US2178639A - Rotary printing machine - Google Patents

Description

Nov. 7, 1939. F. c. MARQ UARDT 2.178.639

ROTARY PRINTING MACHINE Filed May 28, 1938 3-Sheets$heet l 64 M j, i 6;?

0'5 v a? 71 as J @MFWW 4w; ATTORNEY Nov. 7, 1939. F. c. MARQUARDT ROTARY PRINTING MACHINE Filed May 28, 1938 3 Sheets-Sheet 2 INVENTOR WWW 9;; ATTORNEY.

Nov. 7, 1939. F. c. MARQUARDT 2,178.639

ROTARY PRINTING MACHINE Filed May 28, 1938 3 Sheets-Sheet 3 Patented Nov. 7, 1939 UNl'i' mi i s a PA ti l r Application li lay 28, 1938, Serial No. 210,613

26 Claims.

The invention relates to rotary printing machines, and more particularly to a machine of this type for making impressions from engraved, intaglio or undersurface steel printing plates.

In printing from engraved, intaglio or undersurface printing plates, ink is applied to the entire surface of the plate, and this surface is then wiped and polished, the wiping of the plate serving to fill and pack the lines of the plate with. ink and remove surplus ink from the plate. The polishing of the plate is for the purpose of removing any ink which may be left upon the top or non-printing surface of the plate by the wiping cloths.

While, when printing from fiat plates, a wiping mechanism is used, the polishing of the plate is usually by hand. With a rotary plate, however,

mechanical wiping and polishing mechanisms must both be used, since the plate is inaccessible for hand polishing and the plate cylinder continuously rotates.

The bending of steel plates for use upon the cylinder of a rotary printing machine is not only a difilcult procedure, but one involving considerable expense and loss because of the accidental destruction of plates.

Rotary printing machines of the type to which the invention relates, were in use for many years prior to my present invention, and in such machines, as well as in machines printing from flat plates, there has been an accepted rule for many years that an effective wiping and polishing of the plate cannot be secured with a movement of the plate in excess of a rate of about seventy feet per minute.

In machines for printing from fiat plates it has been the custom for many years to use four plates upon the machine, in order to secure a suitable output, such machines with four plates, being capable of making about twelve impressions per minute.

In rotary machines, however, the practice has been to operate these machines at about eight revolutions per minute, and to use two or sometimes three plates upon each machine, in order to have an output of sixteen or twenty-four impressions per minute, eight impressions to each plate upon the plate cylinder.

In printing from engraved, intaglio or undersurface plates, the wastage due to an improper packing of the lines of the plate by the wiping and polishing cloths is always high, and the speed of operation of machines using such plates has been limited to the speed stated above because of limitations in the effective action of the Wiping and polishing cloths.

The pressures used in making impressions from the plates are very great, and the rapid breaking down of the make-ready upon the impression cylinder or D-roll has resulted in a substantial loss (ill. lill-l55) in the average daily output of such machines. The avoidance of rapid destruction of the makeready of the impression cylinder or D-roll has also been a factor in limiting the speed of operation of such presses.

With the use of high pressures, vibration about the machin is great, even at the speed of operation above indicated, and the intermittent engagement and disengagement of the impression cylinder or D-rol1 with the plate has been a large contributing factor in the development of such vibration.

It has long been endeavored to provide a rotary printing machine of the type to which the invention relates, having an output, with the use of a single plate, substantially equalling the output obtained with a plurality of plates.

Such a machine is disclosed in the patent to A. H. Smith, No. 1,511,307, by which machine it was attempted, by the use of a cylinder of small diameter, to increase the number of revolutions per minute of the machine without increasing the rate of movement of the plate beyond that which in multiple plate machines has been found to give satisfactory operating conditions.

The difiiculties encountered with the machine of the Smith patent were the inability to bend or curve the plates upon an arc of the short radius required by a plate cylinder of small diameter, and of securing a proper wiping and polishing of the plate with higher cylinder speeds.

With the above conditions in mind, I have produced a rotary printing machine using thereon intaglio, steel or undersuriace printing plates which, with a single plate, has an output of two or more times the output of the machines of this type heretofore used, when two plates were used upon such machines. This result has been secured by so constructing the wiping and polishing mechanisms as to minimize vibration in these parts, and irregular movement thereof due to inertia when reversing the direction of movement of the bars, and by reducing the reciprocatory speeds of these bars while in contact with the plates, although, as measured by the number of revolutions per minute of the plate cylinder, the number of reciprocations of said bars per minute is materially increased as compared with a machine operating at lower speeds.

In addition to the use of Wiping and polishing bars of light, rigid material having high compressive strength, I provide other attachments and adjustments ensuring a smooth movement of the bars, and adjustment devices permitting a proper timing in the operative moment of the difierent bars in order to secure an effective wiping action at higher speeds of the plate.

In order to reduce vibration resulting from wear upon the bearing ends of the Wiper bars and the bearings co-operating therewith, I provide a pressure i'ei a In eonjunetien W for maintaining nnife 'm pressure yteetingerea' of ti,

'piate cylinder i' hiiemeking an impression. This I adjustment is ere which is requii edbeeziuse efthe' varying'een V in' ciiffer ntpietes'ixiieh y I s xbe-used upon tl eplete eylincier n U s j r hav rieuncl,fn theec uelepeiiation i emaehineeinbedyingfu f H fthewviper mid pelisher bars, the provision ,of

special ferin efediuste blebearing ioreeehenci 6f eiea the plate 1100 1 the plate cylinder,

pelishe be: mechanisms 'beire'refeirezl tofli ro vicie accurate micro-men ieail; adjustment mean of the i impres he'entiiece Cylindeter' Jntien, that the eight of,

,nent of s uehyhere the, Speed 0 L1 L518 ns lhiliiii'llfiflhe piateeylinde1" with a Jenlin hwh teefjentpute the;

atirigqspeecl; I the controlling Ward its pimtin iz eniengrevei i Jenn ee ri pletee is the piopertpa eking of thelines Oi remove-,1 of all Tilhe' inventi n consists in the novel feetiires construction and. combination of; parts; here] l f after set ferth"anddeeeribed; endimore 'partzeup leily pointed out in the cleimshereto api ended.

Referring to the cilawings,

Fig. is siiiie elevation of the 'printihg'eeiipie thewiping and pelishing ineehanisms ,0? a

he invention "line embeclyinef-the intention;

6 the niechanisn' operating at eithef end of th impi 'eesion. Cfy t the platen of bar and. the plate upon the -plzite cylinder; e s i Y e I Fig. 8 is a cleteil View, partly broken away, of the ecljwting mechanism foreach of the eccentries upon the Ni 01' bar eccentric shaft and the iaft; and

construction thereof adjacent the pointfof en-- the wiper heijeepable of minute and accurate ed1- e ge e5 he plate F justment, se asto, develop and maintain a desired menhetween theplatensicarried hy "n9; and piliishing cloths and: the entir he details '01 the WlpGli and 'plzite ub'onithe rid' the tef onebar T819 i the machine contribute plate with ink}: and" e; in propel ik from the'tep or non-printing) ei faee of the ate; so es toevoicl smudgesiii on theimprint;

printin I, ftoiusepen impression cylinder; or -D-roli wh'ose cylinder.

is 2, similar sheet illiistreting the i ecip-i roeatione of the Wiper and polisher clothsine e,

e, eensiensecl planyiew ef the Dhell is aiietaiiiview upon enlarger scale of ie shaft, for securing a, proper 1e movements of said bars in relation ceunterweight for the ec I I 9 use detail View of a freg'menterypertion of the imp essien cylinder or Dwell, showing the Y eageme 1 of m5; filth 1 the" forwa lr senthe plate cylinder. 1

o "like "perts'throughout ne'nv ne d1 ings; all --perts nf 1 ien embe s 0i": thejpriht- 'm'l 'polisning mechanisms he impression cylinder efeuch' details form he tie 4 i ym gdiflm hes the lliefl in fixed bearings in; the

[upon zit-sheet oftpapei uncle:

aehineis indicated at" Iii; nism is pesitionedfet the le u fld'efllf saidxfig'ure has n ed; or;,epplyingffpqwerto cefrem to the inipi es V ere old and well known; 7 1e store are not, shown the;

ete cylinder and the 'ime pressiee eylindeivjor -D ro11 may. be vevei itbei,

e'ehinesiri which three pietes are need,

meme te Big single plate is used, while it is being; 'perL t-here is no pressure exerted upon theplate I neler by theimpzeesion cylinder 01" D roll. The

' dy of the impre sion 'eyli'ndes: qr Droll is m v I spacedinomthesnrfece of the plate cylindere 5 0 1 "1g. 7 is a deteil encl View, of one of the Wiper I f Oi pelisher hers 'snewing the, adjusting meeha-V nismfor regulating the'pressure relation between istanee approx the"thicknessof; the

; printing plate, but sufiiciently less than this dis" s I t ance to ensure thedevelopment of "the 118665 s ry pressures; Accuracy of adjustment of this the epei'etien of the meehine.

, In the machine shown 1 inthe drawings; two

.ing bars and. one polishing barere used, this i V l, Etfprectiee long vi oilcmed,in the "art. The 70/ e construction efeach wiper 101' polisher be; is the t 3 I oylindier 01'1 D-roll 32 or D-teli adjusting I I *ig'e; 55 vand fi, will later ell/ hate eq-opei atingjq e the imgression cyl nder"or D nali are sueh,m,, es tohavethe latte? ma? e2: "aim of" the pletecylinder g a'eo1n1nonpmetiee in i 5 ti 'Q i 'psgj s ito the gni e g e oi'the drawingsiitwiliy T-bepneteci t at thewipirig and; polishing of the plete eccurs whiiethe plate is passing about the v lot/ercircumferenceoftheplatecylinder; softha t 55 Whe tionjefl the membei'sef' the printing couple 55,

voids some of the vibrat on which develops with link connections known in the art and therefore not shown in the drawings.

. The wiper and polisher bars extend from side frame to side frame of the machine, below the plate cylinder. The opposite ends of each bar are provided with polygonal bearing portions. Each bar is provided with an enlarged platen head covered by several plies of felt or other suitable yieldable material permitting the wiping or polishing cloth to adapt itself to slight surface ir-= regularities or fiurries in the plate resulting from the bending or tempering of the plate. It is a common practice to use a single web of wiping material successively passing over the platens of the two wiping bars, and a single web of polishing material passing over the platen of the polishing bar.

The general arrangement heretofore described is old and well known, the structure shown in the accompanying drawings varying from corresponding structures used prior to the invention in the following respects:

ihe wiping and polishing bars are each made of a metal having a specific gravity lower than steel, but high compressive strength, this being a characteristic of certain aluminum alloys. The design of the bar is also such as to provide the desired stiffness intermediate the ends of the bars with a small mass of metal.

As shown in Fig. 2 of the drawings, the flattened extended head of the bar it is provided with a central, longitudinally extending web it merging into the bearing ends it and l"? which are polygonal in shape, to prevent any turning of the bar. The felt covering for the bar is indicated at it, several plies of that material ordinarily being used. By using light weight metal in the bar, and

limiting the mass of such material as much as is consistent with the retention of the desired strength in the bar, the moving inertia developed by the bar is reduced to a minimum and that vibration or tremble of the bar resulting in chattering, when reversing the direction of its movement is substantially eliminated. This feature is of major importance because slight chattering of the bar during its vibratory movement at the opposite ends of each stroke tends toward an imperfect wiping action. The inability to avoid such chattering, was one of the contributing causes limiting the speed of the machine, and the elimination of such chattering, therefore permits operation of the machine at higher speeds. In fact, as will more fully appear hereinafter, the machine of the invention may be operated at approximately four times the speed of the old type machines, the avoidance of such chattering, or of any hesitancy in the reversal of the movement of the wiper and polisher bars, being a material factor in the development of such higher speeds.

The wiper driving shaft is shown at i Q, and the eccentric shaft driving both wiper platens is shown at 26. The shaft Ell is connected with the shaft l9 by a speed reducing gearing 25, the speed ratio of said gears, in the form of the invention shown, being substantially ii to 8, with the shaft 2@ having the lower speed.

Carried by the eccentric shaft 28 are two eccentrics 22 and one adjacent each wiper bar. Power is transmitted from the eccentric 2?; to its wiper bar by a strap and link connection 2t, and power transmitted from the eccentric to its wiper bar by a strap and link connection The strap and link connection used is of old and well known construction.

Each eccentric 2223 is mounted for circumferential adjustment about the shaft 20 by a mechanism shown in detail in Fig. 8, to be later described herein.

While this adjustability of the eccentrics is topermit a desired setting of the eccentric when assembling the wiping mechanism, it is primarily for the purpose of permitting a differential setting of the two eccentrics 22 and 23 to time the movement of the wiper bars actuated from said eccentrics to secure a controlled crossing of the lines of wipe of webs fed across these bars in relation to each other, as shown in Fig. 4 of the drawings. This is done by advancing the stroke of one bar in relation to the other.

Carried by the shaft 26 is a counterweight 25, the greater mass of metal of which is preferably so positioned as to be most effective at each end of the stroke of the wiper bar. Because of the adiustability of one eccentric in relation to the other, the setting of the counterweight in relation to the eccentrics can be only approximate. This counterweight not only secures a balanced condition about the eccentric shaft, but also, at least partially, counteracts the weight of the wiper bars.

The first wiper bar is indicated by the reference numeral E ia in Fig. 1 of the drawings, and the second wiper bar by the reference numeral Mb.

The polishing mechanism embodies a single polishing bar Mo, driven from a polishing bar eccentric shaft 27 by means of an eccentric 28 and a connection, consisting of the usual strap and link construction 29, between this eccentric and the polishing bar.

The shaft ii is driven from a polisher driving shaft til. This shaft 36 preferably has a speed in relation to the shaft iii, in a ratio of 4 to 3. The shaft 2? is connected with the driving shaft 39 by the connecting gearing 38, the ratio of the gears of which is substantially i to 3. The e centric Ed is adjustably mounted upon the shaft 2'? by a mechanism corresponding with that used in mounting the eccentrics 22 and upon the shaft 2b. The adjustability of this eccentric is for the purpose of timing the polishing action in relation to the crossing of the lines of wipe of the wiper bars.

Carried by the shaft 2? is a counterweight 32 having the same construction and setting as the counterweight 26 upon the wiper shaft 28, and having the same action in avoiding vibrations in the polishing mechanism at the opposite ends of each stroke of the polishing bar.

While, with an eccentric and strap drive, there will be a varying speed of movement of the bars from one dead center to the opposite dead center, the use of counterweights, in the manner described, upon the eccentric shafts, will act much in the same manner as a flywheel in securing a smooth passing of the dead centers.

In the embodiment of the invention shown in the drawings, the shaft l 9 has approximately 22.5 revolutions, and the shaft 3% approximately 30 revolutions, to each rotation of the plate cylinder. With the speed ratio described between the shafts i9 and 3t) and the plate cylinder, and between said shafts respectively and the wiper and polisher shafts 29 and 2?, each wiper bar will have one full reciprocation with slightly more than five and one-half inches of travel of a plate upon the plate cylinder, and the polisher bar will have one full reciprocation with slightly over four inches of travel of the plate.

While, in actual practice, these conditions have given highly satisfactory results, so far as clean wining and polishing of the plate is concerned, it is obvious that the figures given are not critical. It may be added that when making thirty impressions per minute, the peripheral speed of the plate cylinder is approximately 260 feet per minute, or almost four times the speed of ordinary rotary presses of the type to which the invention relates. The various speed ratios given are suitable for even a higher speed than thirty revolutions per minute of the plate cylinder, however.

With speeds greatly in excess of those given, vibrations interfering with the proper wiping and polishing of a plate develop.

The stated number of impressions per minute is with the use of a single plate II.

The steel plate, with conditions as shown in the accompanying drawings, will extend throughout slightly less than one-quarter of the periphery of the plate cylinder, although such plates vary not only as to length but as to width.

The amount or" pressure exerted between the wiping web and the plate upon the plate cylinder is slightly greater than the pressure required between the polishing web and the plate. The latter is required oniy to remove any ink from th non-printing surface of the plate which has been left by the wiping web, while the wiping web is required to fill and pack the lines of the plate with ink in addition to removing, by absorption, excess ink from the non-printing or top surface of the plate.

While both the wiping and the polishing webs are advanced'for a short length following each wiping and polishing operation, the wiping webs become heavily saturated with ink, and this is relied upon in large measure to secure a more effective filling and packing of the lines of the plate. Such saturation of the wiping web, however, may result in slight ink streaks upon the top or non-printing surface of the plate, but these will be removed by the polishing web.

Another cause of excessive vibration in a machine of the type to which the invention relates, has been the result of violent impact between the makeready of the impression cylinder or D-roll at the rear of the recess in said cylinder, with the forward. edge of the plate. To avoid vibrations from this source, this edge of the recess in, or nose of, the impression cylinder or D--roll formed upon a curve of long radius merging into the periphery of the impression cylinder or D-roll in a manner to ensure a smooth, initial rolling contact between the makeready upon said cylinder and the forward edge of the plate.

This construction is shown at 33 in Fig. 9 of the drawings, the makeready sheets being shown at 34 and the outer blanket at 35. The manner of mounting the makeready upon the impression cylinder or D-roll is that commonly employed prior to the invention.

By making the portion or nose 33 upon a curve of long radius as described, the jar of initial impact between the impression cylinder or D- roll and the plate H is practically eliminated,

and damage to the makeready requiring stoppage of the machine to effect repairs, is avoided.

In a machine embodying the invention using extremely heavy pressures and operating at the high speeds of which the machine of the inven-' tion is capable, violent impact of the impression cylinder or D-roli and the plate upon the plate cylinder, due to a high speed of rotation of said cylinders, thus setting up continuing vibrations which interfere with the proper wiping and polishing of the plate, is avoided.

In Fig. '7, of the drawings, I have shown a view atone end of one of the bars l4a, Mb or Me of the pressure adjusting and regulating mechanism for each wiper or polisher bar, this mechanism being duplicated upon the opposite ends of eachwiper or polisherbar.

In machines prior to the invention, the bearing ends of the wiper and polisher bars passed through side bearing openings in the side frame of the machine and were mounted between an upper and a lower bearing member. The lower member was spring supported, and the upper member was acted upon by an adjusting screw by which the tension of the spring and the pressure relation between the platen and the plate, arising from the action of this spring, were determined. With this construction, the spring support for the lower bearing members, with impact of the forward edge of a plate with the head of a wiper or polisher ,banyielded, and tended to set up continuing vertical vibrations in the wiper and polisher bars which, with the operation of the machine at higher speeds, was found to interfere with a proper wiping and polishing of the plate and packing of the lines therein.

To overcome this difficulty, I provide rigidly supported bearings for the ends of the wiper and polisher bars, and control the pressurerelation between the platen of said bar and a plate upon the plate cylinder,by adjustment of the bearings for the ends of the wiper bar toward and from the plate cylinder, so that the pressure relation between the platen and the plate is determined by the setting of the bars and the flexibility or compressibility of the material of the platens carried thereby.

Referring to Fig. 7 of the drawings, the side frames of the machine are provided with bearing openings 36 for the passage of the ends of the wiper and polisher bars. Slidably mounted upon the frame of the machine at each bearing opening, by means of four posts 3?, is a top bearing plate 38 and a bottom bearing plate 39 of anti-friction metal. The top and bottom bearing plates 38 and 39 are attached to the posts 31 and have a close sliding fit with the bearing end [6 or ll of the Wiper or polisher bar.

Each movable bearing membercomposed of the posts 31 and the top and bottom bearing plates 38 and 39 is slidably mounted in relation to the side frame of the machine to permit them to be vertically adjusted to secure the desired pressure relation between the platen of a wiper or a polisher bar and a plate I l by an adjustable supporting mechanism permitting no vertical movement of the bearings after they have once been adjusted.

This supporting mechanism consists of an extension it carried by the lower bearing member, and having a T-slot 4| toward the bottom thereof. Mounted in this T-slot is the enlarged head 42 of a micrometer screw 63 having screw threads M co-operating with screw threads upon a vertically adjusted rack 45. This rack constitutes a part of an old and well known form of throwoff mechanism for moving the wiping and polishing bars out of their plane of engagement with the plate ll to permit the threading of the wiping or polishing web through the machine, and forms nopart of the present invention. Hence, it is not shown in detail.

Carried by the housing 46 for the rack 45 is an index finger 41 co-operating with a graduated sleeve 48 carried by the micrometer screw M. The screw M is provided with an actuating handle 49 by means of which the micrometer screw and the sleeve 48 carried thereby, may be turned to secure a desired minute adjustment of the wiper or polisher bar, as indicated by the graduations upon the sleeve it. The sleeve 48 is provided with a series of notches engageable with a spring lock member 54 for holding the micrometer screw against displacement as a result of vibration in and about the machine.

Acting upon the top bearing plate 38 is a spring 52 inclosing a spring stud 53 upon the bearing plate. The sole function of this spring is to take up any possible minute looseness between the block 40 and the head 42 of the adjusting screw, and it has no use in preventing the development of vertical vibrations in the Wiper or polisher bars as a result of the impact of the plate therewith. If desired, this spring may be dispensed with.

Another source of the development of vibrations in and about the machine which, prior to the invention, necessitated the operation or" the machine at low speed, was an inaccurate setting of the D-roll in relation to the plate cylinder. Curved steel plates and the position of these plates upon the plate cylinder during the makeready of the machine, may result in the surface of the plate, at one side, being spaced from the impression cylinder, a greater distance than at the other side. When the bearings for the arbors at opposite ends of the impression cylinder or D-roll are independently adjustable, it is difficult to properly regulate the pressure toward the opposite ends of this cylinder, particularly when it is understood that very heavy pressure must be exerted by the impression cylinder or D-roll upon the plate on the plate cylinder.

In the embodiment of the invention shown in the drawings, the arbors of the impression cylinder or D-roll are mounted in bearings 3 formed in a bearing block 55 slidably mounted in the side frames of the machine. Each bearing block is supported by a spring 56 which is a part of the impression cylinder or D-roll throwoff mechanism. It forms no part of the present invention and is not shown or described in detail, beyond the co-operating cams 5'5 operative upon each block, the relative movement of these cams in one direction moving the bearing block against the tension of the spring 56, and relative movement in the other direction permitting this spring to raise the bearing block so as to move the impression cylinder or D-roll out of the operative relation to the plate cylinder. One of these cams is actuated by a gear 58 carrying a stem 59.

Mounted in a screw threaded extension is a micrometer screw 60 co-operating with interior screw threads in said extension and acting upon the bearing block through the stem 59. Said screw is provided with ahead 55 having suitable openings therein for a wrench to be used in the manual actuation of the screw.

Carried by the screw adjacent said head 6! is a worm wheel 62, one face of which bears upon a bearing bracket 53 for a worm shaft fi l carrying two worms 55 and t6 co-operating respectively with the worm wheels at opposite ends of the impression cylinder or D-roll.

Carried by the micrometer screw below the bearing bracket 63 is a graduated collar 6? cooperating with which is a gauge finger 68.

Bearing upon the top frame of the machine is a lock nut 69 mounted upon the micrometer screw, this lock nut having an operating handle it. Between the lock nut and the portion of the screw adjacent the graduated collar is what is known as a safety collar ll slidably mounted upon the screw threads of the micrometer screw Bil.

The shaft E l has, in the length thereof, two universal joints l2 and it to permit the end portions of the worm shaft Md and 5th to be upon different vertical planes under conditions where a differential adjustment of opposite ends of the impression cylinder or D-roll is required.

Carried adjacent one end of the shaft E i is a collar i l having longitudinal channels extending th-erethrough, as indicated at it. This collar co-operates with a pin it carried by the shaft. Normally, this collar is so set that the pin it will engage the end of the collar and thus prevent the reaction from the worm screws imparting any longitudinal movement to the shai't. Ii the collar, however, is set so that the projecting ends of the pin '86 are in alinement with the slot 75, then by turning the shaft t l, even though the collar M be turned with the shaft, the reaction upon the worms 65 and fit will cause longitudinal movement of the shaft, which is permitted by the sliding of the ends of the pin it along the slots l5 in said collar it. This construction is for the purpose of permitting the worms (it and 83 to be disengaged from their respective worm gears 52, so as to permit the turning of the micrometer screw independently of the worm shaft.

It will be noted that when either screw 653 is turned independently of the portion of the worm shaft co-operating with the worm wheel 62 carried thereby, said worm gear will be brought to a different horizontal level from the other worm gear, as will one bearing 63 in relation to the other bearing 53. While this ensures the worm 65 or 65 upon the worm shaft being properly positioned in relation to its co-operating worm gear, irrespective of the relative position of said gear and the other worm gear, it is necessary to provide the universal joints l2 and it in the length of the shaft 64 to compensate for the different levels of the bearings 63 in relation to each other.

The shaft 84 is provided with a squared end, as shown, to permit the use of a wrench or handle in turning said shaft.

Mounted upon the wiper eccentric shaft Bil and the polisher eccentric shaft 2?, adjacent each bar, is a collar ll having a. bearing boss '58 concentric with said shaft. Rotatably mounted upon said bearing boss '58 is a member is having an eccentric portion co-operating with the strap 24, 25 or 29, having a head flange 88 provided with openings for a wrench. Secured to the bearing boss l8 by means of suitable screws is a clamp plate 8! bearing upon the flange 8d. The screws 82 lock the eccentric member 79 in any position in which it may be adjusted, through the clamping action between the plate 8i and the head flange 85. The plate 8! has a sliding fit with the eccentric shaft and is provided with suitable gauge markings adjacent the periphery thereof so as to permit accuracy in the adjustment of the eccentric.

By means of adjustable eccentrics as to each wiping bar, as well as the polishing bar, the timing in the relative movements of these bars may be adjusted in relation to any plate, so as to secure the most effective action of the wiping and polishing webs in relation to that plate. The

or the polishing is merely for the purpose of securing a desired movement of each in relation to the others in order. to determine the proper crossing point of the lines of wipe as to each in relation to the other. This is illustrated in Figs. 3 and 4 of drawings and will be explained when describing the operation of the machine in its entirety.

The operation of the herein described rotary printing machine is substantially as follows:--

The use of light weight wiper and polisher bars, of counterweighted shafts for reciprocating same, and of the various adjustment and actuating mechanisms described, avoids the develop,- ment of vibrations in and about the wiping and polishing bars to an extent to permit an efiective wiping and polishing of a plate with a speed of rotation of the members of the printing couple greatly in excess of that which was possible in machines of the type to which the invention relates prior to my invention.

Equalization. oi the pressure between the en tire contacti g area of the inalieready of the hem pression cylinder or Enroll and theplate, and between the wiper polisher platens and the plate, not only contributes toward the reduction of vibrations uiting in improper wiping and polishing of the but toward the making of perfect impressions .iroin the plate.

A proper timing of the d ciprocations the and polisher bars in relation to the ts" of the plate, and toeach other, permits a r ore effective wiping and polishing of the plate, and variation. in the wiping and pclisl'ling action vn plate bearing different designs.

The secured by he use of wiper and pollsher hrs of a metal, such an aluminum alloy, having low specific gravity compared with steel and greater flity as compared with other light weight materials, and the avoidance of chattering of su h bars by the use of coun terweighted eccentric shafts, been fully described heretofore.

The use of the various adjustment mechanisms will now be described.

During the malreready of the machine, it is necessary, after a plate has been mounted upon the plate cylinder, to adjust the wiper and polisher bar platens secure the proper development of the p s ure between said platens and the plate; to adjust the several eccentrics to secure a proper t ng o rec'lprocations of said bars, and to ad ust s 1. 1 roll relation. to late on he plate cylinder.

The speed of mo ent of too wiper and polisher hers is fixed by t at of the driving shafts l9 and Ell and the gear-ii and Si connecting said driving with the wiper and polisher shafts til and i As heretofor stated, the polisher shalt reater speed of rotation than the wiper shaft, but the reduction between the shafts l9 and by the gearing 2|, is less than that effected by the gearing 3% between the shafts Ill and 5d.

During the makeready of the press, a steel plate l l is mounted upon the plate cylinder in a position to have the forward edge of the plate engage the nose oi impression cylinder or D-roll when making each impression. lhe backing sheets at and the blanket of the D-roll are '"ect and return removeinent to the worm gears ride out of engagement with said worm gears,

amaess then mounted. upon the impression cylinder or D-roll it. Either the makeready of the impression cylinder or D-roli or the plate may vary in thickness in different portions thereof, although this variation will never be great.

The amount of inl: required by the depth and width of the depressed lines upon the plate will also vary in different plates, and in different portions as to each. These conditions sometimes require a different adjustment at opposite ends of npression cylinder or D-roll in order to establish the proper pressure relation between same and t" e plate to ensure the proper withdrawal of the from the lines of the plate when making impression.

During the makeready, the shaft @4 is actuated to bring both gauge rings at each end of the impres on cylinder or D-roll, to the zero position, thus bringing the arbors of said cylinder or D- roll into proper horizontal alineinent. The micrometer screw it of each wiper and polisher bar is then actuated to set the gauge sleeve 48 at the zero position, said bars being lowered by the throwoif mechanism including the rack 45, during this adjustment. No adjustment of the cocentrics is required at this stage of the makeready.

Power is then applied to the machine for a trial run. i

According to the condition of the impressions made, the following adjustments will then be made:-

The shat t is first actuated to impart vertical adjustment to the bearing blocks 55 by means of the wo ns and upon the worm shaft 64 ans "I11 carried by the micrometer screws ill opposite ends of the impression cylinder or D-roll. If it is found that a perfect impression is ecured by this adjustment, no further adjustment or" the impression cylinder or D-roll is required. If it found, however, that the pressure developed toward one end of the cylinder is not suniciently great, the collar 14 is brought to the position shown in Fig. 5 of the drawings, with. the slot therein alined with the pin '55, so that with subsequent turning of the shaft the worms and will impart no thus ermitting either screw to be actuated independentiy of the other until a proper presbut will merely I sure relation between the impression cylinder or lJ-roll and different portions of the plate is established.

ihe ends and S ill of the shaft will be brought to parallel horizontal planes with movement oi the bearing bracket 63 adjacent the micrometer screw 66 which has been thus independently actuated, this being permitted by the universal joints it and in the length of said shaft between said ends and Mb.

By a reverse longitudinal movement of the shaft fi l, accompanied by a turning movement of said shaft, said. worms G5 and may be re-engaged with both worm gears =2, so that if a subsequent variation of pressure between the impression cylinder or D-roll and the plate is required, the screws Gil operative at each end of said impression cylinder or D-roll may be simultaneously actuated by the turning of the shaft 64, either to increase or relieve the pressure.

When adjusting the impression cylinder or D-roll it, it should be disengaged from the plate 5 i, so that this adjustment is merely against the tension of the spring 55 acting upon each bearing frame 55. The development of pressure results from the power applied to the impression cylinder or D roll, following the engagement of the plate with the impression cylinder or D-roll. Such adjustments may be required during the run of the machine, due to changing conditions in the makeready of the impression cylinder or D-roll.

Accuracy in the pressure conditions between the impression cylinder or D-roll and the plate avoids any such minor distortion of the plate cylinder, or parts appurtenant thereto, which might interfere with the proper wiping and polishing of the plate, or the setting up of rhythmic vibrations in said plate cylinder.

It will be noted that while the impression cylinder or D-roll is adjusted against spring tension, the bearing frames 55 are held against upward movement as a result of the pressures developed by reason of the construction of the adjusting mechanism shown.

During the trial run of the machine, the inking mechanism, not shown in the drawings, is adjusted so as to apply ink to the entire surface of the plate in the quantity required by the design upon the plate.

The various wiper and polisher bars are then moved away from the plate cylinder by the throwofi mechanism operative thereon, and the various screws 43 actuated to bring the gauge sleeve 68 into zero position in relation to the gauge finger 41. While said bars are moved away from the plate cylinder, the wiping and polishing webs, one of which is indicated at A in Fig. 7, are

' threaded through the machine in the usual manner, one web passing about the heads of the wiping bars Ma. and Mb, and a second web passing about the head of the polisher bar Mic. The throwofl. mechanism is then actuated to move said bars toward the plate cylinder, and the micrometer screws 43 of each bar may thereafter be actuated to establish the proper pressure relation between the wiper bars and the plate upon the plate cylinder, as determined by the results secured during the trial run of the machine.

The adjustment of the various wiper or polisher bars may be made while they are either in or out of the engaging relation with the plate cylinder. The screws 33 operative upon the opposite ends of each bar may be differentially adjusted according to the conditions developed during the trial run of the machine.

The upper and lower bearings 38 and 39 for the ends of the bars are always in engagement with the bars, and by reason of the use of the posts 3?, move with the bars toward or from the plate cylinder. It will be noted that these bearings are so supported by the adjusting screw 43 that a bar can have no movement toward or from the plate cylinder after it is brought into the desired adjusted position, any yielding of the bar in relation to a plate resulting solely from flexibility in the pad I8.

As stated, the spring 52 acting upon the top bearing 38, has no function beyond the holding of the bearing frame in engagement with the head 4! of the adjusting screw, a condition, however, which will result fromthe action of gravity without the assistance of this spring.

The sleeve 48 with its graduations, permits a determination of the amount of adjustment at either end of a bar in relation to the other. These graduation marks represent .001 of an inch, and the spring lock member 5i is operative at intervals of .001 of an inch. Variation in adjustments of less than this amount is of no moment in securing the desired operation of the wiping and polishing mechanism.

While ordinarily, adjustment of the bearings at opposite ends of the bar will be the same, it is possible to vary the adjustment at one end to a smaller extent in relation to the other end, for the same reasons as adjustment of opposite ends of the impression cylinder or D-roll is sometimes necessary.

During the Wiping and polishing of the plate, the plate has angular movement and the wiper and polisher bars have movement axially or longitudinally of the plate cylinder. These two combined actions result in a wipe or polish, the action of which is from side to side of a plate with a component of action from end to end of the plate determined by the speed 01" the wiper or polisher bar and the speed of the press.

This condition is represented in Figs. 3 and 4 of the drawings. In Fig. 3, the curve of the wiping action of one wiping bar, as I ia, is shown in full lines at a; the curve of action of the other wiping bar, Mb, is shown in dotted lines at b, and the curve of action of the polisher bar is shown in dot and dash lines at c. The arrow 11 indicates the direction of movement of the plate, and the arrow 6 indicates the directions of movement of the various bars. In this figure, the curve is that developed in a rotary printing machine having eight revolutions per minute.

In Fig. 4, I have shown a similar diagram illustrating the wiping and polishing conditions in the machine of the present application, which has a speed of approximately thirty revolutions per minute.

The speeds above referred to are the revolutions of the plate cylinder.

The diagrams are shown in connection with a plate twenty-two and one-half inches in length in each instance, although the diagram would be the same irrespective of the length of the plate, since the curve represents the wiping and polishing operating conditions for each revolution of the plate cylinder.

In Fig. 4, the action of the wiping and polishing bars is indicated by the same reference charact-ers as in Fig. 3, as are the arrows indicating the two directions of movement of parts resulting in the curves shown.

Two pronounced differences are disclosed in these two diagrams. One of these is in the crossing point of the lines of wipe and polish, and the other is in the number of strokes per revolution of the wiping and polishing bars. It will borne in mind that these diiferences do not result merely in the change of the number or" revolutions of the plate cylinder per minute, since in each 1nachine represented by these diagrams, the curves would be the same irrespective of the number of revolutions of the plate cylinder because the wiper bar speeds of reciprocation increase proportionately to an increased speed of the plate cylinder. The wiper and polisher bars have a movement from side to side of the plate of approximately one inch, which is the component of movement represented by the arrows e.

In the form of the invention shown, the plate has an angular movement of about five and onehalf inches during each direct and return reciprocatory movement of the wiper or polisher bars, which is a right line movement. Under the conditions shown in Fig. 3, the plate has a movement of only four and one-half inches during one complete reciprocation of the said bars.

65 facilitate nicety intl e adjustment o It has been found, in actual practice, that condition shown in Fig. not ed iit a satisfactory Wiping and poll ing e1- plates when the piate cylinder has thirty UlUiE revo lutions per minute. a q p I It'vvill be noted that each of the curves in 3" 4 seems to he flatter than the curves shown in Fig.

3, because of the greater component of e ment due to circumferential travelof the plate or the angularmoveinent oithe plate cylinder. lhis condition secures both a more eiiective Wiping and a more eilectivepolishing o the 1g shafts and mid, er

tionof the plate cylin-s compa number of reciprccations of the polish polisher bar having number of recip rocations.

The angular moveinentof thepiatein relatioir to the Wiping bars, is efloctivc insccuring 3.9 er filling'and packing of the and net standing the increased IlJlTiilJQl revolutions p ,minute of the plate cylinder, w h the conditions shown in Fig. 4, as effective filling and sizing ,of the lines of the plate secured, notwi ing the" conditions shown in 3. r r p 7' The two Wiper bars Ma and 54b and thepolisher bar Mo are spaced'iroin each, ct 'er in t direction movement of the plate 40, ing and pols hinggand in order to crossing of the lines of Wipe, as .i: 4, a differential setting of the eco upon the respective hers is necessa v: In Fig, 3, a conditicn is shown 45, a hit and adjustment of sale.

which was found not to hei'effective vvh ing the machine at speeds, for "ma-chin this type. I To permit contrel of the of cross. the wipe, I have provided the eecen' ica mechanism, shown in F. 8; la and timing of each bar be a cu;v y, "altered to adapt these ticular plate. By loosening the the trio is may he turned upon boss '63, so as to c" the t ing cf the in, tion of each reciprocator y mo ment of any". a

' in relation to the other bars.

The collar 1? is secured to the sthe shaft 2'! so as to he revolul is then the eccentric 19 may he turned about the a, of said shaft 251 and locked inanyadjustcdposition means of the clamp plate at and the lock screws 82. if The gauge markings about the plate. I I

In a machine embodying invention,

positive support of the hearings tor the sp een e ends of each wiper or p oii'sher has p p development of rhythmic vibrations 1n j which will interfere With uniformity in. the ni and polishing conditions at al times Whi plate is in the operative"relatiorrtosaid ha The use of bars of material having low specific gravity, as compared with steel or OthEl IImtSJ-S the development of viorati a bar iorined oi an a" .gher speed oijthe asunder tne to the 'ctherato secure a des ous'wiper and pclishe b foperationr of the machine at high speeds,

[animportant factor. N v

which the plate is intermittently engaged with,

in: late ents thv s commonly used, and possessii eluding flexure of the e itial contact or" the edge of the plate with the bar or from the pressures devel pied mentoi piatesj \vith'tlic cc" head M of the bars, reduces th of these bars to anextent to per versal of their rcciprocatory movements wt" s or would interfere with the action upon the plate.

The use of the counter shafts 2i] and 2'! contributes toward end;

By'iorining the nose, ion cylin- '15 deror D-roll in a curve of long irad: of impact'betvieen thefo-ru'ard e V and the impression cyl nder or D-roll are reduced to a minimunnif not entirely elir hated, thus avoiding the development oi vihrauons in. the 20, members of the printing couplev ich' would tend to interfere with a proper action of the wipe ing and polishing Webs This h be n. If. d t be a contributing factor'in per. ntting the ping up of the speed of the machine in the manner 25 herein described. Elhe tWoiactors which. have been'found to coiitrihutemost toward the operation of the e of chatter "'2 direction of recipro- 3Q andpolisher bars, by the I rim-rum alloy or other during each ch metal having a low with steel, alone or COilFlCu. '1 the use of co eri'veights upon the wiper and polishe; cccenti shafts, and the'control or the nunil of ecipi-focations of the Wiper and polis each revolution of the fiatecylinder a V -g or the movement of each'of these a d of the 40 -gs for the 1e 'mcchanisin' shown, by j rrldcha rhyti/ tion of said hare is prevented lines of swiping action the The positive supp rt of the a'so and disengaged from, the impression cylinder or" D-ro1l the Wiping and polishing bars, the tendency toward the setting up of vibrations is a greater than with the operation of the machine 55 at lower speeds, and the various mechanisms hercndescrihedhave been found to operate suc-s I cessfully in reducing the amount of such vibrajticn to a point where a very high speed of the machine may be attained, alth cugh if'a speed in excess ofhetween thirty'ancl forty revolutions" per. minute is attained, vibrations interfering with aprcper Wiping and polishing or the plate may develop.

machine he ein described is particularly 5 p adapted for use With'one plate upon the plate Wipingand polishing mechanism is operative uponthe other plate. r

While the use of lightweight Wiper and polisher 1 bars, andthe provision of adjustment means for the timing of the reciprocation of said bars in 75 amass relation to each other will permit an increase in the speed of operation of a machine of the type herein described, the construction of the bearings for the ends of the various bars, the accurate adjustment of the impression cylinder or D-roll, and the form of the nose of the impression cylinder or D-roll each are contributing factors in securing the maximum speed of operation of the machine with a minimum of imperfect impressions.

It is not my intention to limit the invention to the precise details of construction shown in the accompanying drawings, nor to the use of all of the contributing features, it being obvious that such details of construction may be varied without departing from the spirit and scope of the invention, and some of the advantageous characteristics may be omitted and yet permit the operation of the machine at a higher speed than that heretofore attained by machines of this type.

Having described the invention, what I claim as new and desire to have protected by Letters Patent, is:

l. A rotary printing machine embodying therein a plate cylinder having a peripheral speed in excess of 175 feet per minute, an impression cylinder or D-roll, a wiping mechanism including therein a Wiper bar, a wiper shaft, and means whereby said bar is reciprocated from said shaft, a polishing mechanism including therein a polisher bar,. a polisher shaft, and means whereby said bar is reciprocated from said shaft, and means minimizing vibration of said bars from moving inertia upon reversal of the movements ,.,of said bars, including therein speed reducing gearing operative upon said shafts respectively,

whereby with high angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revolution of said plate cylinder, the wiper bar having one full reciprocation with substantially five inches of travel of the plate cylinder.

2. A rotary printing machine embodying therein a plate cylinder having a peripheral speed in excess of 175 feet per minute, an impression cylinder or D-roll, a wiping mechanism including therein a wiper bar, a wiper shaft, and means whereby said bar is reciprocated from said shaft, a polishing mechanism including therein a polisher bar, a polisher shaft, and means whereby said bar is reciprocated from said shaft, and

means minimizing vibration of said bars from moving inertia upon reversal of the movements of said bars, including therein speed reducing gearing operative upon said wiper shaft and speed reducing gearing operative upon said polisher shaft, whereby with high angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revolution of said plate cylinder, the polisher bar having one full reciprocation with substantially four inches of travel of the plate cylinder, the gearing operative upon said wiper shaft, and the gearing operative upon said polisher shaft, being rela- ,tively so proportioned as to impart a greater reciprocatory speed to said polisher bar than to said wiper bar.

3. A rotary printing machine embodying '"ierein plate cylinder having a peripheral speed in excess of 175 feet per minute, an impression cylinder or B-roll, a wiping mechanism including therein a plurality of wiper bars, a Wiper shaft, and a plurality of means upon said shaft and operative upon said barsrespectively,

whereby said bars are reciprocated, a polishing mechanism including therein a polisher bar, a polisher shaft, and means whereby said bar is reciprocated from said shaft, and means minimizing vibrations of said bars from moving inertia upon reversal of the movements of said bars, including therein speed reducing gearing operative upon said shafts respectively, whereby with high angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revolution of said plate cylinder, the wiper bar having one full reciprocation with substantially five inches of travel of the plate cylinder, and the polisher bar having one full reciprocation with substantially four inches of travel of the plate cylinder.

4. A rotary printing machine embodying therein a plate cylinder, an impression cylinder or D-roll, a wiping mechanism including therein a wiper bar, a wiper shaft, an eccentric upon said wiper shaft, a strap co-operating with said eccentric and with said wiper bar, and means whereby said eccentric may be adjusted about its shaft, a polishing mechanism including therein a polisher bar, a polisher shaft, an eccentric upon said polisher shaft, a strap co-operating with said eccentric and With said polisher bar, and means whereby said eccentric may be adjusted about its shaft, and means minimizing v.bration of said bars from moving inertia upon reversal of the movements of said bars, including therein speed reducing gearing operative upon said shafts respectively, whereby with high angular speed of said plate cylinder, said bars will have a plurality of sloW reciprocatory movements with each revolution of said plate cylinder.

5. A rotary printing machine embodying therein a plate cylinder, an impression cylinder or D-roll, a wiping mechanism including therein a plurality of wiper bars, a wiper shaft, a plurality of eccentrics upon said shaft, a strap cooperating with each eccentric and with a wiper bar, and means whereby each eccentric may be adjusted about its shaft to regulate the timing of the crossing of the lines of wipe, a polishing mechanism including therein a polisher bar, a polisher shaft, and means whereby said bar is reciprocated from said shaft, and means minimizing vibration of said bars from moving inertia upon reversal of the movements of said bars, including therein speed reducing gearing operative upon said shafts respectively, whereby with high angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revolution of said plate cylinder.

6. A rotary printing machine embodying therein a plate cylinder, an impression cylinder or D-roll, a wiping mechanism including therein a plurality of wiper bars, a wiper shaft, a plurality of eccentrics upon said shaft, a strap co-operating with each eccentric and with a wiper bar, and means whereby each eccentric may be adjusted about its shaft to regulate the timing of the crossing of the lines of wipe, a polishing mechanism including therein a polisher bar, a polisher shaft, an eccentric carried by said polisher shaft, a strap co-operating therewith and with said polisher bar, and means for adjusting said'polisher bar eccentric about its shaft to regulate the polishing action of said polisher bar with relation to the wiping action of said wiper bars, and means minimizing vibration of said bars from moving inertia upon reversal of the movements of said bars, including therein speed reducing gearing operative upon said shafts respectively,

and non-yieldingly supported in relation to said plate cylinder.

13. A rotary printing machine embodying therein a plate cylinder, an impression cylinder or D- roll, a wiping mechanism including therein a wiper bar, a polishing mechanism including therein a polisher bar, and means for imparting reciprocatory movement to said bars respectively, said wiper bar being formed of a metal having low specific gravity as compared with steel and high compressive strength, whereby with high angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revolution of said plate cylinder, and excessive moving inertia in said wiper bar will be avoided.

14. A rotary printing machine embodying therein a plate cylinder, an impression cylinder or D- roll, a wiping mechanism including therein a wiper bar, a polishing mechanism including therein a polisher bar, and means for imparting reciprocatory movement to said bars respectively, said polisher bar being formed of a metal having low specific gravity as compared with steel and high compressive strength, whereby with high angular speed of said plate cylinder, said polisher bar will have a plurality of slow reciprocatory movements with each revolution of said plate cylinder, and excessive moving inertia in said polisher bar will be avoided.

15. A rotary printing machine embodying therein a plate cylinder, an impression cylinder or D-roll, a, wiping mechanism including therein a wiper bar, a polishing mechanism including therein a polisher bar, and means for imparting reciprocatory movement to said bars respectively, said wiper and said polisher bars each being formed of a metal having low specific gravity as compared with steel and high compressive strength, whereby with high angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revolution of said plate cylinder, and excessive moving inertia in said Wiper and polisher bars will be avoided.

16. A rotary printing machine embodying therein a plate cylinder, an impression cylinder or D-roll, a wiping mechanism including therein a wiper bar, a wiper shaft, a counter-weight upon said shaft, and means whereby said bar is reciprocated from said shaft, a polishing mechanism including therein a polisher bar, a polisher shaft, and means whereby said bar is reciprocated from said shaft, and means minimizing vibration of said bars from moving inertia upon reversal of the movements of said bars, including therein speed reducing gearing operative upon said shafts respectively, whereby with high angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revolution of said plate cylinder.

17. A rotary printing machine embodying therein a plate cylinder, an impression cylinder 0r D-roll, a wiping mechanism including therein a wiper bar, a wiper shaft, and means whereby said bar is reciprocated from said shaft, a polishing mechanism including therein a polisher bar, a polisher shaft, a counterweight upon said shaft, and means whereby said bar is reciprocated from said shaft, and means minimizing vibration of said bars from moving inertia upon reversal of the movements of said bars, including therein speed reducing gearing operative upon said shafts respectively, whereby with high angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revolution of said plate cylinder.

18. A rotary printing machine embodying therein a plate cylinder, an impression cylinder or D- roll, a wiping mechanism including therein a wiper bar, a wiper shaft, a counterweight upon said shaft, and means whereby said bar is reciprocated from said shaft, a polishing mechanism including therein a polisher bar, a polisher shaft,

a counterweight upon said shaft, and means whereby said bar is reciprocated from said shaft, and means minimizing vibration of said bars from moving inertia upon reversal of the movements of said bars, including therein speed reducing gearing operative upon said shafts respectively, whereby with high angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revolution of said plate cylinder.

19. A rotary printing machine embodying therein a plate cylinder, an impression cylinder or D-roll, a wiping mechanism including therein a wiper bar, a wiper shaft, a counterweight upon said shaft, and means whereby said bar is reciprocated from said shaft, a polishing mechanism including therein a polisher bar, a polisher shaft, and means whereby said bar is reciprocated from said shaft, and means minimizing vibration of said bars from moving inertia upon reversal of the movements of said bars, including therein speed reducing gearing operative upon said shafts respectively, said wiper bar being formed of a metal having low specific gravity as compared with steel and high compressive strength, whereby with high angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revolution of said plate cylinder, and said counter-- Weight will be made more effective in avoiding excessive moving inertia in said wiper bar.

20. A rotary printing machine embodying therein a plate cylinder, an impression cylinder or D-roll, a wiping mechanism including therein a wiper bar, a, wiper shaft, and means whereby said bar is reciprocated from said shaft, a polishing mechanism including therein a polisher bar, a polisher shaft, a counterweight upon said shaft, and means whereby said bar is reciprocated from said shaft, and means minimizing vibration of said bars from moving inertia upon reversal of the movements of said bars, including therein speed reducing gearing operative upon said shafts respectively, said polisher bar being formed of a metal having low specific gravity as compared with steel and high compressive strength, whereby with high angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revolution of said plate cylinder, and said counterweight will be made more effective in avoiding excessive moving inertia in said polisher bar.

21. A rotary printing machine embodying therein a plate cylinder, an impression cylinder or D-roll, a wiping mechanism including therein a wiper bar, a wiper shaft, a counter-weight upon said shaft, and means whereby said bar is reciprocated from said shaft, a polishing mechanism including therein a polisher bar, a polisher shaft, a counterweight upon said shaft, and means whereby said bar is reciprocated from said shaft, and means minimizing vibration of said bars from moving inertia upon reversal of the movements of said bars, including therein speed reducing gearing operative upon said shafts respectively, said wiper and said polisher bars each all) being formed of a metal having low specific grav-u ity as compared with steel and high compressive strength, whereby with angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revo said shaft, an eccentric upon said wiper shaft and astrap cogoperating with said eccentric and with said wiper bar, polishing mechanism including therein a pplishel' bar, a polisher shaft, a counter- 3 weight upon said shaft,an eccentric upon said polishershaft, and a strap co-operatingwith said eccentric and with said polisher bar, andmeans minimizing vibration of bars from moving inertia uponreversal of the movements of said bars incIuding thereinspeed reducing gearing ope "ativeuponsaid shafts respectively, said wiper and polisher oars each being formed oi metal having low specific gravity as compared with steel and high compressive strength, whereby with high angular speed of said plate cylinder, said oarswill havea plurality of slow reciprocatory movementswith each revolution q ments of saidbars, including therein speed reof said plate cylinder, and saidcounterweights will be made more effective in avoiding excessive 7 moving inertia said wiper and polisherbars,

"rotary printing machine embodying 23. 'A therein a plate cylinder, an impression cylinder or D-roll, the 'portion of said impressioncylinder or I D-roll which initially engages a plate upon said plate cylinder being formed in an arc of long radius, wherebyvibration resulting from the jar of contact of said impression cylinder or, Dsroll with the forward edge of a plate is minimized, a

wiping mechanism including therein a wiper bar,

I a wiper shaft, and means whereby said bar is reclprocated from said shaft,-a polishing mechaa nism including therein a polisher'bar, a polisher shafts respectively, whereby with high angular speed of said plate cylinder, said bars will have aplurality of slow reeiproeatory movements with I each revoiution of said plate cylinder.

posits ends of said impression cylinder or D-roll, adjusting means operative upon said bearings respectively, 'an actuating mechanism simultaneously operative upon botlroi saidladjusting means including therein means whereby the portion of said actuating mechanism engageable with said adjusting means respectively may move vertically with the adjusting means into different horizontal planes, a wiping mechanism including thereina wiper bar, a wiper shaft, and means whereby said bar is reciprocated from said shaft, 7 a polishing mechanism including therein a polisher bar, a polisher shaft, and means whereby said bar is recipl'ocated from said shaft, and

rotary printing machine embodying therein plate cylinder, an impression cylinder 3 or D-roll, vertically movable bearings for the pmeans minimizing vibration of said bars from moving inertia upon reversal of the movements of said bars, including therein speed reducing gearing operative upon said sha ts respectively,

ivhereby with highangular speed of said plate (cylinder, said bars ,willhave a plurality of slow reciprocatory movements with each revolution ofsaid plate cylinder.

25. A rotary printing machine embodying therein a plate cylinder, an impression cylinder or D-roll, vertically movable bearings for the opposite ends of said impression cylinder or D'- roll, adjusting means operative upon said bearings respectively, an actuating mechanism simultaneously o'perativeupon both of said adjusting means, means whereby said actuating mecha nism may be selectively engagedwith, or disengaged from, said adjusting means respectively,

means includedin said actuating mechanism whereby the portion of saidactuating mechanism engageable with said adjusting means respectively may movevertically with the adjusting means into difierent horizontal planes, awiping mechanism including therein a wiper bar, a wiper shaft,and means whereby saidbar is reciprocated from said shaft, a polishing mechanism including therein a polisher bar, a polisher shaft, and means whereby said bar is 'reciprocated from said shaft,

, and means minimizing'vibration of said bars from moving inertia upon reversal of the moveducing gearing operative upon said shafts respectively, whereby with high angular speed of said plate cylinder, said bars will have a plurality of slow reciprocatory movements with each revolulicn of said platecylinder'. g I g g 26. A rotary printing machine embodying therein a plate cylinder, an impression cylinder posits ends ofjsaid impressioncylinder or D-roll,

worm wheels respectively,

worm wheels respectively, means whereby said worm shalt may be flexed intermediate said bear ings, means permitting disengagement of said worm shaft from, or its engagement with, said worm. wheels, wherebysaid micrometer screws may be independently actuated or simultaneousiy actuated, irrespective of the vertical positionof I or D-rollj vertically movable bearings for the "012- i the worm wheels upon said micrometer screws,

to regulatethe pressure'relation between said im- "pression cylinder or D-roll and a plate upon said plate cylinder, a wiping mechanism including therein a wiper bar, a wiper shaft, and means whereby said bar "is reciprocated from said shaft,

apolishing mechanism including therein a polisher bar, a polisher shaft, and means whereby means minimizing "vibration of said bars from movinginertia upon reversal of the movements of said cars, including therein speedreducing gearing operative upon said shafts respectively.

said plate cylinder.

FRANK o. MARQUARDT.

said bar is reciprocated from said shaft, and a

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