US810434A - Photomechanical printing. - Google Patents

Description

PATENTED JAN. 2a, 1906.

- H. L. REGKARD. PHOTOMEGHANIGAL PRINTING.

APPLIOATION FILED JULY 21,1905.

3 sums-sum 2.

M'ne'saeas 1n: muzms PETER: co., wasnmcmlv, n. c.

PATENTED JAN. 23, 1906. H. L. REOKARD.

PHOTOMEGHANIGAL PRINTING.

APPLICATION rILnn JULY 21, 1905.

3 SHEETS-SHEET 3.

THE mums Firsns co.. WASHINGTON, n. c.

end of the machineof'Fig. 1.

UNITED srArEs PATENT OFFICE.

HENRY L; REeKARn, on NEW YORK, 'N. Y., ASSIGNOR To ALBERT HENRY WALKER, TRUSTEE, or NEwYoRK, N. Y.

PHOTOMECHANIICFAL PRINTING...

Specification of Letters Patent.

Patented Jan. 23, 1906.

Application filed July 21, 1905. Serial No. 270,615.

cation and which are illustrated by the accompanying three sheets of drawings.

The object of this invention is to transfer ink or acid resist from flexible plates to metal rollers. The particular flexible. plate which is shown in the accompanyin drawings and which is mentioned in the folio tion is such a developed intaglio gelatin plate on a flexible" celluloid base as is described in the Ippers patent, No. 785,735, of March 28, 19.05, and in the Reckard atents, No.

. 788,377, of April 25, 1905, and 0. 794,551,

of July 11, 1905.

Figure 1 of the drawings is a plan view of my machine minus the weights, which are shown in .other figures as depending from the levers', which are partly broken away in Fig. 1. Fig. .2 is aside elevation of the right-hand Fig. 3 is a central lateral vertical section of the machine on the line a a of Fig. 1. Fig. 4 is an enlarged detailed vertical section on the line b of Fig.- 1. Fig. 5 is a detailed horizontal section on thelineccofFi.2. g

The strong an rigid frame of the machine is indicated by the numeral 1'. The flat and 'rigid horizontal table 2 is permanently screwed down on the top of the frame. The cylinder 3 turns on its horizontal shaft 4, be-

. tween the ends of the frame, in such a position that the table 2 is tangential to the pe riphery of the cylinder, as best shown in Fig. 3, where'the' table is shown as comprising-a thick castiron body and a thinner sheet-steel extension, both of which are indicated by the numeral 2 in that figure. The worm-gear 5 is keyed to the outer end of the shaft 4, and the cylinder is slowly turned through that shaft and that gear by means of the worm 6, the shaft 7 ,the bevel-gears 8, the shaft 9, and the crank 10. The annular gear 1 1, having a -pitch diameter slightly larger than the diameter of the cylinder 3, is bolted to the border of the right-hand end of that cylinder in the osition shown in .Fig. 1 and as indicated in ig. 4. That 'gear is provided in its border with the recess 12, with which the lockingwing descripbolt 13 may engage when the cylinder is turned into the position wherein that recess is exactly opposite to that bolt. The handle 14, by which the bolt can be withdrawn from the recess, and the spring 15, which thrusts the bolt into the recess, are shown in detail in Fig. 5. The rubber blanket 16 is permanently clamped down upon the periphe of the cylinder 3, which clampin is effecte by the holding-clamp 17, exten ing along one edge of the blanket and attached by screws passing throu h it and through the blanket into the cyli-n er, and by the stretching-clamp 18, extending along the op osite edge of the blanket and firmly fastene thereto and provided with a series of wires 19, extending therefrom to a series of pins 20, which pins are seated in the cylinder and when turned 0 crate to stretch the blanket tightly upon t e periphery of the cylinder in the same way that piano-wires are stretched in pianos. The develo ed inked flexible intaglio gelatin plate 21 is 01 at one of its edges bythe stationary clamping apparatus. (Shown in Figs. 1 and 3.) That apparatus consists of the steel strip 22 and of a series of screws 23, the unthreaded shanks ofv which pass through unthreaded holes'in that strip, and the threaded ends of which are tapped into the cylinder, and the shanks of which. are surrounded by spiral springs 24, between the surface of the cylinder and the under side of the strip 22., and the heads of which are provided with the pivoted cam-levers 25. The forward border of the gelatin plate is clamped down'upon the cylinder by thrusting its forward edge under t e rearward edge of the-steel strip 22 and then by turning the screws 23 down farther into the cylinder and then by movin the cam-levers25 down into the position s own in Fig. 3. That operation clam s the rearward border of the steel strip 22 mil down on the forward border of the gelatin p ate 21, because the forward and downwardly-curved border of the steel strip 22 operates as a fulcrum to enable the cam-levers 25 to press down the rearward border of the steel strip with great power. The opposite edge of the gelatin plate extends from the periphery of the cylinder 3 tangentially over the tab e 2, and it is clamped there by the movable clarhping apparatus. (Shown in Figs. 1, 2, and3'.) That apparatus consists of the 1 two steel amped down upon the rubber blanket I to. clamp the rearward border of the gelatin strips 26 and 27 and of a series of screws 28, the unthreaded shanks of which pass throu h unthreaded holes in, the strip 26, and t' e threaded ends of which are tapped into threaded holes in the strip .27, and the heads of which are above the upper side of the strip 26, and that apparatus consists, further, of the series of set screws/ 29, the threaded shanks of which are tapped'through' the strip 26 and the points of which impinge upon the upper side of the strip 27.' The rearward e go of the gelatin plate is clamped between :the strips 26 and 27 by thrusting it between their forward edges as far back as the'screws 28 and-by then turning the set-screws 29 so as the machine which carry the developed inked ,flesrible gelatin plate. T will now describe those parts which carry the metal roller, to the periphery of which it is the function of the machine to transfer ink from the gelatin plate.

i j The numeral ,35-indicates a journal-box whichis located between two vertical and opposite parts'iie and 37 of the right-hand endof the frame of "the machine. A similar journal-box 38 located between two verti cal parts 39 and '40 of the left-hand end of the frame of the machine, These two journalb'oxes carry the mandrel which carries the metal roller which is to receive ink from the gelatin plate. The journal-box has some appurtenances which the journal-box 33 does not have in addition to one appurtenance which is similar. in both cases.

The journal-box 35 issupported by the spiral s rin 41, which is located in the tube 42, ant both of those parts are located in a vertical hole 43 in the frame on the machine directly under the center of the journal-box 35. The tube 42 is surmounted by the block 44, on the upper side of which the journalbox 35 rests. The bushing 45 surrounds the mandrel46-and is removably fastened there- .to by the clamping-ring 47, which embraces the outer end of that bushing. The clamping-ring 48 also embraces the bushing 45 and constitutes a bearing to prevent endwise motion of the bushing in one direction, while endwise motion of that bushing in'the other direction is prevented b the disk 49, which is integral with the bus 'ng '45. That disk has the' recess 50 for the reception of the locking boltel. That locking-bolt recipror cates vertically in a bearing in the-frame oi the machine and is caused to move downward by the treadle 52, operating through the rod 53 and the lever 54, and it is caused i to move upward and into the recess 50 by the s ring 55 wheneverthe treadle is free and t e recess is opposite to the locking-bolt. The gear 56 is keyed to the-bushing 45 at the side of the disk 49, and it is held against endwise movement by the screw-ring '57,.

which ring-is screwed. upon the inner end of the bushing to the position shown in Fig.4.

The gear 56 meshes with the gear 11, and-it receives motion therefro-mand transrnits'it t0 the bushing 45 and thencetothe mand're'l 46. The journal-box 38 at the ether endv of the machine does not have anysuch appurtenances as the parts 47, 49, 56, and 57 and only has a clamping-ring 58, which corresponds with the clamping-ring 48 and which prevents inward endwise ,motion of the mandrel 46, around the. left 1- hand end of which it is clamped.

The numeral 59 indicates the metal roller which is to receive ink from the gelatin plate and which is removably fastened to the mandrel 46. That roller and that mandrel, together with the two journal- boxes 35 and 38 and their appurtenances, rest on the spiral spring 41 and upon a similar s iral spring under thejourn-al-box 38, which diiplicate s ring, together with its inclosing tube and ho e and the ,block surmounting that tube, are omitted irom the drawings as unnecessary to be shown. Those two springs being-only strong enou h to support those parts without much added weight and it being desirable to some times support them positively, a swinging supporting-block 60 is pivoted to the righthand side o1 the frame of the machine and a counterpart block '61 is pivoted to the lefthand side of the frame of the machine in the positions shown in Fig. 1. When those blocks are swung inward on their pivots, they pass under the journal- boxes 35 and 38, re

spectively, or even under the blocks 44, which support those journal-boxes, and they thus positively hold up the journal-boxes and their. appurtenances as long, as they remain there. The periphery otthc metal roller 59 is not arranged in accurate ordefinite predetermined cooperating relation to the printing-plate 21 either longitudinally or transversely, and the machine has no guide by which either of those'results can be accomplished. The printing-plate begins to print along an imaginary line extending lengthwise of the periphery of the roller; but the particular location of that line is not predeten mined and is left-to chance, for it is immaterial, and the ink is applied by the rin tingplate to the roller somewhere miiway between the ends of the roller; but the machine neither has nor re uires any guide for the ar curate longitudina centralization of that epis shown Fig. 3, of the drawings,

tudinal adjustment of those rollers in the printing ma When the me i down upon that plate with many times more pressure than can result from the weight of the roller and all the other parts which are supported by the springs under ti iournal boxes. That reat pressure isuec sary in ord er to transfer sufficient ink from the depressions in the intaglio elatin plate to the periphery of the metal roller. To produce that great downward pressure, a duplicate mechanism is provided at each end of the machine. That mechanism at the right-hand end of the machine is shown in Fi 2, and that at the left-hand end It is enough to describe that at the right-hand end of the machine, for both sets are alike and are designated by the same set of mu morals. I

The long'lever'dz is pivoted 'at one end to the part 36 of the frame of the machine, which pivot'is the fulcrum of the lever. Power applied to the other end of the lever 62 by means of the weig ts 53,-and the working point of that lever is between its ends, but many times nearer to its fulcrum than to its power. The work done by the lever consists in pressing powerfully down on the jUllrxltil," box That pressure is exerted through the screw-bolt 64, which is. tapoed vert'i' through the reverend through the r base-plate which is attached by a ball-an socket joint to th lower end of the screwbolt, so as to beiifted up therewith when the the journal-box is adjustable by means of changing the amount of the weight 63 and also by shifting its position upon the lever apparatus which exerts downward pressur on'the journal-box 38 m justed like that which exerts downwardprese on the journal-box 35, because both sexes must receive the same pressure as each other every time the apparatus is used, 1, hough that pressure will be varied at different times, according to the total pressure rethe machine to receive the metalroller, the,

weigl.=..ts 63 are removed from the levers 62,

border of the gear 11.

The amount oi": pressure exerted by this apparatus upon:

5 be adv" and those lovers are raised to an upright position. Then the mandrel 46 and all its appurtenances, including the journal-boxes 35 and are lifted bodily away from the frame of the machine and are temporarily placed on some other supporting structure. Then the clamp-ring 411. is loosened, so as to unclamp the bushing 45 from the mandrel 16, and thereupon that bushing and all the. arts which surround it are taken away from the mandrel; The metal roller 59 is then it ed and fastened in the position shown in lig. l by being passed over that end of the mandrel from which the bushing 45 and its appur tenances were temporarily removed and by being keyed or otherwise secured to the mini drel. Then those parts are returned to their main on the temporary support. The cylinder 3- is then turned to the position where the locking-bolt l8 enters the recess 12 in the In that exact position of the cylinder a re istry-mark exists or is made on the rubber b anket 16 lengthwise ofthe periphery of the cylinder and exactly opposite the mathematical axis of the space occupied by the mandrel 46 beforethat mandrel was removed from the frame of the machine. That registry-mark can be made by 9 drawing a line across the rubber blanket from a point exactly half-way between the upright parts 36 and 37 of the frame of the machine to a point exactly half-waybetween its upright parts 39 and 40, because the journalboxes 35 and 38 are both perfectly symmetrical having the axes of their journal-bearexactly midway between their sides. 'lhi egistry-mark indicates theexact locatio which is to be occu ied by the forward edge of the priuting-surace of the develo ed. and inked flexible gelatin plate whent at plate is thereafter placed and fixed upon the rubber blanket, A second registry-mark is also made across the rubber blanket exactly parallel to the first and nearer to its forward edge, the distance between the two being identical with the distance between the forward edge'of the printing-surface of the inked ge atin plate and a registry-mark made on the imprinting forward border of that plate. third registry-mark is also made on the rubber blanket across the second mark and at an exact right angle thereto and midway of the blanket, and this mark corresponds with a second registry-mark on the forward border of the gelatin plate. A registry-mark is also made on the table 2 on a line with the third registry-mark on the rubber blanket, and this table-mark corresponds with a mark on the rearward unprinting border of the gelatin plate. The rubber blanket and the table and the gelatin late being thus provided with registry-mar s, the forward border of the rubber blanket, with the forward edge of its inked printing-surface exactly over the first registry-mar on the blanket and with the two registr -marks on its forward border exactly over t e second and third registry-.

. tially over the table from its forward border and is "held there under tension exerted by.

the weight'34 through the cords and 31 andthe movable clamping ap aratus which is now attached to its rearwar border. I Themandrel 46 and its appurtenances are now lifted bodily from their temporary'resting' place and are replaced intheir position in themachine, with. the journal- boxes 35 and 38 resting on the blocks and spiral springs, which have been described as sup orting them. ,ln

that position-the metal ro ler 59 is held up and out of contact with the. inked gelatin plate, for there should be-no such'contact except durin the subsequent time in which the metal rol er is being rolled over the inked plate and except during the instants in which the 'metal roller is being lowered into such contact and raised away therefrom. The ls vers 62 are now turned down to their horizontal positions, with the base-plates 65 resting upon the journal- boxes 35 and 38, respectively;'but those levers do not add enough weight .to press the metal roller down upon the inked gelatin plate. That result occurs when the weights 63 are hooked at their pre' determined positions upon the levers 62, as shown in Figs. 2 and 3. At that time the lockin -bolt 13 is withdrawn from the recess 12 in t e border of the gear 11, and the locking-bolt 51 is withdrawn from the recess in the disk 4:9,so as to permit the turning of the cylinder 3 and the metal roller 59. There- I upon. the cranklll is turned in an anticlockwise direction until the metal roller has made exactly one revolution, at theend of which the spring 55 carries the locking-bolt 51 into the recess 50 in the disk 49, andthus steps will precisely encircle the metal roller. The

printing-surface of the elatin plate can be I given this precise length y making the trans:

luscent photograph V which produces that eraser rinting-surtace with precisely the same ength, and that result can be accomplished by properly adjusting thecaniera in which that photograph is made. At the end of the one revolution of the metal roller over the printing-surface of the gelatin plate the ink in'the depressed areas of the gelatin plate has been transferred to the periphery of the metal roller, or at leastenough ink from each of those areas hasbeen thus transferred to constitute a complete reproduction on the metal roller of the design or picture composed by the depressed and inked areas of the gelatin plate. In Fig. l of the drawings the inked gelatin'plate has depressed areas consisting of polka-dots. That figure represents the condition of affairs when the metal roller has made half of its one revolution. At that time half of its peri hery has taken up a full supply of ink from li sions from which ink was taken. That residuum of ink is represented by lines across each of those depressions. The undi'minished inks in those depressions in the gelatin plate which have not yet assed under the metal roller are represented polka-dots on the gelatin plate in Fig. l. As soon as the one revolution of the metal roller over the'inked gelatin plate is completed and the machine has automatically stopped at the end of that revolution the weights 63 are instantly unhooked from the levers 62 and those levers are raised to upright positions. Thereupon the spiral springs under the journal-boxes 35 and '38, respectively, automatically raise the now inked metal roller away from the gelatin plate and the work of the machine is completed. The mandrel 46 and all its appurtenances, including'thc inked metal roller, are then lifted awayirom the machine, and the clamping-ring i? is loosened and the bushing 45 and all the parts which surround it are taken away from the mandrel, and then all of the gelatin plate, but has left a little ink in each of the depres-.

by the full black the inked'rnetal roller is removed from the 1 in length to the circumference or a particular I metal roller even where the original design or picture lIOHLWlilClTtl'lflt gelatin plate was made does not thus conform, is also true that r for other reasons is sometimes necessary to use metal rollers of different circumferences at diiierent times. This machine is adapted to receive and ink several different sizes of such roller; but there must be a separate gear 56 diameter of the "metalrollerused therewith gelatin plate may be stretched away tangentially into space from the periphery of the cylinder 3 by 'meansso-f the movable clamping apparatus (shown in Figs. 1, 2, and 3) and by means of the cords and 31 and the weight as it is drawnforwardzagainst the resistance of- 34, which are attached to that apparatus, or, the table being omitted from the machine, the flexible inked gelatin plate may be clamped down on the rubber blanket at its rearward border inaddition to being thus clamped at its forward border; but it is best to clamp the gelatin plate down upon the rubber blanket 0111 at the forward border of the gelatin plate an to leave the body of the gelatin plate to be bent upon the periphery of the cylinder the Weight 34 by the cylinder as it turns.

The rubber blanket may be omitted from the machine and the elastic foundation of the gelatin plate may be otherwise provided in 1 some cases, and in some few cases such afoundation-inay be omitted entirely.

The details of this machine, as shown in the drawings, conform to the first and only machine of the kind which has ever yet been built as far as I know. That machine has -'stood the test of actual use and appears to be altogether effective and convenient; but the deta1l's of some or all of its parts can probably be changed in several wayswithout substan tially a ectin its essential character. For these reasons do not confine my claims to narrowgrounds.

I claim as my invention- .1. The combination of a cylinder, adapted to turn one direction on its axis, and havplate; and a table'adjacent to the cylinder,

and adaptedto support the rear part of that plate, at thebeginning of the turning of the i cylinder, and to gradually surrender that plate to the cylinder, as the cylinder turns;

and a wei ht, attached to'the rear. border of the flexlb a plate,- and subjecting to tension the forward movement thereof; and a pair of levers and weights, adapted to exert ressure onthe fournal-boxes of the metal rol er, as it rolls; a l substantially as described.

2. The combination of a cylinder, ada ted to turn in one direction on its axis, and av ing an elastic cushion affixed to its periphery,

and having a-flexible plate affixed on that cushion;.and a. metal roller, adapted to turnin the other direction onits axis, at the same surface speed as the flexible plate, and with its periphery rolling upon the surface of. that plate; and a table adjacent tothe cylinder, and adapted to support the rear part of that plate. at the beginning of the turning of the cylinder, and to gradually surrender that .plate to the cylinder, as the cylinder turns;

and a Weight, attached to the rear border of the flexible plate, and subjecting to tension the forward movement thereof; all substantially as described.

3. ihe combination of a cylinder, ada ted to turn in one direction on its axis, and aving an elastic cushion afiixed to its periphery, and having a flexible plate aflixed on that cushion; and a metal roller, adapted to turn in the other direction on its axis, at the same surface speed as the flexible plate, and with its periphery rolling upon the surface of that plate; and a table ad acent to the cylinder, and adapted to support the rear part of that plate, at the beginning of the turning of the cylinder, and to gradually surrender that plate to the c linder, as the cylinder turns; and a pair of evers and weights, adapted to exert pressure'on the journal-boxes of the metal roller, as it rolls all substantially as described; g

4; The combination of a cylinder, ada ted to turn in one direction on its axis, and aving an elastic cushion aflixed to its periphery, and having a flexible plate aflixed on that cushion; and a metal roller adapted to turn in the other direction on its axis, atthe same surface speed as the flexible plate, and with its periphery rollingl upon the surface of that late; and a weig t, attached to the rear border of the flexible plate, and subjecting to tension the forward movement thereof; and a pair of levers and weights, adapted to exexer-t pressure on the journal-boxes of the metal roller, asit rolls; all substantially as described.

-cushion; and a metal roller, adapted to turn in the other direction on its axis, at the same surface speed as the flexible plate. and with its periphery rolling upon the surface of that plate; and a table ad acent to the cylinder, and adapted to support the rear part of that plate, at the beginning of the turning of the cylinder, and to gra ually surrender that plate to the cylinder, as the cylinder turns; all substantially as described. l

6. The combination of a cylinder, ada ted to'turn in one direction on its axis, and aving an elastic cushion afiixed to its periphery, and having a flexible plate afhxed on that cushion, and a metal roller, adapted to turn in the other direction on its axis, at the same surface speed as the flexible plate, and with its periphery. rolling upon the surface of that ill plate; and a weight, attached to the rear plate; and a table adjacent to the cylinder,

and adapted to support the rear part of that plate, at the beginning of the turning of the cylinder, and to gradually surrender that p ate to the cylinder, as the cylinder turns; and a weight attached to the rear border of the flexible plate, and subjecting to tension the forward movement thereof; and a pair of weights and levers, adapted to exert res-sure on the ournal-boxes of the metal rol er, as it rolls; a l substantially as described.

8, The combination of a cylinder, adapted to turn in one direction on its axis, and having a flexible plate affixed on its periphery; and a metal roller, adapted to turn in the other direction on its axis, at the same surface speed as the flexible late; and with its periphery rollin upon t e surface of that plate; and a tab e adjacent to the cylinder, and adapted to support the rear part of that plate, at the beginning of the turning of the cylinder, and to gradually surrender that plate to the cylinder, as the cylinder turns; and a weight attached to the rear border of theflexible plate, and subjecting to tension the forward movement thereof; all substantially as described.

9.. The combination of a cylinder, adapted to turn in one dire tion on its axis, and having a flexible plate affixed on its periphery; and a metal roller, adapted to turn in the other direction on its axis; at the same surface speed as the flexible plate, and with its periphery rollin upon the surface of that plate; and a table adjacent to the cylinder, and adapted to support the rear part of that plate, at the beginning of the turning of'the cylinder, and to gradually surrender that plate to the cylinder, as the cylinder turns; and a pair of weights and levers, adapted to exert pressure on the 'ournal-boxes of the metal roller, as it rolls; all substantially as described.

10. The combination of a cylinder, adapted to turn in one direction on its axis, and having a flexible plate aflixed on its periphcry; and a metal roller, adapted to turn in the other direction on its axis, at the same surface speed as the flexible plate; and with its periphery rolling upon the surface of that plate; and a Weight attached to the rear border of the flexible plate, and subjecting to tension the forward movement thereof; and a pair of weights and levers, adapted to exert pressure on the journal-boxes of the metal roller, as it rolls; all substantially as de scribed. I

11. The combination of a cylinder, adapted to turn in one direction on its axis, and

having a flexible plate aflixed on its periphcry; and a metal roller, adapted to turn in the other direction'on its axis, at the same surface speed as the flexible plate; and with its periphery rolling upon the surface of that plate; and a table adjacent to the cylinder,

and adapted to support the rear part of that plate, at the beginning of the turning of the cylinder, and to gradually surrender that plate to the cylinder, as the cylinder turns; all substantially as described.

12. The combination of a cylinder, adapted to turn in one direction on its axis, and

having a flexible plate affixed on its periphsubstantially as described.

13. The combination of a carrier, having a curved carrying-surface ada ted to move through an arc of a circle, and aving a flexible printing-plate aflixed on that surface; and a metal roller, ada ted to revolve at the same surface speed as t e movement of the printin late on the carrierand with its erinhery rolling upon the surface of that plate; and

a weight attached to the rear border of the" flexible plate, and subjecting to tension the forward movement thereof; all substantially as described. i

14. The combination of a carrier, having a curved carrying-surface adapted to move through an arc of-a circle, and having a flexible printin -plate a'flixed on that surface; and a metal roller, adapted to revolve at the same surface speed as the movement of the printing-plate on the carrier, and with its periphery rolling upon the surface of that plate; and a tension device attached to one border of the flexible late, and subjecting it to tension, during t e movement thereof; all substantially as described.

15. The combination of a carrier, having a curved carrying-surface adapted to move through an arc of a circle, and having a flexible inked printing-plate aflixed on that surface; and a metal roller adapted to revolve at the same surface speed as the movement of the printing-plate on the carrier, and with its periphery rolling upon the inked surface of that plate, and having its circumference identical in measurement with the length of the inke; surface of the printing-plate, so that one revolution of the roller upon'the plate, will take ink from the entire surface of the plate, and so that the ink thus taken will precisely encircle the roller; all substantially as the inked surface of that plate; and means described. i for pressin the roller with great force upon 16. Thecombination of a carrier, having a the inked mtaglio gelatin printing-plate, in

curved carrying surface ada ted to move order to transfer sufiigient ink from the de- 5 throu h the are of a circle, and aving a fiexipressions in the plate to the periphery of the 1.5

ble in ed intaglio gelatin printin -plate afroller; all substantial] as described.

fixed on its surface and a metal roller, adapt-- HE RY L. RECKARD.

ed to revolve at thesame surface speed as Witnesses:

the movement of the printing-plate .on the ALBERT H. WALKER,

IO carrier, and with its periphery rolling upon FREDERICK O. HUNTER.

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