US395231A - Sheet-delivery mechanism for printing-presses - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.

J. T. HAWKINS.

SHEET DELIVERY MECHANISM FOR PRINTING PRESSES. No. 395,231.

Patented Dec; 26, 1888.

% Invw-nlov N. PETERS. PhOlOuLllhOgnpher. Wnshingfion. D, C.

(No Model.) 2 Sheets'-Sheet 2'.

J. T. HAWKINS.

- SHEET DELIVERY MECHANISM EOE PRINTING PRESSES. No. 395,231. Patented Dec. 25. 1888."

E 1 mmmnmu f Wtlivaww liuvmd'or:

N PETERS Phnwuma n hm Washi c.

NiTn STATES PATENT Trice.

JOHN T. IIAlVKINS, OF TAUNTON, MASSACHUSETTS.

SPECIFIGATION forming part of Letters Patent No. 395,231, dated December 25, 1888.

Application filed June 6, 1885. Serial No. 167,830. (No model.)

To all whom it may concern:

Be it known that I, JOHN T. HAWKINs, of Taunton, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Sheet-Delivery Mechanism for Printing-Presses, which invention or improvements are fully set forth and illustrated in the following specification and accompanying drawin The object of this invention is to provide a means of delivering the sheets from the top and front of a cylinder-press in which the impressioncylinder makes more than one revolution to an impression, so that said sheets may be conveyed and laid upon a receiving table with their last-printed sides upward without contact of the printed parts of said sides with any part of the mechanism during the process of delivery, and to do this without obstructing access to either the inkingrollers or ink-fountain, suitable means being provided for cutting the sheets in one or more lines in the direction of their motion during the process of delivery.

The invention consists of the part s and combinations of parts, as hereinafter described, and set forth in the claims.

In the accompanyin drawings, Figure 1 is a side elevation of so much of a two-revolution cylinder-press as is necessary to the full illustration of the invention. Fig. 2 is an end elevation of the machine viewed from the left of Fig. 1.

In said figures the dri vin mechanism which actuates the impression c vli nder, typebed, inking apparatus, cylinder grippers, and crank-shaft is omitted as not essential to the illustration of the invention. In said figures the respective parts are indicated by letters, as follows:

A A are the main frames.

A A are vertical sliding pieces, in the upper ends of which the imprcssion-cylinder I3 is journaled. The side pieces, A A have a small vertical mot-ion (imparted to them by mechanism not shown) to raise the impressioncylinder clear of the type or form during the retrograde or non-printing stroke of the bed B and to hold it in contact with the form during the printing-stroke in a manner usual with all two-revolution cylinder-presses.

B is the form; B the ink-plate.

The circles B, Fig. 1, indicate the positions of the form-r0llers, and R R the positions of the angle distributing-rollers.

R is the ink-fountain.

B are the bed-rollers, and B the bed-roller ways.

B is the feed-board.

Secured to the frames A A are two standards, C C, carrying the fountain R the bear- Y ings for the angle-rollers R, (not shown,) and the receiving-board Secured to the tops of the side pieces, A A is a pair of standards, D D. In the upper ends of the standards D D is journaled a shaft, On the shaft D outside of and close to standard D, is secured a gear-wheel, D and on a stud, D, projecting from the standard D runs an idler-wheel, of the same diameter as and meshing with the gear D On another stud, D projecting from the top side piece, A runs a second idler gear-wheel, D of the same diameter as and meshing with the idler gearwheel Secured to the shaft of the impression-cylinder B is a gear-wheel, D of half the diameter of the gear-wheels D D D and meshing with the gear-wheel D By means of the four gear-wheels last mentioned the shaft D is rotated once to every two revolutions of the impression-cylinder B. Secured to the shaft I) are two arms, E E. In the free ends of the arms E 1 is journaled a rock-shaft, F to which is secured a series of grippers, f. Attached also to the free ends of the arms E E is a bar, E upon which the points of the grippers f close. The bar E has notches f cut in its outer edge at points not covered by the grippers f for the passage of the oscillating grippers, hereinafter described, and of the cylinder-grippers g. The grippers f are operated to close upon the bar E by a spring, f. To the end of rock-shaft F outside of and close to the arm E, is secured a lever, f Pivoted to a stud, f projecting from the arm E, is a lever, f carrying a roller, f. Levers f f are connected by a rod, f pivoted to each. Secured to standard D is a stationary cam, f engaging the roller f", and so formed and placed as to open and allow the spring f to close the grippers f at two places, as

hereinafter described. The cylinder-grippers g are operated in any usual way to receive the sheet from the feed-board l3 and to re lease it to the grippers f as they close upon G is a grooved sector secured to shaft D, a portion of which is projected at G, Fig. 1, to show the groove.

G is a rotary knife carried in bearings G which are in turn secured to a rod, G", which extends between the two brackets A A The knife G engages the groove in the sector G for the purpose of dividing the sheets as delivered in the direction of their motion, as is often required.

\V are weights for counterlmlancing the parts attached to the shaft D The shaft F is journaled in the frames A A, and by suitable gearing (not shown) is made to revolve once for every two revolutions of the impression-cylinder B, or once to each sheet printed. Secured to shaft F is a crank-disk, F. J ournaled in the standards 0 O is a rock-shaft, F adjoining the standard 0, is a bell-crank lever, F and on the side adjoining the standard C a single-armed lever, F. The short arm of the bell-crank lever F is connected to the-'crank-pin F by a connecting-rod, F. In the free ends of levers F" F is journaled a rock-shaft, a, to which is secured a series of grippers, a. Secured in the free ends of the levers F F is also a stationary rod, (L to which is secured a series of tongues, a against which the grippers a close by the action of a spring, a. To the rock-shaft a is secured a two-armed lever, (1 having a notch, a, cut in its lower arm.

Mounted loosely upon the rod (1 is a twoarmed lever, a whose short arm is made to engage the notch a and a correspomling arm of the lever w by the spring u A stop-pin, b, erected from and secured to the receivingboard C engages the upper arm of lever a at the outward extremity of the motion of the arms F F", thus opening the grippers a. The lever (0 by the act-ion of spring a is then caused to engage the notch in the lever a and hold the grippers open until, upon the inward extremity of the motion of the levers F E the roller Z), carried on the end of the shaft F engages the long arm'of the levercfi, thus throwing said levers short arm out of the notch in the lower armof the lever and allowing the grippers a to again close by the action of the spring a.

The operation of the above-described devices is as follows: A sheet being taken from the feed-board B by the cylinder-grippers g is held thereby until printed during the first revolution of the impression-cylinder B. The gears D D D D cause the arms E E, and

Secured to shaft F with them the grippers f, to arrive at the proper time to take the advancing edge of the sheet at the same moment of time as released by the cylinder-grippers g, the grippers f being opened and closed by one of the elevations on the cam f acting upon the roller f. The sheet is then carried into position, as shown by the dotted lines S, Fig. 1, the arms E E and the levers F F being shown in position in dotted lines at S S Fig. 1, when the grippers a close upon the sheet, arresting its further progress simultaneously with the grippers f, being agaii'i opened by the other elevation of the cam f The arms F F are then carried, by the operation of the crank-pin F, into position shown at S Fig. 1, the stop-pin b releasing the sheet to fall upon the receiving-board 0 as indicated by the dotted lines S" and as limited by a sheetstop, During the printing of the succeeding sheet the arms F F, and with them the grippers a, are carried back to meet the arms E E upon their next revolution to take the succeding sheet.

I do not confine myself to the method herein described of operating the rotary arms E E and their grippers f, nor to making the same to describe one revolution to each two revolutions of the impressioil-cylinder, as it is ob vious that they may make the same number of revolutions as the impression-cylinder and be geared directly to it by one pair of wheels only, and that the rockshaft F and oscillating arms F 1 may be brought into proper position to meet such construction; nor do I confine myself to the method shown for operating the lovers F F and their grippers a, as said parts may be actuated to fulfill their functions in many ways, as best suited tothe remaining mechanism of the machine. I do not herein claim the mechanism shown for cutting the sheets, nor confine myself to the use of any form of sheet-cutting mechanism.

Having thus fully described my said improvements, as of my invention I claim- 1. In a cylinder printing-press, in combination with its impression-cylinder and a continuouslyarotating gripper mechanism, an oscillatin g mechanism provided with a series of grippers, as a, adapted to receive the sheets from said rotating grippermechanism, whereby the sheets are first taken from the top and front of the impression-cylinder by rotating grippers and then received therefrom by oscillating grippers and further delivered there from to any suitable receptacle, substantially as and for the purposes set forth.

2. In a cylinder printing-press, in combination with an impression-cylinder, as B, provided .with grippers, as g, a sheet-delivery mechanism consisting of carriers, as E E, operated continuously in a circle and provided with grippers, as f, taking the sheets from the top and front of said impression-cylinder, carriers, as F F, oscillated back and forth and provided with grippers, as a, a receivjug-board, as C and means, substantially as parts of said sides with any partof the mechdeseribed, for opening and closingsaid three anism, substantially as set forth.

sets of grippers at the proper times, whereby the sheets are taken from said impressioneylinder and conveyed to and dropped upon \Vitnesses: said receiving-board with their last printed ELISHA T. JACKSON, sides upward, Without Contact of the printed J. F. HALEY.

JOHN T. IIAYKINS.

Images