US1907139A - Printing press - Google Patents

Description

May 2, 1933. H. v, BALL 1,907,139

PRINTING PRESS Filed March 25', 1951 Patented May 2, '1933 UNITED STATES PATENT ourlet:

HARRY V. BALL, OFl CONCORD, MASSACHUSETTS, ASSIGNOR TO R. HOE CO., ING., OF

NEW YORK, N. Y., A. CORPORATION OF NEW YORK PRINTING PRESS Application led March 25, 1931. Serial No. 525,150.

The invention relates to printing presses, and particularly to that class of Vvprinting presses which are known as web printing machines, and in which a web of paper is fed by suitable mechanism between the impression cylinder' andv the form cylinder upon which the plates are held which print the Vdesired matter upon the paper.

In printing machines of the kind referred to, such as are known in the prior art, the web is fed directly to the printing cylinders with but a relatively small amount of wrap around the impression cylinder both above and below the point at which the web is engaged by the printing plates. In such a construction, the pressure of the plates against the web is depended upon to pull the web through the machine, and as a considerable amount of tension is frequently employed upon the web roll to resist rotation of the same in order to prevent a run ahead of the roll when the press is stopped quickly, the result at times is a drag and slippage of the web over theprinting plates, which results in smutty printing. One of the principal objects of the invention is t0 provide means to press the web against the surface of the impression cylinder and thus insure that the web runs at the Same speed as the periphery of said cylinder and consequently doesV not slip over the printing plates. Further objects and advantages of the invention will be in part set forth in the following specification and in part will be obvious therefrom without being specifically pointed out, the same being realized and attained by means of the instrumentalities and structural characteristics and relative arrangements and combinations which will be hereinafter fullyJ described or which will be pointed out in the claims hereof.

V7 ith the above and other objects of the invention in view, the invention consists in the novel construction, arrangement and combination of various devices, elements and parts, as set forth in the claims hereof, one embodiment of the same being illustrated in the accompanying drawing and described in this specification.

In the accompanying drawing,

Fig. 1 isa diagrammaticl view showing that portion of a web printing machine which includes the printing cylinders that print on the first side of the web, the second printing on the opposite side being performed later, in a manner which willbe well understood. A typical arrangement of inking mechanism is shown, to supply ink to the plates carried on the form cylinder; and

F ig. 2 shows a form of the pressure cylinder provided withl a center bearing, as will be explained hereafter. Y

In carrying my invention into effect in the embodiment thereof which I have selected for illustration in theaccompanying drawing and for description in this specification, I provide supporting means, portions of which are shown diagrammatically in the drawing and designated 4, in which are journ'aled various moving lparts of the mechanism, comprising an impression cylinder 5, a form cylinder 6, form rollers 7 ink cylinders .8, and ink rollers9. Most of these parts are standard construction and are well known in the art, and shown here only diagrammatically, the essential feature of the invention here being the feeding roller 10 which acts to press the web 11 against the surface of the impression cylinder as it passes upward around a portion of the periphery thereof, to insure a suflicient frictional engagement between the web and the periphery of the impression cylinder 5, to insure the proper feeding of the said web to the form cylinder 6.

The feeding roller 10 is located below the impression cylinder 5, as shown in Fig. 1, being journaled in roller vbearings 19 borne by upwardly extending arms 12 which are supported by the shaft 13, the said arms 12 being borne by sleeves 17 which are loose on said shaft V13 and adjustable as hereinafter described. In the caseof a small impression cylinder 5 and feeding roller 10 the support ofthe latter at the ends as above mentioned might be suiicient. But the printing cylinders of large newspaper presses are ordinarily of large size, the fullv width of a web of paper being about 70 inches.- vA-feeding roller adapted to such the middle of the roller 10 is journaled in.

roller bearings 30, borne at the upper end of an arm 1li which is fast upon 'the shaft 13. One end of the shaft 13 extends Alat' erally beyond the supporting frame 4i, .as shown in Fig. 2, and bears a downwardly extending arm 22, which arm bears a nut with which engages an adjusting screw 24 operated by a wheel 23, by means of which the shaft 13 may be rotated and thereby the position changed of the arm 14, which is fast thereon, thus controlling and adjusting the pressure of the middle part of the feeding roller 10 upon the impression cylinder.

The adjusting mechanism for the end bearings is similar to that already described for the centre bearing, the sleeves 17, which are loose on saidshaft 13 and which bear the upwardly extending Aarms 12, having also downwardly extending arms 18 analogous to the arm 22, wi-ich arms 18 bear at their lower ends nuts 20 with which engage adjusting screws 16 operated by wheels 21, analogous to the adjusting screw 24 and wheel 23, thus controlling and adjusting the pressure of the end portions of the feeding roller 10 upon the impression cylinder 5.

The operation of my invention will be obvious from what has been above said with regard to its construction.

The advantages of the invention will also be obvious from what has been above said, and need not be here again particularly pointed out.

I do not limit myself to the particular details of construction set forth in the foregoing specification and illustrated in the accompanying drawing, as the same refer to and set forth only one embodiment ofthe invention, and it is obvious that the same may be modified, within the scope of the ap pended claims, without departing from the spirit and scope of the invention.

Having thus described my invention, whatk I claim as new and desire to secure byzIiet-v ters Patent is as follows:

1. In a web printing machine the combination with a supporting frame andan impression cylinder and a form 1 cylinder journaled therein and adapted tohave passed between them a web` of paper or the like, of a shaft mounted in said supporting frame and bearing a plurality of sleeves rotatable thereon, each of said sleeves having an upwardly extending arm and a downwardly extending arm, a feeding roller the ends of which are Vjournaled in said upwardly extending arms and adapted to have passed between it and said impression cylinder a web of paper or the like, a nut on each of said downwardly extending arms, and a ro tatable screw journaledv in said supporting frame and `adapted to coact with each of saidnuts so as to swing said downwardly extending arms and thereby adjustably locate `said feeding roller with reference to saidy impression cylinder: the point of contact ofthe said feeding roller and said impression cylinder being at a point on the periphery; of the -impression cylinder at a substantial distance away from the point of contact of said impression cylinder vwith said forni cylinder. g

2. In a web printing machine the` combination with a supporting frame and an impression cylinder and a form cylinder journaled therein and adapted to have passed between them a web of paper or the like, of a shaftadjustably rotatably, mounted in said supporting frame and bearing an upwardly extending arm rigidly mounted thereon, afeeding roller comprising a pluralityof sections,a portion of one of said sections being journaled in said upwardly extending arm, a downwardly extending arm rigidly attached to said rotatably adjustable shaft, a nut on said downwardly extending arm, and arotatable screw journaled in said supportingframe and adapted to coact with said nut so as to swing said downwardly extending arm and thereby rotate said rotatably adjustable shaft and swing said upwardly extending arm rigidly connected with said shaft and thereby adjustably locatev the portion of said feeding roller journaled in said last-mentioned .upward-` ly extending arm with reference to said impression` cylinder.

In witness whereof I have hereunto signed my name this 23rd'day of March, 1931.

HARRY V. BALL.

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