US256641A - Island - Google Patents

Description

(No Model.) 3"Sheets-Sheet 1.

0. B.G.OTTREi. L. DELIVERY APPARATUS 03 PRINTING PRESSBS. No1 256,641. I Patented Apr.18,1882, I

N4 PETERS. Fholwumognphur. Washi Q QQQQ cv 3 Sheets-Sheet 2. 0,13. OOTTRELL. DELIVERY APPARATUS POR PRINTING PRESSB S.

(No Model.)

No. 256,641. Patented Apr. 18,,188 2..

WWUN N. PETERS, Fhalo-Lrlhbgraphcr. Washinglan. D. Q

(No Model.)

3 Sheets-Sheet 3. G. B. OOTTRELL.

DELIVERY APPARATUS FOR PRINTING PRESSES.

No. 256,641 Patented A r. 18,1882

iii 7 N. PETERS. Fhowlilhognpher. Wuhingum D C- UNITED STATES PATENT OFFICE.

CALVERT B. GOTTRELL, or WESTERLY, RHODE ISLAND."

DELIVERY APPARATUS FOR PRINTING-PRESSES.

SPECIFICATION forming part of Letters Patent No. 256,641, dated April 18, 1882.

' Application tiled December 24, 1881. (N0 model.)

T 0 all whom it may concern:

Be it known that I, CALVERT B. Oo'r'rRELL, of Westerly, in the county of Washington and State of Rhode Island, have invented certain new and useful Improvements in Sheet-Delivcry Apparatus for Cylinder Printing-Fresses, of which the following is a specification.

This invention relates generally to sheet-delivery apparatus for presses in which the receivingtable is arranged in front of the impression-cylinder and grippers are employed to take the sheet from the impression-cylinder and carry it to and deliver it upon the said table with itslast printed side uppermost; but it relates more particularly to that class of delivery apparatus in which the gripper-shaft and attached grippers are supported in bars or rods which swing over from the cylinder to the receiving-table. In delivery apparatus of the lastmentioned kind, as heretofore constructed and organized, the gripper-shalt in swinging over has been made to describe the arc of a circle of a radius equal to the whole length of the rods or bars, and the sheet is carried through the air very high above the press, thus making considerable room above the press necessary.

One object of my invention is to remedy these defects; and to this end the invention consists in the combination, with the impression-cylinder and receiving-table, of barsor rods carrying the gripper-shaft and grippers, and having both a swinging-over and a longitudinal movement, so that when they areat about the middle of their swinging movement or in an upright position they will not project to a great distance above the press, but will carry the sheet comparatively low down, yet high enough to insure the clearing of the inkin g apparatus.

The invention also consists in novel mechanism, hereinafter described, whereby the bars or rods are moved longitudinally or shortened between the fulcrum on which they swing and the gripper-shaft as they approach an upright position, and are movedin the reverse direction or lengthened between their fulcrum and the gripper-shaft as said bars or rods move away from such upright position.

The invention also consists in novel mechanism employed for opening and closing the delivery-grippers and for holding them open during their passage from the receiving-table back to the cylinder and for holding them closed during their passage from the impression-cylinder with a printed sheet to the receiving-table, all of which features of invention are more fully hereinafter described.

In the accompanying drawings, Figurel represents a side view of such portions of a press as are necessary to illustrate my invention. Figs. 2 and 3 represent face views of two cams employed therein. Fig. 4 represents a plan of certain portions of the press. Fig. 5 represents a plan view, on a larger scale, of one of the'bars or rods which carry the gripper-shaft, parts ofits actuating mechanism, and the gripper-shalt and appurtenances. Fig. 6 represents a section on the dotted line as .r, Fig. 5. Figs. 7 and 8 represent detail sectional views of certain parts of the operating mechanism for the gripper-carrying rods or bars, on the same scale as Figs. 5 and 6. Fig. 9 represents a transversesectiou of the gripper-shaft, and a side view of the grippers, which are open, their appurtenances, and a portion of one of the bars or arms supporting the gripper-shaft. Fig. 10 represents a similar view with the'grippers closed. Fig. 11 represents an outside view of a portion of the bar or rod carrying the grippershatt and the bearing for the shaft. Fig. 12 represents a transverse section of the gripper-shaft and appurtenances, and a portion of one of its bars or rods. Fig. 13 represents a plan of one end portion of the grippersha-ft and its appurtenances, and a horizontal section of a portion of one of its bars or rods; and Fig. 14 represents a side view of a portion of the receiving-table, a portion of one of the bars or rods carrying the gripper-shaft, and an end view of said shaft and its appurtenances, showing the parts adjusted for delivering the printed sheet,ont'o the receiving-table. Figs. 9 to 14, inclusive, are on a larger scale than any of the other figures.

Similar letters of reference designate corresponding parts in all the figures.

A designates the frame of the press, and B designates the impressio rcylinder. The bed is not here shown; but both it and the cylinder may be of any suitable construction, and

the mechanism for imparting motion tothem may be of any suitable character, none being here shown, as it forms no part of my invention.

Odesignates the feed table arranged as usual with reference to the cylinder B, and D designates the receiving-table arranged in front of the cylinder.

Referring now to Figs. 5, 6, 7, and 8 in connection with Figs. 1, 2, 3, and 4, Edesignates standards erected on the opposite sides of the frame A and supporting a transverse shaft, F, and the shaft F is surrounded by a tubular shaft or sleeve, G, which likewise extends nearly across the entire width of the press. Upon one end of the shaft F is securely fixed a spur-pinion, a, (see Fig. 7,) and I) designates a rack-bar which is held in engagement with said pinion by a friction roller, 1), and which is moved lupward and downward to rotate the shaft F alternately in opposite directions by a cam, H, on a shaft, H, arranged below and longitudinally ofthe pressbed, as seen in Fig. 1. The form of the cam H is clearly shown in Fig. 3, and it is constructed with a groove, 0, which receives a stud or roller, 0, on the rack-bar b.

In the standard E, which is adjacent to the pinion a, is fixed a stud or stationary axle, d, (shown particularly in Fig. 5,)and on this axle is loosely mounted a sleeve carrying a spurpinion, d, and a larger wheel, 0. The pinion d is engaged by a rack-bar, d which is held in engagement therewith by a friction-roller, d, and the rack-bar d? is moved upward and downward to oscillate the pinion dand wheel c, or to rotate them alternately in opposite directions, by a cam, H on the shaft H, the form of which is best shown in Fig. 2. The rack bar d is bifurcated to receive the shaft H, and has a stud or roller, d, which engages with a groove, d, in the said cam H The wheel 0 gears with a pinion, e, which is keyed fast to the tubular shaft or sleeve G, as shown clearly in Fi 7, and the wheel 0 thereby imparts to the said sleeve a rotary motion alternately in opposite directions and independent of the motion ot'the shaft F. 011 the sleeve G, adjacent to the pinion e, is keyed a pinion,f, and on the opposite end ofthe sleeve is a similar pinion,f, similarly secured on the said sleeve, and between the pinion a and the pinion e is a triangular frame, g, which is keyed or otherwise fixed to the shaft F, as shown clearly in Fig. 7.

I designates bars or rods which are arranged one on each side of the press, and which are in line with the pinionsfon the tubular shaft G. On the under side and adjacent to the tubular shaft G the bars or rodsI are'provided with racks f, which engage with the pinions f, and in order to hold the racks in engagement with said pinions I make the latter with a circumferential rahbet, f on each side, as shown in Fig. 7, and provide the bars or rods I with cheek-piecesf, which receive the teeth of the pinions f between them, and are thereby held against side movement.

The racks f on the bars or rods I are held in engagement with the pinionsf by means of friction-rollers g, carried by the frame 9, and overlapping the top of the bar or rod, as seen clearly in Figs. 5 and 6, and it will be understood that the rollers g and the point of contact between the pinion f and the bar or rod I hold said bar or rod and cause it to swing freely when the shaft F and frameg are turned. One or the other of the rollers g bears on the top of the bar or rod I when the frame 9 is turned, and the other roller is moved at the same timeto relieve the bar or rod of its pressure. If desired, one bar or rod I might engage directly with the pinion' c.

I have before explained how the bars or rods I might be moved longitudinally by the pinionsf on the tubular shaft G, and both the swinging of said bars or rods and their longitudinal movement may be performed at the same time, as neither movement interferes with the other.

At the end of the bars or rods I, opposite the shaft F, is the grip ier-shaft J J, which I will describe hereinafter. After the grippers have taken hold of the printed sheet which is on the impression-cylinderB, the bars or rods I, and with them the gripper-shaft, are moved longitudinally to bringthe gripper-shaft nearer to the shaft F, and thereby to shorten the bars or rods I so far as they may be considered levers. As the longitudinal movement of the bars or rods continues the shaft F commences to turn, and thereby swings the bars or rods upward onthe said shaft as a center, the longitndinal movement continuing meanwhile. When the bars or rods reach an approximately upright position they have been moved to their greatest extent in one direction longitudinally, and as the bars or rods pass this upright position and recede from it the bars or rods commence to move in the opposite direction or to lengthen, and when the grippers reach the position shown in dotted lines in Fig. 1 the bars or rods have been adjusted to their normal length. This shortening and subsequent lengthening of the bars or rods I during the swinging movement thereof is very desirable, as the printed sheet is moved through the air low down, instead of in a semicircular path, as they would do if their portions which serve as levers were of invariable length. Hence it will be seen that my press requires very much.

less head-room than one in which the bars or rods which carry the gripper-shaft are of invariable length. When the bars or arms are in the position shown in full outline in Fig.1 the grippers are in position to take the sheet from the cylinder B,and the bars or rods I are then supported on rests 1', whereby a portion of their weight is taken 011' the shaft F and the straining of any of the mechanism is obviated.

I will now describe the construction and mode of operation of the grippers, which are best shown in Figs. 9 to 14, inclusive.

The gripper-shaft J is hollow, and has pins or journals h secured inits ends and fitting in ICO ' the bars or rods I.

' the paper.

boxes or bearing-blocks h, which are adapted to move slightly in openings or slideways h in The shaft J has a longitudinal portion, J, cut out and fitted to it, and thelower gripper-jaws, i, are secured to the portion J of the shaft, while the upper jaws, i, are secured to the upper portion, J, of the shaft. The two gripper-jaws M are hinged together at 01 and hence it will be seen that these hinges virtually connect the part J of the shaft to the part J. When not otherwise actuated the gripper-jaws i t" of each pair are held together by an elastic band,j, surrounding them, but any other suitable means may be employed for the purpose. The parts J J of the shaft have arms 7c is attached to and projecting from them, and these arms are connected with a pair of toggle levers or links, 1 1. When the toggle-links l l are straight or in line the grippers t' t" will be held apart or open until such time as the said levers are deflected or broken down, when the grippers will be closed and'held by the elastic or spring bands j, which surround them. Whenthe grippers are moving toward the cylinder to take a sheet the toggle-levers Hare inline, as shown in Fig. 9, and the gripper-jaws t t" are thereby held apart. As they reach the cylinder the jaws i i pass on opposite sides of the edge of the. printed sheet, andjust at this instant the middlejoint of thetoggle-levers strikes against a stationary stop, m, projecting from the frame or other fixed part of the press, and the toggle-levers are thereby deflected from the straight line or broken, as shown in Fig. 10, so that they no longer hold the jaws '41 i apart, but allow them to be closed by the bands or springsj to grasp During the movement of the grippers toward the cylinder the bearing blocks or boxes h have been against the inner end of the openings or siidewaysh in the'bars or rods I; but after taking the sheet, and as the bars or rods commence their longitudinal movement away from the cylinder, the boxes h are not moved until the outer ends of the openings or slideways k strike upon them, thus allowing of a slight movement of the bars or rods independently of the boxes h. 7

Upon the parts J J of the shaft, close to the bars or rods 1, are secured arms or fingers n a,which are hinged atn like the gripper-jaws, and in line therewith, and attached to the inner sides of the said bars or rods, are blocks or Fig. 12.

projections a which have in them V-shaped notches, forming cams, as shown clearly in When the bars or rods I commence their longitudinal movement, as above described, the blocks a are forced upon the converging ends of the fingers a a, and the grippers are thereby clamped tightly on the sheet, so that they will not be likely to slip in drawing the sheet from the cylinder.

Attached to the part J of the gripper-shaft is a weighted arm, 0, which tends to a perpendicular position, and on the upper sides or edges of the bars or rods I are stops 0, against which the upper fingers, n, are pressed by the weighted arm. By means of this weight and stop the grippers are held so that they will pass on opposite sides of the sheet and the fingers a a, so that they will be in line with the notched block a. In swinging on the shaft F the bars or rods I are turned completely over, but the gripper-shaft being controlled by the weight 0 does not so turn, but maintains approximately its position. As the bars or rods I approach the end of. their swinging motion, as shown in Fig. 14, they come into proximity with a standard, K, on the receiving-table D. One arm or projection, 19, on the standard acts upon an arm, 1), projecting from one of thejournals h of the gripper-shaft J J, and thereby turns the grippers downward, as shown clearly in Fig.14, so that the sheet will readily slip from them, and at thesame time the center joint of the toggle-levers l 1 comes in contact with a finger, g, on the standard K, which straightens said levers into line, and thereby opens the grippers and allows the sheet to drop, printed side up, on the receiving-table. The grippers then remain open during the whole of their movement-toward the cylinder, and are closed on asecond printed sheet, as before described.

In lieu of the divided gripper-shaft being tubular, it may be of any other form or con struction, one gripper of each pair being at tached to one part thereof and the other gripper of each pair to the other part; or the divided gripper-shaft may be constructed in the form of two separate bars arranged side by side.

By my invention I provide a gripper-carry ing mechanism in a press of this class, which occupies less room while in operation than those heretofore made, and I also provide a very simple and positively-operated gripper mechanism.

What I claim as my invention, and desire to secure by Letters Patent, is- 1. The combination,withtheimpressidn-cyL inder and the receiving-table arranged in front thereof, of bars or rods carrying a grippershaft and grippers, and having both a swinging-over and a longitudinal movement, substantially as and for the purpose herein de scribed.

IIO

2. The combinatiomwith theimpression-cylfor imparting to said bars or rods their longitudinal movements, substantially as and for the purpose herein described.

4. The combination of the shaft F, sleeve Gr, pinion a, and frame g, fixed to said shaft, pinions cf, fixed to said sleeve, bars or rods I, connected wheels d e, and rack-bars b d, all substantially as herein described.

5. The combination, with delivery-grippers and a gripper-shaft, of toggle-links for opening said grippers and holding them open, and springs for closing them, substantially as herein described.

6. lhe combination, with a longitudinallydivided gripper-shaft and arms projecting from the two parts thereof, and grippers also attached to both parts of said shaft, of togglelinks connecting said arms and serving to keep the grippers apart, and springs for drawing them together, substantially as herein de- 20 scribed.

7. The combination of the divided grippershaft J J, the grippers i i, the arms k 7c, the toggle-links l l, and the stops m q, substantially as herein described.

8. The combination, with gripper-carrying rods or bars, sliding boxes fitted thereto, a gripper-shaft fitted to said boxes, and pairs ot' grippers attached to said shaft, of converging lingers attached to said grippershaft and cams 0 upon said rods or bars for holding said fingers closed, substantially as herein described.

(3. B. .COTTRELL.

Witnesses:

HENRY T. BROWN, T. J. KEANE.

Images