US255181A - Thomas mcilkoy - Google Patents

Description

A(No Model.) l

TAB/101mm'.

GRIPPER ATTAGHMENT-FORPRINTING ,I DRESSES.I No. 255,181. f Patented Mar.21.1882.

MIM

UNITED? STATES THOMAS' ivteiLROY, OF BROOKLYN, NEWYORKQ GRIPEIR IAv`|"l'\`jC`Hl\/ IENT FOR PRINTING-PRESSES.

.SPECIFICATION forming part of Letters Patent No. 255,181,l dated March 21, 1882-,

Application tiled May 2, 1881. (No model.)

To all whom it may concern:

Be it known that I, THOMAS MCILROY, of

Brooklyn, in the c ounty'of Kings and State of New York, have invented an Improvement in Griper AAttachments for Printing-Presses, of

which the following is avspecitication.

1n printingLpresses the sheet is usuallytaken from the feed-board bygripers upon the impression cylinder. These gri pers are comparatively close together', and hence'arc adapted to sheets of different sizes; but the fingers or tongues upon which the sheet rests when taken by the gripers have to be adjusted to suit the position of the sheet that is to be printed, and also the positions ofthe gripers, for they must not interfere with the gripers on the inipres sion-cylinder as they Hy around and catch the sheet. In transferring the sheet from the im pression-cylinder to the delivery or fly cylinder a second set ot gripers is employed on the second cylinder, and these have to be placed soas to grasp the sheet and remove it from the impression-cylinder, and these second gripers must be adapted to the size ot' sheet that is to be printed, so as to grasp the same firmly and take the sheetaway; butthesecoud gripers must not come into contact vwith the gripers on the impression-cylinder.

The object of my invention is to facilitate the adjustment of the second set of gri pers to `take the sheet from the gripers of the impression-cylinder, and to allow for the supporting tongues or iingers at the lower end ot' the feedtable 'being properly placed by the simple inspection of the under side of the feed-table, when the lowerhinged portion thereof isturned back for that Iiurposqthereby lesseniug the atnountof time and labor expended in placing the parts properly when there is a change in the printing that is done on the press.

Inl the drawings, Figure 1 is a side view of the printing-press as far as necessary 'to illustrate the special feature ot' `my improvement. Fig.2shows part of the under side ot' the hinged feedboard; and Fig. 3 shows the indicator-bar that is employed in setting the gripers of the second or transfer cylinder.

The impression-cylinder a is provided with the row ot gripers b upon lthe shaft c. These 5o are of any usual character.

d is the t.'eed-table,with the feed-board eacross its lower end, the same being hinged at c', so f -that it may be turned back upon the feed-table for the adjustment of'. the sheet-supporting'. Afingers or tonguesf, that project over theillt pression-cylinder. VEach finger has a block at its backend, that is notched to set over. a dovetailed bar, i, and the said blocks-'canbe moved laterally, so as to place the fingers in the required position for holding the lower 6o edge ot' the sheet ready to be taken by the gripers, and each finger is retained in place by friction after it has been adjusted to position. lis the gage for the lower edge of the sheet.

The parts thus far described are of the usual construction; but it is difficult to adjust the positions ot' the fingers or tongues f so that the sheet will be properly supported without the risk of the lingers being in the way of the gripers upon the impression-cylinder. cilitate this I make use of indicator-marks upon the dovetailed bar i, or upon the under side of the feed-board, that denote the places'where the griper-tiugers are upon the impression-cylinder, so that when the feed-board is turned over 7 5 and the fingers are being moved into the positions required for supporting the sheetitisonlyr necessary to avoid placing the supporting-tingers at the places thatcorrespond with the grip-m ers. Hence when thefeed-boardis turned back 8o to its place the fingers will be adapted tosup V porting the sheet, and also be out of the way of the gripers. Hence there is no time lost in turning the feed-board back and moving the lingers in one direction or the other, and then trying the parts to see if they are properly placed, and this adjustment of the fingers can be made without the necessity of turning the impressioncylinder around so that the gripers are adjacent to the fingers. In placing the 9o second set of gripers, n, which are upon the delivery or iy cylinder o, still more difficulty has been experienced, becausethe gripers of the delivery-cylinder are inaccessible when they are near the gripers of the impression-cylinder. 95

In order, therefore, to enable the workman to know exactly where the gripers of the impression-cylinder are placed, I make use of an in.- dicator-bar, r, upon which are marked the positions of the gripers on the impressionv-cyliuroo der, and this bar r is rmly secured between the frames of the press near the under side of To fa- 7o the feed-table, and in the place where it is most convenient to obtain access to the gripers n. Hencein setting these gripersit is only required that a comparison be made of the gripers with the indicator-har to enable the workman to set the gripers u so that they will entirely avoid the gripers bof the impression-cylinder as the sheet is taken from the impression-cylinder to the delivery or ily cylinder. By means of this indicator-har the loss of time usually arising in setting the gripers ofthe delivery-cylinder is avoided.

I remark that I prefer and use separate pulleys, each one having a griper, n, and move the pulleys cndwise of the shaft, so as to set the pulleys andgripers in the required places, instead of hayi n g a complete cylinder for said gripers.

The marks may he made upon the shaft of the delivery-cylinder, if desired, for indicating the position of the grpers on the impressioncylinder.

I claim as my invention- 1. The combination, with the im pression-cylinder and its gripcrs, of a hinged feed-board, 2 5 adjustable fingers, a bar carrying the same, and an indicator at the under side of such feedboard to denote the positions of the gripers, substantially as set forth.

2. The combination, in a pri11ting-prcss,of 3o the impression-cylinder and gripers, adeliverycylinder and gripers, and an indicator having marks that denote the positions of the gripers on the impression-cylinder, substantially 'as set forth, whereby the gripers of the delivery-cy1 inder can be placed so as to avoid contact with the 'gripers on the impression-cylinder, substantially as specied. A

Signed by me this 27th day of April, A. I). 1881.

THOMAS MOILROY. Witnesses:

GEO. T. PINCKNEY, WILLIAM G. MOTT.

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