US365952A

US365952A - Pcters

Info

Publication number: US365952A
Authority: US
Publication date: 1887-07-05
Anticipated expiration: 1904-07-05

Description

(No Model.) 4 Sheets-Sheet 1 s. D. TUCKER. SHEET DELIVERY APPARATUS FOR CYLINDER PRINTING MACHINES. No. 365,952. 7 Patented July 5, 1887" wa /w (No Model.): 4 Sheets-Sheet 2.

S. D. TUCKER.

SHEET DBLIVERYAPPARATUS FOR CYLINDER PRINTING MACHINES.

; No. 365,952. Patented July 5, 1887.

I 9 HIHHHIIHWIH H 5171312 6i I Inve 71%07 N. PETERS, Phnlwlilhugraphor, Washington, 0.0.

(No Model.) 4 Sheets-Sheet 3Q S. D. TUCKER.

' SHEET DELIVERY APPARATUS FOR CYLINDER PRINTING MACHINES.

No. 365,952 Patented July 5, 1887..

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.(No Model.) 4 Sheets-Sheet 4.

S. D. TUCKER.

SHEET DELIVERY APPARATUS FOR GYLINDER PRINTING MACHINES.

No. 365,952. A Patented July 5, 1887 UNITED STATES PATENT Orriea.

STEPHEN D. TUCKER, OF NE\V YORK, N. Y.

SHEET-DELIVERY APPARATUS FOR CLYINDER PRINTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 365,952, dated July 5, 1887.

Application filed July 0, 1886. sen-.11 No. 207,537. (No model.)

To ctZZ whom it may concern:

Be it known that I, STEPHEN D. TUCKER, a citizen of the United States, residing at New York, county of New York, and State of New York, have invented certain new and useful Improvements in Sheet-Delivery Apparatus for Cylinder Printing Machines, fully described and representedin the following specification and the accompanying d rawings, forming a part of the same.

This invention relates particularly to the rotating delivery carrier or cylinder of a cylinder printing-pressthat is to say, the carrier which operates to take the sheets from the impression-cylinder and deliver them to the fly or other similar piling device, by which they are piled one upon another upon the pilingtable.

It is the object of the invention to provide means by which the ink upon the freshly printed sheet will be prevented from coming 1nto contact with the surface of the rotating carrier and thereby offsetting,so as to soil and injure the sheets.

As a full understanding of the invention (an be best given by a detailed description of the mechanism in which it is embodied, all preliminary description of the invention will be omitted and a detailed description given,

reference being bad to the accompanying drawings, in which Figure 1 is a partial side elevation of an ordinary form of carrier printing-press provided with a delivery-cylinder constructed according to the present invention, only so much of the press being shown as is necessary to'illustrate the application of the improvements. Fig. 2 is an end elevation of the same, looking from the left of Fig. 1. Figs. 3, 4, 5, and 6 are views, upon an enlarged scale, illustrating the construction of the delivery-carrier; and Figs. 7 and S are views, upon a still larger scale, illustrating a modification, which will be hereinafter referred to.

Referring particularly to Figs. 1 and 2, it is to be understood that A represents a portion of the frame-work, B the bed, 0 the form, D the impression-carrier, E the feed board or table, F the delivery-cylinder, and G the fly, of an ordinary form of cylinder printing press. ,The bed B is provided with any of the ordinary forms of connection, (not shown,) by

ranged in the usual position above and at one side of the impression cylinder, and. the fly F is arranged beneath the outer end of the feedboard in the usual position and is provided with the usual devices (not shown) by which it is vibrated at the proper times to receive and deposit the sheets uponthe piling'table.

The delivery-carrier F, which may consist of a continuous roll or drum, but will preferably -be composed of a number of rings or pulleys,

as is shown in the present case, is located at the side of and in close proximity to the int pression-cylinder and in such position as to be between the impression-cylinder and the upper end of the fly when the latter is in its raised position. The delivery-carrier is driven in unison with the impression-cylinder in any suitable manner, as by the gears 49 50, and is provided with ordinary sheet grippers, which are operated at the proper times to take the sheets from the impressioncylinder, transfer them to the delivery-carrier, and then deliver them onto the fly to be piledl. It will readily be seen that, with the mechanism thus organized, when each sheet is transferred from the impressioncylinder to the delivery-carrier its last oufreshly-printed side is brought neXt to the surface of the delivery-carrier, thereby frequently causing the ink from the freshly-printed sheet to offset onto the surface of the carrier to such an extent as to soil the sheets.

. It is the especial object of the present invention to obviate this dimeulty; and to accomplish this result these pulleys or portions of the carrier which underlie the printed por tions of the sheet are slightly depressed and are provided with fine points or projections which operate to sustain the sheet and prevent its freshly-printed surface from coming into contact wit-h the surface of the carrier.

The construction of the delivery-carrier will now be more particularly described. This carrier, as'stated, consists in the present case of a number of pulleys, which are mounted upon a shaft, 48. The end or outside-pulleys, 47, are connected by a bar, 46, which serves as a seat for the grippers to close against to grasp the leading end of the sheet. These two pulleys are also provided with bearings for the gripper-shaft 12. Located just inside of the pulleys 47 are a pair of pulleys, 45, which are of the same size as the pulleys 47,

- and are so adjusted as to lie just beneath the blank side margins of the sheets.

Between the pulleys 45 are arranged a num ber of pulleys, 44, which are slightly smaller than the pulleys 45 47, and areprovided around their peripheries with fine points or projections 9, which are of sufficient length and are sufficiently numerous to sustain the sheets and prevent them from coming into contact with the surfaces of the pulleys. The points 9 may be rigid studs or pins, as shown in Figs. 2, 5, and 6; or they may, if preferred, be formed by freely-turningorfixedstar-like wheelsordisks, which wheels or disks may be arranged to turn on studs projecting from the sides of the pulleys 44, as shown in Fig. 7 and 8; or they may be arranged in slots in the peripheries of the pulleys.

The grippers 10 may be operated in any suitable or convenient manner. As shown in the present instance,ithe gripper-shaft 12 is I provided with an arm, 13, which is acted on to close the grippers by a spring, 14, which is arranged in the usual or substantially the usual manner. The opening of the grippers to release the sheets is effected by means of a stationary cam, 15, which, engages with a stud or bowl, 8, on thearm 13 of the grippershaft, while the opening of the grippers preparatory tov taking the sheets is effected by means of a rocking cam, 16, which is moved by an arm, 17, which is acted on by a cam, 18, on the shaft of the impressiorrcylinder.

In order to insure the sheets being carried around by the delivery-carrier after their leading ends have been released by the grippers of the delivery-cylinder, and also to prevent the sheets from being drawn off the delivery-carrier by their own weight and falling suddenly down in front of the fly, there may and preferably will be provided a pair of light disk-like rolls, 43, which rest with their weight upon the pulleys 45, and thus grasp the margins of the sheets and carry them forward and prevent them from being drawn off the carrier prematurely. The pulleys 45, and also, if desired, the pulleys 44, may be made in two parts, as shown in Fig. 4, so that they can be shifted to different positions on the shaft 48, to conform to the width ofthe sheet being printed, and the disks 43 will be made adjustable laterally on their shaft 42 to correspond.

The operation of the improved deliverycarrier, in connection with the other parts, is as follows: The sheets will be taken by the by the grippers 10 and clamped onto the bar 46, and transferred onto the deliverycarrier. As the sheets are thus transferred onto the delivery-carrier, their blank margins will overlie and rest upon the pulleys 45, while their freshly-printed portions, which overlie the pulleys 44, will be sustained and held out of contact with the pulleys by the points 9, and thus the fresh ink will be prevented from offsetting. As the leading ends of the sheets arrive above the upper end of the fly, theywill be released by the grippers 10, and, as the ends of the fly-fingers extend inward between the pulleys of the delivery-carrier, the sheets will be directed off the carrier and will pass downward in front of the fly and he piled.

If in any case the fly-fingers should smut the sheet by coming into contact with the freshlyprinted surface, this may be avoided by providing the fly-fingers with the star-wheels 19, as shown in Fig. 5.

Although, as before stated, it is preferable to make the delivery-carrier of a number of pulleys, as shown, it is not necessary to doso. It may be a continuous drum or cylinder, such parts of its surface as underlie the printed part of the sheet being provided with the points 9, either in the rigid form or in the form of the star-wheels set into the cylinder.

What I claim is- 1. The delivery-carrier F, provided with points 9, for holding the sheets out of contact with its surface, and provided with the adj ustable pulleys 45, having smooth peripheries and arranged to underlie the margins of the sheets, substantially as described.

2. A delivery-carrier composed in part of rings or pulleys havin'g points on their peripheries and in part of rings or" pulleys having smooth peripheries, substantially as described.

3. The delivery-carrier F, composed in part of pulleys provided with the points 9, for holding the sheets out of contact with its surface, and in part of pulleys having smooth pcripheries, in combination with the coaeting feeding-pulleys 43, substantially as described.

4. A'delivery-carriercomposed in part of rings or pulleys having points on their peripheries, and in part of rings or pulleys having smooth peripheries, some or all of said rings or pulleys being made in parts so as to be ad justable with relation to each other, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

STEPHEN D. TUCKER.

\Vitnesses:

' Guns. W; CARPENTER,

RICHARD KELLY.