US257581A - Perfecting printing-press - Google Patents

Description

, (No Model.) 7 sheets-sheet 1.

J. T. HAWK-ms."

PERFEGTING PRINTING PRESS. H

' No. 257,581. Patented May 9,1882.

u. PETERS. Phclc hihognpher. Wishingtnru :1v 1;

(NqModeL) 7 Sheets-Sheet 2.

J. T. HAWKINS. P BRPEGTIN G PRINTING PRESS-- No, 257,581. Patented May 9,1882.

N. PETERS. PhulmLilhagr-nplvnr, Walhingtun. D. c.

(No Model '1 Sheet's- -Sheet 3.

J. T. HAWKINS]- PERFEGTING PRINTING PRESS; 1 No; 257,881. Patented Ma s, 1882.

.G'i Y (N0 Model.) .7Sheets-Sheet 5.

J. T. HAWKINS. PERFEG'TING' PRINTING'PRESS. No; 257,581, Patented May 9,1882.

VWT/VEJSES j/VVI/VTOR:

N. PETERS. PMIn-Lllhograpiwr, Washington. D c.

(No Model.) 7 Sheets-Sheet 7.

J. T. HAWKINS. PERFEGTING PRINTING PRESS. No. 257,581. Patented May 9,1882.

N. PEIERS. Plwwiiihugnphar, Walhingtou. D.C.

' UNITED STATES PATENT OFFicE.

JOHN T. HAWKINS, OF TAUNTON, MASSACHUSETTS.

PERFECTING PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 257,581, dated May 9', 1882.

Application filed April 18, 1881. (No model.)

' ro-rapid and correct means of printing newspapers and other work from flat forms, and to print both sides of the sheet at one operation,

either from acontinuous web or roll of paper or fromseparate sheets, as may be desired.

The invention consists broadly in constructing a press having two impression-cylinders, one in advance of the other, and a single typebed carrying two forms, andwherein the first cylinder receives each sheet at its top and de- 20 livers it from its top, head first, to the bottom of the second cylinder, which there receives the sheet and delivers it from its top tail first,

the various adjuncts and details forming parts :of the invention being particularly hereinafter 25 described and specifically set forth in the (claims.

The invention as illustrated in the several figures of the accompanying drawings will now be described as follows Figure 1 is a side elevation, Fig. 2 is a rear elevation, and Fig. 3 is a plan, of the machine as designed to be fed with separate sheets from an ordinary feed-board and to print and deliver the same fiat upon an ordinary fly- 5 board. Fig. 4 shows in twoviews the impression-cylinder which prints the last side of the sheet, and Fig. 5 the impression cylinder which prints the first side, both cylinders en- .larged, and exhibiting details of construction 0 omitted in Figs. 1, 2, 3,-10, and ll for the sake of clearness of illustration. Fig. 6 illus-' trates in two views the grippers belongingto the first cylinder, and Fig. 7 illustrates, also in two views, the sheet-lifterfi ngers belong- 5 ing to the same cylinder. Fig. 8 illustrates the distortion of the gripper-edge of the sheet caused by the old methodofclampin g the sheet upon the tyinpan over and between the sheet lifter fingers by spacing the grippers between. 0 the sheet-lifter fingers. Fig. 9 shows the smooth andundisturbed condition of the said gripper-edge of the sheet when held upon the sheet-lifter fingers by the grippers, as provided for in this invention. Fig. 10 is a side elevation, and Fig. 11 a plan, of the machine as designed to print from a continuous web or roll of paper and to deliver the printed matter in separate sheets to a folding-machine which may be attached thereto. Fig. 12 illustrates in two detached views (one in section) the apparatus for separating the web of paper into sheets as it is fed from the roll and delivered to the grippers of the first-impression cylinder, which apparatus is shown attached in position in the preceding Figures, 10 and 11. Fig. 13 illustrates certain details of the folding apparatus, hereinafter described. In these several figures of the drawings all that relates to the opening and closing of the grippers, the feedguides, and the inking apparatuaexcept the arrangement and positions of the form-rollers,

is omitted as not essential to the invention,

several of the well-known plans of each of these end to end in the direction of the length of the press, and theimpression'cylinders B and B being so placed as to give the bed B the least traverse or stroke consistent with the proper inking of the form and the delivery of the sheets. It indicates the inking-rollers for the first-side, and R the inking-rollers for the second-side, impression, the ink-fountains and other parts of the inking apparatus being omitted.

0 indicates the feed-board, and G the flyboard, for that form of the press to which separate sheetsare fed by hand.

The crank G is secured to the shaft G, and is driven by a gear-wheel, G also secured to the shaft G. Said geanwlieel G is itself driven'by a pinion, G, secured to a shaft, G;

journaled in suitable bearings in the frames A and carrying the two fly-wheel pulleys G To the crank G is attached the crank-pin c, to which one end of the connecting-rod c is jointed, the other end of said rod being jointed to the rolling pinion 1?.

The stationary rack E is secured to the bedpiece or roller-ways of the press, and a corresponding rack, E, is secured to the under side of the bed B between which racks and engaging both said rolling pinion P revolves and travels.

Upon the shafts s s, which, with the shaft P, are journaled in the carriage or roller-frame K, is a series of rollers, E Said rollers run in the roller-ways R and support the bed B by correspondingroller-ways, Rfliii the under side of the bed B The object of the last-described arrangement is to give to the bed B twice the rectilinear motion imparted by the crank G to the carriage K, and thus to avoid the use of too long a crank, while still imparting to the reciprocating parts the easy reversal at the ends of the stroke peculiar to thecrank motion.

The two impression-cylinders B and B are geared directly to and are driven directly by the bed B by means ofa rack, R, secured to the upper side of the bed B and correspondin g gear-wheels, B It, secured to the cylinders B and B, which engage the rack R", the cylinders B and B, rotating in either direction as actuated by the bed B The impression-cylinders B and B areso proportioned that they each make a greater rotation than one complete revolution in each direction for the purpose of obtaining a minimum diameter of cylinder-in the case of the cylinder Bto carry the head of the sheet after its first complete revolution far enough down the inclined bridge-fingers f to reach the grippers of the second cylinder, B, and in the case of the cylinder B to carry the tail of the sheet m sufiiciently high above the form to allow of its being passed to and delivered upon the fly-fingers f at the commencement of the cylinders retrograde or non-printing rotation, as hereinafter more fully explained.

The shaft D runs parallel with the side frame, A, at the right hand in Fig. 2, in suitable bearings attached to the said frame, and is driven from the shaft G by a pair of miterwheels,Dand D On the shaft D are secured two cams,D and D and the slidingbarsD and D are held in their places by two collars, Darmd D, secured to the shaft D. The slidingbars D and D are slotted to embrace the shaft D, and carry in their upper ends the rollers D and D which engage the grooves in the cams D and D The sliding bars D and D carry also on their lower ends short racks, the backs of whichrun against the two friction or idler rollers D and D, which run upon studs secured to the framesAfor the purpose of keeping said racks in gear with two sector-gears, D and D secured to the eccentric rockshafts D and D The eccentric parts at each end of the rock-shafts D and D are,

j ournaled in the cylinder-journal side rods, D and D and the cylinders B and B are jour naled in the upper ends of the side rods, D and D The effect of the operation of the parts last described, from D to D is to both raise and lower the impression-cylinders B and B at the proper times, the form and position respectively given to the cams D and D upon the With the above-described positions and proportions of parts the inking-rollers It will run partly over the form T belonging to the cylinder B, and the rollers B partly over the form T belonging to the cylinder B; but in order thus to avoid the inking-rollers belonging to one form coming in contact with the other form while the latter runs partly under each set of said rollers, there are secured to the upper side of the bed B two sets of roller-bearers, B and B each pair of bearers being set out of line with the-others; and upon the ends of the inking-rollers It are secured the rollerwheels B slightlylarger in diameter than said rollers, and so placed upon them as to come in contact with and run only upon the bearers B of that part of the bed B which carries the v form T for printing the second side; and, conversely, there are similar roller-wheels, B on the rollers B, so placed as to run only on the bearers B on that part of the bed B which carries the form T for printing the first side. In this way each set of inking-rollers is caused to run from end to end ofits own form in contact therewith, but does not touch any partof the other form. Without this arrangement one pair of rollers would run partly upon and reverse upon the opposite form, which would interfere with the proper distribution of the IOC ink on the forms and fill up the fine lines in the form at the point of reversal. Two racks, E*, are secured to the under side of the bed B engaging which are the spur-wheels E running upon studs E secured to the frames A. Two long heavy weights, E, run upon grooved rollers E and a rib on the lower side of each weight runs in the respective grooves of each of said rollers, which ribs serve as guides for their respective weights. The grooved rollers E run upon the shafts s s, journaled in the frames A, and the roller-ways R Upon the upper sides of theweights E are secured racks E also engaging the wheels E. The weights E are cast with pockets E for the purpose of loading said weights as may be desired.

The office servedv by the parts described as s and E to E is to equilibrate the respective momenta of the reciprocating bed B, with its typeforms, the carriage or roller-frame K, with its rollers, and the efforts or momenta exerted by the rotary cylinders to propel the bed B all during the last half of either stroke of the bed,'and thus to avoid all tendency to impart vibrations to the machine as a whole through the inertia of the reciprocating parts when run at high speeds, the weights E having motion at all times in a direction contrary to that of the other main reciprocating parts.

It is designed to so load the pockets E" of the weights E for any weight of form used that their combined momenta or total momentum shall equal the total horizontal momentum of all the otherwise unbalanced, reciprocating parts moving in the opposite direction to said weights. y

The vertical 'and. horizontal momenta of the crank G and connecting-rod c are equilibrated by a counter-weight (not shown) placed in the wheel G and setin in opposition to the crank G.

Through the above described systems of equilibrating the several momenta of the moving parts the machine may be run at high speeds without vibration or tendency to move the machine as a whole.

The bridge or stripper fingers f strip the sheet ahead first from the cylinder B, when the F ,held into gearwith a sector-gear, F ,bythe idler-roller F running upon a stud in the frames A. The sliding bar F is held in place at its lower end by the collar F ,secured tothe shaft D. On the upper end of the sliding bar F are placed weights W, which may be varied at pleasure, but suificient to keep the roller F in the cam F when the sheetis on the fiy-fingers f. varied for different sizes of sheets or speeds of press and the consequent variation in the resistance offered by the air to the passage of the sheet" through it. The fly-fingers f and the sector-gear F are secured to a rock-shaft, f journaled in the frames A.

All theparts described as f, f W, and F to F inclusive, operate to deliver the sheet from the second cylinder, B, during its retrograde or non-printing rotation, and the cam F is so formed, proportioned, and angularly set upon the shalt D as to cause the fly-fingers f, through the connections already described,to commence to move over to the fly-board 0 when the whole of the sheet has passed upon said fingers. The fingersf will be away from the cylinderB when the tail m of the sheet passes by the place occupied by the points of said fingers while at rest upon the rod f on cylinder-bearers B The weight W requires to be. face of the cylinder.

the direct or printing rotation of the cylinder B. This position of said fingers will therefore allow the tail of the sheet elevated upon the sheet supporting fingers 0 as will. be hereinafter more fully explained, to pass unobstructed by said fingers. The cam F is so placed, however, as to bring the fingers F to rest upon the rod f by the time the cylinder B commences its retrograde or nonprinting rotation, and said fingers are so placed as to cause their points to. just clear the tympan upon the cylinder B sufficiently for the sheet to pass between them and the cylinder or its thin strip of steel 0, Fig. 4, on the direct or printing rotation. The tailm of the sheet elevated upon the sheet-supporting fingers 0 as shown in Fig. 4, will thus pass upon the fingers fand be stripped by them, from the cylinder B during the retrograde or non-printing rotation of said cylinder.

The details shown in Fig. 4. will now be described as follows Fig. 4 illustrates in two views a side and an end elevation, enlarged, of the cylinder B and certain details omitted from the other figures for the sake of clearness of illustration. In said figure the cylinder-grippers K are operated to open and close at the proper time in any of the usual ways. In the end elevation, in indicates the tail of the sheet, and o avery thin strip of steel extending across the cylinder B and tightly stretched in contact with the'usual blanket or tympan which covers said cylinder. The said strip 0 is thus stretched by meansof the adjustable slotted clamps 0, which may be secured in any position in the circumference of the cylinder B to suit different lengths of sheet by the screws 0 and screwholes 0?. The strip of steel 0 is riveted to the clamps 0, and the latter fit into grooves, one

at each end of the cylinder B, next to the These grooves are beveled on their inner sides, as shown, for the purpose of. tightly stretching the steelstrip 0 in contact with the blanket or tympan, allthe parts 0 and 0 being below the impression-sur- The thin strip 0 has formed on one of its edges, toward the tail of the sheet m, a series of stationary sheet-supporting fingers, 0, curved up slightly from the cylinder-surface. The strip 0, with its sheetsupporting fingers 0 is so placed (depending upon the length of sheet) that the tail m shall lie upon the slightly-raised fingerso", andthe strip 0 and fingers 0 are so placed that only the points of the fingers 0 remain under the tail m of the sheet, on which there is nearly always an unprinted margin. All these said parts will therefore clear those parts which make the impression, and as such parts are required to beonly type-highupon thebed,(thc chase, furniture, 850., beingon a lower plane,) the strip 0 and fingers 0 can come in contact with no obstructions in passing through the impression. The object in keeping. the tailm of the sheet slightly raised by the fingers 0 is to insnrethe entrance of the sheet upon the points of the fingers f as the cylinder B commences its retrograde or non-printin g rotation.

A small shaft, j is supported in slotted bearings in the frames A, in order to allow it to rise and fall with the cylinder B. Said shaft carries two or more pressure rollers or wheels,j bearing by their own weight only upon the cylinder B, and adjusted on the shaft j so as to run upon the unprinted margins of the sheet. A similar shaft, j, Figs. 1 and 2, carries two or more similar rollers or wheels, j,.bearin-g upon the cylinder B, and running in similar slotted bearings in the frames A. Two levers, j are pivoted, each at one end, to the frames A by the pivotsj, their central parts resting upon the tops of the cylinder side rods D The extended journals of the shaftj rest upon the free ends of the levers j. The ofiice of the pressure-rollers j and 3' is to cause friction between the cylinder-tympans and the sheets, and thereby to insure the passage of the sheets fully upon the fingers-fandf. In the case of the cylinder B, Figs. 1 and 2, the sheet is required to pass its whole length upon the fingers f, and the rollersj may remain in contact with the cylinder or the sheet upon it during the whole of the retrograde or non-printin g rotation of the cylinder, the journals of the shaft j resting in the bottoms of their slotted bearings when the cylinder is depressed and printing. In the case of the cylinder B the sheets run down thezfingersf only during the last part of the direct or printing. rotation of the cylinder, a portion of the tail end of the sheet still remaining upon the cylinder at the termination of its direct rotation. At this time, by the action of raising the cylinder B to clear the form for the'retrog-rade rotation, the lever j is raised by the cylinder side rod D, so as ,to lift the shaftj, and with it the rollersj, from the surfaceofthe cylinder, (or from the sheet upon it,) to allow theremainder of the sheet to be withdrawn from the cylinder B by the grippers of the cylinder B without resistance from the rollers j, which would hold the sheet in contact with the cylinder B, then reversed and running in the wrong direction for the delivery of the sheet, if said rollers were to remain in contact with the. sheet and press it against the retrograding. or retreating cylinder.

In Figs. 5, 6,.and 7 the grippers and the sheet-lifter fingers for the cylinder B are indicated respectively by the letters K and L. The said lifter-fingers are thin strips of steel slotted to embrace the tongues of said grippers, except at the ends. The inner or fixed ends of the lifter-fingers L are held in a slotted shank, L and project a short distance into a corresponding narrow groove in the rodL, as shown at L, Fig.7, and thus act as a feather or key to prevent the shank L from rotating upon the rod or shaft L. The shank L has an easy sliding fit upon the rod L, so that in making lateral adjustments of the grippers K upon said rod the fingers L may accompany them without other adjustments, the slots in said fingers preventing any lateral motion in them while in operation by reason of the tongues of 0 the grippers K are opened for the purpose of access to the tympan or other cylinder-coverin g. The free ends of the grippers K fall upon the unslotted portion of the fingers L when the grippers are closed, the fingers then lying upon the tympan, and thus the sheet is clamped between the upper sides of the fingers L. and the under sides of the grippers K. The hubs of the grippers K are wider than the tongues, and the fingers L have the same width as the hubs of said grippers at each side. Upon the hubs of the grippers K are formed cam-shaped projections K and the narrowsides of thefingers L lie upon the hubs of the grippers K. As said grippers are opened by the usual mechanism (not shown) the cams K cause the fingers L to rise by the springing of the fingers, carrying with them the gripper-edge or head of the sheet resting upon them. By the time the grippers K are wide open, as shown in section in Fig. 5, the fingers L are again lowered to rest upon the. cylinder B. When the grippers K are again closed to seiz e the sheet the fingers L are again lifted during that part of the cylinders retrograde or non-printing rotation just preceding the seizing of the sheet, but resume their place upon the tympan' beforethe grippers K close upon the sheet inserted between the grippers and said fingers.

In Fig. 8 is illustrated in section the-edges of cylinder-grippers with the lifter-fingers spaced between the grippers, the sheet being shown under the grippers and over the lifterfingers, as practiced in the older methods. The objection to such method is, as clearly seen in said figure, that the sheet isforced into a corrugated or distorted form at the'gripper-edge, thus interfering with accurate and certain lateral register. Fig. 9, however, illustrates the sheet in a straight line at its gripper-edge, as is the case when clamped directly on top of the fingers L, as provided for in Figs. 5,6, and 7, the object of which provision is fully carried out by said means and the said The following is a description of certain de- IIO tails illustrated in Figs. 10, 11, 12', and 13,-

at its end in a suitablebracket or bearing, clj,

attached to the frame A. .4 The vertical; shaft P is. similarly supported, and receives motion from the shaft cl by means-of the bevel-gears d and d. A horizontal shaft,-d journaled in theframes A, receives motionfromthe shaft d by means-of the bevel-gearsd iand cl". The? shaft (1 carries on the inside-of the frames A i a spur-gear, (i engaging a similar 'spur-gear, d'", upon a similar shaft, 01 parallel withthe shaft 01 and similarlyjournaled in the frames A. The shaft 01 carries a cylinder, d, with; a groove or slot,d parallel with its1axis,and a series of shallowcircumferen-tial: grooves, (1 into which the points of.a series of stripperfingers, d, enter. The shaft 61 carries a cylinder, c1 Fig.12, which has secured therein a; serrated knife, d parallel-with its axis, and: projecting beyond its periphery a sufficient distance, and so-situated with reference tothe groove al in the cylinder d and the gears d and (I as to-enter :the groove d ateveny; revolutionof thecy linders d and .61 and cut theweb of paper 19 running from the roll 19 1 into sheetsof the proper length. *The roll 19' 1 is carried in the brackets pfl extending from the frames A. A leading-roller, ii, is carried in similar brackets, 2 projecting from the.

frames A. Apressureor feeding roller, 19, is journaled in the'frames A, covered'with a yieldin g and frictional substance=-as felt, cloth, or rubber--and adjusted to presslupon theperiphcry of the cylinder (1. 1

The shaft j qis journaled :in slotted hearings in theframes A, and earries twoormorepressore-rollers, 3'. A similar and parallel shaft,

9' carrying similar rollers, j7,is1also journaled' in the frames A. A similar shaft, 9', parallel with theshaft jflcarries rollers j". The shaft j is driven from the pulley b on :the shaftd by the belt b, andthe shaft by ztapesor bel ts b running from the rollers j to the rollers j", these rollers acting as pulleys. 'Two'le-vers, j are pivoted to the frames A by the pivots their longer arms resting iupon the topsvof the side rods, d)", and under the lugs 7' projectin g inwardly from the side rods D". The extremities of the lol-rger arms-ofthe levers j operate to raise and lower the shaft j with its rollers j, as already explained in the description of Figs. 1 and 3. The journals of the shaft j rest-upon the extremitieslof itheshorter arms of the levers 9' by which means the shaft f and its rollers are raised and lowered at the proper times by the raising and lowerin g of the side rods 1)", the shaft j being up when the shaft j is down. The shafts j and j, with the tapesor belts b serve to convey the web 10, before being separated by the knife d to and between the rollers j or between their tapes or belts and the pressure rollers which latter convey the sheet to the pers of the cylinder B after "the knife (1 has separated it from the web 1). The rollers 7' being lifted from the sheet by the depression of the side rods D at the timethe grippers of the cylinder-B seize the leading edge of the sheet, the severed sheet is then carried by the cylinder B at its ownvelocity-without obstruction from the rollers f. The web 12 runs under the feeding-roller 12 between it and the cylinderd flover thetop of said cylinder, and :be-

tween it and the cylinder (1, the circumferiencesof'whichcylindersare eachexactly equal to the length of the sheet to be printed. A pair of levers, g, are secured to the rock-shaft g journaled in the frames A,.and carrying friction-brake, 1g, pivoted to the lowerends of the levers g, and "pressing against the'roll p by means .of the leverarmly, secured to the outer end of the rock-shaft 9 carrying the adjustable weight W. The ohjectof these last described parts is obviously to prevent the too rapid rotation of theroll of paper 1).

The folding attachment or apparatus iis in detail as below described.

A vertical shaft, h,dri\ien from the shaftiG by the bevel-gears rh carries on its upper end a :1 )ulley,h ,=which,through .thebelt h and pulley 7L imparts motion to one of a pair .of vertical rollers, h, :for m akin g the first'fold in the printedsheet, the-whole being earried Bin 2. suitable frame work or housing :built upon or forming extensions of the frame A.

"down upon said fingers during the oscillation of the flyfcomposed of said fingers and the folding-blade f")fron1 its position of rest upon the rod f :over to the folding-rollers h to which it delivers the sheet. The cam F in this arrangement is a closed or box cam similar to the cams D and Dflthe rollersupon the sliding bar F carrying it both upand down without the instrumentality of a weight, W,

suehas is shown in Fig. 1. Twoof thelingers f adjoining the foldin g-blade f are placed far enough from the blade f to permitof the folding-rollers h entering about to the depth of theirsemi-diameters between said fingers,the

'bladef then passing between the rolilers h xto crease and divide the sheet between .them for the firstfold,.as shown in Fig. l3,in which the folding-rollers h and fly-fingers f are illustrated in transverse section with saidfi-ngers in position fordeliverin g the sheet to the rollers, the form and position of the sheet at the time of enteringsaid rollers being also shown. I

In pressesof small dimensions built upon the above-described principle suificientspace cannot be had under the fingers f for an inkfountain, distributin g-rollers, &c. In such cases thewhole inking apparatus, including theformrollers It, may be placed at the backof the cylinder B, under the feed-board 0, Fig. 1, or un der the fingers (1 Fig. 10, where .there is amaratel y fed from a feed-board. The sheet fed inder in such an arrangement not running un-, der the form-rollers belonging to the other form.

The complete operation of this invention is as follows First, for printing from sheets sepfrom the feed-board to the usual guides is taken thence by the grippers K of the cylinder B just as said cylinder comes practically to rest by reason of the crank Gr having reached its dead center farthest to the right, Figs. 1 and 10. Correct registeris thus assured, as all ready described, having at this point caused the cylinder B to descend into position to make the impression, the cam D through its connections, simultaneously'raises the cylinder B to clear the form and the bed B causes the eylindersB and B both to rotate in the same direction. The cylinder B, at the commence- -ment of the stroke now described, having just completed the printing of the second side of grade rotation during this passage ofthe crank G from its right to its left hand center, and

the preceding sheet, now performs its retrodelivers the preceding sheet upon the fingers f, and also brings its grippers at the termina- -the lower ends of the fingersf to seize the advancing edge of the sheet coming from the tion of this retrograderotation into position at 1 :cylinder B. During this same passage of the crank G or stroke of the ibed B the cylinder completion of its first complete revolution the grippers K are opened. The lifter-fingers L then raise the advancing edge of the sheet up- B prints the first side of the sheet, and at the Q on the upper points of the fingers f, down which it passes by the performance of the last fractional part of a revolution of the cylinder 1 B, (said sheet being driven by the pressure of the rollers j, at this time resting upon it,) the head of the sheet reaching the bottom of the fingersf just as the grippers ofthe cylinder B arrive in place to grasp it, At this time all these parts 1 have come to a state of minimum motion by f reason of the crank Gr having arrived upon its dead-center at the left, Figs. 1 and 10. Thus the sheet is seized a second time under conditions insuring correct register upon the sec- 0nd cylinder, B, the highest speed attainable fering with said register.

by the cams D and D, as before described.

The raising of the cylinder B through the instrumentality of the levers j releases the rollers j from the sheet, a part of which sheet still remains upon the cylinder B, thus allowing the grippers of the cylinder B to draw the sheet unobstructed entirely from the surface of the the cylinder B and down the fingers f. The crank G continuing its rotation back to its starting-point, the cylinder B, now down, prints the second side of the sheet and continues to rotate sufficiently more than one complete revolution to bring the tail m of the sheet above the points of the fingers f, the tail end, m, of the sheet in the meanwhile resting upon the sheet i supporting fingers 0 until the cylinder B commences to perform its retrograde rotation to the position required to take another sheet. At this time, through its connections already described, the cam F has just brought the fly-fingers f to rest upon the rod f, the form of said cam being such as to retain them there until (another revolution of the crank G commencing) the sheet has been passed tail first down the fingers f, by said retrogression of the cylinder B, to the stop f, at which time the cam F, through its connections, causes the fly-fingers f to describe an are over to the fly-board 0, Fig. 1, delivering the sheet thereon, and then again returning it at the proper time to the stop-rod f to receive the succeeding sheet.

The arrangement and operation of the equilibratin g weights has been sufficiently explained in the description of the weights themselves and their connections already given.

In the arrangement of press illustrated in Figs. 10, 11, 12, and 13, and hereinbefore fully described, for printing from a continuous web or roll of paper and delivering to a folder attachment, the operations of the press proper are the same as those just described therefor. By the additional attachments, however, as has been explained in detail, the sheets are automatically cut from the web and automati- 'cally fed to the grippers of the cylinder B 5 but the fly-fin gers f, with their folding-blade f ,perform a shorter arc of vibration in delivering the sheets to the vertical folding-rollers it than if deliveringv fiat upon a fiy-board, the cam F being of course properly proportioned, formed, and adjusted to impart the necessary throw of the fly in either case. It is obvious, therefore, that these presses may be arranged to print either from the continuous web and deliver flat upon a fly board, or from sheets separately fedfrom a feed-board and delivered to a folder, by simply a suitable attachment of such proper parts therefor as have been herein described.

By means of the above-described system and arrangement of parts there is produced at comparatively small cost a machine capable of rapidly printing newspapers or other work on both sides, fed either from separate sheets or from a continuous web, and delivered IlO either flat or to a'folder, the work'bein g printed scribed for imparting motion to the fly-fingers,

nor for raising and lowering thcimpression-cylinders, nor for actuating the vertical foldingrollers, as allof these desired motions or movements may be efi'ected in many well-known ways but,

As of my invention, I claim 1. In a perfecting printing-press, in combi nation with one reciprocating type-bed carryin g two forms, twoimpression-cylinders geared to andcontinuously rotated in opposite directions by said bed, and arranged, substantially as described, so that one 0 'linder takes the sheet ator near its top when practically at rest for printing the first side of the sheet, and the other cylinder takes the sheet at or near its bottom when practically at rest,- as delivered from the top of the first cylinder, for printing the second side of the. sheet, substantially as and'for the purposes set forth.

2. In a perfecting printing-press, in combination with one reciprocating type-bed carrying two forms, two impressioneylinders and two sets or series of fingers or strippers, all arranged and operating, substantially as described, so that one cylinder delivers each sheet head first from its upper side'to and upon one set of said fingers or strippers inclined to the lower side of the other or second cylinder, whence the sheet is taken by the second cylinder and delivered tail first upon thesecond set' of fingers or strippers, substantially as and for the purposes set forth.

3. In a perfecting printing-press, in combination with one reciprocating type-bed carrying two forms, one or more reciprocating weights provided with a rack or racks, and

one or more gear-wheels running upon a stationary stud or studs and geared intermediatel y to said rack, and a rack or racks attached to the type-bed, said weights being so proportioned as to equilibrate the momenta of the reciprocating bed and attached parts,substantially as set forth.

4. In a perfecting printing-press constructed to print from two forms upon a reciprocating type-bed, in combination with two impression-cylinders continuously geared to and rotated by said bed, an automatic feeding and sheet-cutting apparatus, consisting of sheetcutting cylinders d and d, the pressure or feeding roller 19 the strippers or fingers d, the tape-rollers j and 7'", their tapes b and the lifting pressure or feed rollers f, wherebypaper in the roll is automatically fed in the machine, cut into sheets, and said sheets fed by the first-impression cylinder, substantially as set forth.

5. In a cylinder printing-press, in combination with cylinder-grippers provided with cam-shaped hubs, sheet-lifter fingers consisting of thin slotted blades resting upon said hubs, whereby the sheet is gripped. between the upper face of the sheet-lifter fingers and the lower face of the grippers and the edge of the sheet lifted from the cylinders surface by the operation of the grippers,substantially as and for the purposes set forth.

' JOHN T. HAWKINS. Witnesses:

G. A. CLEMENT, 1%. F. WHEELER.

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