US495142A - riese - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.)

0. RIESB & H. POHL. I INKING DEVICE FOR PRINTING MACHINES. No. 495,142.

Patented Apr. 11, 1893.

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2 Sheets-Sheet 2.

0. RIESB & H. POI-IL. INKING DEVICE FOR PRINTING MACHINES.

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Patented Apr. 11, 1893.

QM Hermann fihl UNHED STATES PATENT OFFICE.

OSKAR RIESE AND 'HERMANN POHL, OF BERLIN, GERMANY.

INKING DEVICE FOR PRINTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 495,142, dated April 11, 1893.

Application filed March 18, 1892. Serial No. 425,459. (No model.)

To all whom it may concern:

Be it known that we, OsKAR RIESE and HERMANN POHL, both subjects of the King of Prussia, German Emperor, and residents of Berlin, in the Kingdom of Prussia, German Empire, have invented a new and useful Inking Device for Printing-lVIachines, of which the following is a full and exact specification.

Our invention relates to printing-machines with oscillating platen, and consists in an inking-device in which the roller taking the ink from the fountain roller is given one complete revolution during the time it is in contact with the same, and in which the fountain roller remains at rest during the time the distributing roller is passing over the distributing-plate, from which the ink is taken to the types by means of inking-rollers.

The better to make our meaning clear, we will proceed to describe a machine fitted with our inking-device as represented on the accompanying drawings, on which Figure 1 is a side elevation of the machine. Fig. 2 is a rear elevation of the same, in the direction of the arrow P in Fig. 1. Fig. 3 is an upper view of the same, in the direction of the arrow P in Fig. 1. Figs. 4 and 5 are details showing two different positions of the eccentric s and cam disk 5.

Similar letters refer to si milar partsthroughout the several views.

A is the frame of the machine, and a. the driving shaft of the same, on which the flywheel is mounted.

a. is the pivot on which the platen oscillates; the platen itself is not shown on the drawings, the bed is fixed to the frame at B. At the upper end of the bed B there is pivoted to the frame the distributing-plate T, and b is the axle to which are secured the arms carrying the inking-rollers,w which are guided over the distributing-plate T and the bed B. The construction of these arms and rollers does not dilfer from the usual ones.

Motion is transmitted from the drivingshaft a to the shaft 0 by means of toothed wheels gearing into another, as indicated by dotted lines in Fig. 1. On the shaft 0 there is a crank 2', to the end of which is linked the connecting-rod .2 extending upward, the free end whereof is provided with teeth, thus forming a rack. These teeth engage with those of q firmly mounted on the axle of the fountain 7 roller f, by means of a spring not shown on the drawings. It will be understood that when the connecting-rod z descends, it rotates the fountain roller f, as the pawl 13 engages with the toothed wheel q; but when the connectingrod ,2 moves upward, the pawl 10 glides over the teeth of the said wheel q, and the fountain roller f is not rotated. The upper end of connecting-rod z is also guided by means of a roll at pivoted to the frame A.

On the shaft 0 we also mounta cam-shaped disk 3 and at the side of the, same an eccentric 8' (Figs. 1 and 2). The disk 8 is of the form shown in Fig. 1, having a semi-circular portion. The cam-disk sis constantly in contact with an upper roll 1' and the eccentric s with a similar lower one 1". Both rolls 1- and r are secured to the slide G, which is guided on the shaft 0 by means of the slot 61 and in a guide 6 on the frame A, by means of an extension e. The shape of the cam-disk s and eccentric s is such that the rolls 0" and r are always held exactly the same distance apart, and constantly rest on the said disk and eccentric, as already mentioned. To the upper end of the slide G there is linked the connecting-rod L, which is again linked at 0 to the swinging fork S, pivoted to the frame A at g 9. To the ends of the fork S there are secured in the usual manner the rods h, fitted with springs h, and receiving the axle of the distributing-roller Z in hooks provided at their free ends.

The operation of our improved inking-device is as follows: In Fig. 1 the distributingroller Z has just reached its highest position, the shaft 0 revolving in the direction of the arrow, and said roller Z is thereby pressed against the fountain roller f. It will be seen that the latter is already in rotation when the distributing-roller is applied to the same, as the crank z'and connecting-rodzhave already Before the rotation of the said fountain roller f is stopped, (when the connecting-rod 2 begins its upward course,) the eccentric 8 depresses the lower roll 7' and thus moves-the distributing-roller 1 off the fountain roller f, and gradually brings the same into the position shown on Fig. 1 in dotted lines,when the eccentric s, cam-disk 3, rolls 0" and r and shaft 0 occupy the position III illustrated by the diagram Fig. 5. During this movement the inkis distributed-from the distributing-roller Z on the distribntingplate '1. We have adopted this manner of moving the distributing-roller l-off the fountain roller f before the rotation of the latter is stopped, in order to secure a completely uniform distribution of the ink on the distributing-roller I, which would be impossible otherwise. If the distributing roller is allowed to remain incontact iwith thefountain-roller till the rotation of the-latterhas stopped,and is only then removed out of contact with the same, the ink, instead of being uniformly distributed on the surface of thedistributing roller, will. collect at the place of contact when the rollers have ceased to rotate, and thus there will arise an accumulation of ink along the said line of .contact. The shaft ccontinuing its rotation, theposit-ion Fig. 1 is soon reached again, and thenthe movements repeat as described.

Itwill be understood that the movements of the distributing-plate T and of the inkingrollers w are such as not to interfere withthat cally effecting a complete rotation of tl16f01111- tain roller, and means for bringing the distributing roller against the fountain-roller after the rotation of the latter has begun, and removing it from the fountain roller before the rotation of the latter is stopped, for the purpose set forth.

2. An inking device for printing machines, consisting essentiallyin the combination, with a rotatable shaft, of a reciprocating rack and means for operating the same from said shaft, a fountain roller and means for effecting a complete rotation of the same at each downward movement of the reciprocating rack, a reciprocating distributing roller and means for pressing the same against the fountainroller after the rotation of the latter has begun, and removingit from the fountain-roller before the rotation of the latter is stopped, and an ink distributing plate to receive the ink from the distributing roller, substantially as and for the purpose described.

3. An inking device ,for printing machines, consisting essentially in the combination, with the rotatable shaft 0, of the crank 2', the reciprocating connecting-rod .2 provided with teeth at its upper end, the fountain rollerf,

the-ratchet-wheel 'm looselymounted on the axle of the same and engaging with theteeth .of the connecting rod 2, the pawl 19 rigidly connected to said ratchet-wheel m, the toothed rollerf and adapted to be rotated through a complete circle bythe pawl 19 at each-downward movement of the connecting-rod 2, the

cam-disk s, eccentric 3', rolls r and r, slide G having slot (1 and extension e, guide e for the same, connecting-rod L, swinging fork S, rods h, the reciprocating distributing roller Z and distributing plate T; the movements of the OSKAR RIESE. 'HERMANN POHL.

Witnesses:

FR. SPooBINoJ, R. I'IERPICH.

wheel q,'key-ed to the axle of the fountain ICO

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