US169796A - Improvement in rotary perfecting-presses - Google Patents

Description

J'. L. FIRM.

ROTARY PERFCTING-PRESS. l

No.169,796. Patented Nov. 9,1875.

UNITED S'r'rEs PATENT OFFIGE.

JOSEPH lL. Finn, or NEW Yoan, N. Y., AssIGNon or oNEnALF nis nren'r i 'ro cALvEnr B. cofr'rnnLL AND NATHAN BAnoocK, or wEsranLY, n. I.

IMPROVEMENT IN RQTARV PERFEC'UNG-PRESSES.`

Specification forming part of Letters PatentNo. 169,796. dated November 9, 1875 application filed September 7, 1875. i

CASE G.V

had to the accompanyingdrawing, which forms part of this specification.

One part of this invention relates to rotary printing-presses designed to print on both sides of the paper. as it passes through the machine. -Tliis part of the invention consists in a novel combination of two type-cylinders and two impression-cylindersT-that is, one type-cylinder and one impression-cylindereither of which is made to rise and fall, an'd one enlarged impression-cylinder and reduced type-cylinder, the whole operating together, so that the forms of both type-cylinders are double inked in or during the printing of the paper on its opposite sides'. Another part of f the'invention consists in a combination, with apaper cutting or printing machine, to which the paper is supplied in a continuous web or ro'll, a-nd'subseqnently divided into sheets, of a knife having the greater portion of its edge straight, but having portions of its edge serrated, whereby the sheet, when cut, has a clean A straight edge, but is not detached from the web till the requisite feed has been made.

Figure 1 represents a side view of a rotary printing-press, in part, having 'my invention applied; and Fig. 2, a similar view with the working-parts in a different position'. Fig. 3 is a longitudinal vertical section with the parts in the position represented in Fig. 1; and Fig. 4 a furthervertical'longitudinal section with the partsjn the position represented in Fig. 2.4 Fig. 5"`i's a vertical transverse section, in part,in illustration of the knife which cuts the web or roll.

A is the frame of the press constructed for printing on both sides ofthe paper. B is the iirst impression-cylinder,'and C its form cylranged between the knife K, which cuts the4 web or roll, and the irst impression and form cylinders B C. -J is the web of paper, -ied from a roll i'nto the press. f Said paper J, being fed to' the gripers a. of the impression-cylinder B as the latterand the type or form cylinder G rotate in the direction indicated by arrows in Figs. 3 anda, is carried round with the curved form C' of said type cylinder, and is printed on its one side. Atthe point where the impression cylinders B and D and the gripers b of the cylinder D meet the gripers a take the sheet or paper and transfer it to the impression cylinder D, by which, in connection with the curved form E' of the second, type 4or form cylinder E, the paper has its other side printed. rlhe cylinders B, C, and E are all of the same diameter; but the impression-cylinder D is twice thediatneter of the cylinders ByC, and E, and the several cylinders are so geared together that the cylinder D only makes one revolution for each two revolutions of the cylinders B, U, and E. Only a portion, c, of the circumference of the impression-cylinder D is designed to work in contact with the form or type cylinder E,theremaining portion d of said limpression-cylinder D being suitably eut away or reduced. This construction and relative arrangement or proportion ofthe impression-cylinder D to the type-cylinder E allows the latter to ink the form E twice to one impression of the cylinder D. Furthermore, the type-cylinder C, or it might be the impressioncylinder B, is made to rise and fall once during each revolution of the cylinder D, so that the type-cylinder C will only print when said cylinder is down, thereby inking, the lform O' twice to one impression of the cylinder B.

Various mechanical dei'ices may be em ployed to raise and lower the type-cylinder C; but a suitable means for the purpose is an eccentric, f, on each or opposite ends of the shaft of the cylinder D, and ina-de to vrock levers G, having intermediate fnlcrums g, which levers are constructed with jaws at their upper ends, to

i receive within them the shaft of. the type-cylindexe.

feed.

'l and Elare connected is lettered, respectively,

zhe usual or any suitable tapes are applied to said cylinders, or certain of them, for holdingon to the edge of the paper during its travel While being printed; but these and the inking devices it is not necessary hereto show.

The pressure and' feed rollers H H' i I', for conducting the paperto the type and impression-cylinders, are arranged in pairs one above' the other, and should also be provided with or connected by tapes for conveying and holding the paper at its edges. lThe upper -or ad- VAvance one, E, of these rollers may also he tted with gripers for taking hold of thefpaper.

- Said rollers H H I I' are geared to rotate in concert in the direction indicated by their re\ spective arrows by spur-,wheels l m n o p q.

Unlike the cylinders B,', D, and E, which have a continuous rotatory motion, these rollers H H i have an intermittent rotary inotion, for the purpose.v of stopping the feed of the paperduring the double inking of the form-cylinders C and E, and to hold on tothe f y paper while the forward portion ot the paper corresponding with the sheet to be produced iscanght and torn from the web at any suitable point between the feed-rollers or advance feed and pressure rollers H l', and the type and impression cylinders B C. If desired, said tearing operation may take place over the front edge ofanintermediatelyarranged board, J.

rlhe means for intermittently rotating the -feed and pressure rollers in proper relation with the impression and type cylinders4 may be varied; hut a simple means for the purpose consists in aeam or broken ring, L, on the face of the gear-wheel h of the impression-cylinder D, arranged so that when cominground it bears on alever, M, tothrow-the operatingwh'eel l ofthe feed and pressure rollers out of gear with the wheel y' of the nrst impressioncylinder, whereby the feed y,olf the paper is stopped while the form-cylinders C E receive their double hiking, and 4till after the impres-y sion-cylinder B or its gripers have got ahold.

1 on the paper to tear it apart between the feedrollers aud. the lirst impression and type cylspring,r,into' between the broken or interrlrped cam L, and the wheel l accordingly ptit into gear with the wheel j to actuate the lThe paper J is passed in a web from a roll,

p or otherwise, to the feed-rolls through aclainp or slotted frame, N, up and down' withinwhich a'knife, 0, is made to Work at intervals. This knife, unlike a mere serrated cutter, operating to perforate the. web thronghout its entire After the rear endof the cam L has -passed the lever M, the-latter is shot by a 'e y f noemen! width, so that it may be afterward torn ofi' at the perforated portion, leaving a ragged edge to the sheet, andnnlike a straight-edged eutter throughout its length operating to wholly sever the web, combine. both of these features A in the one device by constructing .said knii'e with the greater portion ot' its edge straight, but the other portion of its edge serrated, f Thus it is made straight at its edge portions' s; to give a clean or through out, and siichpoiet' tions set inciining to give 'a drawcnt, anii ser rated at its edge portions ato simply'perrcrate the paper at points in the length of the knife between or beyond'the straight-edge portions i of the latter.

. By means of this construction of. the knife, the portions of the paper perforated by the edge portions u of the knife present a Asucient continuity of the web to provide for the feed of the paper, yet admit of a free or ez-tsy tearple meanefor this purpose consists ot' a earn,

P, on 'the shaft of the cylinder D, arranged to operates lever, c, which, hy -rneens-of -fnrredg w, and arms or 'cranks and toes connected with a rock-shaft, Q, lifts the frame 0', which carries the knife as against springsx, having a reverse action on the knife-frame.

R is a feed-board, for the passage of slipy sheets to the impression-cylinder D, which may be provided with special gripers tie-gripe the slip-sheets as fed zfrom. the board, essentially as deseribedin my Letters atent No. 146,441, issued to me January i3, 1874.. y

' 1. Jlhe impression cylinder B and type-eylinder C, either-of which is. made 'torise and fall, as described, in combination with. thel enlarged impression-cylinder D and its reduced type-cylinder E, whereby the; forms 'of-.both

type-cylinders are double inked in ordering the printing/of the paper on its opposite' sides,

essentially as described. v

v -2. The combination', with a paper cutting or v printing` machine, of the.. knife 0, having the greater portion of its edge straight, but having portions ofits edge serrated, substantially as and forthe purpose herein described.

' JQSEPH L. FIRM. Witnesses:

MICHAEL RYAN, 4

' BENJAMIN W. HOFFMAN.

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