US41862A - Lithographic-printing press - Google Patents

Description

' 2 Sheets-Sheet 1x.v

'En REYNOLDS. LITHOGRAPHIG 'PRINTING APRESS.

Patented Mar, 8; 1864.

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f E. REYNOLDS. A LITHOGRAPHIC PRINTING PRESS.

vPatented Mar. 8, 1864 UNiTnnl STATES PATENT OFFICE.

LITHOGRAPHlC-PRINTING PRESS.

Spccilication forming part of Letters Patent No. 41,862, dated March 8, 1864.

To aZZ whom it may concern: l

Be it known that I, EDWIN REYNOLDS, of Mansfield, in the" county of Tolland and State of Connecticut, have invented Improvements in Lithographie Power-Presses; and Ido hereby declare that the following, taken in connectionwith the drawings which accompany andform part of this specification, is a description of my invention, sufficient to enable those skilled in the art to practice it.

These improvements yrelate to and are applicable to all lithographie power-presses employing a revolving tympan and a traversing stone;` and my invention consists in the manner of operating'the tympan with respect to the-movements of the bed which carries thel stone; also, in the mechanism for removing the printed sheet from the tympan; also,in an improved construction of the damper.

My improvements are shown in the accompanying drawings as embodied upon a lithographic power-press similar in its general construction and operation to the press patvation of the press. Fig. 2 is a sectiontaken on the'lixie .c w of Fig. 1, and so as to show, in

connection with Fig. 1, the relative position of the parts which operate the4 movable tooth ofthe tympan-gear. Fig. 3 is aview'in detail of the mechanism for imparting the endwise movement to the rollers. Fig. 4 shows the mechanism for removing the sheet from the tympan. Figs. 5 and 6 denote, respectively,' a bottom view and cross-section, on a scale of h alf the size of the .other figures, of the bed and gearing for adjusting the stone.. Fig. 7 is across-section of the damper. f

a in the drawings denotes the frame-work of the machine; b, the stone, fixed upon a bed, c, which is supported on a carriage-bed, d,

' said carriage-bed being propelled by mechan ism as seen in the drawings, or in any other suitable manner, to carry the stone successively into operation with the ink-rollers, the damper, andthe revolving tympan. Agca-r,- e, is applied to eachend of the tympan-frame, said gear meshing into and being rotated by a rack, f, on each side of the carriage d. This tympangear is cut away on one side, and to this portion the movable tooth g, with its pin Sis applied so as to slide in the face of the gear and into and out of operation with the rack f, asin said Patent No. 37,727. The manner of and mechanism for operatingitl will now proceed to describe.

The lower end of the vertical llifter-rod h,

which moves the tooth up into the gear, is hung or jointed to the'end of an arm, i, xed upon a rocket-shaft, k. The driving-shaft l carries a pinion, m, which rmeshes into and drives a gear, a, as denoted by red lines in Fig. 1. The shaft o of the gear n carries the crank-wheel p, which, through connecting rods or 1inks,pdrives the truck-frame of the carriage d, so that at each revolution of the gear the carriage completes its reciprocal movement through the frame a. To one side of the gear n acam, q, is applied, said cam extending half-way around the circumference of thegear-wheel n, as seen in Fig. 1. A short arm, lr, fixed upon the rocker-shaft k, bears a friction-roller, s, which works upon the surface of this cam. The gear rotates in the direction denoted by the arrow thereon, and

- during half its revolution its cam operates on the roller s. When the point tof the cam reaches-the roller, the carriage d will have completed its return movement withoutrotating the tympan, and as the cam passes the roller a spring, y, draws down the lever h and brings the tooth g into gear with the rack, so that as the gear continues its rotation and carries the stone forward under the tympan the tympan-gear e and tympan revolve, and the sheet is printed. .l

As the'oppositepoint, u, of the cam strikes the roller it lifts the arm r, turns the rockershaft k, lifts the arm i and rod 71 and carries the'toothout of gear, sothat as the carriage and stone traverse back under vthe tympan said tympanis out of'gear with the rack.- By operating the tooth in this manner its movement to and ont of the rack is made positive and always certain when the press is so arranged as to make it desirable to pri nt at every .forward movement of the stone.

A projection, h, 'is made on the back ofthe rod h at some distance below the line of rotation of the pin t* of the sliding tooth. Just above this projection, or so as to pass above it when the rod is depressed, are two pins, k, extending from the face of the tympan gear. When the rod is raised so as to carry the tooth outof gear with the rack, the projection h* comes between the pins 7a* and locks the gear in position, preventing any movement of the tympan which might take place by contact with the stone or otherwise when the tooth is out of gear with the rack and the stone is on its return movement under the tympan.

It is sometimes necessary or desirable to canse the stone to make a number of successive reciprocal movements under the tympan without printing-as in adjusting the stone, and for other reasons; and to accomplish this without imparting any movement tothe tympan I apply a stop mechanism as follows: A hand-lever, o, turning in abearing, w, extending from the frame a, carries a catch, a2, which extends through the frame a. and against or so as to slip under the rocker-arm t', which actuates the tooth-rod h. 4When I wish to run the press without the movement of the tympan, I allow the catch to slip under the arm t', and this holds the tooth above the rack, a spring, g2, Vor other means serving to keep the catch under the lever until such time as I wish the tympan again to operate, the catch keeping the roller s from dropping as the cam q passes it, as will be readily understood. In the 4usual operation of the press the lever o is held out, so as to keep the catch-pin from slipping under the rocker-arm, in any suitable,

at each double revolution of the shaft o with its pinion c2, gear n, cam q, and crank-wheel p the gear d completes one revolution. Upon the shaft et of this gear d2 is placed a cam, f 2,

which is so applied by means of a set-screw or otherwise as to be capable of being moved laterally on the shaft to carry and tix the cam Vunder the rockerarm il or away from and inoperative wil-h respect to it atpleasure. The cam is so formed that when under the arm 'i it shall lift the arm as it rotates, and shall keep the arm@ and the tooth-rod h elevated and the movable tooth out of the rack during one forward movement of the stone, and at such time as the revolution of the cam q would otherwise allow said tooth to be in gear with usual. As the point t of the cam q passes the roller s 'the cam f2 comes under the armil and prevents the tooth from dropping into engagement with the rack, and keeps it up while the stonenext moves forward under the tympan, keeping the tympan inoperative until the cam q again comes into action with the roller s, and keeps the tooth out of the rack during the return movement of the stone, and as the stone next moves forward the cam f 2 is out of contact with the arm i, and the tooth g falls into position to mesh into the rack and cause the tympan to revolve, thus operating the tympan at every other forward movement of the stone. When it is desired to print at every movement of the stone, the cam di is slipped on the shaft, so that its surface shall not operate on the rod.

The mechanism for taining the paper from the tympan-frame is as follows: To the posts g2, which support the feed-board, are fixed parallel ways k2, running from near the .opposite ends of the tympan-frame, and in these ways a sliding nipper frame or carriage, i?, moves,

the opposite ends of said carriage being connected by a bar or rod, k, and by one of the rods Z`l of the nippers. The upper nipperjaws, inz, are fixed immovably on the rod Z, with respect to the carriage, and to the lower nipperjaws, n2. rlhese jaws n2 are applied to across-shame?, rockingin bearings p4 Springs (not seen) tend to keep the jaws mi and 'n2 apart, the extent of movement of the jaws being fixed by'a projection, r2, on each end of the shaft o, which abuts against the short arln of a swinging lever, s, depending from the sliding frame i2. Cords t2, running from the frame i, pass around grooved pulleys u2, turning loosely on shafts affixed to projections from the frame a of the press. These cords have weights c? at their lower ends, by which the sliding frame is drawn vup into juxtaposition with the tympan. When the truck-frame and bed are traveling back after a sheet has' been printed, the weights draw the nipper carriage after it until vertical bearing-plates a3 of said nipper-carriage strike against cams b3 on the ends of the tympan'frame or on the inner faces of the tympan-gears. Each of these cams extends partially around the circumference of the gears, as seen inMFig. 4. As the stone next moves forward under the tympanv the cam b3 keeps the nippers in position seen in said Fig. 4, and the cam passes the plates as just in time to permit the nipper-frame to nieve forward alittle and let the ends ofthe upper nipper-jaws slip into the depression o3 of the tympan-frame, `and under the edge of the paper, or between such edge and the tympan-frame, the gri ppers d of the tympan-frame releasing their hold upon the paper at the same time in the usual manner and by mechanism which it is therefore not necessary to describe. As the carriage and stone continue their movement under the tympan a pin, c, from the rack frame or car riage d strikes the lower arm of the swinging lever .5, tipping said lever in such manner as to cause its upper arm to turn the projection r from the shaft of the lower nipperjaws, and force the-nipper jaws u? against the upper jaws and pinch or grip the edge of the sheet between them. The continued movement of the-carriage d keeps the nippers in this position, and slides back the Dipper-frame with the printed sheet. As the carriage d draws near the end of its back movement the lower ends of the levers s2 strike upon a stationary-projection, f, on the frame a, and, stopping said lower end, the movement of the carriage and the pins eq causes the upper ends of `the levers to draw away from the projections r" of the shaft of the lower Dipper-jaws and releases the paper from the grasp ot the nippers. The pressure of the pins 63, after thelevers sIl strike the projections f3, accelerates the movement of the Dipper-carriage,

' causing the nippers to draw away from the edge of the sheet-s, and allowing thev sheet to fall and be removed from the machine in any convenient man ner. As the stone returns the nipper-frarne follows after and assumes the position abovedescribed, in readiness to take the In adjusting thestone for the impression, in order to produceuniform rise or descent of all its partsor to preserve the parallelism of its surface tot-he lower bed, I provide the upper bed, c, which carries the stone, with four screwbearings or nuts, g3, which are placed at or adjacent to the opposite corners of the bed o,

and have .vertical screws i3 working therein.`

The lower ends of these screw-shafts are supported in bearingplates h3, and have wormgears fixed on them, which mesh into and receive motion from worms h5 on two horizontal ism is preferable to the use of wedges for raisingand lowering or adjusting the stone on account of the greater ease and precision of the movement.

Above the inkingrollers p3, which run over or in contact ,with and to ink the surface of the stone, I hang two metallic rollers, Q3, in sujcli manner that they shall rotate with and impinge against the surface of the inkingl rollers. The purpose of these rollers is to press upon and smooth the surface of ink on the inking-rollers after they have been-in contact with the stone, their action serving to smooth the ridges and channels made by the unequal quantities of ink removed by the stone from different parts of the rollers, and

at the end of each movement of the carriage d I impart aviloratory movement to the two oppo- .site or outer ink-rollers,as follows: A vertical rocker-shaft, r, turning in bearings affixed to the frame a, carries at its upper end a rocker-bar, s, from the opposite end of which pins t" extend upward into' grooves a3 in collars y on the shafts of the ink-rollers p, as seen in Fig. 3. An arm, c3, extends in from the 4shaft r in such manner that as the carriage d is terminating its forward or return movement the end of the arm isstruck by a dog or.

pin, x3, extending from the carriage, causing the arm to swing, and therebythe pins t3 to move the two rollers p3 in opposite directions. By this means I distribute the surface of the ink on the rollers after each passage of the stone. f

The manner of supplying theink to the roll ers forming no part of my present invention, I have not shown or described it, as any of the 4well-known methods may be employed.-

making thedamper with the folds the quantity of water exuding from each fold can be regulated by packing of the sponge or otherwise, and the pressure and moistening power of the different folds varied as desirable.

The water may be fed to the damper in any desirable manner.

` .Although, to illustrate the operation of the -machine as shown in the drawings, I have del scribed certain mechanism for-releasing the paper from the grasp of the nipper-jaws, and a method of imparting a vibrating motion to the ink-roller, as also a combination of metal.

surfacing-rollers with theink-rollers,I do not claim anything therein yas my invention neither do Iherein claim the method described of raising, lowering, and adjusting the stone.

Having thus described my improvements,

lwhat I claim is as follows:

. 1. Impart-ing the upward motion to the movable tooth g by means of the rod h, arm i, rockershaft k, arm r, and cam q, operating together in the manner substantially as described.

2. The combination of the rod h, lever o, catch a, and arm i, for entirely arresting the descent of the tooth and the operation of the tympan, as set forth.

3. The combination of. the pins k* and projeetlions h, operating together, substantially (i. Constructing the stationary damper with ns described, to lock the tympan in position folds, in the manner and for the purpose subwhen the movable tooth is outI of gear with stnntinlly as described.

the rack. In testimony whereof I have hereto seb my l: 4. The combined operation ofthe cams q signntnreihis 28th doy of October, A. 13.1863.

:indf2 for controlling the arrest of movement ofthe tympan, substantially as specified. EDWIN REYNOLDS.

5. Operating the nipper-jmvs n? mi to close them and cause them to removeihe sheety from Witnesses:

the tympan-frame by the combined fiction of J. B. CROSBY, the pin-e, lever s?, und projection f. F. GOULD. 4

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