US1518563A - Apparatus for correcting printing presses - Google Patents

Description

L. W. CLAYBOURN APPARATUS FOR CORRECTING PRINTING PRESSES Dec; 9, 1924.

Original Filed Feb. 6, 1922 5 Sheets-Sheet l lNl/E/V TOR.

' L. W. CLAYBOURN APPARATUS FOR CORRECTING PRINTING PRESSES Original FiledFeb. 6, 1922 5 Sheets-Sheet 2 f v N. g ma x. W\\

'L. W. CLAYBOURN APPARATUS FOR CORRECTING PBINTING PRESSES 5 Sheets-Sheet 5 Original Fil Fe 6, 1922 Q I H Dec. 9, 1924. 1,518,563

L. w. CLAYBOURN APPARATUS FOR CORRECTING PRINTING PRESSES Original Filed Feb. 6, 1922 5 Sheets-Sheet 4 L. W. CLAYBOURN APPARATUS FOR CORRECTING PRINTING PRESSES Original Filed Feb 6, 1922 5 Sheets-Sheet 5 N V15 N TOR.

Patented Dec. 9, 1924.

UNITED STATES LESLIE W. CLAYBOURN. F MILWAUKEE, WISCONSIN.

APPARATUS FOR CORRECTING PRINTING PRESSES.

Original application filed February 6, 1922, Serial No. 534,348. Divided and this application filed December 17, 1923.

To (171 10710222 1'1 may concern:

Be it known that I, Lnsmr. V. CLAY- noi'nx, a citizen of the United States, residing in the city of Milwaukee, in the 5 county of Milwaukee and State of Visconsin (formerly residing in the city of Menasha. \Vinnebago County, W'isconsin), have invented certain new and useful Improvements in Apparatus for Correcting Printing Presses, of which the following is a specification.

My invention relates to apparatus for correcting the printing couples of printing presses comprising either a reciprocating bed or a rotating cylinder, or both such bed and cylinder.

I have exemplified my invention as applied to a printing press employing reciprocating type-beds and rotating tympan cyl inders coacting with the beds in a so-called two-revolution two-color printing press, al-

though it will be obvious that my invention is employable in other relations.

I have found that best printing results are obtained when the periphery of the cylinder represents a true cylindrical surface concentric with its axis of rotation and the type-supporting surface of the reciprocating bed is in a true plane parallel with the axis of rotation ofthe cylinder, and it is the object of my invention to, obtain this desirable condition.

It has heretofore been a practice to separately operate upon the guideways of the frame for the bed, upon the guideways at the'underface of the bed, the intermediate anti-friction mechanism therefor, and the type-surface of the bed, as well as upon the peripheral surface of the cylinder and the journals and bearings therefor, and to thus Serial No. 681,237.

ripheral surfaces of the cylinder and the type-surface of the reciprocating bed, due to displacement of the metal in the parts, and additional variations are in course of time created in the printing press by the wearing action of the printing pressures between the tympan cylinder or cylinders and the typebed or beds.

In practice the bed reciprocates upon antifriction devices, such as rollers or so-called sliders, embracing a slider-frame and antifriction rollers therein, and in practice the *greater portions of the printing pressures due to the make-ready and also the greater amount of printing takes place at or adjacent to the middle of the bed, resulting in course of time in a depression of the middle portion of vthe bed and a depression of the middle portion in the length of the cylinder, so that whatever cylindrical form the cylin-' der initially had, and whatever plane surface the type-bed initially had, are lost and the surfaces distorted, the result being a hollow bed or beds and a cylinder of less diameter atits middle portion than at .its end portions. I f

Under the general designation type I include separable type, lines of type, plates, blocks and other printing surface supporting means. In a two-cylinder printing press, such as exemplified, there is a typebed for each cylinder, instanced however as connected for combined movements.

It is the object of my invention to correct such undesirable conditions due to methods of building and assembling printing presses heretofore in use and due to the wear hereinbefore described.

It is"-the object of my invention further further, as one of the steps in my improved system of printing.

For accomplishing such object, I have conceived apparatus for finishing the typesupporting surface of the type or plate-supporting member of the printing couple, instanced as the type-bed, and the peripheral surface of the cylinder, after the printing press has been assembled and is operable for printing purposes, so as to correct said members in their operative relations to each other, and, further, to provide apparatus operable in conjunction with a printing element or elements to correct printing presses which have been in operation and in which improper relation between the type-supporting surface and the peripheral surface of the tympan cylinder has been accentuated by wear, and, further, to provide novel means whereby to cause such corrections to take place under substantial printing pressures.

It is the object of my invention, further, to provide means acting in conjunction with the type-bed orcylinder whereby to correct the type-bed or type-beds and the cylinder or cylinders by finishing their denuded supporting surfaces during movements of said members similar to their printing movements, or in substantially their printing relations, though not necessarily at printing distance from one another or at printing speeds; or printing directions; further. to employ the operating devices for said bed and cylinder in the truing operations.

"The terms printing relation and operative relation where they occur in the descrip tion and claims herein mean such relation as to result in movements of the respective members of the printing couple similar to their respective movements in performing their printing functions, though not necessarily in printing proximity or at printing speeds or in printing direction. The speeds and directions of movement of the respective members of the print-ingcouple during correction thereof are desirably such surface speeds and directions as are adapted for the tools and positions of the tools employed in correcting. p

The invention will be further readily understood from the following description and claims, and from the drawings, in which latter:

' Fig. 1 represents a diagrammatic longitudinal section of a printing press, showing the inaccuracies in magnified form due to wear, for the purpose of illustrating defects corrected by my invention.

Fig. 2 is a diagrammatic representation of a cross-section of the same, showing such defects in magnified form for similar purposes.

Fig. 3 represents a side elevation -of so much of a two-revolution two-color printing press as is necesary to illustrate my invention, and. havingmy improved apparatus applied thereto.

Fig. 4 is a reverse side elevation of the same.

Fig. 5 is a plan view of the same.

Fig. 6 is an end elevation of the same.

Fig. 7 is a cross-section of the same, taken on the line 77 of Fig. 5.

Fig. 8 is an enlarged central vertical longitudinal section, showing one of the correcting devices in applied relation to the cylinder, taken on the section line 8'8 of Fig. 5.

Fig. 9 is a similar view, showing the correcting device in its application to the table. Fig. 10 is a cross-section of the same, taken on the line 1010 of Fig. 8.

Fig. 11 is a cross-sectional view of one of the pressure rollers, taken on the section line 1111 of Fig. 9.

Fig. 12 is a plan view detail of the gage for the tool-slide adjustment.

Fig. 13 is a plan view, showing the feeding means for the cross-slide, partly broken away.

Fig. 14 is a detail in side elevation, showing the means for intermittently rotating the fountain roller.

Fig. 15 is a cro$-section of the same, taken on the line 15-15 of Fig. 14.

Fig. 16 is a side elevation of av detail of the operating means at the fountain roller to transmit motion to the cross-feed screw.

Fig. 17 is an inside elevation of the same.

Fig. 18 is a cross-section of the same, taken on the line 18-18 of Fig. 16.

Fig. 19 is a side elevation of the feeding means at the cross-feed screw.

Fig. 20 is a central vertical longitudinal section, taken on a line corresponding to the line 8-8 of Fig. -5, but showing the correcting tool as an emery wheel and applied to the cylinder.

Fig. 21 is a similar cross-section, showing the correcting device applied to the table.

Fig. 22 is a plan view of the same, partly broken away.

Fig. 23 is a rear elevation of the same, partly broken away; and,

Fig. 24 is a plan view of the positioning gage for the correcting device.

I do not herein claim the method herein shown and described, having shown, described and claimed the same in a copending application, of which this application is a division, for method of correcting printing presses, filed in the United States Patent Otfice Februarv 6, 1922, as Serial No. 534,348; to which reference is made for a more full exposition of said method and the claims thereto.

My invention is shown applied to a twore'volution two-color fiat-bed printing press, although the same is applicable to other printing presses. -The. exemplified printing press comprises the beds 21 and 22, which 7 the beds is provided with side bearers 25.

The printm press has ausual main frame, comprising side frames 31, and cross-girts 32, 33, which have tracks 35, 36, 37, 38, thereon, extending longitudinally of the frame, the cross-girts comprising uprights 39 on which the tracks 37, 38, are supported.

Anti-friction devices are located between the type-beds and the tracks, exemplified as sliders, each of which comprises a framework 41, and -anti-friction rollers 42, which roll on the tracks. Tracks 45, 4 6, 47, 48, on the under surface-of the bed, ride on the rollers of the sliders.

The.tympan cylinders are provided with trunnions 51, 52, journaled in bearings 53, 54, eccentrically journaled in bearing-blocks 55, 56, respectively adjustable by adjusting screws 57, 58, and 59, 60, in guideways 61, 62, in standards 63, 64, of the frame, suitable means being provided for raising the impression cylinders into off-impression relation or causing their descent into on-impression re-.

lation to the-beds at alternate revolutions of the cylinders, or as desired, in the usual op-. eration of the printing press, accomplished for instance by means of links 66, 67, articulated with arms 68, 69, extending from and rigid with the eccentric bearings. The lower ends of the-links are operated by usual cam and lever mechanism having operative con-- nections with usual cam- disks 71, 72, suitably rotated in the usual operation of theprinting press.

Each of the tympan cylinders comprises side bearers 73,.which coact with the side bearers 25 on the beds. The usual tympan sheets and covering are received over the peripheral surface of the cylinder in the recess between the side bearers thereon, and the type are received on the supporting surface of the bed between the side bearers thereon. The contact faces of the side bearers which coact with each other are intended to be in the plane of the printing surfaces of the type at he rinting moment.

A transf r cy inder 76 is located between the tympan cylinders and may be of usual constructlon.

The sheets to be printed are arranged to be fed to the first tympan cylinder 23 from a feed-board 78, the sheet being arranged to be gripped by suitable grippers on the cylinders and carried around the cylinder in the direction of the arrow a for the purpose of being rinted, in the usual manner, the bed 21 of e first printing couple moving in the directlon of t e arrow 7) in this \printing operation.

After being printed by the first printing couple, the sheet travels with the cylinder 23 in its rotation until the advanced edge of the .printed sheet arrives at the transfer cylinder 76, when it is released by the grippers of the tympan cylinder 23, and gripped by the grippers of the transfer cylinder 76, and carried in usual manner with the transfer cylinder in the direction of its rotation, the

direction of which is indicated b the arrow 0, to the tympan cylinder 24, o the second printing couple.

Upon arrival of the advancing edge of the sheet at the tympan cylinder 24, the said advancing edge is released by the grippers o the transfer 1 cylinder and grasped by the grippers of the second tympan cylinder, and

then carried about the second tympan cylined at 81, where it is transferred to the delivery mechanism for delivery of the sheet.

The structures of these parts ,and their operations may be of any usual or ordinary kind. Th grippers are not shown, as the same have been removed for the purpose of having. my improved apparatus operate upon the tympan cylinders. It will be understood that only somuch of the printing press is shown as is concerned with the operation of my improved apparatus thereon.

In the usual printing operation of the printing pressv the printing surfaces supported by the bed-sections are suitably inked by suitable; form rollers, suitably placed, and supplied with ink in any ordinary orwell-known manner, for instance from usual ink tables, not shown, but normally secured to the outer ends of the beds,

supplied with ink by coaction with suitable ink distributing and ink supplying/rollers, the initial ones of which are shown respectively as fountain rollers 85, 86, at the respective ends of the press, to which intermittent motions are imparted by any ordinary or well-known means.

I have exemplifiedthe means for rotating the cylinders, for reciprocating the bed-sections, and for intermittently rotating the fountain ink rollers,-as follows: A driving shaft is exemplified at 91, and is arran ed to have suitable driving means, exempli ed as a tight pulley 92 and aloose pulley 93, over which a suitable belt from a suitable source of power is arranged to be selectively received.

A gear 94 is fixed on the driving shaft of the tympan cylinder 23 and meshes with the gear 101.

The drive-shaft 91 is arranged further to reciprocate the bed by any well-known mechanism, instanced as accomplished by means of a pinion 108 which rotates with the shaft 96, but has spline-connection therewith, and arranged to be alternately brought into mesh, by axial shifting thereof on its shaft by any well-known mechanism, with racks 109, 110, extending lengthwise of the bed-structure, on. which both bed-sections are located, and supported respectively by the bed-structure and by a hanger 111 depending from the bed-structure, for alternately driving the bed-structure in reverse directions.

Intermittent rotation is shown impartedto-each of the fountain rollers. This may be accomplished by means of a link 116, one end of which has articulation with a crankpin 117 on one ofthe cam-disks 71, '72,- Which are employed for imparting the desired movements to the eccentrics for controlling the on-impression and off-impression relations of the tympan cylinders. The other end of the link 116 has articulation with a l lever 119, journaled about the shaft 120 of the fountain roller; this shaft being journaled in bearings 121 of end frames 122 of the respective inkfountains 123, 124.

A ratchet-wheel 125 is fixed to this shaft. A pawl 126, pivoted to the lever 119, is urged towards said teeth by a spring 127 engaging a pin 128'on the pawl. When the link moves the lever in one direction, an idle movement of the pawl with relation to the ratchet-wheel takes place, and when the lever is moved in the opposite direction, the pawl engages one of the teeth of the ratchetwheel for partially rotating the fountain roller. A spring detent 129 .is arranged to engage notches 130 in a disk 131, fixed to the shaft of the fountain roller, for holding the fountain roller in actuated relations.

In order to control the degrees of movements of the fountain roller, a cover-cam 134 is provided, having a cover-periphery 135 extending outwardly beyond the ratchetteeth to cause the pawl to ride thereon when the cover-portion is in the range of the pawl. The cover-cam ,is adjustable about the shaft of the inking roller, and is arranged to be held in adjusted positions by cover-cam, and arranged toclamp the tailpiece toone of the end-frames of the inking fountain for holding the cover-cam in adjusted positions, to determine the number of teeth of the ratchet-wheel which shall be exposed to the action of the pawl, and thereby determine the angular distances of rotation of the inking roller at each rotation thereof.

The parts and operative devices of the printing members hereinbefore specifically described. are such as are usual in printing presses of this character, and the same or other usual devices usually employed in their stead may be employed in carrying out my invention.

Referring to Figs. 1 and 2, representing diagrammatically the inaccuracies described prevalent in printing presses, the type-supporting surface 141 of the type-bed is denuded of its type, including all printing surface supporting elements, and the supporting surface 142 of the tympan cylinder is shown denuded of the tympan sheets and tympan covering means, to expose said surfaces.

- It will be noted that depressions are present in the type-supporting surface of the type-bed and in the peripheral surface of the tympan cylinder. The type-bed is exemplified as hollowed toward its middle, as shown at 145. It is assumed that such ofthe rollers 42 and the tracks therefor under the bed as have become worn have been renewed by replacement, or refinishing, for proper travel of the bed. Any such wear is greatest under the middle portion of the bed. The middle portion of the type-bed in practice receives the greatest prlnting pressures, as

well as has the greatest amount of printing the middle portion of the type-bed. For

similar reasons the tympancylinder has depresslons formed therein, represented as a hollow 148 toward the middle of the tympan cylinder.

These deformities are accentuated in Figs. 1 and 2, from what they are in actual practice, in order to clearly show the defects which are corrected by my invention, other defects being variations due to the separate finishing of coacting surfaces and operating and supporting parts in the making of printing presses as heretofore usually constructed.

I shall now describe the mechanism which I prefer to employ in correcting the typesupporting surface of the bed, and the peripheral surface of the tympan cylinder. I

have in'Figs. 3, 4 and 5 (see also Figs. 8 and 9), exemplified one of these apparatuses with its finishing tool presented toward the bed of one of the printing couples at one end of the printing press, and another of the apparatuses with its finishing tool presented toward the cylinder of the other of the printing couples at the other end of the printing press. hen correcting the printing press, I prefer to remove those portions thereof which might be in the way of the finishing operations and are not concerned therein, including the distributing rollers and the form rollers of the inking mechanism and the stands therefor.

I prefer to provide my correcting apparatus with supports arranged to be attached to the frame of the printing press and supporting a guideway for the finishing tool in such manner that the finishing tool may be presented to the bed or to the cylinder without disturbance of the supports so that when the supports have been secured to the frame in such manner that the feeding motionof the finishing tool is. parallel with the axis of rotation of the cylinder, such setting-may be employed for finishing both members of the printing couple, instanced as the cylinder and the bed.

Thus I employ a pair of supports 151 arranged to be secured to the side frames of the main frame of the printing press, for instance, by means of bolts 152 received through slots 153 in the supports and threaded into threaded holes in the side frames,

which may be the threaded holes used to connect the bearings for the form rollers to the side frames.

A cross-rail 155 is supportedon the supports, preferably in such manner, as to permit the cross-rail to be angularly adjusted on the supports for presenting the tool thereon either to the bed or to the cylinder. For this purpose I provide the supports with grooves 156 in which tongues 157, 158, on

the cross-rail are arranged to be received, for positioning the cross-rail definitely with relation to the supports.

A cross-slide 161 is fed lengthwise of the cross-rail, that is, transversely of-the printing press, bemgguided in such travels by gu des 162, 163, on the cross-rail coacting with guideways 164, 165, in the cross-slide. The guide 162 and its complemental guideway are shown as square and the guide 163 and its complemental' guideway-are shown as tapering, comprising a take-up gib 166', acted upon by take-up screws 167 for adjusting the sliding contact in the guides'andguide-ways, amb-nuts 168 fixing the adjustin'g screws in adjusted positions.

Feeding movement is imparted to the cross-slide by means of a cross-feed screw 171 of fine pitch having threaded connection with a nut 172 secured to the cross-slide. A'

ratchet-wheel 173 is fixed to the cross-feed screw. .The feed-screw is journaledat its respective ends in bearings 174, in the crossrail. i

justable connection for adjusting the disstances of steps of feed of the cross-slide, in addition to the adjustment heretofore described for adjusting the extents of rotative movements of the fountain roller.

In order to accomplish this, I provide an arm 182, having operative connection in manner hereinafter described, with the shaft 120 of the fountain roller, to impart intermittent rotary movements to the cross-feed screw 171. This arm is provided with a slot 184. The link 180 is received through an eye 185, arranged to be clamped in adjusted positions lengthwise of the link by means of a set-bolt 186. The eye is swivelingly mounted by a swivel 187, at the head end of a bolt 188, received through the slot 184, a clamp-nut 189 .clamping the bolt in adjusted positions lengthwise of. the slot 184. When now the printing press is placed in operation for operating the parts remaining therein and concerned in the'correction of the printing press, reciprocating motion is imparted to the'lever 119 by means of the crank-pin 117 and link 116, which reciprocating motion is in turn imparted as an intermittent rotary motion by the arm 182 to the tool-feeding mechanism.

A tool-slide 191 isadjustable transversely of the cross-slide in a guideway 192 by means of an adjustingscrew-193 journaled in a lug 1 94 in the tool-slide, in which the adjusting screw is held endwise, and having threaded engagement with the crossslide. This adjusting screw preferably has a -fine pitch for minute adjustment of the finishlng tool toward and from the surface for correcting printing presses herein exemplified, I first replace any worn rollers frames and insert the bolts 152 and thread the same into said side frames. These supports are so adjusted as to cause the grooves 156 therein to be parallel with the axis of rotation of the cylinder, so that the feeding movement of the cross-slide on the cross-rail supported by the supports shall be parallel to such axis of rotation in order that the periphery of the cylinder may be finished as a true cylinder having the axis of rotation coincident with its axis.

The positioning for parallelism of the cross-rail may be obtained, for instance, by a suitable gage 205, having a pointer 206 received in the centermark of one of the trunnions of the cylinder, and having another pointer 207, adjustable thereon, by

means of being mountedin a. slot 208, and clamped in adjusted positions by means of a nut 209 received over a threaded shank 210 in said slot and having a shoulder 211, the body of the gage being clamped in adjusted positions between the nut" and the shoulder. The pointer 207 is caused to be received in the center mark in the end of the feed-screw. A

The pointers being adjusted to the desired distance, and the cross-rail and its supports having received a preliminary fastening for placing the cross-railin proximate parallelism to the axis of rotation der, the definite adjustment of the, crossrailmay be accomplished by employment of the gage, held perpendicular to the axis of rotation to the cylinder, and causing the v punch marks-imthe respective ends of the feed-screw to register with the pointer 207 of the gage, while the pointer 206 thereof is held in the center punch mark of the trunnion at the same side-of the press.- The operation is repeated at. opposite sides of the press, and the adjustments continued until the desired result is obtained.

' A definite positioning of the supports may be had by tapping upon the same in order to shift the support on the side frame for causing proper positioning of the sup-- port with relation to the cylinder determined by the gage in the manner described.

"lhe clamp-bolts may then be fastened and the parallelism .again tested by means of the gage. Sinnlar operationsmay be performed at each end of the cross-rail.

The cross-rail is secured to each of the supports by means of clamp-bolts 214 received through apertures-215 in the top wall of the cylin- 216 of the support and threaded into the cross-rail.

When the supports have been positioned and clamped in place, they are not again disturbed until the finishing operations upon the pair of members of the printing couple, instanced as the bed and the cylinder coacting therewith, have been completed. The cross-rail is merely turned upon the supports for presenting the tool thereon either to the bed or to the cylinder. This turning of the cross-rail is shown accomplished in Figs. 3, 4, 8 and 9, by means of causing the tongues 157, 158, to selectively register with the grooves 156. These tongues and the grooves, being parallel with each other, positionthe cross-rail for parallelism of cross-feeding movement of the tool, Whether presented to the bed or to the cylinder. This construction further forms a rigid construction in which the cutting function of the too-l is resisted by substantial means adjacent to the cutting edge'of the tool and constructed in such manner as to avoid yield and chatter. The cross-rail is represented as a heavy cored casting.

The clapper-box for supporting the tool is especially useful when finishing the bed for permitting the cutting edge of the tool to retreat upon retracting movement of the bed and causing the tool to return to cutting position upon advancing movement of the When the truing mechanism is transferred from one printing couple to the other, it is reversed end to end. I

I have found it desirable to remove the chips and refuse caused by the cuttingtool as soon as formed, in order to keep the surface being finished clear of chips and refuse, especially when employing the pressure devices hereinafter-described. For this purpose I prefer to employ a powerful suction device, comprising a month 221 adjacent to the tool. The mouth communicates with a channel 222, in an arm 223, secured at 224; to the tool-slide and having connection with a suitable suction device. to create a powerful suction in said passage. I As hereinbefore stated, it is one ,of the objects of my invention to'provide means whereby to true the bed in its printing relation, that is, while-in reciprocating rela-v peripheral surface of the cylinder shall be' a parallel relation. parallel with the axis of rotation of the cylinder. If it is desired to exert additional pressure upon the bed to additionally hold the bed down firmly upon its rollers or supports or to exert substantial printing pressure relation upon the bed during the correcting operation, I provide a presser device which exerts pressure upon the surface of the bed while the same is being finished.

' This presser device is instanced as including a cross-rail 228, having depending supports 229. Bolts 230, 231, pass through slots 226, 227, in the supports and are threaded into suitable threaded holes in the side frames, for adjustably fixing the supports to the side frames. These threaded holes may be the ones usually employed for attaching the inking roller hearings to the side frames. Rollers 232 are provided with trunnions 233, journaled in bearings 234 of forks 235, there being a suitable number of these rollers arranged crosswise of the bed for exerting pressure throughout the width of the bed.

Each of the forks is mounted on .-a plunger 236, movable axiallyin a bearing 237 of. the cross-rail 228, and prevented from turning therein by being provided with a key 238, received in a .slot 239 in the bearing. A. stem 241 extends from the plunger and has a heavy helical spring 242 received thereabout'within the bearing 237. A 'sleeve-nut 243 has threaded connection with the upper end of the bearing 237 the stems 241 being reciprooable in the sleevenut.

The hold-down device is instanced as independent of and as having no connection a tool-slide 191.

with the truing device, so that no vibrations of the pressure hold-down device may be communicated to the truing device.

While I have in Figs. 5, -8 and 9 exemplified a metal scraping tool or finishing tool, having a scraping or finishing edge, as the finishing tool of preferred form, it is obvious that other finishing tools may be employed, and that, for instance, a grinding prime. Thus I mount a grinding wheel 248 on a shaft 249 journaled in bearings 2500f part of an electric motor frame and the rotation of the grinding wheel accomplished by an electric motor 251, of which the shaft 249 may be the armature-shaft. This grinding may be accomplished either wet o-rdry,

as may be desired, suitable means being provided for preventing access of the grinding refuse into Working parts of the press,.and

the refuse removed by suction device similar These bearings may be to the suction device when employing the finishing tool.

The beds and cylinders are, during the truing operations, preferably operated by the means employed for operating the same in their printing functions. The cylinder 23 is shown rotating in the direction of the arrow a during its printing function. When rotating this cylinder during the truing op eration thereon, it is preferably rotated in opposite direction.

The entire widths of the supporting surfaces of the tympan and type-bed are preferably trued by my improved apparatus. When truing the bed it is preferable that the inking table thereof be removed, the pressure rollers bearing upon the supporting surface and the surface under the inking table during the truing operation. When truing the bed, its side bearers may also be removed.

The bearers of the cylinder and bed are reduced or corrected preferably while respectively on the cylinder and bed, to conform to the reductions or corrections made upon the cylinder and bed respectively. The reductions or corrections of the bearers are made by the same correcting devices used in correcting the denuded supporting surfaces of the bed and cylinder while still attached to the frame of the printing press, and while the bed and cylinder are respectively moved in substantial printing relation preferably by the operating parts of the printing press. The correction of the bearers of the bed may take place while the bed is held under sub stantial printing pressure.

The operative connection between the shaft 120 of the-fountain roller and the arm 182, for imparting an intermittent motion to the arm 182, may be accomplished as follows, referring toFigs. 13, 16, 17, 18 and 19.

The arm 182 has a bearing 254 about the shaft 120, and is held to said shaft by a collar 255, fixed to the shaft by a set-screw 256. A ratchet-wheel 257 is fixed to said shaft by a set-screw 258. A pawl 261 is pivoted to the arm on a pin 262 and is provided with a heel 263 and a tripper-pin 264. The pawl is arranged to be brought into engagement with one of the teeth of the ratchet-wheel for movement of the arm 182 in operating direction, and is arrangedto be moved out of engagement with said tooth at the comple tion of its operative movement,-the arm being arranged to be automatically returned to initial'position to be again engaged by a tooth of the ratchet-wheel .at the.next intermitterrt rotary movement of the shaft 120.

The extent of this intermittent rotary movement of the shaft 120 is adjustable by means of the cover-cam 134 in manner hereinbefo-re described. Means are therefore provided to correspond the engaging and disengaging moments of the pawl 261 with ratchet-wheel. I

shank 275, provided with a slot 276, through be engaged by the tripper-pin 264 on the pawl and thereby determine the moment of disengagement of the pawl from said ratchetwheel. A spring 269 is secured to the arm 182 and is provided with a hump 270 to cooperate with the heel 263 of the pawl to hold the pawl in engaged or disengaged relation.

A tripper-part 273 is provided with a tripper-face 27 4 to engage the t-ripper-pin in order to -re-engage said pawl with said This tripper-part is on a which a set-screw 277 is received, the setscrew being threaded in one of the walls of the inverted U-clamp 267, for adjusting the tripper-face 274 toward and from the vertical plane in which the shaft 120 is located. When the tripper-pin 264 strikes the tripperface 274, the heel 263 ofthe pawl is moved to the other side of the hump 270, on the spring 269, for holding the pawl in engaging relation with one of the teeth of the ratchetwheel. The dotted position of this pawl shown in Fig. 17 shows its position just prior to iits' tripped relation for engaging the paw Referring to Fig. 17, the intermittent rotary movements of the shaft 120 take place in the, direction of the arrow f for moving the arm 182 in operative direction as shown by said arrow, whereby an intermittent rotary motion is imparted to the cross-feed screw 171 in feeding direction.

At the end of this operative movement,

determined by the adjustment of the'covercam 134, the tripper-pin' 264 engages the tripper-cam 266 for disengaging the pawl from the ratchetwheel, although if desired, this engaging moment may take place prior to the end of intermittent movement of the ratchet-wheel in operating direction,

thereby providing additional adjustment of rotary movements of the arm 182, and consequent adjustments of the lengths of steps of feed of the cross-feed screw. I

Vhen the pawl has been disengaged from the ratchet-wheel, the arm 182 is automatically returned to. initial position, shown accomplished by means of a spring 280 having one end 281 received in a suitable aperture in the link 180, and its other end 282 received in a suitable aperture in the clamp block 267, an intermediate coiled portion 283 of the spring being received and positioned loosely about a bolt 284 fixed in said clamp.

Near the end of such return movement of the arm 182, the tripper-pin 264 strikes the tripper-cam 274 for again engaging said pawl with a tooth of the ratchet-wheel, preparatory to the next intermittent operative movement of the link 1 80. The springs cushion the return movements of the arm.

This cross feed screw is provided with attaching means for attaching a hand-crank for operating the cross feed screw by hand. and positioning the cross-slide thereon in any desired position. This attaching means is shown as a square end 286 on said. crossfeed screw.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is:

1. In apparatus for correcting a printing press, the combination of a member of a printing couple, means for mounting said member of said printing couple in substantialprinting relation, means for operating said member of said printing couple, a dressing tool, and guiding and feeding means for feeding said dressing tool across the supporting surface of said member of said printing couple.

2. In apparatus for correcting a printing press, the combination of a printing couple, means for mounting the members of said printing couple in substantial printing relation, means for operating a member of said printing couple in such relation, a dressing tool arranged to be presented toward said member while so operating for dressing the same, and means for feeding said dressing tool across saidsurface.

3. In apparatus for correcting a printing press, the combination of a printing couple, means for mounting amember of said printing couple in substantial printing'relation, means for operating said member of said printing couple in such relation, a dressing tool arranged to be presented toward said member while so operating for dressing the same, means for feeding said dressing toolacross said surface. a'ndpressure meansacting on said member.

4. In apparatus for correcting a printing press, the combination of a printing couple, means for mounting the members of said printing couple in substantial printing relation, supporting means for a cross-rail, a cross-rail mounted thereon, a tool-slide on said cross-rail and means for feeding said tool-slide lengthwise of said cross-rail.

5. In apparatus for correcting a print- 1 ing press, thecombination of a printing couple, means for mounting the members of said printing couple in substantial printing relation, supporting means for a cross-rail, a cross-rail mounted thereon, a tool-slide on slide on said cross-rail, means for feeding.

said tool-slide lengthwise of said cross-rail, and means whereby to present said tool-slide toward each of the members of said print-- ing couple while maintaining said supporting means in position.

7. In apparatus for correcting a printing press, the combination of a printing couple mounted in a printing press, support ing means for a cross-rail, a cross-rail mounted thereon, a tool-slide on said crossrail, means for feeding said tool-slide lengthwise of said cross-rail, reducing tool means for operation on said printing couple for correcting the same, and means for mountmg said reducing tool means on said toolslide for coaction with said printing couple.

8. In apparatus for correcting a printing press, the combination of a printing couple mounted in a printing press, supporting means for a cross-rail, a cross-rail mounted thereon, a tool-slide on said cross-rail, means for feeding said toolrslide lengthwise of said cross-rail, reducing tool means, and means for mounting said reducing tool means on said tool-slide for coac-tion with the respective members of said printing couple.-

9.. In apparatus for correcting a-printing press, the combination of"a printing couple, supports for a cross-rail, across-rail mounted thereon, a tool-slide on said crossrail, means for feeding said tool-slide lengthwise of said cross-rail, said supports and said cross-rail provided with eomplemental connecting meanswhere'by to turn said crossrail on said supports and secure said erosrrail'on said supportsin parallelism with.

each of the men'ihers of saidprinting. cou- 10. In an apparatus for correcting a printing press, the combination of a type-bed, means for supportingsaid type-bed in substantial printing relation, across-rail above said type-bed, atool-slide adjustable thereon, crosswise of said type-bed, and pressure means acting-downwardly on said type-bed.

11. In an apparatus for correcting a printing press, the combination of a member of a printing couple, means for operating said member in its printing press, a crossrail inadjacency thereto, a. tool-slide adjustable lengthwise of said cross-rail for cooperation with said member, means for operating said member, and means for feeding said tool-slide.

12. In an apparatus for correcting a printing press, the combination of a member of a printing couple, means for operat ing said member in its printing press, a cross-rail in adjacency thereto, a tool-slide adjustable lengthwise of said cross-rail for co-operation with said member, means for operating said member, means for feeding said tool-slide, and pressure means for said member,

13. In an apparatus for correcting a )rinting press, the combination of a memer of a printing couple, means for operating said member in substantial printing relation, a cross-rail in adjacency thereto, a tool-slide adjustable lengthwise of said cross-rail for co-operation With said member, means for operating I said member, means for feeding said tool-slide, an operating element of said printing press, and an operative connection between the latter and said feeding mechanism for said toolslide.

14. In apparatus for correcting a printing press, the combination of a printing couple, comprising a tympan cylinder and a type-bed, means 'for supporting said tympan cylinder and said type-bed in their printing press, means for imparting rotary movement to said tympan cylinder and reciprocating movements to said type-bed, supports for a cross-rail, means for securing said supports to the frame of theprinting press, a cross-rail, a tool-slide adjustable lengthwise of said cross-rail, positioning means between said supports and said cross-rail for positioning said cross-rail on said. support in a plurality of positions in angular relations to one another, whereby said cross-slide on said cross-rail is presented selectively to each said tympan cylinder and said type-bed;

15. In apparatus for correctinga printing press, the combination of a printing couple, comprising a tympan cylinder and a type-bed. means for supporting said tympan cylinder and said type-bed in their printing press, means for imparting rotary movement to said tympan cylinder and reciproeating movements to said type-bed, supports for a cross-rail, means for securing said supports to the frame of the printing press,

a cross-rail, a tool-slide, feeding means for feeding said tool-slide lengthwise of said cross-rail, positioning means between said supports and said cross-rail for positioning said cross-rail on said support in a plurali'ty of positions in angular relations to one another, whereby said cross-slide on said cross-rail is presented selectively to each said t mpanieylinder and said type-bed, an operating element of said printing press, and connecting means between said operating element and said feeding means whereby to intermittently operate said feeding means.

16. In apparatus for correcting a printing press, the combination'of a member of a printing couple, means for supporting said member in substantial printing relation in said printing press, means for operating said 'memberl in substantial printing relation, a cross-rail, a tool-slide, a suction device adjacent to saidLtool-slide, and means forfeeding said tool-slide and said suction device lengthwise of said cross-rail.

17. In apparatus for correcting a printmg press, the combination of a member of a printingcouple, means for supporting said member in substantial printing relation in said'printing press, means for operating said member in substantial printing relation, a cross-rail, atool-slide, a suction device adjacent to saidv tool-slide, means for feedingsaid tool-slide and said suction device lengthwise of said cross-rail, and a cross-rail provided with a plurality of com- .plemental ositioning -meanswhereby to position said cross rail in a plurality of relations to said supports for selectively presenting said tool-slide to each of said members of said printing couple.

19. In apparatus for correcting a printing press, the combination of a frame, a typebed, means for supporting said type-bed in substantial printing relation, means for reciprocating said type-bed in said substantial printing relation, a cross-rail, a tool-slide eedable there along, a second cross-rail independent of said first cross-rail, means for securing said second cross-rail to said frame, a plurality of'pressure devices on said second cross-rail, and means therefor for pressing said pressure devices upon said table.

20. In apparatus for correcting a printing press, the combination of a frame, atype- ,bed, means for supporting said type-bed in substantial printing relation, means for reciprocating said type-bed in said substantial printing relation, a cross-rail, a tgolslide feedable there along, a second cross-- rail independent of said first cross-rail,

. means for securing said second cross-rail to saidframe, a plurality of pressure devices on "said second cross-rail, means therefor for pressing said pressure devices upon said table, and suction means-having a mouth in adjacency to the tool position on said toolslide. Intestimony whereof, I have hereunto subscribed my name in the presence of two subscribing witnesses,

LESLIE W. OLAYBOURN. In presence of, a C. A. WESTBERG,

'Ron'r. B. HAlgLAND.

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