US577584A - Stroh - Google Patents

Description

PRIN'ZFIITG MACHINE.

Np'. 577,584. Pateted Feb. 23, 1897.

8 Sheets--Sheet 2.

(No Model.)

W. M. ROCKSTROH.

PRINTING MACHINE. l

'Patented Feb. 23, 1897.l

ITO. 577,584

(No Model s sheets-sheen 3,

W. M. ROCKSTROI-I. PRINTING MACHINE.

No.' 577,584. Patented PGN 2s, v1897.

8 Sheets-Sheet 4 (No Model.)

`W. M. ROGKSTROH.

PRINTING MACHINE.

8 Sheets-Sheet 5,

W. M. ROCKSTROH.

(No Model.)

PRINTING MACHINE. A

Patented Feb. 23, 1897.

me mams ve-rzns no vnovouwo. wasnwomu, u. c

(No Model.) `8 Sheets-Sheet; 6.

W. M. ROGKSTROH. PRINTINGMCHINE.

- f am, 15am/Own WM f Mm 8 Sheets-Sheet 7 (No Model.)

W. M. ROCKSTROH.

PRINTING MACHINE.

,584. Patented Peb. 2s, 1897.

(No Modeln) Y 8 Sheets-Sheet 8.

W. M."ROCKSTROH.

PRINTING MACHINE.

No. 577,584. Patentedeb. 23, 1897(` llNrrEn STATES A PATENT @Eric-E.

" WILHELM MAX RocKs'rRoi-I, oF PLAUEN, GERMANY.

`PRINTING-IVIACl-.HNE

SPECIFICATION forming part of Letters Patent No. 577,584, dated February 23, 1897. Application filed February 14,1896. Serial No. 579,267. (No model.)

To @ZZ whom t may. concern.-

Beit known that I, WILHELM MAX ROCK- STROH, mechanical engineer, of No. l2 Grenzstrasse, Plauen, near DresdemGerman y, have inventeda new and useful Improvement in Printing-Machines,`of which the following is a specilication. i

It is of essential importance in printingmachiues that the adjustment of the parts that coperatein the formation of the impression should be most exact and correct and that this eXact adjustment should not be injured by the yielding or springing of the said parts. The parts chiefly concerned are the cylinder and the bed, for the relative adjustment of which the bearings of the cylinder have been made adjustable, the bed being made unadjustable also, a bed-adjusting arrangement has been combined with the cylinder-ad j ustin g arrangement.

According to the present invention there are combined in a printing-machine arrangements which enable the lnostexact and correct mutual adjustment of the working parts to be effected in a very simple manner, and also secure that these parts shall be 1n utually unyielding and unalterable. By this means not only are speed and certainty of action secured to an extraordinary extent in the operation of the machine, but the exactness and beauty of the printing is increased to an important degree. The object desired is attained,accordin g to this in vention,hy the combination of a cylindercarried by stationary hearings, and consequently uuadjustable, a form-bed with form adjustable parallel to itself and consequently to the cylinder, and a considerably-increased su pport for the reciprocating form in its longitudinal and lateral directions, with lateral guiding devices for preventing deviations of movement on the part of the box carrying the form. As is well known, the adjustment of the cylinder in its two bearings to its proper position relatively to the form has hitherto been one of the most important tasks of the foreman or other person in charge of the machine, as on this adjustment depends the exact working of the machine. The accuracy of this adjustment depends, however, on the skill of the said foreman or other person, and rests very often more on experiment than on the safer manipulation of mechanism provided for the purpose. Any inaccuracy in the adjustment is immediately visible in the printing and will necessitate correction. To obviate these oloinder whatever over the whole width thereof,

it is provided internally with a number of arms or cross-shaped frames, which are displaced relatively to one another, and also witli=helical ribs that cross one another, so that a rigid cylinder-surface is produced that will not yield at any point.

As a further consequence of the mounting of the cylinder in stationary bearings any necessity for altering the diameter of the cylinder by increasing the thickness of the blanket thereon, as heretofore usual, is avoided, so that the position of the cylinder and its peripheral speed remain constant. The mounting of the cylinder in stationary bearings also possesses the substantial advantage that, on account of its unalteralole position as regards height, there is always the same depth of engagement of its toothed ring with the racks that rotate it, and which are located on the form-carrying box, which always remains at the same height. There is thus avoided the irregularity in the gearing that is always a consequence of any alteration of the height of the cylinder.

The bed carrying the form used in combination with a cylinder mounted in stationary bearings, as described, rests by means of ribs, which are wedge-shaped in the longitudinal direction, on a frame which is provided with corresponding wedges and is situate so as to be capable of sliding on the form-box mounted on the carriage. The adjustable bed is prevented from shifting horizontally and can only loe raised i and lowered. The sliding frame is provided with a screw that is capable of being rotated by an adjusting-wheel, but which cannot move endwise relatively to the frame and which engages in a nut fixed to the aforesaid form-carrying boX. By this arrangement the form can be shifted parallel to itself in accordance with the divisions of a scale, so that it can be adjusted in height,

IOO

and consequently in relation to the periphery of the cylinder, with the utmost accuracy, certainty, and quickness. The points of support of the bed may be as numerous as desired in the direction of. the breadth of the bed. It is desirable that the bed should be supported in such a manner that the supporting or shifting places should be directlyabove the supporting or bearing lines formed by the rows of carriage-wheels, which are arranged one behind another below the aforesaid box.

In printing-machines as heretofore constructed there has been arranged a track or traveling way on which the carriage, with its two rows of wheels, runs after the manner of railway-vehicles. The support of the form was in this arrangement of the machine restricted in the longitudinal' direction to the necessary distance apart o f the carriage-axles, that is, to the wheel-base,and in the direction of its breadth to the bread th of the single track provided. This is, however, recognized as inadequate. The arrangement is supplemented in a machine according to this invention by a second traveling way or t-rack, whereby the support of the form in the direction of the width of the machine is increased fourfold, while an important closing up or contraction of the supporting-lines in the longitudinal direction of the machine is effected by the distribution or displacement between the wheels of the first traveling way of the wheels that roll on the second traveling way. In addition to this very much increased support of the form provision is made against its shifting laterally and upwardly by means of a prismatic guidance of the boX, there being arranged for this purpose at the sides of the box outwardly and downwardly inclined surfaces located between adjustable rollers.

By the combined arrangement hereinbefore set forth a stiffening, which extends from the base-frame upward, is produced, due to the increase of the number and the decrease of the distance apart of the axles in the longitudinal direction of the machine, to the increase of the number and the displacement relatively to one another of the wheels in the direction of the width of the machine, to the mounting on these multiplied supportingpoints of the form-foundation and the supporting thereon ofthe ferm, and to the mounting of the cylinder, which is itself stift'encd, in stationary bearings. Between these sev eral parts only the bed with the form is capable of being very slightly adjusted as regards height, with its firm support nevertheless maintained, the bed and form being secured against any lateral deviation and any improper upward motion by the prismaticroller guidance of the box.

The accompanying drawings represent a printing-machine constructed according to this invention.

Figure l is a side elevation of the machine with the foundation box, the adjustable wed ge-f rame mounted thereon, and the formbed resting on the Wedge-frame, in section. Fig. 2 is a cross-section on the line a: ai of Fig. 1. Fig. 3 shows the arrangement of the carriage-wheels in plan. Fig. et is a view of the printing-cylinder, half in elevation and half in section. Fig. 4 is an end view of the cylinder to a smaller scale, showing the means employed for strengthening it. Fig. 5 is a side view of the inking apparatus. Fig. 6 is a transverse sectional view of the same. Fig. 7 is an end view of the cylinder, showing the gripper arrangement and blanket-clamping attachment. Fig. S represents a front view of the cylinder corresponding with Fig. '7, partly in section.

From the bed ct of the machine rises the side frames b b', carrying iiXed bearings in which the cylinder c is mounted to rotate. On the bed a there are formed or arranged four ways ct d2 d3 di. On the outer ways d d4 run the wheels of the axles e e2 es, and on the inner ones-viz., d2 cl3-the wheels of the axles f f2. Vith one of the latter axles there engages the driving-rod f, by means of which the carriage comprising the frame f* and the wheels and axles connected thereto are caused to move to and fro, The inner wheels are so arranged with regard to the outer ones that there are only the smallest practicable distances between the wheel-axles e j" e2 f2 e3, while there are at the same time only short distances between the places where support is afforded in the breadth of the form by the four rows of wheels. All the wheels are provided with rings of teeth in gear with racks fixed to the bed a. and to the form-carryingbox Ct. This box a', which bears on the carriage below, as shown, is provided over each row of wheels with longitudinal rails or ways g' g2 g3 g4, on which wedges t/ h2 h3 h4, which are connected together to form a frame lt, Fig. l, rest and can slide, while on these wedges rest the oppositely-arranged wed ges t" t2 t3 t4 of the bed lt, which carries the form. (Not shown.)

The frame 72, is provided with an adjustingscrew l, which is so mounted that it can be rotated, but cannot move endwise relatively to the frame, and which enters a nut m, fixed on the box a', the arrangement being such that by rotating the screw, by means of the handwheel thereon, the frame h can be screwed in or out, whercbythe bed k and with it the form resting thereon can be accurately, easily, securely, and quickly brought, in accordance with a suitable scale, to the desired position as regards height in relation to the cylinder c. The box a has at n 'nl downwardly and outwardly inclined surfaces, against which rollers 0 o, which are adjustable in the machine-frame, lie and form a prismatic guide, which prevents the box from moving laterally or rising.

The cylinder c, Figs. 4t and 4ta, is provided internally with cross-arms c c2 c3, which are displaced relatively to one another, and with helical strengthening-ribs c4 and c5, which cross each other, as shown.

The endeavor to reduce the adjustment of the machine to the smallest amount and to the least number of adjusting devices is completed by a disengaging arrangement which is provided for the purposev of removing the inking-rollers and distributing-rollers from the ink-transferring cylinder represented in side elevation in Fig. 5 and in cross-sectional elevation in Fig. 6 and by a gripper arrangement and blanketclamping arrangement represented in end view in Fig. '7 and in side elevation, partly in section, in Fig. 8. The left and right hand portions of Fig. 6 are sections on the lines zz and z' a', respectively, of Fig. 5.

It is important that boththe inking-rollers p p', which transfer the ink to the form, and also the distributing4rollers q q', to which the ink is transferred from the ink-box, should be capable of being moved away from the large ink-cylinder r, that lies between these pairs of rollers, when the machine is to stand still for any length of time, for the resting-lines formed between the past rollers and the iron cylinder when the machine is allowed to rest for a time are injurious to good contact-surfaces. whole of the rollers from the cylinder r to be effected quickly and easily by the rotation of a single part, the following arrangement is provided: On a shaft s', on which is a lever s, there are arranged two eccentrics s2 s3, the

straps of which are connected by links s4 and links 35 s6, that form toggles with the bearings 37 S8 of the inking-rollers p p', which bearings are located in horizontal sliding ways. By turning over the lever Sthe links S5 s6 are raised and push the bearings S7 S8 away from each other in opposition to the pressure of springs 39, which, when engagement is to be effected by the turning back of the lever s, carry the bearings with the rollers back into the working position. Likewise, by turning the lever s, eccentrics t2, also iixed on the shafts s', are rotated, and the rods t3 t of said eccentrics are caused to raise levers t3* if and cause bolts t5 t6 to press with their heads against the ends of the adj usting screws of the bearings tl t8 of the rollers q q' and thereby so raise the bearings that the rubbing-rollers q q' are lifted off the cylinder r. The bearings t7 t8 can also slide back under spring-pressure into their working positions upon the lever s being turned back. There is provided for the said rollers 9' and C a bearin T arrangement which is shown in the right-hand side of Fig. 6 and according to which the bearings .S8 and t8 consist of bolts u, that are capable of being slid back and are provided with bearingboxes and which can be pushed back against springepressure into cases to enable the ends of the roller-axles to be readily removed from the bearings. p

The grippers and clamping-in arrangement for the blanket on th'e cylinder (shown in end view in Fig. 7 and in longitudial view To enable this moving away of the' in Fig. 8) are to be considered as essential auxiliaries in this printing-machine for preventing the machine foreman from neglecting the machine.

As to the grippers it is well known that the machine foreman has often to adj ust the grippers, which is done by striking them so Ias to make them act correctly and all grip each sheet of paper exactly when the same is fed thereto. Now any adjustment is obviated by the gripper arrangement now to be described, an essential feature of which is that the axis of rotation of the gripper-bar is arranged as near as possible to the periphery of the cylinder, and each gripper is independently rotatably mounted, the end of the gripper that projects backwardly with regard to this axis of rotation being subject to springpressure in order always to press the fore end of the gripper down upon the cylinder, so as to secure a proper grip.

In the recess in the periphery of the cylinder shown in Fig. 7 there is arranged, with its pivots c as far out as possible, the bar fu, that carries the grippers o2 and which extends from end to end of the cylinder. The periodical rotation of this bar for operating the grippers c2 takes place in a known manner through the action of cam -surfaces and spring-pressure, the grippers o2 being rotatably mounted in small brackets c3 on the bar 0. Each gripper has, as usual, a long free end for gripping the sheet. Itis, however, lengthened backward in the form of an arm n* beyond the axis of rotation on the bracket o3,

and this end is subject to the pressure of a spring @4 provided under it. From this arrangement it follows that the gripper, besides possessing the ordinary motion for seizing a sheet, (which movement when the drag-bar is moved acts as near as possible to the periphery of the cylinder in such a manner that the gripper never moves the sheet, but always comes down upon it from above,) acts under all circumstances with additional gripping by reason of the spring-pressure and thus requires no further help or adjustment by the machine foreman. In the aforesaid recess of the cylinder c are also situated the clamping devices for the blanket, which, since the cylinder is constructed and mounted as hereinbefore described and subject to no displacement in height and very seldom requires enlarging, will generally only require to be single. The clamping arrangement is a double one, one part being for the ordinary blanket and the other for the covering oil-sheet.

The face of the stationary jaw w is formed IOO IIC

with a groove w', in which can engage the n semicylindrical rib @u2 of the jaw w3, which moved away from the jaw w far enough to permit the introduction of the end of the blanket between the said jaws, after which on releasing the jaw w3 the spring will close it upon the blanket and effect the clamping of the latter. The jaw w3 has also a groove w in its back, in which engages the rib w7of a jaw au", which works on a pivot w10 and is subject to thepressure of a spring w8. The rib w7 clamps fast the end of the oil-sheet inserted in the hollow channel w. In this way the insertion of the blanket is greatly facilitated and the secure holding thereof insured. The tightening up of the blankets upon the surface of the cylinder is effected on the opposite side of the cylinder by means of the ordinary round bars u u2, provided with check action.

The above-mentioned move ment of the jaw w3 to permit the introduction of the blanket may be effected by prying back the said jaw with a suitable instrument inserted between it and the jaw w at their ends which project beyond the edges of the blanket or by the pressman applying his hands to the arms w3* through openings in the ends of the cylinder. The corresponding movement of the jaw wf to permit the introduction of the oil-sheet is to be effected by prying it back from the jaw w3 in the same way as described with reference to the movement of the latter.

. What I claim as my invention isl. In a printing-machine, the combination of a printing-cylinder and stationary bearings therefor, a reciprocating form-box and prismatic guides therefor whereby it is prevented both from rising and from moving sidewise, a form-bed adjustable in said box toward and from the cylinder in parallel relation to itself and to the cylinder, means substantially as described for effecting such adjustment, a carriage for such form-box, a fixed foundation and three or more fixed supporting-ways for said carriage, wheels under said carriage for running on the several ways, the axles of said wheels rolling on the different ways being arranged as near as practicable to each other and those on each way being arranged between thoseron the next way so that the form is supported in the direction of its length and breadth at many places by the foundation and the carriage, substantially as herein set forth.

2. The combination of a form-box, a carriage for said form-box, three or more fixed ways for said carriage, wheels for said carriage running on said fixed ways those wheels on -each'way being arranged between those on the next way, and an impression-cylinder having internal helical strengthening-ribs crossing each other, all substantially as herein described.

3. The combination with a printing-machine cylinder, of a rotatable gripper-bar o pivoted to the cylinder near the periphery thereof, brackets o3 on the said bar, grippers U2 independently pivoted to said bar and prolonged backward beyond their pivots, and springs applied to the backward prolongations of the several grippers for pressing them upon the sheet, substantially as herein described.

4. The combination with a printing-inachine cylinder, of blanket-clamping devices consisting of a fixed jaw and a spring-pressed pivoted jaw provided with a groove and a rib that engage with each other for receiving the blanket ends, and a spring-pressed clampingjaw pivoted to the back of the rst-named pivoted jaw and engaging therewith by grooves and ribs for receiving the ends of the oiled sheet, all substantially as herein described.

5. In a prin ting-machine of the kind herein described wherein the distributing-rollers which are in rolling contact with the large inkcylinder when the machine is in use, the combination with the said rollers of separate movable bearings therefor, springs applied to said bearings to press the several rollers toward the said cylinder, a lever common to all of said bearings and mechanism substantially as herein described intermediate of said lever and bearings for withdrawing the several rollers at one time from contact with the cylinder, as herein described.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

VILHELM MAX ROCKSTROH.

Witnesses:

MARTIN KRNER, WILHELM WIESENHTTER.

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