US22519A - Press - Google Patents

Description

STAIEES GFFICE VVMl H. S'ILUBBE, OE BOSTON, MASSACHUSETTS.

Specification of Letters Patent No. 22,519, dated January 4, 1859.

To aZZfwhom tf-may concern;

Be it known that I, WAL H. S'iuisn, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and Improved Lithographic-Printing Press, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification, in Wliich- Y Figure l', is a. plan of my machine. Fig. 2, a vertical section throughl the same. Figs. 3, d and 5. details to be referred to hereafter.

hfy invention has foi' its object to. perform the operations of inoistening and inking the stone, and. of tak-ingV the impression upon the paper all by machinery and myinveiition consists in an automatic machine for the purpose of effecting the same which lf will now proceed particularly to describe.

The lithographie stone X3 is secured to the top. of the carriage A and is raised to the required height by the introduction of boards or paper beneath it in the customary manner. The carriage is vibrated back and forth as folloivsfeSiX flanged Wheels B, the

axles. T, T", T2, ofwhich are connected' byv the perches R, run upon rails C, andv are traversed back and -forth byv the connecting.`

rod Dr, and crank E, upon the driving shaft F. Uponv the center of the shaft- T is a gear Gn, which` engages With a stationary rack H, and a corresponding rack K, upon the bottom of the traveling carriage A. To each end of this carriage are secured: timbers W, which rest upon the treads ofthe flanged Wheels B', and.: thus by means of the gear Gr, and racks H and K, the carriage is traversed both forward and back a distance equal` to double that moved by the Wheels B. As the carriage with its stone thus. traverses backand forth the operations of 'iviping (moistening) iiiking, and printing are performed in succession as follows-The Water for inoistening thev stone is contained in the trough I, from Which it drops through the funnel a, into a receiver I), there being a funnel and receiver upon each of the ends of the shaft of the inoistening roller L; the shaft c, of this roll is made of copper tubing into which the Water is admitted from the receivers I); this tube c, is pierced With holes to4 permit the Water to flow through and saturate a covering of sponge (l, Which surrounds itfoutside the sponge is a covering f of fiannel and surrounding the Whole are one or more thicknesses e., of cotton or linen lit, and is raised. and lowered with it. ithe carriage moves inthe direction of its cloth. As the carriage moves in the. direc- ,tionV of its arroivv the surface of the stone .bears against the inoistening roll andthe stone is wiped as required the roll being revolved by the contact ofthe stone.

For the purpose of taking up the supervfluous water from the moistening roll- L, an :absorber M', of sponge or other suitablev material is placed immediately to the rear of Then arrow the moistener and absorber are alloived to drop upon the surface of the stone, ibut when the carriage returns in the opposite direction after the stone has been inked lthe inoistener and absorber are raised clear of the stone by means not shown in the drawings, they are seen elevated in Fig. 2,

The absorber M iii addition to taking up the superfluous Water of the moistening rollr ,serves also to Wipe the advance and rear 4edges of the stone for the purpose of preventingl them from taking ink as they pass the ink rolls. At Z, Fig. 2 is seen one of A,tivo Wipers Which are saturated with water vand serve to moisten the side edges of the ystone and in a similar manner prevent them` 1 from taking ink, they are carried by a trans- `verse rod upon which they may be adjusted in position to` suit stones of various Widths. jAs the carriage still moves in the direction @of its arrow Fig. 2, the stone is inked as folloWs-Jlhe ink is contained Within the trough N from which it is transferred by fthe rolls S, and O, to the vibrating distrib- -uting cylinder Q, bywhich the ink rolls R are served, and in contact With these latter the stone X3 oii the carriage A passes twice, once as it advances and again on its return- `the roll S, is driven by a cord' Y, from the main shaft F. P is a shaft on which the arms thatcarry the roll O, are hung. I `will noiv describe the manner in which the rollers, as seen in Fig. l. Upon each end of the shaft- X, is a gear C2, which is revolved by racks D2 upon the carriage A, one of the racks being seen in Fig. 2-to each of these wheels is connected one end of the metal plate B2 and thus as the gears C2 are revolved the plate is carried around the drum and with it the tympan and nippers. This revolution of the gears, plate and tympan takes place only in one direction, while the carriage is running back after the ink has been applied to the stone. Then the carriage advances after an impression has been taken the racks D2 are disengaged from the gears C2 so that the latter remain stationary in the following manner. A portion of the teeth of the gears C2 are cut away at l0 Fig. 2, so that on the arrival of the nippers g into position to receive a sheet of paper the toothless portion of the gears shall be opposite to the racks D2 and the parts remain in this position until after the stone has again been inked and returns to give another impression. The motions of the gears C2 during this part of the operation are governed as follows: One of the gears G2, carries upon its outside face and directly over the part where the teeth are cut away a pin a2, which at certain times enters a notch in the end of a lever E2, pivoted at b2 to the framework. The position of this lever is governed by two corresponding cams f2 seen detached and in elevation in Fig. Ll, and which are set counter to each other upon the shaft F, these cams are partly concentric and partly irregular so that motion is imparted through the rod F2 to the lever E2, as follows: As the gear C2, revolves the lever E2 is thrown by its cams f2, into the posit-ion seen dotted in Fig. 3, and the pin a2, falls into the notch in its eX- tremity-the cams f2, are so shaped that the ylever E2, follows the motions of the pin until it arrives into the position seen in black in Fig. 3, when the toothless portion of gears arriving opposite to the rack the gears remain stationary while the carriage completes its motions. At the same time the cams f2 being both concentric the lever E2, is held stationary and the gears with the tympan are held for the time immovable and before they can be again set in motion the gears must be revolved sufficiently to engage them with the racks-this is effected by the cams f2 which now move the lever E2, in the direction of its arrow into the p0- sition shown in red Fig. 3, until the gears and racks once more engage, when the former are caused to make another revolution as before.

It now remains to be shown how the nip pers g, are opened and closed. Their movable jaws are attached to a rod 2 which is connected by a jointed arm g2 with a pin Z2 that passes through a slot in one of the gears C2 and rests upon the periphery of a cam G2 Fig. 3 that is loose upon the stationary shaft X, this cam is concentric and of such a diameter from 1, to 2, that the nippers are allowed to remain closed, but on the pin ascending the eccentric portion 2, the nippers are opened and remain so until just before the gears C2 and tympan commence again to move, when the cam G2, receives a motion in the direction of its arrow suflicient to allow the pin Z2 to be drawn down upon the cam at l, by a spring 15, Fig. 5, whereby the nippers are closed, ready to make another revolution. This motion of the cam G2, to close the nippers is effected as follows: H2 is an arm attached to the cam and connected by the link 12 to a bell crank lever K2 pivoted at n2, to the other arm of the lever K2, is attached the pendant bar L2 which is raised and lowered for the purpose of imparting the required movements to the cam G2 by a switch l 2, upon the side of the carriage. A pin e2 upon the end of the bar L2 passing out of the switch beneath the spring /L2 and thus moving the cam and closing the nippers and on the arrival of the carriage at the other end of its traverse the pin e2 enters the switch at k2, and again moves the cam into a position ready to close the nippers when it is again moved as before explained.

In Fig. l are seen in plan two stops 7, which arrest the sheet of paper at the proper point as it is fed by the attendant, to be grasped by the nippers-one of these stops is seen in elevation in Fig. 2, they are dropped in contact with the tympan when a sheet is to be fed to the nippers, and are raised clear of it before it commences to revolve as follows: Attached to the vibrating shaft of the bell crank lever K2 (Fig. 3) is an4 arm N2 on the end of whichis a pin that plays in a slot p, in

the arm O2,fiXed upon the shaft S,to which the stops are attached, and thus whenever the pin e2 upon the bar L2 drops out of the switch at h2 the stops are raised and when this pin enters the switch at 7a2 the stops 7 drop upon the tympan.

' It now remains to explain the manner in which the scraper is caused to descend upon the tympan and force the paper down upon the stone to take the impression.

It has already been explained that the rollers m remain stationary except so far as they may be revolved upon their own axes by the passage of the metallic tympan around them. Between the two lower rolls of the set is a timber or block R2 which carries the scraper 252 this block is held up so that the scraper shall not come in contact with the tympan by springs which hang upon the shaft X (one of which is seen at 292 Fig. 2) it is depressed however for the purpose of forcing the scraper down upon the stone by means of cams S2 attached to the gears C2 and revolving therewith, one of these cams is shown in rod in Fig. 2.

'w are cords by which the printed sheet is led out of the machine in the customary manner, and U2 is a table for holding the imprinted paper.

The vcylinder of rollers and its shaft X, are hung in bearings which are connected with the framework by springs 17, shown in red F ig. 3, that the stone may not be broken by the too great' rigidity of the scraper or the parts which actuate it.

I have spoken of the tympan z' as made of sheet metal, leather may however be used instead.

Operation: The parts being in the position represented in F ig. l, and the carriage moving in the direction of its arrow (Fig. 2) the stone passes irst under the wiper 7 L, and is then inked as described, while this is going on the toothless portion l0 of the gears C2 being opposite to the raclrs D2 the tympan and nippers remain stationary, the nippers being retained open by the pin (Z2 resting upon the portion of the cam G2 ol largest diameter, and the stops rest upon the tympan, occasion is taken of this state of things to introduce a sheet of paper to the nippers and the next instant as the carriage proceeds in the same direction the pin upon the bar L2 passes out of the switch M2 upon the carriage the nippers are closed by the sudden motion of the cams G2 and the stops 7, are raised to permit the revolution of the tympan. The cams f2 upon the shaft F now move the lever E2 in the direction of its arrow and engage the gears l2 with the racks D2 and as the carriage now commences to return the gears are revolved and the nippers and tympan are carried around whereby the paper is brought in Contact with the stone. The cams S2 now force down the scraper upon the tympan which presses the paper down upon the stone and the impression is taken.

What claim as my invention and desire to secure by Letters Patent isl. I claim the cylinder of rollers m in combination with a revolving tympan and scraper operating as set forth for the purpose described.'

2. I claim the method of interrupting the motion of the gears C2 and of again engaging them with the raclr by means of the cams f2 lever E and pin a2 operating in the manner set forth.

I claim hanging the parts which operate the scraper on springs 17 in the manner substantially as specified.

VWM. HERRMANN STUBBE.

Vitnesses THos. R. RoAcH, Trios. L. GLovER.

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