USRE13E - Improvement in machines for printing both sides of a continuous sheet of paper - Google Patents

Description

PATENT FFICE.

THOMAS TRENCH, 'or HANOVER, NEW JERSEY.

IMPROVEMENTIN4 MACHINES EDR PRINTINGYBOTH SIDES OFA CONTINUOUS SHEET 0F PAPER.

Specification forming part of Letters Patent No.468, dated November 20, 1:5375 RcssucNo. 13, dated September 17, 1839.

To all whom it may concern:

Be it known that I, THOMAS (FRENCH, of Hanover, in the county of Morris and State of New Jersey, have invented certain new and useful improvements in thev machinery for printing, by which machinery both sides of a continuous sheet or web of paper may, as it is delivered from the cylinder of the. papermachine, receive an impression as the paper is passed once through my machine; and I do hereby declare that the following is a full and exact description thereof.

In the accompanying drawings, Figure 1 is a perspective view of the machine. .l Fig. 2 is an elevation of the rear or opposit'side. Fig. 3 is alongitudinal and vertical section through the middle, the machine being supposed to stand in the same direction as in Fig. 2. Figs.

4 and 5are parts in detaihto be presently explained. y

In each of the figures, like parts are designated by the same letters of reference.

A A, Fig. l, is theframe of themachine, represented as made of wood; but it may of course be formed of iron, -in whichcase it would undergo that change of form whichv f would be appropriate to such material.

B and Bb .are two typecylinders, upon which the stereotype-.plates are to be secured. Theyare for this purpose made polygonal, the `cylinders being of such diameter and the faces of the polygons of such width as shall adapt-them to the particular kind of work to be executed. These type-cylinders are formedL by affixing staves of wood onto the peripheries of wheels, through the centers of which run the cylinder-shafts, whichA revolve in proper bearings on the frame of the machine.

. The staves, which are' distinctly shown in the drawings, are to be attached to the wheels by means of buttons, thumb-screws, or any other device which will admit of their being readily detached and others substituted .for

them. I also use typecylinders of different diameters, andjvaryingin their `number of faces, according to the sizeof the page to be printed. The lower sides of the staves are madeeoncave to adaptthem to the form of the ,perpheries of the wheels, and their upper sides ilat to receive the stereotypeplates,

which are tobe fastened to them by screws, clasps, or other well-known means. Across I the ends of each stave are affixed pieces cr is ,to be regulated. These plates may be about an inchwin width, and in their combined/capacity they constitute a polygonal rim orbearing around the type cylinders. Abovethe type-cylinders are two impression-cylinders,

to the sheet by their pressure on thetype-cylinders.- VThese may be made of wood or of yielding substance-su ch as felt, leather, gumelastic,&c.-for the purpose of giving a regular impression and of protecting the faces of I the' type-plates from injury." Around each end of these impressing-cylinders there are,

iron loops a n, adapted to run upon the bear-` ers mm of the type-cylinders:- Their height above the impressing-cylinders may be from a sixteenth to an eighth of an inch, and as the bearings m are adjustable the pressure ot' the impressing-cylinder upon the types may by this provision be perfectly checked and regulated. This may be ei'ected in various Ways-as, for example, by three screws oper ating on each bearing m in the well-known manner shown in Fig. 6.

*The bearings for the gudgeons aa of the impressing-.cylinders are in the levers or sidev pieces, l? P', of a frame, which works on fulcra S S arerods, attached at their upper ends to each side of the machine with eachother. The y lower ends of these rods are attached t0 levers S S', and by pressing upon .these levers the impressing-cylinders may be raised from the type-cylinders. The vibration 'ofthe frame and levers l? I enables the impressing-cylinthis particular the strength 'of the impression f C and c,which are for givingthe impression metal.; They are to be covered with some y at'Q Q'in standards p p on the main frame, the t cross-pieces, which connect the levers P P- on and whirls.

- sheet free. :down to and around the roller D e, and thence around rollers D D D until it arrivesagain at,

ders to pass regularly over the faces of the tapes passes down to and aroundthe roller D type-cylinders and round the corners or angles at their junction with each other.

The two type-cylinders may be` geared together by toothed wheels, as shown at G G G, so as to operate correctly in conjunction with each otherror theyl may be driven by bands The second ofthe type-cylinders, B b, I make about a fourth of an inch greater in diameter-than the first, B, to give tension to the paper and keep it tight and smooth in its passage from one cylinder to the other. The stereotype-plates are so arranged on'the faces of the cylinders as that in printing both sides of the sheet they shall make good register;

The sheet to be printed is conducted between two systems of endless tapes, on the same principle as in some other cylinder printing-machines; but as this machiney is intended to print on both sides of a continuous sheet as it is delivered from the machine for making paper in an endless web or sheet, the systems of tapes are so arranged as to adapt them to this particular purpose.

E and E are the two systems of tapes, which pass around rollers vD D, by which they are distended and have the proper direction given to them. The first system'of tapes, E, passes around three-fourths of the first cylinder, C- that is to say, from the point No. 1 to the lpoint No. 2-as shown in each of the Figs. 1, 2, and 3, and the. second system of tapes, E', passes one-half around the same cylinder C-that is to' say, from No. 3 to No. 2embracing the unj der side of said cylinder. These tapes may vary in number and position, as they must be so arranged as to pass on the margin and in the spaces between each page. They remain in contact with the paper on both sides of it Y during its passage through the machine, by

which means the end of the paperbeing once received or taken in between the two systems ing around this cylinder, and passing between it and the type-cylinder B b, where the sheetv receives its second impression on the side opposite to that first printed. The printed sheet and systems of tapes pass from the second typecylinderl over a guide-roller, D d d, after which the two systems separate and leave the printed The first system of tapes passes cylinder C, as will be clearly seen by inspecting `the drawings.

From the roller D (I d the second system of f, and thence around rollers D D D to the point 3 on the cylinder C, as shown in the drawings. y

U is a tightening-roller, which bears upon the endless tapes, its gudgeons rising and falling in standards furnished with slots to admit of their so doing. The continuous sheet, after being printed and freed from the guide-tapes, is carried off in the direction indicated'by the arrows pointing toward No. 5, and is passed H H are frames for holding the ink-boxes, v

rollers, and other parts of the inking apparatus. The frames H slide upon the main frame A, and are moved toward or from the typecylinders by theaction of levers 0 O. The

ink is put upon the types by composition-rollers. (Marked I I.) These rollers have their gudgeons running in boxes on the levers J J. (Shown in part in Figs. l, 2, and 3, but more distinctly in the sectional View oi this. part,

Fig. 4.) The gudgeon's of the large roller M also run in these levers, there being one such at each end of t-he system of inking-rollers. The upper inking-roller, I, is upon separate arms fi, so that it bears by its own weight upon the type-cylinders. These rollers are moved by their friction on the iron plates m, on the ends of the staves, and rise and fall by the action of the sides and angles of the said cylinders upon them. The rollers I touch and take. the ink from the large roller M, to which by their friction they communicate motion. The levers J .I by their gravity serve to press the lower inking-rollers against the types.

M', M2, and M3 are auxiliary inking-rollers.

to the rear one of which, M", the ink is first' communicated. This system of rollers receives mot-ion from each other bythe contact of their elastic covering. K is a distributingroller, operating upon the upper roller,I. This distributing roller has a vibratory motion longitudinally, its gudgeons running in two arms, which are made capable of rising and falling with the roller I, said arms being hung to the vibrating frameL.

The frame L,I which carries the distributingroller, slides endwise in the frame H. It is moved backward and forward by avibrating lever,l l. (Shown at the rear side ofthe machine, Fig. 2.). This lever works on a-j oint-pin at its center, h., attached to the frame A. The lever l l is attached at its two ends to the two sliding frames L L, and it is made to vibrate laterally by means of a wheel, jul, having on its periphery an undulating .threador projection, tt. (Shown separatelyin Fig. 5.) This thread is embraced by two pins projecting from the lever, to which it consequently communicates the desired mo- 1:; y y s` nomas ,this inns turn dots to the distributing:

roller.

N, Figs. 1, 2, 3, and 4, shows the box for containing the ink, which box is fastened-in the mode, to removethe superfluous ink there- -from.

On one of the gudgeons of this roller there is a ratchet-wheel, as at R, and when the roller W, which takes the ink from the metallic roller X, vis moved down upon it, a spring-dog, d, attached to the frame H, is pressed down by the lever y, and catches in said lratchet-wheel R, moves it round to a small distance, and brings up a fresh supply of ink to the roller W,which the latter communicates to the system of inking-rollcrs. This arrangement of the springdog and ratchet-wheel is shown separately in Fig. 1. The roller NV has its gudgeons running in the ends of two parallel levers-one at each of its ends These levers are shown at y, Figs. 2, 3', and 4. They move on joint-pins' or fulcra in the frame H, so as to admit of the rise and fall of thc roller in its action of receiving and giving ink. To carry this roller down there are pins c c, Fig. 2, projecting out from the ends of the type-cylinders, which, in the revolution of said cylinders, catch against the ends av of the levers y, raise them, and consequently depress the roller XV. W'hen relieved from thekaction of these pinsthe lever y falls by the superior gravity of its longer end x, when the roller XV. is brought into contact with the rear roller, M3.

lVhile the press. is in action the frames H HV -and their` contents are in a situation for the inking-rollcrs to supply the types with ink; but when it is put out of action, by raising the impressing-rollers the frames H H are made to slide back by the following device:

. O O'are levers connected to the frames H H at the lower ends of the arm O and weighted at the outer ends of their horizontal arms, so as to bring thc inking-rollers with any desireddegree of force against the type-cylinders.

l fl T are projecting pieces attached to the levers P I, and when they are brought down for the purpose of raising the impressing-cylinders these projecting pieces come into contact with the inner ends of the levers O O and cause the frames H H to slide back. Motion inthe first instance may be given to t-he machine by any adequate motive power.

Having thus fully described 'the construction of my printing-machine and shown how the same operates, I do hereby declare that I do not claim to be the inventor of a doublecylinder printing-press, machines so denominated having been previously in use, although differing, as I verily believe, in many essential particulars from that herein described; but

What I do claim as my invention, and desire to secure by Letters Patent, is 1 1. The particular manner in which I have arranged and combined the respective parts,

together, so as to print upon both sides of a continuous sheet of paper as it is delivered from the paper-machine, and thus to produce a new and useful effect lby means substantially ne'W-that'is to say, the manner of constructing 'the polygonal type-cylinders so as to adlInit of their being varied in size vand in the number of their polygonal faces-by which means they are adapted to the printing from platesof difl'erent'sizes, such variation being eected by changing the staves which form the peripheries of these cylinders. 2. The employment of the bearing-pieces m m on the yends of each of the staves of the type-cylinders, said bearing-pieces being made adjustable for the purpose of sustainingand regulating thc pressure of the impressing-cylinders, acting in combination with and by the running thereon of the iron rims vor hoops In ny `on the ends of said cylinders, causing the pressure, by this arrangement and by the rising and falling of t-he impression-cylinders, to

be equalizcd, whether made upon the at surfaces of the polygonal faces or in passing the 'angles between them.

' 3. In the inking apparatus, the combination of the lever l Z with the slides L L, and

with the undulating wheel w, for the purpose of giving a vibratory motion to the distributing-rollers, as set forth.

4. The manner of causing the vlevers P 1, when depressed, in order to raise the impressing from the type rollers to act upon the frame H and cause the inking-rollers to recede from th-e type-cylinders, the same beingeifected by `the intervention of the levers O O in the manner-described, not intending by the foregoing' description and claims to confine myself to the precise manner of forming and arranging. the

respective parts as herein set forth, but to vary these. as I may think proper, while I attain the same end by means substantially the same.

THOMAS TRENCH..

Witnesses:

STEPHEN VAIL, J As. CLARK.

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