US597114A - Sheet-delivery mechanism for printing-presses - Google Patents

Description

(No Model.) 2 Sheen-Sheet l.

R. W. JAMESON. SHEET DELIVERY MECHANISM EUR PRINTING PRESSES.

ATTHNEY.

tNo Model.) 2 Sheets-Sheet 2. R. W. JAMIESON. SHEET DELIVERY MEGHANISM POR PRINTING PRESSES.

Patented Jan. 11, 1898.

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UNITED STATES PATENT Erice.

ROBERT YV. JAMIESON, OF ROCHESTER, NEV YORK.

SHEET-DELIVERY MECHANISIVIl FOR PRINTING-PRESSES.

SPECIFICATION forming part of Letters Patent No. 597,114, dated January 11, 1898.

Application filed February 13, 1896. Serial No. 579,113. (No model.)

To all wton't t may concern:

Be it known that I, ROBERT W. JAMESON, a citizen of the United States, and a resident of the city of Rochester, in the county of Monroe and State of New York, have invented certain nen7 and useful Improvements in Sheet -Delivery Mechanism for Printing- Presses, of which the following is a specification, reference being had to the accompanying drawings, in which- Figure lis a side elevation of a press-frame having my device applied thereto. Fig. 2 is a top plan view thereof. Fig. 3 is a view showing the gearing of the deliveryrolls. Fig. et is a side view of the driving mechanism of the movable bed of rolls. Fig. 5 is a side view of the mechanism for tilting the station- Fig. 6 is a side view of a portion of the frame of the apparatus; and Figs. 7, S, and 9 are diagrams showing the operation thereof. Fig. 10 is a top plan view of a part of the driving mechanism.

The object of my invention is to provide a sheet -`delivery mechanism for printingpresses, which, among other points of advantage, may he free from the mechanical diii'iculties incident to the use of tapes or bands and incident to the use of grippers, the same being, among other things, positively driven throughout and free from slip or lost motion. I attain these objects and other results herein described by the mechanism hereinafter set forth and claimed.

In the drawings, A is the frame of the printing-press provided with the usual feed-table A and the impression-cylinder A2.

By is the usual delivery-table.

O is a frame bearing a series of transverse shafts O', each of which bears a series of rollers O2. Of course a continuous roller extending from side to side is equivalent to the series of rollers G2 on a single shaft. The frame C is pivoted to the frame A-as, for instance, on the shaft Of at the extreme end of the frame. The end of the frame C normally rests upon a ledge CB on the frame A. Between the impression-cylinder A2 and the first rollers C2 there are aseries of stripper-fingers AB, which mk@ the reading edge or the sheet from the impression-cylinder as soon as it is released by the usual grippers and guide the sheet to the rollers C?. The shafts C are severally provided with gear-wheels c, which are geared together by the idlers c', so as to cause the shafts C all to revolve in the same rotary direction and with the same speed. On one side of the frame C, at the end most remote from the impression -cylinder A2, :is fixed a gearwheel Ci, Figs. S2 and 5, with which meshes a pinion Coperated bya crankhandle OU, and a pawl C engages the pinion or the gear-wheel C4. Upon rotating the pinion C5 the frame C may be lifted from the ledge O3 around its pivotal axis, so as to give access to the interior mechanism of the press, the inaccessibility of the interior parts of the present presses, and particularly the inkingrollers, being due in great part to the immobility of that part of the delivery mechanism adjacent to the impression -cylinden The engagement of the pawl C enables the frame C to be held in its lifted position at such angle as may be desired.

In continuation of the frame C is a second frame D, bearing transverse shafts D', carrying rollers D2, like the frame C. The shafts D are driven by gears d d', exactly like the shafts C of the frame C. The frame D', however, is movable and reciprocates toward and from the impression-cylinder A2. Then the frame D is in its extreme position over the receiving-table B, the two frames C and D are in line andthe upper surfaces of their rollers C2 and D2 are in the same plane, as shown in Figs. l and 2. Upon the end of the frame O most remote from the impression-cylinder are a pair of antifriction-wheels D3 in line with the side pieces of the frame D, and the ends of the frame D nearest to the impression-cylinder A2 are beveled to form a track D4, (see Fig. 6,) whereby when the frame D moves in the direction of the arrow in Fig. 6 it will be lifted and ride back upon the rollers D3. The frame D is pivoted on the shaft D most remote from the impression cylinder, and thus is free to rise over the rollers D3 at the end nearest to said cylinder. The shaft D', on which the frame D is pivoted, hears a beveled gear d2, which meshes with another beveled gear d5, which is splined upon a rotating shaft d4, which is set in stationary boxes d5 on the frame A. A carriage d6 carries a bearin g for the beveled gear d3 and slides on a way d'7, parallel to the shaft D4, and thus supports the end of the frame D, which is most remote from the impression-cylinder. One of these carriages d6 is set on each side of t-he frame D to support and to guide the end of the frame most remote from the impression-cylinder during the reciprocating movements. The shaft d4 is driven by beveled gears d2 (Z2 and a shaft d10, which shaft is driven from the driving-shaft of the machine. The shaft C' of the frameC most remote from theimpression-cylinder is driven by a bevel-gear c2, meshing with the gear cl3.

In order to cause the frame D to reciprow cate, I pivot on the side ofthe fram-eAl a lever E, which by pin-andslot connection e isA attached to one or both of the carriages d6. Two such levers may be employed one on each side of the machine. This lever is reciprocated by arpitman F, having a yoke f on the end' thereof straddling a shaft G, which is driven in exact time with the revolutions of the impression-cylinder A2. On the shaft G.' is a disk g, having the eccentric cam-slot g on one side thereof, into which extends a pin f' on the pitman F and actnates the pitman and the lever. This causes the frame D to reciprocate and in so doing to ride-up over the frame C, as shown in Figs. 8 and 9. The cam-slot is so formed that the frame D remains stationary in the position most remote from the cylinder A2 during such period of time as is necessary to receive the sheet from the rolls C2 and to convey it tothe end ofthe bed of rolls D2, this latter position of the sheet being shown in Fig. l. The shaft Gr has a driving gear-Wheel G', Figs. l and l0, upon it, which through the gears d andd13 drives a bevel-gear CP2, which drives another beveln `gear CZ on the shaft d10. The rolls are geared up to the requisite rotary speed by this system ofv gears.

The rollers C2 and D2 are driven constantly inthe direction of the arrows in Fig. 1. As soon as the leading edge of the sheet X leaves the impression-cylinder it passes upon` the stationary bed of 'rolls C, but is movedonward thereon by the revolution ofthe rollers. From the stationary bed C it is moved by the rollers to the bed D, and as soon as the leading edge of the sheet reaches a point, as shown in Fig. l, over the delivery-table the lever E begins to move the frame D toward the impressioncylinder, while the revolution of the rolls D2 feeds the sheet X oft the rollers D2 and deposits it, printed side up, upon the deliverytable. The revolution of the rolls D2 delivers the sheet from the rolls with the samespeed movement toward the impression-cylinder A, so that the sheet X is relatively stationary with reference to the impression-table during delivery thereto, and the frame D moves out from under the sheet. The frameD tilts upward in this movement, passes above the bed of rollers C2, and by thus tilting enables the sheet X the more easily to pass oft the rollers to the delivery-table. (See Figs. 8 and 9.)

As soon as thevf-rame D is moved to its limit thefsheet X is fully deliveredrtherefrom and it is returned to its other position. lVhile the sheet X is being delivered from the rolls D2 another sheet may be delivered from the impression-cylinder A2 to the rolls C2 and may pass to the rolls D2 as soon as the frame D has reached the posit-ion shown in Fig. l;

'but ordinarily the impression-cylinder makes two revolutions foreach sheet delivered, and

.in such case the frame D may move to its position away from the cylinder during the revolution of the latter when the sheet is not deliyered therefrom.

It is Well known that the tapes heretofore used in delivery mechanisms for printingpresses are constantly stretching and sagging and that the stretching of individual tapes Will differ from. the stretching of others in the same machine, thereby producing an uneven delivery of the sheets andl permitting them to bend andl Wrinkle; that the tapes often break, necessitating a stoppage of the press for repairs, and that the broken tapes fall upon the type-bed belowr andare led between the type-bed and the impression-cylinder` before the machine can be stopped, and thus frequently injure thetype and in particular damage expensive engravings or blocks for printing illustrations; that dirt of the various kinds existing about apressfclings to the uneven surface of the tapes,l and that they are difficult to clean. In order toobviate these serious andpractical diiiculties, I employ the novel feature in a delivery mechanism-of. one or morebeds of driven-rolls-insteadof tapes. The rolls` remain constant in form and in le vel, are very easily cleaned, and, not having the rough surfacev of the tapes, donot catch the dirt with equalfacility; and in the use of tapes lint therefromis constantly being produced and. is constantly dropping upon' the type-bed underneath, thereby clogging the type and interferingV withproper printing.

Of course friction-gearing is an equivalent for the spur-gearing c c2 and d d2.

I do not intend to limit my claims to any greater extent than their terms necessarily` imply.

W'hat I claim is- 1. The combination of animpression-cylin'- der; a delivery-table 3` a stationary bedof constantly-driven rolls for` receiving the sheet from the cylinder; and a tilting. bed of convstantly-driven rollsfor receiving the sheet from the stationaryrb'ed and delivering it to the delivery-table.

as is given to the frame D in its backward I 2. The combination of an impression-cylinf der; a delivery-table 3 a stationary bed of constantly-driven rolls for receiving the sheet `from the cylinder; and a reciprocating and 3. The combination of animpression-cylin- IOO IIO

der a delivery-table; a stationary bed of constantly-driven rolls for receiving the sheet from the cylinder; and a reciprocating and tilting bed of constantly-driven rolls for receiving the sheet from the stationary bed and delivering it to the delivery-table.

i. The combination of an impression-cylinder 5 a delivery-table; astationarybed of rolls constantly driven in one directiong and a reciprocating frame, movable into the same piane with the stationary bed to receive the sheet therefrom, and moving backward ont of said plane to deliver the sheet therefrom, and provided with devices for constantly moving the sheet resting thereon to the delivery-table.

5. The combination of an impression-cylinder; a delivery-tableg a constantly-operating mechanism, propelling the sheet toward the delivery-tabie, for receiving the sheet from the cylinder; and a constantly-driven movable mechanism for receiving` the sheet from the iirst mechanism and for delivering it to the delivery-table, said second mechanism being adapted to tilt and to pass above said firstmechanism.

C. The combination of animpression-cyiinder; a delivery-table; and a constantly-driven but stationary mechanism, for receiving the sheet from the cylinder; a reciprocating bed of constantly-driven rolls, movable into the same plane with the stationary mechanism to receive the sheet therefrom, and reciproeating toward the impression-cylinder to deliver the sheet to the delivery-table, and transversely pivoted at the end most distant from the impression-cylinder; means for guiding the other end of said reciprocating bed above the stationary bed; whereby the reciprocating bed is tilted to deliver the sheet therefrom to the delivery-table.

7. The combination of an impression-cylinder 5 a delivery-table; stationary mechanism for moving the sheet thereon and therefrom for taking the sheet from the cylinder and for delivering the sheet from said mechanism; a carriage provided with means for moving the sheet thereon and therefrom and mechanism for moving the carriage to and from the `delivery-table and into and out of the plane of delivery of said sheet from said stationary mechanism.

8. The combination of an impression-cylinder g a delivery-table; stationary mechanism for moving the sheet thereon and therefrom for taking the sheet from the cylinder and for delivering the sheet from said mechanism; a carriage provided with means for moving the sheet thereon and therefrom and mechanism for moving the carriage to and from the delivery-table and into and ont of line with said stationary mechanism.

ROBERT W. JAMIESON.

Witnesses:

E. H. MARsnLLns, ARTHUR R. SELDEN.

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