US213535A - Improvement in printing-presses - Google Patents

Description

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R. J. STUART.

Printing-Press. No. 213,535. Patented Mar. 25,1879.

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Printing-Press. No. 213,535. Patented Mar. 25,1879.-

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NITED STATES PATENT OFFICE ROBERT J. STUART, OF YONKERS, NEW YORK.

IMPROVEMENT IN PRINTING-PRESSES.

Specification forming part of Letters Patent No. 213,535, dated March 25, 1879 application filed November 16, 1877.

To all whom it may concern:

Beit known that I, ROBERT J. STUART, of

Yonkers, in the county of Westchester and tion. Fig. 2 is aver-tical longitudinal section.

Fig. 3 is a rear elevation; Fig. 4 a front elevation.

The remaining figures are detail views, and diagrams illustrating the operation of various parts of the press, and which will be referred to in the body of this specification.

. The invention is shown as applied to a press having a vertical type-bed for receiving the form of type, and a platen, which oscillates to and from said bed.

The pile of sheets is supported -on a horizontal table or platform, which is pressed upward by a spring tending to keep the top of the pile against a transverse stationary bar situated immediately above said table. The table is located behind and lower than the platen. A frictional rubbing-bar rests on the top of the pile of sheets toward the front edge thereof. A laterally-vibratingmotionbeingimparted to this bar by appropriate mechanism, it draws the front edge of the top sheet from under a pressure-plate which rests on the front of the sheets. The edge of this plate, which rests on the pile, being beveled, the edge of the sheet passes over said plate on being brought forward by the rubbing-bar, and is held in position to be grasped by the jaws of vertically-oscillating nippers, which descend and close upon it. At this juncture the table is depressed, and the nippers carry o the sheet and hold it suspended between the platen and bed of the press while it receives the impression, which taking place, another pair of nippers seize the top edge of the sheet and take it to the piling-table, where it is properly deposited.

In the drawings, A represents the framing ofthe machine; B, the type-bed; C, the platen; I), the platen-arms, pivoted at E. F is the driving-shaft; Gr, a pinion thereon, which gears with the wheel H on shaft I, to the opposite extremity of which is secured the cam-disk J. K are links pivoted at one end to the platenarms, and at the other to the gear H and disk J. Thus, as the shaft I revolves, the platen is oscillated to and from the type-bed B. L is the ink-fountain, secured to the side frames, as shown. In it revolves the fountain-roller M, having its bearings in journal-boxes N sliding on the ends of the fountain, and set up to the knife-ed ge or doctor O by thumb-screws P.

Q is the distribution-roller, which is directly on the driving-shaft F, or is an enlargement of the same. B is the roller journaled in oscillating arms S, whereby it may be thrown in between said fountain and distribution-rollers, thus forming an intermediate connecting-roller.

U is a traversing roller for distributing the ink on the distribution-roller Q. (See Figs. 5, 6, and 7.) It is a sleeve which revolves and slides on the rod V, supported immediately over the roller Q by the bar W, which is pivoted at its middle to a projection, X, from the back of the type-bed B.

From the bar W project upward two tappets, Y, one on either side of the pivot on which the bar W works. On the shaft I are two projections or toes, Z Z, which, as the shaft revolves, come alternately and respectively in contact with the tappets Y, thereby rocking the bar on its pivot.

The point at which the bar W is pivoted being in a line which intersects the axes of the rod V and roller Q, and being vertical to a horizontal plane, as the bar is oscillated each extremity of the rod is carried alternately from side to side of a vertical plane passing through the axis of the roller Q, so that it forms angles with such plane. Ahelical motion is thereby imparted to the sleeve-roller U, the direction and velocity of its advance along the rod being dependent on the position of the bar W relatively to the direction in which the roller Q is revolving and the degree of the angle which the rod makes with the roller, as before stated.

a are arms, secured to the extremities of a shaft, b, journaled in the offsets c from the frame A. From the free ends of these arms are jointed the suspending-rods d, which carry at their lower extremities the typeinking rollers e. The arms are oscillated by the cam f on the inside of gear H, acting on an anti-friction roller, g, on one of the arms a. h are springs, which tend to keep the rollers against the face of the type. The oscillation of the arms a carries the rollers over the form and down to the distribution-roller Q, from which they receive their supply of ink.

The following is a description of the mechanism for automatically separating and feeding the sheets from a pile, and for piling the printed sheets: 'i represents the table or pla-tform on which the pile of sheets is placed. (See Figs. 2, 4, and 8.) It is capable of a vertical motion, being guided in grooves j in the side frames, into which grooves the pieces k, projecting from the under side of the table, enter. Z is a rod depending from the under side of the table, and passing through a hole in the guide m. n is a coil-spring surrounding rod l, and tending to force the table upward. 0n the inner side of the pieces 7c are the ratchet-racks o, with the teeth of which the detents p on the extremity of the arms q engage. The arms q are on the shaft r, to one extremity of which (outside of the side frame) is secured the arm s, (see Fig. 1,) provided with anti-frictional roll t, running against the edge ot' cam J. Thus as the shaft ris rockedby the revolution of cam J the table t is depressed at the proper moment. u is a stationary bar, secured to the side frames, and situated directly above the table. The spring u presses the table i or the pile of paper thereon against the bar u, which thus clamps the paper down on thetable. From thebar uprojectthe guides or gages fv w for keeping the paperin its proper position on the table. The detent p slides between the jaws on the extremity of arm q, and is pressed outward by the spring w. The lowest point of the motion of the arm q is fixed, being determined by the cam J. The extent of its motion upward is, however, dependent partly on the height of the pile of paper. It is not, however, dependent on the total height of the pile, but on the successive sections of the pile, equal in thickness to the distance between the ratchet-teeth.

Itis obvious that, the straight line in which the edge of the rack-teeth moves being secant to the arc of a circle in which the point of the detent moves, the gradual rise of the table will ultimately bring any tooth on which the detent may rest beyond the range of the detent, which then falls on the tooth next below.

y is a horizontal plate, supported upon short rods z, sliding vertically in the guides a2, secured on the transverse bar b2. One edge, c2, of plate y is beveled, as shown in Figs. 2 and 11, and, when not elevated, rests on the table i. d2 is a curved lever, pivoted at e2, onel end of which is bent horizontally at right angles and extends underneath the platey. The other extremity is provided with an anti-frictional roll acted on by the cam f2, Fig. 3. Thus as the cam revolves the plate is raised and lowered from and to the sheets. Whenthe edge of the sheet is about to be passed over the edge of the plate it (the plate) is held firmly down on the pile of sheets by the weight of the lever resting on the pin g2, projecting from the guide h2. i2 is the frictional rubbing'bar, to which is imparted a laterally-vibrating motion for separating the sheets. (See Fig. 10.) lts extremities rest in the slots j, cut in the vertical limbs of theleverslc2,pivotedat l, on eitherside of the frame. One ot' these levers (the one shown in Fig. 1) is bell-cranked, and the under edge of its horizontal limb is shaped with undulations, and rests on a stud or anti-frictional roller, m2, projecting from the platen-arm D, so that as the platen-arm rocks to and fro a vibrating motion is imparted tothe levers, the number of such vibrations being dependent on the number of undulations on the arm.

The lower edge of the bar 'itis provided with a covering or strip of india-rubber or other frictional material, yand rests on the pile ot' sheets at a point between the .plate y and bar u. n2 is aroller parallel with bar il, the ends of which take into slots o2 in the lever 7a2, which are cut at an angle to those in which the bar i rests. This roller rests on the pile of sheets. As the levers are vibrated the rubber i acts on the top sheet of the pile to draw it from under the plate y and carry it backward, the sheet forming a bend or arch between it and the roller n2. Although not absolutely necessary it is preferable, especially with poor quality of paper, to increase the distance between the bar i2 and roller n2 as they move backward, or, in other words, to accelerate the motion of the roller. To effect this the slot o2 is `cut at an angle to the slot jt, so that, as the arms k2 move back, the roller n is forced up the slot, and its motion is thus accelerated. On each end of the roller n2 .is a lever, p2, one end ot' which passes vunder the rubbing-bar iz, the other end carrying the sliding weight q2. By moving this weight along the arm the pressure with which the rubbing-bar presses on the sheets is regulated.

m1 are arms secured on the shaft nl. The outer ends of these arms are connected by the rod o, carrying the nippers pl. From the platen is a projection carrying the-roll q1, which as the platen rocks acts against one of the arms ml to raise or lower the nippers which movel between the platen and bed of the press. r2 are curved arms secured to the extremities of the shaft s", having bearings on the oisets tzfrom the frame. The upper extremities of the lever s r2 are provided with roll u2, acted on by the cam 'v2 on the shaft I. To the lower ends of the levers r2 are jointed the rods wz, which extend upward and take the extremities of rod m2 is guided in the guide-slots z2 on the upper part of the frame.

Both sets of nippers are constructed as follows, the upper pair 'bein g taken for description: On the rod'` ais the sleeve a3, which carries at its end contiguousto the frame an arm, b3. from which a stud, o3, projects into the slot z2 in the f'rame. To the other extremityof the sleeve, situated about midway of the rod, is secured one jaw, d3, of the nippers, and on the rod a? is the other jaw, e3, the two working together, as shown, Fig. 2. The jaws are kept closed by the spring f3, andare opened by the tappets g3 h3. rlhe one g3, actin-g on the head of the connecting-rod K, opens the yjaw e3 from the jaw d3, which is held stationary by the arm b3 in the slot and h3 acting to .hold the jaw stationary by coming against the stoppin i3, while the arm b3 opens the jaws by its stud entering the bend 'in the upper end of the slot z2. The lower or feeding nippers are similarly constructed to those just described. They are operated to grasp the sheet by a tappet, jg, secured to the `rod o, coming in contact with aprojection, 7c3, on the arm d2, which opens theln.

As the arm is lowered the nippers are closed on the sheet, and when in position to deliver the sheet to the upper or delivery .nippers they are opened by the tappet jf coming in contact with the arm Z3, which is at the same time moved forward by cam J.

m3 is the table on which the printed sheets are delivered and piled. It is situated above the feedingtable in alniuclined position, as shown, Fig. 2.

n3 are bars for supporting the rear edge of the pile, which bars form an angle with the table m3. o3 are guides project-ing downward from the adjustable rod p3 onto the table and parallel with the rear supports ai. g3 are side gages adjustable on the rod p3.

The point at which the top edge of thesheet is held by the feeding-nippers p1 to be taken by the delivery-nippers y? is fixed and invariable, while that at which the paper is held when the impression is taken may vary. This i adjustment is effected by the supplemental arm r3, which can be set down by the setscrew s3, so that it shall project below the arm ml.

The point t3, Fig. 17 on the arm mi, determines the position of the nippers p1 when the sheet is taken by the delivery-nippers y2, while the end of the arm r3 -will determine their position when the impression is given.

It is often desirablein starting the press, to allow two or three revolutions to take place before feedingthe paper. To eect this an arm, u, of the shape shown, Fig. 18, is pivoted to the side frame and provided with astoppiece, fu, which, when the arm is raised and supported on the catch w3, extends across the slot z2, and thereby prevents the deliverynip pers from descending.

The descent of the feedingnippers is prevented bythe stop w3, projecting from the arm m1 aud resting on the arm us. The nippers thus retain the sheet for a succession of impressions, thus saving the tympan-sheet.

On referring to Figs. 12 and 16, it will be seen that the sleeve carrying' the :nippers p is provided with a stop, 9, acting against the arm m1, being kept against it by a spiral spring, 904, wound around the sleeve, one extremity, 8, of which is fastened to the arm. The effect of this construction and arrangement is to make the nippers assume the position sho'wn in Fig. l2 when they are at the upper end of their stroke-that is to say, their lower extremity stands oft' from the bed of the press. Now, as theplaten approaches the bed to give the impression, it comes against these nippers and presses them in against the bed, as seen in dotted lines in Fig. ll, and as the platen recedes the spring x4 throws out the nippers, thus stripping the sheet from the type.

` I amaware that nippers have been used for stripping off sheets of paper from a form of' type, but know of no instance in which they have been operated by the platen of the press, as just described.

The parts being constructed and arranged as described will operate as follows: The operation of the hiking-rollers being generally well understood, the foregoing description will suffice to render it obvious. The platen being at its farthest point from the bed', the revolution of the shaft I in the direction of the arrow will commence to drawit to thebed. The stud m2 on the platen-arms will thenact against the horizontal limb of the lever 7a2, and by the undulations thereon will impart a vibratory or laterally-reciprocating motion to the rubber bar 'i2 and roller n2. Each forward movement of this bar draws the top sheet of paper from under the plate y, and as the bar t? moves forward the plate y is elevated fromthe paper by the cam f2 through the arm d'so that the sheet is each time returned under the plate until the nippers descend to take the sheet, when the plate y remains on the pile, and on the forward movement of the rubbing-bar the edge of the sheet passes over the beveled edge c2 ofthe plate. The sheet is now in position to be taken by the feeding-nippers p1, which descend as the platen opens by the action of the stud or roll q1 on the platen. A On arriving at the sheet the nippers grasp it, as before described, and the tablet' is depressed by the cam J, which thus leaves the sheet free to be taken away by the nippers, which, ascending as the platen closes to the bed, carry the sheet upward to the point where it is to be suspended for the impression, which having been accomplished the platen commences to open, and the delivery-nippers descend and seize the top edge of the sheet and hold it stationary, while the feedingnippers riseabove the edge ofthe sheet; then, by the contour of the lower extremity of the slot z2 and the movement of the pitman-head K, on which the arm g3 rests, the nippers turn out or toward the platen to clear the sheet of the feeding-nippers p', which about this moment commence their descent, while the delivery-nippers ascend and carry the sheet to the delivery-table 'm3, where it is deposited between the guides.

With some kinds of paper it is unnecessary to move the rubbing-bar backward more than once, that motion being sufficient to separate the sheet properly. To eiiect this the oii'set or undnlations z3 on the arm k2 may be removed, and as under such conditions it will be unnecessary to elevate the plate y, the cam fl operating it may be thrown to one side of the roller on the arm d2.

The press may be fed by hand by taking out the bar i2, roller n2, and bar u, the sheets being fed singly up to the stops y* on the plate y, Fig. 11.

I claim- 1. In a printing-press, the combination of a platen, C, bed B, mechanism, substantially as described, for separating the sheets from a pile ot' paper, and nippers for taking the sheet from the separating mechanism and suspending it between the bed andV platen to receive the impression, constructed and operating substantially in the manner described and specified.

2. In combination with the bed and platen and the feed-board situated below said bed and platen, the nippers p1, for taking the sheet from the feed-board, rising with and suspending it between the bed and platen, and the nippers y2, for taking the sheet from the nippers p1 and conveying it upward and to the pilingboard m3, constructed and operating substantially in the manner described and speci- 3. The combination of the separating mechanism, substantially as described, to separate the sheets from a pile, the nippers p1, for taking the sheet so separated and suspending it between the platen and bed, and the nippers y2, for taking the printed sheet from the nippers p1 and carrying it to the piling-table m3, constructed and operating substantially in the manner described and specified.

4. The method herein described of separating sheets of paper from a pile by clamping the front edge of the pile under a yielding clamp, substantially as described, and then with africtional rubbing-bar acting on the top of the pile to draw the top sheet from under the clamp, and then raising the clamp and returning the sheet or sheets under said clamp for a repetition of the operation, whereby the perfect separation of the sheets is eii'ected, substantially in the manner described and specified.

5. The combination of the levers k2, rubbing-bar i2, and roller n, situated behind said bar in the inclined slots in the levers k2, constructed and operating substantially in the manner described and specified.

6. The combination of the bar W, rod V, roller U, tappets Y Y, and projections Z on shaft I, constructed and operating substantially in the manner described and specified.

7. The combination of the nippers p1, arm ml, arm r3, adjusting-screw s3, and projection from the platen q1, constructed and operating substantially in the manner described and specified, for adjusting the position of the nippers p1 when the impression is taken.

8. The combination of the arm ua, arm lm1, provided with projection w3,`nippers p, and catch a", for arresting the descent of the nippers, constructed and operating substantially in the manner described and specified.

9. The combination, with the delivery-nippers and their shaft running in the slot z2, of the arm n3, provided with projection v3 and catch m3, constructed and operating substantially in the manner described and specified.

ROBERT J. STUART.

Vitnesses:

E. H. J oHNsoN, ALFRED SHEDLOCK.

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