US1026935A - Printing-press. - Google Patents

Description

0. A. STURTEVANT.

PRINTING PRESS.

APPLICATION TILED 00121.9, 1909.

Patented May 21, 1912.

3 SHEETS-SHEET 1.

U. A. STURTEVANT.

PRINTING PRESS.

APPLICATION FILED 00'1219, 1909.

Patented May 21, 1912.

'3 SHEBTS-SHEBT 2.

lfiii h entor /M I Atty.

C. A. STURTEVANT.

PRINTING PRESS.

APPLICATION TILED 001210.1909.

3 SHEETSSEBET 3.

54. 5a 56 H 6'. H

M Wventor:

(At U Patented May 21, 1912.

UNITED STATES PATENT OFFICE.

CHARLES A. STURTEVANT, OF PLAINFIELD; NEW JERSEY. ASSIGNOR TO AMERICAN BANK NOTE COMPANY, A CORPORATION OF NEW YORK.

PRINTING-PRESS.

Specification of Letters Ifatent.

Patented May 21, 1912.

Application filed October 19, 1909. Serial No. 528.496.

and State of New Jc1-scy, have invented certain new and useful Improvements in Printing-Presses, of which the following is a specification, reference heing had therein to the accompanying drawings, which t'orm a part thereof.

My invention relates to printing presses, and more particularlyto the wiping and polishing mechanism for iuuler-surfiu-e or engraving printing presses.

In flat bed engraving printing presses.

the machines are so constructed as to atiord' an interval wherein the plate is accessihle to the pressi'nan, ust prior to the taking ot the imprint in order that the plate may be carefully inspected by the pressman and receive a final hand wiping whenever necessary. This arrangements results from the frequent failure of the wiping mechanism to remove all of the surface ink from the plate, which ink, if the plate were permitted to pass to the D-roll, would produce a mot tl ed imprints This necessity results in trequent stoppage of the press to etl'ect this final hand wiping, with a consequent loss of capacity in the press. In this type of press, the wiping mechanism consists of a wiping cloth, a portion of which is maintained in a condition of partial saturation with ink, in order, by a process known as packing, to retain sufficient ink in the cuts to productva perfect imprint, leaving a. residuum o't' superficial. ink upon the plate which must he removed hy the polishing cloths. To secure the thorough wiping ot the plate, it is necessary to bring both the wiplng and polish ing cloths into intimate contact thcrcwith,-

and to force them into this contact under considerable pressure to secure high ellifor under-surface or engraving printing presses which will lave sutlicient elasticity to adapt ltseltf to irregularities in a plate,

thus permitting the wiping cloths to he applied to the plates with a pressure sutlicicnt to insure the thorough wiping thereof while avoiding wear upon the plates at any one point. r

A further oh icct is to provide a wiping aml polishing mechanism for [under-surface. or engraving presses wherein the resiliency of the platen over which the wiping or polishing cloth passes, may he adjusted to regulate the pressure exerted upon a plate thercthrough, without materially all'ceting the intimate contact hctwcen the wiping cloth and said plate.

A still further ohject. is to provide a wiping and polishing mechanism for undersuri'ace or engraving presses wherein, it' dcsired, the platen may he so adjusted as to gradually increase the pressure exerted upon the plate, with the traverse thcreol' relative to the wiping cloth, to cause the fresh portion of the cloth to remove only that portion of the ink nccessarv to leave surface ink upon the plate in sullicicntv quantity to in sure the packing ol the intaglio lincs hy the soiled portion oi the cloth and completing the wiping with that portion of the cloth which has hccn used for wiping purposes the greatest length of time, and thus have its ahsorptivc properties so exhausted as to insure the proper packing of said lines.

A still further object is to provide a wiping and polishing mechanism for under-surface or engraving presses wherein, it dcsircd, the hcightoo't' the platen for the wiping cloth may he so regulated as to cause the cloth contacting with a plate to hecome soiled to a greater cvtcntv proportiomitc to the position of said cloth in the plane of movement, and in the direction oi traverse, oi the plate heing wiped.

A still further object. is to provide a wiping and polishing mechanism for under-surface or engraving presses wherein the wiping cloth and polishing cloth will have such moven'ient as to prevent the streaking ol' the plate due to any suhstantial movement ol? either ofthesc cloths co-incidentwith the movement. of the plate while in engagement therewith.

A still further object. is to provide a \riping and polishing mechanism for undersurlacc or engraving presses, wherein mechanically operated wiping and polishing cloths will remove ink from the surface of the plates and polish said plate in a man ner t o make a hand polishing thereof unnecessary to avoid an imperfect imprinttherefrom, thus increasing the capacity of a ress. j I

Aqstill further object 18 to prov de a wiping and polishing mechanism for under-' surface or engraving presses wherein the wiping cloth and the polishing cloth may be mechanism applied shown in said simultaneously driven, with a different movement however, so as to avoid the streaking of the plate through co-incidence in the movement of these two cloths.

A still further object is to provide a wiping and polishing mechanism for undersurface or engraving presses consisting of a wiping cloth support and a polishing one of which has a rotary cloth support, movement, and the other of which a direct reciprocating movement, and both of which are driven from the same source of power so as to insure a synchronous operation of these wipers. And a still further object is to provide a wiping and polishing mechanism for under-surface or engraving presses which may be quickly adjusted to vary the pressure exerted thereby to avoid wear both upon the plate and upon the platen over which the cloths pass.

The invention consists in the novel features of construction and combination of parts hereinafter set forth and described, and more particularly pointed out in the claims here-to appended.

Referring to the drawings :Figure 1 is a side elevation of my wiping and polishing to an ordinary fiat bed a portion only of the press being view; Fig. 2 is a section on the line 2-2 of Fig. 1; Fig. 3 is a section on press,

. the line 3-3 of Fig. 2; Fig. t is a vertical section of the Wiping platen and cloth show- I flatplate bed 15 moves, the sprocket chain C .being the means through which the plate bed is driven. In that type of press a portion of which is illustrated in the drawings, the ways A extend abouta rectanglc,the sides of which have thereon respectively the inking mechanism, the wiping and polishing mechanism, a cl ear field to permit the operator to inspect the plate and give a final wipe thereto, and lastly the D-roll and other imprint mechanism.

In the accompanying drawings, I have thereof, having a shown onlythatportion of the press incidental to the wiping and polishing of the plate; and a short run on the side thereof beyond this mechanism.

K Mounted above the ways A, is a frame I) supporting the reel E for the wiping cloth F; the reel G for the polishing cloth H; the rewindingreel I for bothsaid cloths, the wiping and polishing platen mechanisms to be more fully described hereinafter, and the various guides and pulleys incidental-to the H feeding of said clothsabout said platens. The frame D is mounted above the ways A by means of collars 7 upon opposite sides vertical opening therethrough respectively by means of which 001- lars the entire frame has a rotary movement upon a horizontal plane imparted thereto. Passing through to a disk 8 on each side of the machine are bolts 9. One disk 8 is driven by. means of an eccentric connection with a disk 10 mounted upon a vertical shaft-11 driven by means of the inter-meshing gears 12, the other disk 8 being an idler and serving merely as a guide.

13 is a bearing for the vertical shaft 11.

The amount of eccentricity of the connection between the disks 8 and 10 is not greatit being undesirable to have the wiper cloth and the disk have any substantially simultaneous movement in the same direction, as

this to a certain extentwould destroy uni formity in the action of the wiper cloth and might possibly lead to streaking of the plate.

Mounted in the lower portion of the frame D is the platen over which the wiper cloth passes, which platen consists of ari gid backing 1 1 preferably consisting of laminated wood (to secure strength and lightness) and a resilient facing adapted to force the wiper cloth F into engagement with the plate, indicated at J in Fig. 1. The backing 14: is supported from the frame D by means of the guide bolts 15, secured to said plates and mounted in vertical openings in cross bars 16 carried by said frame. Encircling these bolts are helical springs 17 acting upon seats formed by said cross bars 16 and blocks 18 carried by said backing 14. The function of the springs 17 is to normally project the platen downwardly to the full extent to insure the intimate contact of the wiper cloth with the desired degree of pressure, the rods 15 being capable of vertical movement with the platen against the tension of this spring to permit the platen to adjust itself to irregularities in a plate, or in different plates, four plates ordinarily beiii'g used upon the type of press shown in the drawings. These springs constitute a flexible mounting for the platen whereby it is adapted to have vertical reciprocation in its entirety, and are,so groupedlabout said these collars, and secured platen to secure a uniform pressure througliout same. This construction is old and well known in this art, my invention relating more particularly to means supplemental thereto for regulating the pressure exerted by said springs, and etpializing the pressure extended throughout the entire plate area.

Mounted on the under side of the backing H, are a plurality of independently expansible meu'ibers it), 20, and :21, having a semieircuh r cross-section, such members being n'e'l'erably three in number to secure a desirable area of eontaet surface of the wiper, said men'ihers extending from side to side .of the backing tt amttransversely of the plane of movement of the plate J, in order to secure a CUtlllllllOtlH bearing point or points along the entire plane. Each of these members is similar in its construction to the others, consisting of a straight. piece of, preferably pure rubber, tubing; (or it pre- -t'erred reinlorctal rubber may be used, although pure. rubber is preferable) the ends thereof being closed upon and sealed by a plug 22 (see Fig. ti), the ends of the tube beingtclamped upon rttltt plugs and said plugrebeing eemented or otherwise scoured to said tube. \Yhen so sealed, the tubes form straigl'itairtight cells. Pendant from the back it are flanges 23, 24 to which are secured, by means of screws, cleats 25, bearing upon the ends of the tubes and holding I them in position relative to the back It and tron]. li

passing under.

at the same time clamping these ends so tightly as to prevent the escape of air thereach f the tubes it). 20 and 21 is provider with an ordinary intlating valve 26, 27, 28, such as is commonly used on bicycle or automobile tires. the valve stems of which pass through the back l t with the valves and their caps exposed in order to readily admit of the inflation or detlation of the said tubes or any of them. A plurality of such tubes is employed, arranged in the manner desired, in order to permit the tubes to be inflated in ditl'erent' de 'rees tor the purpose of varying the pressure exerted by the wiper cloth at ditl'erent-points ot'.engagenient between the said cloth and' the plate. lendaut parting strips :29 and 30 between the tubes 11) and 2t). amt 2t and 21 respectively are provided to maintain said tubes in the proper relative position and confine the upper portion thereof within an area which will t-ause their intlation to project the lower face thereot' downwardly and permit; the unequal inllation ot' the tubes to vary the elevation of the. wiper cloth.

Extended from one side. of the pack it int-losing and drawn tightly over the lower ta e ot the. tubes ll 10 and "it and scoured to the opposite edge of the back It is a facing 11 of reint'oretwl rubber. le: ther or other iniila r material, possessing Mounted adjacent to the wiping mechanism is a polishing mechanism, the platen of which consists ot-a backing 34 preferably constructed in the same manner as the backing H which backing carries side flanges 35, 36, between which is seated an expansihle member 37, eonst rueted in the same manner as the members It), 20 aml 21 and having a valve 38 whereby the tube comprising the member 37 may be inflated or deflated to vary the level to regulate the pressure of the polishing cloth upon the plate. The ends of the member 37 are clamped upon the back 34 by means of the end cleats 3!) see Fig. 5). Secured to opposite sides of the top of the backing 34 and passing under and drawn taut upon the member 37 is a t'aeing -l() which may be of the same material as the facing 31. The ends of the back 34 are we tended beyond the member 37 and mounted in fixed hearings in a manner to limit the movement of the said polishing platen to a direct reciprocation transversely of the line of traverse ot' the bed plate 'B. These bearings consist. of brackets 41 and 42 secured to the frame of the press.'each carrying a in which the latter is mounted, by means ot" a tongue and slotconnertion 44 atl'ording that lost motion necessary to permit, the rotary movement of the wiper platen. While the brackets 41 are fixed, and the't'rame l) carrying one member of the-tongue and slot connection 44- is movable, nevertheless, the transverse movement of this frame and ot the member 37 will be the same, any longitudinal movement of the 'l'ran'ie relative to the brackets 41 and -12 being insullicient to disturb the relation of the polishing cloth H to said member. The tongue and slot eonneetion must be so constructed as to leave a clear field between the wiping and the polishing platens for the passage ot the polishing cloth. The feeding mechanism for the 17 by a friction clutch in the usual and well known manner. The wiper clot-h F passes v of the wiping and polishing cloths necessary frame D. The automatic take-up mecha- 1 ing cloth H is fed directly from this reel,

' bell crank lever 59, the rod and the spring pressed bell crank lever 61 one arm well known in this art, requiring merely .one wiping cloth which result from this 10' struction.

said cloths shown in the drawings is old and that adjustment necessary to reduce the: feeding movement of the cloths to effect that economy due to the saving effected by the more thorough wiping of the plates'due to the regulation of the pressure exerted by the wiper clothflzlnd the longer runs with saving. This mechanism consists .of feeding rollers 45 and 46' between which the wiper cloth F passes. Secured to one of these rollers, as i6, is a ratchet wheel 4'7 and mountedupon the shaft of this roller is a sprocket wheel 48 connected with the ratchet during the wiping and polishing interval. The re-winding reel I is driven from the roller 50 bymeans of the sprocket and chain mechanism 52. About both the sprocket wheels 48 and 51-is a sprocket chain 53 driven from the driving mechanism of the press, suflicient slack being present in said chain to permit of the movements of the nism 54 is provided said chain. r

55 is an ordinary guide roller. The reel G' is disposed aboye the polishing platen, and the previously dampened wipto take up any slack in back of the tongue and slot connection 44 to and under the facing 40 and then direct to the rewinding reel I. To prevent the over-- running of the reel G, I provide a brake or retard mechanism 56 of any desired con- Engagmg the ratchet wheel i7 is a pawl 57 adapted to normally engage the said ratchet wheel to overcome the friction clutch actuated by 'the sprocket wheel 48 and prevent the feeding of the wiper clot-h. This pawl is actuated by the chain 58, the

of which projects into the path of the bed B. The chain connection 58 forms a universal joint whereby the frame D may have movement in any direction relative to the means actuating said pawl.

The operation of tne herein described device is substantially as follows i lhe wip-"\ ing platen witlrits res lient or elastic facing having been assembled in the manner above described, it is apparent that the resiliency of the expansible members 19, 20, and 21 may regulated by their inflation or de-' fiation by means of their respective valves 26, 27, 28, and that such valves may be used as a medium varying the level of the platen, or of any portion thereof. Inasmuch as any variance desired would be very slight, such may be secured without forming slack in the facing 31. The said platen may thus be readily adjusted to any plate so as to secure only that pressure requisite.

to accomplish a thorough wiping thereof, thus eliminating excessive wear upon the plate" and upon the platen itself. In the first stages of the wiping of the plate it is undesirable with some plates to have the maximum pressure exerted by the wiping cloth; and the plurality or sequence of expansiblo members covered by a continuous facing permits the graduation of the plane of the entire wiper or the slight pitching ofthc facing 31, to gradually increase the pressure exerted by the wiper cloth upon the plate with the passage of the plate under said wiping platen. This variable pressure also prevents the. rapid fouling of that portion of'the wiper cloth first to engage the plate, thus having the last portion of said cloth to engage the plate, filled with ink to the cloth, which not only insures a more thorough packing of the intaglio lines, but permits the wiper cloth to be fed more slowly than would otherwise be required.

\Vhile the carriage D operates continu ously, the pawl and ratchet mechanism 17 and 57 prevents the feeding of the cloth until the bed B, by engagement with the arm of the bell crank lever 61 projected in its path, disengages the said awl from the said ratchet and relieves tiat resistance overcoming the friction between sprocket wheels 48 andv 51 and'the friction clutch connecting said wheels with the rollers i6 and 50 respectively, whereupon the chain drive 53 will feed the cloths F and H across their respective platens and rewind the soiled cloths upon the reel 1, the pawl 57 being again forced into engagement with the ratchet wheel 47 immediately upon its disengagementfrom the said .loed plate B. Thus the feeding of the cloths will occur, as in the ordinary engraving press, only after the wiping and polishing of the plates, thus preparing the said mechanisms for the wiping of the next plate.

The elasticity, or flexibility, of the platen due to the expansible tubes 19, 20, and 21' a greater extent than any other portion of the. i

will permit said platento adjust itself to any plate and eliminate any irregularities in the platen which might result in unequal wear upon the plate. These tubes supplement the springs 17 in securing the desired c'ure such flexibility of the platen as will sequent hand polishing by t permit it to adapt itself to any plate and at the same time permit the changing of the levelof the wiper cloth to increase or diminish the pressure exerted by the platen in its entirety or any portion thereof. The rounded under-surfaces of the members 19, 2t) and 21 permit the pitching of the wiper cloths in the manner above described, as by deflating the tubes 19 and 20 to a ditl'erent extent, a gradually downwardly pitched surface ii not only presented to the plate, but the pressure exerted upon the plate is gradually increased owing to the variance in the elasticity of tll(',.\'t1llllllt ot the air contained in the respective tubes. The parting strips 29 and 30 merely preserve the l'orm and relation of the said tubes.

'ith the circular movement of the wiper frame I), the tongue and slot connection -t-t intparts a direct lateral reciprocation to the polishing platen, the slot atl'ording that lost motion necessary to convert the circular movement to lineal movement in the manner above described. The rollers 423 permit the free movement of this wiper and hold it in engagement, with the requisite pressure, with the plate J. The sides of the brackets H and L2 as above stated, prevent any movement of the polishing platen in the samedirection as, and simultaneously with, the movement of the plate. The back Il-t being thus rigidly held, the elasticity of the polishing cloth is secured solely through the tube member 37,,the level of which may be regulated, on parallel planes only however, by the intlation or deflation of this tube.

\Vhile the curved surface of the member 37 tends to limit the area of contact between the polishing cloth it and plate J, the clasticity of this member permits it, under pressure, to flatten sntliciently to secure a contact area sutlicicnt to thoroughly remove any superficial ink left upon the plate by the wiping cloth F. Actual experience has demonstrated, that after a plate has left the polishing cloth, the upper surface thereof is entirely free from ink, and rctptires no subie pressman, thus permitting the press to be run continuously and avoid those interruptions Incidental to hand polishing of the plate.

The pressureexerted by 'the platen may be regulated by the air pressure witlnn the tubular member 37, so that, as with the wiping platen, the polishing platen may be readily and quickly adjusted to any plate J upon the plate bed B. t

The operation of the cloth feeding mechanism is apparent from the description of I this mechanism herein contained, and inasmuch as in its general features, this mecha nism is old and well known in the art, a detailed description of its mode of operation will not be entered into.

I have found that ordinary rubber coated canvas and flexible leather, are both suitable for the facings 3.1 and 40 although in some respects the leather is preferable as affording less resistance to the traverse of the cloths thereover, thus )osses sing greater durability. The roundet impact surfaces of the said facings 31 and 40 facilitate the engagement of the wiping and polishing cloths with the plate, and furthermore cause the gradual development of the requisite pressure between said wiping and polishing cloths and said plate. The dissimilarity in the movements of the wiping platen and the polishing platen is designedto prevent any possibility ol' the streaking of the plate ,or of an irregular fouling of the polishing cloth. The quantity of feeding movement of the cloths when used with a platen such as herein described, is small.-

While in actual practice I have found the detailed construction shown in the drawings and.hereiu described produces highly satisfactory results, it is not my intention to limit the invention to such details, it being apparent that such may be modified without departing from the spirit and scope of the invention. While I have shown a specitic t'orm ot cloth feeding mechanism, such form is amt-essential to the invention, it. being merely necessary that some suitable device be provided whereby the wiping and polishing cloths may be t'ed across andin engagement with the tat-lugs 31 andftO. In practice, I have used a spring projected back carrying the tlexible cxpansible members tor the wiping cloth. and I prefer to use llt'll, although the elliciency of the wiping cloth would not be materially impaired were the back l-t rigidly mounted upon the frame l).

I believe it to be broadly new to provide in a wiping or polishing mechanism for under-surtiu-e or engraving printing presses, an expansihle resilient platen member, and means atl'ording a medium for regulating the level of the impact; surface of the cloth passing over said member, 'and the pressure exerted by said cloth upon the plate, throughsaid expansible member, and I'in tend to claim such broadly.

Having described the invention, what I claim as new, and desire to have protected by Letters Patent, is i 1. In a printing press, a wiping and polishing mechanism embodying therein a. back, a plurality of expansible members carried by said back, individual means through the medium of which the operative plane of said expansible members may be severally and t independently adptsted, whereby said expansible members may be caused to exert a variable pressure upon the plates,

a plurality absorptive material passing over said expansible members and means imparting a feeding movement to said material.

2. In a printing press, a wiping and polishing mechanism embodying therein a back, a. plurality of parallel airtight inflatable "and expansible tubes carried by said, back,

individual valves through the. medium of which the operative plane of said tubes may be severally and independently adjusted, whereby said expansible members may be caused to exert a variable ressure upon the plates, absorptive material passing over said tubes and means imparting a feeding movement to said material.-

3; In a printing press, a wiping and polishing mechanism embodying therein a back, of parallel airtight inflatable and expansible tubes carried by said back, individual valves through the medium of which the operative plane of said tubes may be severally and independently adjusted, whereby said expansible members may be caused to exert a variable pressure upon the plates, a continuous facing drawn taut over said tubes, absorptive material passing over said facing and means imparting a feeding movement to said material.

4. In a printing press, a wiping and polishing mechanism embodying therein aback a plurality of parallel straight sections of air tight inflatable and ex'pansible tubes carried by said back, individual valves through the medium of which the operative plane of said tubes may be severally and independently adjusted, whereby said expansible members may be caused to exert a variable pressure upon the plates, a continuous fac-- ing drawn taut over said tubes, absorptive material passing over said facing and means impartinga feedingmovement tosaid material.

5. In a printing press, a wiping and polishing mechanism embodying therein a back,

a plurality of parallel straight sections of air tight inflatable and expansible tubes,

cleats clamping the ends of said tube sections upon said back, individual valves t-inuous facing through the medium of which the operative plane of said tubes may be adjusted, a condrawn taut over said tubes, absorptive material passing over said facing and means imparting a feeding movement to said material.

6. In a printing press, a wiping and pol-- ishing mechanism comp'rlsing the c0mbination with a wiping mechanism, consisting of aback, an air tightinflatable and expansible tube carried bysaid back, a valve through the medium of which the operative plane of said tube may be adjusted, zzbsorpthe material passing over said tube, and means imparting a feeding movement to said material, of a polishing mechanism embodying therein a platen comprising'a rigid back, an inflated expansible member carried by saidback, theends of said back extendin'gbeyond said member, bearings for said ends limiting saidplaten to a reciprocatory movement, means actuating said platen, absorptive material passing over said member bearings for said extended ends and means imparting a feeding movement to said material, and means imparting synchronous dissimilar movements to the operative members of said wiping and said polishing mechanism comprising means for imparting a rotary movement to said wiping mechanism, and connections between said wiping mechanism and said polishing mechanism whereby the rotary movement of said wiping mechanism is converted into a reciprocatory movement of said polishing mechanism. 7

7. In a printing press, a wiping and polishing mechanism comprisin tion with a wiping mechamsm, consisting of a back, an air tight inflatable and exthe combinapansible tube carried by said back, a valve through the medium of which the operative plane of said tube may be adjusted, absorp'- tive material passing over said tube, and means imparting a feeding movement to said material, of a polishing mechanism embodying therein a platen comprising a rigid back, an inflated expansible member carried by said. back, the ends of said back extending beyond said member, bearings for said ends limiting said platen to a reciprocatory movement, absorptive material passing over said member, means imparting a. circular movement ing mechanism and connections between said wiping mechanism and said polishing mechanism whereby the latter receives a reciprocatory movement from the former.

8. In a printing press, a Wipingand polishing mechanism embodying therein a frame, means supporting cloth reels, and a rewinding reel on said frame, a platen movable there=- mounted in said frame and with, pomprising a back, a plurality of paralle air tight,

to the back of said wip-' inflatable tubes carriedby said back, individual va ves through the medium of which the operative plane 'of said tubes may be adjusted, a continuous facing drawn taut over said tubes and attached to said back, means feeding theabsorptive wiping material from its reel about suitable guides in said frame, under and in engagement with said facing, and upon said rewinding reel, bearings fixedly mounted on the frame of the machine a jacent to and beyond said frame, a olisher back mounted in said bearings and adapt ed to have reciprocation therein transversely of the direction of movement of a plate, an inflated tube carried .by said back, a rein:

by said frame is given a and means whereby said polisher back is synchronously'given a reciprocating movement.

9 In a printing press, a wiping and p0lislnng mechanism embodying therein a frame, means supportim cloth reels, and a rewinding' reel on said frame, a platen mounted in said frame and movable there with, comprising a. back, a plurality of paliallel air tight, inflatable tubes carried by said back, individual valves through the medium ofwhieh the operative plane of said tubes may be adpisted, a continuous faclng drawn taut over said tubes and attached to said back, means feeding the absorptive wiping material from its reel about suitable guides in said frame, under and in engagement with said facing, and upon said rewinding reel, bearings fixedly mounted on the frame of the machine adjacent to and beyond said frame, a polisher back mounted in said bearings and adapted to have reciprocation therein transversely of the direction of movement of a plate, an inflated tube carried by said back, a reinforcing facing upon .said tube, a tongue and slot connection between said frame and said polisher back whereby said frame is given a circular movement, and n ans whereby said polisher back is synchronously given a reciprocating movement.

In witness whereof, I have hereunto atlixed my signature this 13th day of October, 1909, in the presence of two witnesses.

Witnesses P. V. WnxINo, P. FRANK SOXNEK.

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