US594054A - Deliveet mechanism for printing presses - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

H. AQW. WOOD. DELIVERY MECHANISM FOR PRINTING PRESSBS. No. 594,054. Patented Nov. 23, 1897.

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H. A. W. WOOD. DELIVERY MECHANISM FOR PRINTING PRESSES. No. 594,054. Patented Nov. 23, 1897 llvv f .niflllllll/lllllll/llllllllllllllllllll/llllll/ll/J avwemboz witnesses m: "cams PETER! can. mo'raLm-lm wxsmna'mu. o. c,

NITED STATES ATiENT Enron.

HENRY A. WISE WOOD, OF NEW YORK, N. Y., ASSIGNOR TO THE CAMPBELL PRINTING PRESS AND MANUFACTURING COMPANY, OF NEW YORK.

DELIVERY MECHANISM FOR PRlNTlNG-PRESSES.

SPECIFICATION formingpart of Letters Patent No. 594,054, dated November 23, 189 7.

Application filed May 23, 1892. Serial No. 434,805. (No model.) i

The aim of this invention is to produce a new and improved delivery mechanism for cylinder printing-presses, and one which shall deliver the printed sheets printed side uppermost, always in full sight, without contact of the printed surface with any part and without the use of grippers.

To this end the invention consists of the device described and claimed in this specification and illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of enough of a printing-press to illustrate my invention. Fig. 2 is a plan of the same. Figs. 3 to 6, inclusive, are diagrammatical views illustrating the different positions of the delivery mechanism while manipulating a sheet; and Figs. 7 and 8 are detailed views of part of the tape-carriage-driving mechanism.

Referring to the drawings and in detail, A represents the usual framing of the machine, on which is mounted in the usual manner the feed-board B, and also journaled in the usual bearings is the impression-cylinder I. The impression-cylinder I is driven by means of the usual driving-gear 140 from the drivingshaft 143 by means of gear 141.

P represents the usual reciprocating bed, and the arrangement and operation of these instrumentalities are the usual ones, not necessary to describe here at length. A small shaft 9 is arranged, as shown, in suitable brackets, and this shaft has suitable stripperfingers 9 which are adapted to strip the sheet from the impression-cylinder after the same has been printed. This shaft g is oscillated by means of cam F, which is driven by means of gear E, connected to the same, and this gear E is driven from the small gear D, mounted on the impression-cylinder shaft. On the shaft g is an arm G, which has a roller 9, which bears on the cam F.

The reduction between the gears D and E is one to two, so that by noticing the shape of the cam F it will be seen that the stripperfingers g are lowered to take the sheet from the impression-cylinder at every other revolutionof the same, the particular printingpress shown being of the well-known tworevolution type.

After the sheets have been stripped from the impression-cylinder by the stripper-fingers they are guided onto a set of traveling tapes 115. These traveling tapes pass around suitable tape pulleys or rollers R, S, T, and U, as shown, and the tapes are driven in the direction indicated by the arrowin Fig. 1 from gear 0, fastened to the impression-cylinderI by means of intermediate H and gear J, fastened on the shaft 114, which is the shaft of the tape-roller R, and this gearing is so pro: portioned and designed that the tapes will travel at the same speed as the peripheral speed of the impression-cylinder.

The tape-roller R preferably consists of a number of tape-pulleys, as shown, and the tape-roller T also preferably consists of a number of tape-pulleys, as shown, mounted on the shaft 120, so as to keep the tapes in proper lateral position, and the tape-rollers S and U are simply straight rollers mounted on shafts 116 and121, as shown. 121, which carry the tape-rollers T and U, are mounted in a suitable reciprocating carriage V, and-this reciprocating carriage V consists of the side arms 112, which are tied together by suitable tie-rods 122, as shown.

Mounted on the framing are the brackets 110, and between these brackets and the brackets that carry the shaft 11 1 are arranged the guiding-rods 111, which may consist of round shafts, as shown, and the side arms 112 of the carriage V have bearings 113, engaging these shafts 111, so that the carriage V may easily reciprocate back and forth.

A bracket 131 is mounted in the us ual' man- The shafts and ner at the end of the press to carry the ink- 5 to convey ink from the fountain to the distributing-table and then on to the form on the bed in the usual manner.

The tape-carriage is reciprocated once for each complete excursion of the bed, andthe mechanism hereinafter described for reciproeating the same is so proportioned that the carriage will move at about one-half the speed at which the tapes 115 are traveling or onehalf the peripheral speed of the impressioncylinder.

The particular mechanism for reciprocating the tape-carriage consists of a shaft 146,which is driven from shaft 143 by means of pinion 142, intermediate 144, and gear 145, fastened on the shaft 146. Secured on one end of the shaft 140 is a crank-arm 147, which is connected by link 148 to the reciprocating yoke 149, which yoke embraces the shaft 146, as shown, whereby as the crank 147 turns the yoke will be reciprocated up and down. On the end of the yoke 149 is formed a rack 150, which engages a small pinion 151, secured upon a shaft 150, mounted in the brackets 110, and on this shaft 150 are mounted gears 152, which engage racks 153, formed or attached to the under side of the side arms 112 of the reeiprocatin g carriage V. The pinion 151 is mounted eccentrically on the shaft 150, as shown,- and on the side of this pinion are formed bosses 101 and 192, and engaging these bosses is the hood 190, through which the rack 150 passes, whereby the rack will always be kept in proper mesh with the pinion, although the same is eccentrieally mounted on the shaft 150. The object in mounting this gear eecentrically is to compensate in great measure the varying movement imparted by thecrank, and the parts are preferably so arranged that the tape-carriage will be given about a uniformly reciprocating movement while the sheet is being dropped from the same, as hereinafter described, and so that the tapes will slightly accelerate the sheet just before the same is delivered and just at the completion of the delivery, and whereby the sheet will be nicely dropped.

Suitable guide-fingers M are arranged over the roller S to guide the sheet from the upper part of the tapes down over the roller S to the second part of the tapes, and similar guidefingers Q are arranged over the roller U, as shown, and also on the end of the table 130 are arranged suitable stops 160, against which the sheets come as they are finally delivered.

It will be seen that the roller T is always between the roller S and the impression-cylinder and that as the carriage reciprocates back and forth the tapes 115 will be always kept taut, because as much tape as is taken up by one roller T or U is let out by the other.

It will thus be seen that my delivery mechanism consists of a set of driven tapes onto which the sheet passes, and that this set of tapes runs around two stationary rollers, as R and S, and two reciprocating looping-rollers, as T and U, and that these rollers are so arranged that the top part of the tapes runs from the first stationary roller to the second stationary roller and from the second stationary roller around the looping-rollers, and that the under part of the tapes runs from the last looping-roller back to the first stationary roller. By this means the loop of the tapes will lie under the last stationary roller S, and the loop in the tapes will reciprocate under the last stationary roller. By this arrangement the sheet will first pass onto the portion of the tapes between the two stationary rollers R and S, and will then run down over the stationary roller S onto the up per portion of the tapes carried by the looping-rollers, and, further, it will be seen that the sheet will pass nicely onto the tapes, as that portion of the tapes between the rollers R and is kept quiet and free from the vibration of the moving carriage which carries the reciprocating looping-rollers.

The operation of my device will now be described, and reference, to understand the same, should be had to the diagrammatical figures.

In Fig. 3 the impression-cylinder is shown as just taking a sheet from the feed-board B, the grippers N just closing upon the same. In this position of the parts the tape-carriage is substantially the farthest off from the impression-cylinder, as shown, and a sheet that has just been printed is on that portion of the tapes between the rollers T and U. Now during the next half-revolution of the impression-cylinder the sheet first fed will be carried around to just engage the bed, and the carriage V will be moved half-way to the left, or to the position shown in Fig. 4, and the sheet on the tapes partially delivered, as shown. Now during the next half-revolution of the impression-cylinder I the sheet will be printed and the head of the same will be carried up to the position shown'in Fig. 5, and at this point the grippers N will open and the stripper-fingers will drop to take the sheet from the cylinder, and also during this halfrevolution of the cylinder the tape-carriage V will finish its movement to the left and entirely deliver the leading sheet, as indicated in said Fig. 5. Now during the next halfrevolution of the impression-cylinder the sheet just taken from the impression-cylinder will be carried by the tapes onto that portion of the same between the rollers R and S, or until the parts assume the position shown in Fig. 6, and now during the last half-revolution of the impression-cylinder to complete the cycle the tape-carriage will be moved back to the position shown in Fig. 3 and the sheet will run over roller S and will pass onto that portion of the tapes between the rollers T and U or to the position shown in Fig. .The stripper-fingers 9 thus operate to properly direct the sheets from the impression-cylinder onto the tapes. It will be seen as the sheet passes from the portion of the tapes'between the rollers S and R onto that portion of the tapes between the rollers T and U and the tape-carriage moves to the right that the motion of the tapes between rollers T and U is about the same as that between the rollers R and S, whereby the sheet will easily turn down over roller S onto the tapes. Now when the sheet is entirely on that portion of the tapes between the rollers T and U the carriage starts. on its movementto the left. This movement, as

before described, is substantially one-half the speed of that at which the tapes are moving.

Hence as the tapes are looped around the roller T the top'portion of the tapes between the rollers T and U will remain stationary, because all the incoming tape ortape coming over roller S will be retarded or taken up by roller T, and hence the sheet being delivered will remain substantially stationary, the top portion of the tapes under the same also remaining stationary and simply peeling or stripping away from under the forward end of the sheet. This action will take place by reason of the fact that the carriage will substantially reciprocate at a uniform speed, the tapes as the sheet is passed onto the deliverytable only giving to the sheet a slight throw before commencing this delivery action and just at the completion of the same, as before described. This constitutes a very accurate and nice delivery mechanism, because the sheet comes to a gradual standstill and is allowed to drop on the table by simply drawing the tapes from under the sheet, the top portion of the part of the tapes supporting the sheet during this operation, by reason of the loop before described, substantially standing stationary under the sheet. The parts are so timed that While the carriage is on its backward travel the speed of the same is such as to substantially compensate for the forward movement of the tapes, so that the portion of the tapes extending from roller T to rollerU will remain substantially stationary and the delivery action will be accomplished by withdrawing the tapes from under the sheet While the same is substantiallystationary. This is a new and greatly-improved mechanism over any with which I am familiar.

Thus it will be seen that I have invented a device by which the sheet is taken from the impression-cylinder without the use of grippers, in full sight of the pressman, with the printed side up and without contact of the printed sidewith any of the parts.

The device herein shown and described may be greatly varied by a skilled mechanic without departing from the scope of my invention as expressed in the claims.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a sheet-delivery mechanism, the combination of a set of driven tapes, two stationary tape-pulleys mounted in the frame, two looping tape-pulleys, the tapes running for ward from the first stationary pulley to the second stationary pulley, then backward J two portions of the tapes are uppermost for controlling the sheet, the speed of which sec- 'ond section will be controlled by the movement of the looping-rollers, and means for moving the looping-rollers so that the sheet While being delivered will remain substantially stationary, and the tapes will be withdrawn from under the same, substantially as described.

2. A sheet-delivery mechanism consisting of a set of driven tapes onto which the sheet .passes, two stationary rollers, two loopingrollers around which the tapes run, the top portion of the tapes running from the first stationary roller to the second stationary' roller, and from the second stationary roller around the looping-rollers, and the under part of the tapes running from the last loopingroller back to the first stationary roller, and means for reciprocating the looping-rollers at substantially one-half the speed of the tapes, substantially as described.

3. A sheet-delivery mechanism comprising a set of driven tapes onto which the sheet passes, stationary rollers, two looping-rollers for the tapes arranged so that the loop in the tapes lies under the last stationary roller, and means for reciprocating the looping-rollers at substantially one-half the speed of the tapes, substantially as described.

4. The combination in a delivery mechanism of theimpression-cylinder, the set-of traveling tapes,means for driving the same,means for guiding the sheet from the impressioncylinder ontothe tapes, two stationary rollers, a carriage carrying two looping-rollers, the tapes passing around the two stationary rollers and then around the two looping-rollers and back fromthe last looping-roller to the first stationary roller, and means for reciprocating said carriage at substantially onehalf the speed of the tapes, substantially as described.

5. The combination in a delivery mechanism of the impression-cylinder, the set of traveling tapes, means for driving the same,means for directing the sheets from the impressioncylinder onto the tapes, the stationary rollers R and S, the carriage V carrying the rollers T and U, means for reciprocating the carriage, the roller T being between the roller S and the impression-cylinder, the tapes pass-- ing around rollers R, S, T and U, and the guiding or directing fingers M placed over the roller S adapted to guide the sheet down onto the portion of the tapes between the rollers T and U, substantially as described.

6. The combination in a delivery mechanism of the impression-cylinder, the set of trav eling tapes, the stationary rollers, and the tape carriage carrying the moving rollers ing movement to said carriage, substantially IO as described.

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

H. A. WISE WOOD. Witnesses LoUIs W. SOUTI-IGATE, JOHN J. MURRAY.

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