US1107772A - Printing-press. - Google Patents

Description

G. R. FOGWELL.

PRINTING PRESS.

APPLICATION FILED NOV.Z5,1910. RENEWED DEO.22,1013.

Patented Aug. 18, 1914.

MM/ m Qwueutoz UNITED STATES PATENT o FicE- CHARLES R. FOG-WELL, OF PHILADELPHIA, PENNSYLVANIA,'ASSIGNOR T0 MARY I). TAYLOR, OF PHILADELPHIA, PENNSYLVANIA.

PRINTING-PRES&

pplication filed November 25. 1910, Serial No. 594,057.

Specification of Letters Pfltgntiatcntcd Aug. 18, i914.

Renewed December 22, 1913. Serial No. 808,273.

- To all whomit may concern Be it known that I, CHARLES Ronnn'r FoowELL, a subject of the King of England, and aresident of the city and county of Phila delphia, State of Pennsylvania, have invented an Improvement in Printing-Presses, of which the following is a specification.

My invention has'reference toprinting, presses and consists of certain improvementswhich are fully set forth in the following specification and shown in the accompauying drawings whichforin a part thereof.

The object of my invention is to provide a construction of press suitable for plate printing as in photogmvnre work in which a more perfect printing results by reason of a more satisfactory application of the ink to the engraved plate and the wiping or cleansing of the surface of the same at one and the same operation and by the same means. By my improvements the most perfect printing possible is attained and at the same time the operation of printing may be conducted at a very high speed.

lily invention consists-in means for sup plying ink ,to tho engraved surface of lilo plate combined with means for pressing the ink into the depressions or ciwra ed portions of the plate alone and pressure squeezing back all ink from the uncng'raved surfaces of the plate.

Miore specifically my invention consists of an engraved surface combined with means for supplying ink in bulk to the surface. of the engraved surface, and a hard metal rofijatablc roller making a close contact across the surface of the plate for simultain-ously pressing the ink into the recesses or engraved portions of the plate and forcing back all ink from the uncngravcd surfa es, said plate being preferably in cylindrical form and moved in close contact. with the ro tatable roller.

My invention also comprehcmls the method of printing from etched or engraved plates which consists in applying the ink to the etched or engraved surface of the plate and simultaneously impressing the in: into the recesses or engraved parts of the plate and squeezing back all ink from the unetched oifunengravcd portions of the plate by the rolling contact with the plate of a hard roller while maintained in Contact with the plate across its face under great and con st-ant. pressure, whereby the plate is perfectly clear of ink except in the recesses or engraved portions thereof.

My invention further includes details of construction which, together with the features above set out, will be better unden stood by reference to the drawings, in which Figure 1 is a side elevation of a plate printing press embodying my invention: Fig. 2 is a plan view of the same; Fig. 3- is a. sectional view on a larger scale taltrn on line f Fig. Fig {is an elevation of 'the gap filling plate for the printing plate cylinder; l ig. 5 is a plan view of one of the clamping plates for holding the engraved plate upon the plate cylinder; and Fig. 6 is a cross section of the ink regulating in =ans.

2 is the main frame and has at its upper end two slotted portions 7 and 2G in sub stantial alinenicnt.

3 the type form or plate cylinder and journalcd in fixed bearings 4 between the two slotted guide portions.

3 is the impression roller and is prcfcn ably formed of metal covered with rubber and. is journalcd in bearings (i which are- ;guidcii in the guide portions 7. These bearings ii are held in position between springs 8 and 5'), the latter being adjustable as to ten sion by means of screws 10, which may be turncd by the lnitcl' gears l1, transverse shaft l3 and band whccl ll). By this hicans. the amount of tension for the impression may be regulated, and at all times, the impression roller is so supported that it may be forcibly moved away from the plate cylinder when necessary, as hereinafter stated.

The roll of paper to be printed indi rated at 14 and is supported upon a mandrel which inturn is sustained by suitable bcarlugs 16 on the main frame. The web of paper passes from the roll alternately around a series of tension rollers 17, thence passes between the plate cylinder and impression roller, thence between feeding rollers 18, and after leaving' the feed rollers, the said web may be sever ed into sheets by cutting cylinders 19. The said feeding and cutting cylinders may be of any suitable constrnction.

24 is a pressure and cleaning roller of small diameter and is carried at each end in bearings 25 which are guided n the the guide way 26. This roller 2t rests against the surface of the. engraved plate 37 which is secured about. the. periphery ol' the. plate roller 3. The. ink-well '20 extends entirely 5 across the machine being supported at ach cud on the main frame as indicated in Fig.

l, and this ink-well is provided with a transverse opening or slot along its lower edge so to allow the. ink to flow by grjrznity down upon the roller 24. The opening foru'iod by the slot is regulated by the adjustable gate '31 so that the sheet of ink (lowing down upon the roller 2- and to the engraved plate may be in greater cr less quantity to suit the particular rcquirenui-nts ot' the. engraving of the plate. It is seen that no disturbing rollers are necessary in the structure oi this applieatii'm. The pun pose of the roller 24 is two-fold, i'iamely. to press the ink which is delivered upon it from the ink-well 24?. into the depressionin the surface of the engraved plate and at the same time to positively and ellcctiwlv squeeze otl' from the unmigravcd surfaces all of the ink. so that the plate is perfectly clean ot ink except. at. the recessed portions which correspond to the etched or cngg ravc l parts into which the ink is pressed and from which it is to be delivered upon the. pap r web. This roller l'lis preferably of small diameter and should be of exceedingly hard. smooth matca'ial. preferably chrome steel aml provided with a surl'acehaving equivalent. to a. mirror finish. as such a condition is necessary to secure the proper cleaning of the surface of the etched or engraved plate. v Thc roller 24 is provided with collars 36 which run in contact with the. ends of the. plateQroller 2 and also with a pres sure roller 27 limiting against the outer side of. the cleaning roller 24; so as to form in etioct a pocket between itself and the. etched platc into which the ink from the. ink-well may be received. The supply of ink is regi (I latod' to suit the consumption in the priming operation.

The pressure roller 27 is of large diameter compared to the cleaning roller 24 and is carried in bearings 28 guided in the. guide way 26, and its object is to hold the clean-- ing roller firmly up against the surface of the etched or engraved plate. It; is made of considerable diameter so that it will not spring under the application of pressure to 55 its journals and the resistance by its conr tact with the cleaning roller. This pressure roller may be adjusted to the desired degree of pressure upon the cleaning roller 24 by means of the screws 29, the miter gears 30. 60 the. transverse shaft 31, and hand wheel 32.

Any other means maybe employed for applying the desiredpressure. It is important that the cleaning roller 24 shall be of small diameter compared to the diameter of the 65 plate roller, because the smallest possible line of contact [5 advantageous in securing a proper cleansing of the'surl'ace. of the plate withoutwithdrawing the. ink from the recesses or engraved portions thereof. A roller ol' large diameter would not clean properly because of the extent of surface contact between it. and the plate and which would produce an objectionable suction during the rolling operation. It is because the roller 2t should be of small diameter thatit becomes necessary to employ a pressure device of some kind to hold it up to the cngrzn ed plate with the proper degree of pressure. The pressure roller 27 is the prel'crred Form oi" applying pressure to the cleaning roller 24. but it is evident that any other equivalent device may be employed in lieu thereof.

l prefer t gear the. plate cylinder. the impression roller and the cleaning r ller together by suitable gears 33. 34 and 35 respectively secured to theshafts of these rollers. Such gearing is shown on one end only. but may be applied to both ends. it' so desired. It is not. necessary to apply any gears to the pressure roller 27.

it will be understood that while it is desirablc that the roller 2-4 shall be positively rotated. this result does not necessarily require that it shall be geareddirectly as shown. I have. shown the manner of ro tating it in the simplest form of my invention. but it is evident that. the said roller may be trietionally rotated if so desired.

While the engraved plate may be secured to the. surface of the plate cylinder in any suitable manner, such as by forming it as a tube and slil'iping it in place upon the cylinder. I prefer to employ etched copper plates which are stretched about the pcriphery ol the plate cylinder: and the means or securing: such plates in stret hed conlition which I prefer are herein-shown.-

Thcy consist of a plate 37 of approximat.cl N0. 24 gage. the ends of which are preferably beaded or wired, ,as at 38. These beaded ends are clamped between two plates 39 and 40, which are secured together by screws 41. These. plates are then pulled down with the. ends of the copper sheet into a recess 4-4. across the periphery oi" the plate cylinder 3, by means of screws 42. thereby drawing the. copper sheet or plate 37 over the, edges-43 of the roller and put ting it under the desired tension. The gap formed by the recess t-l may be closed by a plate. 45 having feet 46 which are secured to the. roller by screws 47. The outer surface of the plate 45 is preferably curved to correspond to theeurvature ot' the engraved plate 37. Any other means of attael'iing the engraved plate and gap closing plate may be. employed, if so desired.

If desired. the impression roller 3 may be moved out'of contact with the plate roller during the passage of the gap filling plate 45 under it, and this is secured by providing the impression roller with collars 49 at each end and providing the plate cylinder with small cam portions 48 which are arranged in radial alinement with the said gap filling plate 45 and which thereby move the impression roller against its springs 9 and away from the plate cylinder during the passage of the said part 45.

In this application I make no claim to the specific means for stretching the engraved or etched plate about the cylindrical surface of the printing cylinder as that will form subject matter of a separate application.

\Vhile I have described my invention in the form in which I prefer to employ it, I do not restrict myself to the details as they, may be modified in various ways without departing from the spirit of the invention.

Having now described my invention what I claim as new and desire to secure by Letters Patent is 1.111 a plate printing press, the combinw tion of the plate cylinder having thereon an eng-aved or etched plate, means for rotating. the plate cylinder. with means for applying ink to the surface of the said engraved or etched plate. a roller of small diameter and highly polished surface and of exceedingly hard material rolling in close contact with the surface of the engraved or etched plate at a point in rear of the application of the ink thereto and constituting the sole means required for removing-the ink from the unengraved portions of the plate,aud means for positively rotating the said roller of small diameter at the same surface speed as the etched plate on the plate cylinder, whereby said roller performs a dual function of pressing the ink into the engraved or etched portions and removing the ink from the smooth or unengraved or unetched portions.

2. In a plate printing press, the comb-ination of a rotating plate cylinder having thereon an engraved or etched plate, with means for applying ink to the surface of the said engraved or etched plate, a roller of small diameter and highly polished surface and of exceedingly hard material, roll-. ing in close contact with the surface of the engraved or etched plate at a point in rear of the applicationwf the ink thereto and constituting the sole means required for re moving the ink from the unengraved portions of the plate, and means for positively rotating the said roller of small diameter at the same surface speed as the etched plate on the plate cylinder. whereby said roller performs a dual function of pressing the ink into the engraved or etched portions and removing the ink from the smooth or unengraved or unetched portions, and means for varying the pressure applied to the said cleaning roller.

3. In a plate printing press, the combina: tion of a plate cylinder having thereon an engraved or etched plate with an impression roller for printing from the plate, means for delivering ink to the plate on the plate eylinder,-a pressing and cleaning roller of relatively small diameter compared to the diameter of the plate roller and formed of exceedingly hard material with a smooth surface for simultaneously pressing the ink into the recessed or engraved portions of the plate and also for removing the ink from the unengraved portions of the plate, and a supporting roller of relatively large diameter as compared to the pressing and cleaning roller for forcing the said roller toward the plate cylinder and in close contact with the plate thereon.

l. In a plate printing press, the combination of a plate cylinder having thereon an engraved or etched plate. with an impression roller for printing from the plate, means for delivering ink to the plate on the plate cylinder, a pressing and cleaning roller of relatively small diameter compared to the diameter of the plate roller and formed of exceedingly hard material with a smooth surface for pressing the ink into the recessed or engraved portions of the plate and also for removing the ink from the nnengravcd portions of the plate, a supporting roller of relatively large diameter as compared to the pressing and cleaning roller for forcing the pressing and cleaning roller toward the plate cylinder and in close contact with the plate thereon, and positive means for rotating the pressing roller and plate roller in opposite directions, and means to adjust the supporting roller to regulate the pressure of the pressing roller upon the plate on the plate cylinder.

In a plate printing press, the combination of a plate cylinder having thereon an engraved cr-etohedflplate, with an impression roller for printing from the plate, means for delivering to the plate roller, a pressing and cleaning roller of relatively small diameter compared to the diameter of the plate roller and formed of exceedingly hard material witha moth surface for pressing the ink into-the recessed or engraved portions of the plate and also for removing the ink from the unengraved portions of the plate, a supporting roller of ret atively large diameter as compared to the pnessing and cleaning roller for -"forcing the pressing and cleaning roller toward the plate cylinder and in close centactwith the plate thereon, positive means for rotating the pressing and cleaning roller and plate cylirr der in opposite directions, and means to id just the supporting roller to regulate the pressini'e of the presaing and cleaning roller upon the plate on the plate cylinder, and gears l)('l.\\'l,"tll the pre--sinfg and cleaning roller and the plate eylinder to an e the former in rotate at nl slantially the 5211110 snrtaee .wpeeil asthe latter.

t3. In a printing press, the Hmihination o a plate t'ylinder. a pressing and (leaning roller for pressing the ink into the etehed or engraved portion of the plate and removing the ink from the nnenfiraved portions thereof. and a supporting roller of relatively large diameter eompa red t the pressing and eleanifng roller for suppnrting the pressing and (leaning roller and lUl't'iItLI it into conta twith the plate of the plate cylinder,

the axes of the ylinder and rollers heing ar tinged in the blllllt plane.

7. it a plate rinting pres- 1. a plate eyliir der eonsietin e' ot a rvlinder having a l ngitudinal reees :lli't its tare. eom ined with the etched or en; n- 1rd plate ;ll'i';tl'l;{ttl ahont the eirenmlerenee ol' the evlinder and having its opposite ends extended into the reeess, means tilting into the i't't'ess for providing a hridgge over the reeesx an inking roller, an iinpresdtm reller perating in eontaet with the plate ol' the plate e -linder and means for antomatieally moving: the inipresxion roller out o! eonttnt with the plate eylinder and its plate, during the int iwal that the reet 1d portion of the plate r gliie der andjh bridging means pa impression roller.

8. In a plate printing p: as. a plate evl a (101' having 2-. longitudinal re -es;v at l' i ii fat-e, combined with the etehed or et;;'rn\t"l plate arranged aliont the eirenmterenee o" the roller and having itr; opporitr wi h; extended into the reee; a pre .--in; and eleaning' roller for prea ine ink inn; the. engraved portion of the plate and l'-;tl':\'ili the ink from the nnenuraned portions: thereof. a. bridging plate ranged within the recess of the plate roller and ha\.i its outer 2'. surface rnrved to the rnrvatnre ol the plate which is arranged ahont the plate evlinder and arranged aaa tftllltihllfttitltt ot the ear ature of the plat ll 'l' fifi the reeeas ol' the evi- -inder for supporting; the presaing: and cleaning! roller (llll'llltf the rotation of the plate cylinder.

9. In a plate printing press, the. t'oinhination of a plate evlinder having thereon an engraved plate. illtfttllr: for delivering ink for application to the engraved lines of the plate, and nn tary means for simnltaneensljv pressing! thev ink inth the engraved parts of the plate and pressing hat-k all ink from the nnengraved portions thereof on the ame transverse line arross the engraved plate at any mom nt to eon'i pletelv remove all snrplus ink and pat the. inked plate in condition for immediate printing.

it). In a plate printing press. the ei'nhination of a plate eylindeil aving; thereen an engraved plate, in ans for delivering ink for applieation t the engraved lines of the plate. and unitary means tor simultaneously pleasing the ink into the engraved parts, of the plate and pressing haek all ink from the nnengraved portions thereof on the same tranaverhe line aero the engfaved plat at an moment to eompletely remove, all ear plus ink and put the inked plate in condition for immediate printing, said means consisting' (it a hard snrl'aee moving in eontaet with the plat and traveling therewith eon tinnally in the same direction.

ll. In a plate printing press. the eotnhina tion of a plate cylinder having thereon an engraved plate, in an 'lor delivering: ink for :ipplieation to the engraved linen' ol' th plate. and unitary n'ieam for simultaneously i). t$' l!lf the ink into the engraved parts of tie paz' and preasing hark all ink from the nnenszraved portions thereot on the same l'i'tli: verse line il l'tlfil'i the engraved plate at any mrnzent to eompletetv rem ne all tilll' plm ink and put the inked plate in enndition for immediate printing. said means emist inn; aolt-lv of a smooth metallie moving snfare eonilinnoin'lv traveling in the same di re -thin in eontae-t with the engraved plate. and twain; aeting on the end and inlet-inelitt e pin'tinw; i'or pl'tfislllfl said moving; snrinto elose eontaet with the moving en 51' l plate.

l... in a plate printing prefix, tl'irom inm iinn of a plate. erlinder law in thens za's nl plate. a hard .--niooth m tal roller l5! ilainf a eontaet. with the plate and arl nfi' I the .lit-ItllF- l or preislngf the ink into the n gr; '1(i p'ttioin' ol' the plate and an i illtJliH lnr rem iin all oi the ink l'r nn lle :n'aved portiona ol the plal and at i-ik z-i pplying tll 'illh lor :nipl :in; ink lth rull-i". aid pla v\nhstan l 'l' ;-1 the plate vvher ev the ink is appiie'd to the en- ,Q'raved l'ti(!l|: n" the plate.

12). in a plate printin; e f prew, the eoinhinw tion of a plate evlinzler liavin; th engraved plate. a hard :anooth metal roller making a rolling eontaet \\ith the plate and aeting at; the m ans for ]ll't ll\'lll,' ,1' the ink into the r.- ;raved portion v ol the. plate and in: the. sole mean tor removing all of the. ink from Lllt' nnengtraved portions oi the. plate. in tilts act.- ing won: the. length of the roller to l'oreihly press it against the engraved plate, an ink supplying lllftlltH for supplying 'nk under th tion of gravity to the rolleeand plate anhstantially aero.--.- the plate whereby the ink isapplied t0 the engraved pertionset the ate, and a gate for regulating tin quantity of ink delivered.

ll. The herein tlttsel'illtitl method wt print. ing: from intae'lio plates which eonaisti in Elmllltl -applyin the ink to the surface of the ininked and cleaned ready for printing.

15. The herein described method of printing from intaglio plates, which consists in applying ink to the plate and simultaneously impressmg the ink into the engraved portionsof the plate and squeezing back all ink from the smooth or unengraved portions of the plate by means of a polished hard metal traveling surface presed in close contact with the intaglio plate and being the sole means for the purpose.

16. The herein described method of print ing from intaglio/plates, which consists in applying ink by graiity to the plate throughout the width of its engraved portion and simultaneously impressing the ink into the engraved portions of the plate and squeezing back all ink from the smooth or unengraved portions of the plate by means ofa polished hard metal traveling surface pressed in close contact with the intaglio plate and being the sole means for the purpose.

In testimony of which invention, I hereunto set my hand.

CHAS. R. F OGVVELL.

Witnesses;

R. M. HUNTER, R. IM. KELLY.

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