US 1554597: "S. G. ROWLES OFF5ET PRINTING PRBSS. (OCR)"



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Patent Title: S. G. ROWLES OFF5ET PRINTING PRBSS. (OCR)
Patent Number: 1554597 Filing Date: Jul 11, 1923
Application Number: Issue Date: Sep 22, 1925
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Description

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Sept. 22, 1925. 1,554,597 S. G. ROWLES OFF5ET PRINTING PRBSS. Filed July 11, 1923 -i9 lei lei '00 (O 151,91y@-- K le 0


Patented Sept. 22, 1926* .UNITED STATES PATENT OFFICE. SIDNEY GEORGE. BOWLES, OF ORPINGTON, ENGLAND, ASSIGNOR OF ONE-ITA TO PERCY R013ERT KENDERI OF LONDON, ENGLAND. OFFEET PRIENTING PRESS. Application:aled July 11, 1,923. Serial No., 050,918. To all whom it may omeem: Be it known that I, SiDNFy GEORGE RowLEs, a subject of the King of Great Britain and,lreland, and a resident of Or- r) pington, county; of Kent, EnLyland, have invented a certain. new and u@eful Improvement i Offset Printing Presses, of which the following is a specification. This invention relates to rotary, olf-set io printing presses cqnstructed to print simultaneougly on both sides of @a webl sheet, or the like in one or more colours. In machines to eftect the forejoing, two contacting resiliently surfaced r, I ers are'so isp 15 d sed as to l@eceive a web of paper there- 0 betwei@,n, each being the complementary impression'cyl'mder of the other,, and each bemg ail off-set cylinder. Such o:ff-set cylinders each receive superimposed multi-eolour 20 imprints from separately inked printing roll@ having meial, stone, or similar surfaces. Other n . propo@als for multi-colour . pri ting from one 6ff-set cylinder embody the use of -a- plurality of stereotypes, lithographic 25 stones or the like separately inked ond im@ printing on the off-set cyliiader, som6times with the intervention of a second off-set cylinder in a double off-set press. The common pr@ctice of'off-set printmg i. e. by conveying pla'no-ara-phic im , prints to the off-set cylinders, presents no great difficulty as regards "making ready" or packing up but in adapting relief, stereo, letterpress and like work for off-set, the eiieeptional 3r) difficulties experienced generally_preclude a practical success. The rotary 6ff-set press, according to the present invention, adopts as one essential, the use, of rubber or other resilient or flexible steireos preferably con- 40 tacting directly -with the off-set cylinder; these, owing to their flexibility 1, can easily be made ready on the stereo rohers, and the yielding contact between stereos aiid off- set @ylilidet renders the multi-colour overprint- 45 ling on the off-set cylindi3r for steri@o work pra.etical and successful. Fu:rther, the 6:ffset cylinders are comparatively unaffected by stereo pressure, and consequently good stereo-work and similar results are obtain- 50 able when two off-set cylinders co-act for simultaneous back and front printing as previ.ously desetibed. The -said invention therefore consists of an o,ff-s6t cylinder co-acting *ith a second off-set cylinder, -and more than one stereo roller carrying resilient stereos forming im- pressions on eiach off-set cylinder, each stereo roller being independently inked, the two off-set cylinder@ each being the complemen- tary ijnpressic)n cylinder of the other. Fur- 60 ther, as will be'seen from the following de- scription and claims, novel adjustment means for various of the rollers is provided. In order that the said invention may be readily understood, reference is directed to 05 the following description and accompa@aying drawing which, shows in side elevation a printing machine capable of carrying out the invention. Referriiag to the drawin'gs there is illus- 70 trated a constiruction of plant whieh lends itself very 6onveniently to embodiment with a bag-miiking machine to be driven iia con- juncti therewith, the wliole operatin o n g as a single iinit for making paper or like bags 75 from a contin)aous web, arld printi@g'on one or both sides of the made-up bag, in any requisite number of colours. The base, irarhew ork 1 may be either separate, as shown (sucli, for instance, when the 50 machine i@ construct.ed as an independent plant for general off-set printing), or, such framewo rk 1 may be a continuation of.the frame of a bag-making or other machine working in unison as aforesaid. ]In the bed 85 2, the whole upper structu[re 3, which carries the various rollers, inkini devices, adjust- ments, and so forth, is slidably mounted so as to be capable-of transverse. travel across the bed to bring it into alignment with the 90 web, sheets, or articles, being fed between the printing rollers. s transverse a - justment may be e:ffected in any suitable manner, and the numeral 4 indicates the actuatin hand-wheel relating thereto. 95 Mountef across the u@per structure 3 are the two off-set cylind@rs 5 and 6 whi.ch each become s the complementary impressiork cyl- inder of the other when printing on both sides'is taking place. Alternatively, the top 100 of the sheet only 6an be printed, in which case 5 is merely an impression cylinder and 6 the o:ff-set, or the bottom only can be printe d, when 5 becomes the off-'set and 6 the impression c@linder. 105 In ihe construction shown, cylinder 5 is mado the fixed drivmg cylinder; the' end spi.ndl es take a'lvaiing throug4 the side siots 7 of the frame 3, and when. once posi- tioiled and adjusted, it remains perma- 110


la i 5b4,561 nentl Power is communica d througli y @e the chain wheel'or pulley 8 indicated by dot-and-dash line, or by other means. The roller 6 is mounted adjustably above said fixed rollei- 5, qnd takes a bearing in a bl6ek 9 Islidably arranged in the slot 10. The block 9 is normally spring- pressed upwardly by the side springs 11, but is held down, keeping the roller 6 under.desired contact 10 pressure, in the manner as hereinafter described. An upper@ block 12'. also slidabld in the slot 10, carries an adjustment shaft 13@ which is supported by resting on the saudle 14 cut in the head of a pin 15. The 15 latier, by its lower extreuaity, rests in a recess in the upper face of the blbck 9. The block'12 cAn be foreeddowia by the screw 16 which lowers the shaft 13 and pin 16, and consequently forces down theo roller 6 20 agaiiist spring action. After the main. adjustment through the screw 16, a fine or ruianing adjustment to separate the rollers 5 and'6 caia be effected in t-he following way. For.& short portion of its length the shaft 25 13 @is formed with a slight. cam eriphery at the poiiat where it is seated on t@p, saddle 14. Thus, by partiary rotating the.shaft the eccentric oi@.cam part can be brought on to the saddle and block 12 being held 30 against upward movemeiat by the screw 16,. the pin 15 completes the fiiaal downwaxd movement of roller 6, similarly the two rollers 5 and 6 ean be separated by a partial rotation of shaft 13, without recourse 36 to the adjustment krew 16. A handle 17, is employed to carry ouf the foregoing adjustmeint. It is to be understood that the blocks 9 and 12, the pin 16, spring 11, the eccentric patt of the shaft 13, and screw 16, 40 ar-e,duplicated on the far side of the 'machiine, with or without a second handle i7. Associated with the o:ff-set rollers 5 and 6 are pai I rs of stereo rohers 1 1 8, 18, and 19, 19 - respectively, the spiiadles of which are 46 dropped into slots in the frame 3 as'shown. Each spindle runs in ecce@ntric flaiaged beariiags which are adjustable in such a manner that rotation of the flanges or plates 20 on their own @entres (determined by the trave .50 -of the arcuate slots 21 over the studs 22) gives,a slight movement of the spindles in their slots. By this means the stereo roup-rs 18".18, 19, 19, may be adjusted in relation to the off-set 'rollers 5 and 6. In order to 56@ move t]@e top roller 6 away from the coacting roller 5, t@here i's pro,vided a device ,whereby the stereo rollers 19, 19 may simul@., taneously and automatically be rdoved to obv-iate jamminlr of the said oft-set roller 6. do When the handle.17 is moved to bring the cam of shaft 13 uppe-rmo@t 6lear of the saddle 14 and thus cause the rise of the pin 15, block 9 and roller 5 uiader the action-of the S ' 11, the eecentric plates 20 of es the ro@rilenrsg, 191, 19 are also partly rotated. The means employed.consists of a rock!'ng plate 23,fixed on th@ shaft 13 and moving with the handle 17. This plite 23 carries'.,l pair of pi-voted links 24 which each extends - to its respective plate 20 where it is fixed 70 to a stud projeciing froin the plate 20. Sucli links 24 are capable of -extension and shortening by means of oppositely threaded screw componeiits or otherwise, thus en-' abling the contact p@essur6 of either @tereo 75 cylinder 19, 19 with the o:ff-set roller 6 to be adjusted independently. By means of the'handle 17 the top assembly of rollers 19, 19 and 6 dan be moved as one complete unit with relation to the roller 5. The fouj7 @80 elei-nent.s, indicated as a whole by the refer- ence numeral 25, represent any convenient and suitable inking gear,-.the, rollers 6f which gupply the stereos mounted on the stereo rollers 19, 19, and 18, 18. 85 It wlH bia observed that either oiae, two, three or four S'tereo rollers can be put into operation in an ap]paratus constructed ae- cording to the foreg6ing embodiinent with the result that top and bottom of the sheet go or the like siiigle or together can be printed in one or two coIGurs. In operation, assuming b6th sides to be printed in two colours, the rubber of like stereo is fixed to'the rollers 19, 19 and 18, 95 18, a-nd so adjusted that one i@oller 19 over- prints the second colour on to the off-set roller 6 which has received one imprinting from the other roll'er 19. Similarly, the stereos' on the rollers 18, 18, are adjusted loo to register exactly on the roller 5, and the combined top Printings from the off-set roller 6 on to t.h8 paper br the like a; I re causod - to register with o@ print in . any d@finite - relation to the 'bottom printings 105 from the lower - off-set roller. Although roller 5 is a printing roller, it s'erves fis the -impression rc . iller for 6, and vice versa. Cylinder 5 is the master or driver, and all the other rollers- and ipking iio apparatus are geared by pinions int6rior and,exterior of the frame 3 as indicated by the interengaging do-t-and-dash circles showia. I claim 1. In an off-set printing machiiie, a frame- work, an off-set cyliiader mounted in a fixed location in s-aid frame-work, a second off-set cylinder i-nounted above the first off-7set cyl- inder, and means for adj.usting said last 120 named off-set cylinder co yieldiiagly mprisi"g - ii-iount'ed journal block8 saddle-headed pins adapted to eiigage said @@locks, a shaft havin- an eccentric portion adapted to bear alainst the- saddle-headed pins, and a han- 2r) le carried by the shaft for'rotating the same whereb the pin is forced down or allowed to rise. 2. In an off-set printing machine, a framework, an off-set cylinder mounte,d in a fixed 130


1,654,597 location in said frame-work, a second off-set @ylinder mounted above the first off- set cylinder, and means for adjusting. said last named off-set cylinder, a'pair of stereo rollers mounted below the fixed o:ff-set cyliiider, and a pair of stereo rouers adjust,%bly n-iounted above the upper offset cylinder, and common means for simultaneously adjusting said iipper off-set . cylinder and said 10 tipper stereo rollers. 3. In an o:ff-set printinlr iiaachiiie, a fraiiae- work, an o:ff-set cylincrer mounted in a fixed location in said framework, a second off-set cylinder mountecl above the first ofr-@ 15 set cylinder, and means I for adjusting said last named off-set cylinder, a pair of stereo rollers mounted below the fixed off-set cylinder, and a pair of siereo rollers adjustably mounted above the upper offset cylinder, 20 and common means for simultaneously adjusting said upper o:ff-set cylinder and said tipper-'ster6o rollers, said means comprising a shaft having an eccentric portion and a pin engagingr With the'adjustable mounti'ng 25 J!or the upper off_set roller, eccentric flanged bushings havidg the upper stereo rollers mounted therein and also having -slots'in the flaiiges thereof, 8tuds on the framework of the machine and working in said slots, so a rocking plate mounted on the shaft and having an opeirating handle, and links connecting said rocking plate with the flahged bulshings for mounting the upper set of stereo rolle'rs. , 4. An off-set rinting maohine, compris- 35 in g a frameworl@l, an o p er- m anently adjusted in s a sec- o nd off-set cylinder adj to th e first, each being the compleme p ression cylinder of the other, a lit y 4 0 of stereo rollers to each of tlle o:ff d ers, said stereo rollei-s bein s m ounted in the framework to be a p a djustment relatively to their o s et cylin- ders and an inking apparatus for each stereo 45 roller, the adjustment means for the adjustable o:ff-set cylinder consisting in j'ouriialling its spindles each in a bloclk slidably disposed in a slot in thi6 framework, said bl ock . be,ng-@ normally p 5 0 a spring, an adjustment o ver th e cylinder and@parall S haft b eing rotatably eirried ai r of bl ocks also slidable in th e first-mentioned blocks, a pin with a saddle 55 head to support the second blocks upon the first blocks and a pair of threaded studs e2ctending tlirough the frame to press down or reiea,,z;e both pairs of blocks, substantially as herein described. 60 In testimony whereof I,have affixed, my signature hereto this 29th day of June, 1923, SIDNEY GEORGE ROWLES.

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