US92050A - Phen d - Google Patents

Description

tac-a Cerca RlCHARD M. HOE AND STEPHEN D. TUCKER, OF NEW YZRK, N. Y.

Letters Patent N 92,050, dated June 29, 1869.

INIPROVEMENT. IN' PRINTING-PRESSES.

The Schedule referred to in these Letters Patent and making part cf the same.

Figures 3 and 4 represent our machine as constructed with three cylinders in cach series, the operatlon'of which will beA fully set forth hereafter.

- Similar letters of reference indicate like parts in the v several drawings.

Our invention consistsf First, in so arranging and combining with each other, two series of alternatingforl n-cylinders and impressioncylinde1's,\vith the necessary inking-inachinery, that any described number of rollsof paper or vsuccession of separate sheets may be printed ou both sides in passing once through the machine;

Second, iu applying to the impression-cylinders a travelling-blanket, in the form of an endless web or apron, instead of applying it to the surface of the cylindex' as heretofore, whereby a greater surface of blanket can be employed, so that the L set-off from the printed side of the paper, being distributed over this larger surface of blanket, will consume a correspondingly longer time before it can become sufficient to react injuriously on the paper;

Third, in so arranging the travelling-blanket that it willaid in sustaining the paper as it passes from .one

- series of cylinders to the other;

Fourth, in combining the travelling-blankets with a series of form and impression-cylimlers; and

Fifth, in mechanism for sustaining the cylinders, whereby they can be easily and quickly removed and replaced, when it is required to change the form or blanket, or for any other purpose.,

To enable others skilled in the art to make and use our invention, we will describe the construction and operation ofthe same.

A represents the'frame-work of the machine, so constructed as to properly hold and support the various operative parts.

In the sides of this frame are arranged suitable bearings m m, for the journals n a of-the impression-*cylinders B B* and thrill-cylinders O C. llthe cylinders of each series are connected together by gear-wheels t Ii i,

secured on their journals, through theA medium of which the proper movements are communicated to each cylinder.

On the 'ends of the journals of the cylinders Bl Cl are secured two bevel-gears H H, which are driven by the pinions I I on the shaft a, through which the necessary power is applied to operate the machine.

The form-cylinders C C* Gl are provided with the necessary hiking-apparatus g gh h, and the impres-V sion-cylinders B Bx B2 are furnished with travellingblankets J J. Y

These blankets are made in the form of an endless band, of the saine width as the cylinders around which they pass, and are held in proper position by the rollers b b b, which, furnished with adjustable bearings jj, hold the blankets at all times at the proper tension, and support the paper in its passage to the nest pair of cylinders. f

Suitable bearings or supports for the rolls of paper, D D* D, are arranged upon the franieand proper mechanism, of a forni similar to that now in use in printing-machines, is attached to and combined' with the machine for each roll of paper, when rolls are used, for separating the sheets from the rolls as they are printed.

The machine being provided with the necessary attachments ofsheet-tliers, receiving-tables, inking-apparatus, Svc., connection is made with the driving-power, and the operation proceeds as follows:

The sheet d tiom the tirst roll passes around the impression-cylinder B, and receives an impression on its undersurlace from the form-cylinder C'. The sheet then y.

passes through tothe opposite set of cylinders, and receives the secondimpressiou on its upper surface from the form-cylinder C.

Tle second sheet d* at the same time receives an lmpression on its under surface from the form-cylinder (y, and on its upper. surface from the form-cylinder O, from which the under surface of the iirst sheet d is also printed.

Simultaneously with these operations, the third sheet d is printed .on its under surface from the form-cylinder (J, and on its upper surface from the form-cylinder The printed sheets, vafter being separated from the rolls by the cutting-mechanism, are laid upon the receiving-table by the sheet-fliers. A

By the arrangement of the cylinders it will be seen that the form-cylindersGl G2 print the opposite sides of the separate sheets at the same time, and that the cylinders Bz perform the office of impression-cylinders for the form-cylinders O C* (ll-C3.

1t will also be evident, that by an addition of another impressiou-cylinder to the form-cylinder C, and of another forni-cylinder toy the impression-cylinder B3, a fourth roll of paper may be printed upon, and so on ad I'bitam. v

i The cylinders from which two sheets are imprinted at the same time, are necessarily furnished with a. second set of inking-rollers, h h.

When it becomes necessary to change the blankets, the side of the frame lis removed, and the `bar k placed in position, as shown in fig. 1. The cylinder, with its journal-box m, is drawn out of the frame onto the bar k, and the blanket drawn from the cylinder over the end, and laidiu folds ou the bar, between it and the end ofthe journal n. The rod o is then attached to the end of the journal, and the cylinder is raised from the bar, by means of the nu't on the end of the rod o, sufficiently to allow of the bar being removed, so that bylifting one end ofthe roller b from its bearing, the blanket is drawn from the roller, and quickly removed ii'o'm the machine.

By proceeding with the operation in a reverse mauner, a new blanket may be easily aud expeditiously placed iulposition on the cylinder.

' In constructing a machine with our improvements, we prefer to use the arrangement, represented in figs. 3 and 4, of three cylinders in each series, the left-hand series containing two form-cylinders C C2 and one impression-cylinder B', and the right-hand, one formcyliiider C and two impression-cyliiiders B` B2.

By this arrangement the stereotype-forms, containing the principal part ofthe matter composing the paper, may be arranged upon the torni-cylinders G C, from vwhich one side of each sheet is printed, while the forms for the other side maybe kept open as long as possible, in order to get in the latest news, such being the custom in all newspaper-printing offices; andas it is very important to get to press with the least delay possible, itwill be readily seen that less time will be cousumed in taking one stereotype, and using one form t priut'the other side of each sheet, than more.

Having thus fully described our invention, \Vhat we claim, and desire to secure by Letters Pat ents l. The combinationand arrangement in a rmtinffsion-cylinders, as shown, whereby the same are iliade to perform the twofold duty of blankets and sheet-con.- veyers, 'thus dispensing entirely with the use of tapes for con veyiug the sheets, substantially as described and` specified.

3. The mechanism for sustaining the cylinder for changing the form or blanket, consisting of the rod o vand bar la, substantially as described.

RICHD. M. HOE. STEPHEN I). TUCKER. lVitnesses to signature of R. M. HOE:

.THOMAS G. OONNOLLY,

H. GARRETT. Witnesses to signature of S. D. TUCKER:

C. A. DURGIN, EDWARD E. OsonN.

Images