described arrangement of the revolving knife b, crank B2, connection D, segment E, and intermittent feeding-drum G, substantially as and for the purpose specified.

3. The friction-pawls G3, arranged, substantially as specified, to transmit mot-ion from the sleeve F', revolved alternately in opposite directions, to the feeding-drum G of a papercutting machine.

4. The pendulous piece C, arranged relatively to the knives a and b and to the intermittent feeding mechanism G H, or its equivalent, in a paper-cutting machine, substantially as and for the purpose herein specified.

5. The spring K, arranged as specified relatively to the intermittent feeding mechanism E F G and their connections in a paper-cutting machine.

6. The friction-brake M and spring J, or its equivalent, in combination with thedepressingarm B4, with a rotating cutter, b, and with the wheel G and drums G H of an intermittent feed in a paper-cutting machine, substantially as specified.

7. The within-described arrangement of the spring J, brake M, wheel G', and the connected parts of an intermittent feed in a paper-cutting machine, substantially as specified.

8. The catch or dog N, with a releasing device therefor, in combination with the brake M, spring J, and suitable means for depressing the same, and the intermittent feeding-drums G H, or their equivalents, in a paper-cutting machine, as specified.

9. The detaching-cam B5 and surface n, arranged relatively to the cutting-shaft B, catch N, brake M, and wheel G of an intermittent feed in a papercuttng machine, substantially as specified.

WVM. SMITH, Exeeutor of the estate of Enos l. Beckwith, under his last will amt testament.

Vitnesses:

GEO. M. CLARK, SAM. BINGHAM.

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