US650672A - Paper-feeding machine. - Google Patents

Description

Patented May 29, |900.

T c. DEXTER. PAPER FEEDING MACHINE.

(Application filed June 25, 1898.)

3- Sheets-Sheet l.

(No Model.)

ATTORNEY S No. 650,672. Patented May 29, |900.

T. C. DEXTER.

' PAPER FEEmNGlmAcHmE.

(Appliation Bled June 25, 1898.)

(No Model.) 3 Sheets-Sheet 2.

INvx-:Non .238 fi H'- 229 m 4L BY No. 650,672. Patented May 29, |900. T. C. DEXTER.

PAPER FEEDING MACHINE.

(Application led June 25A ]89S.\

(No Model.) 3 Sheets-Sheet 3.

WITN ESSlES/:\

INVENTOR `Nrrnn STATES Farrar rarer.

fA'Lno'r c. DEXTER, or PEARL RIVER, NEW YORK.

sAPER-FEEDING MACHINE.

SPECIFICATION' forming' part 0f Letters Patent N. 650,672, dated May 29, 190.0'.

v Application filed .lune 25, 1898. Serial No. 684,471. (No model.)

T0 cz/ZZ wwm i may concern;

Be it known that I, TAL-BOT C. DEXTER, a citizen of the United States, residing at Pearl River, in the county of Rockland and State of New York, have invented certain new and useful Improvements in Paper-Feeding Machines, of which the following is a specification.

In paper-feeding machines, folding-machines, rulingmachines, printingpresses, and other machines designed to operate upon sheets of paper,as now commonly constructed, there is a great waste of paper d ue to the inaccurate feeding of the sheets through or from the machines. Steps have heretofore been taken to avoid part of this waste by providing automatic throw-out mechanisms which will arrest the operation of the machines in case two or more sheets are fed forward at the same time, and these throw-out mechanisms have accomplished the object aimed at, although it is obvious that the use and dependence upon such mechanisms are Very objectionable on account of the great loss of time resulting from the continual arrest of the operation of the machines. This loss of time has, in fact, proven such a great drawback in some cases that machines which were considered to be otherwise practicable havel been thrown out of the works of large printing andpublishingestablishments. The greatest waste of paper in paper-feeding machinery is, however, caused by the occasional failure of the sheet-advancing means to carry the sheets forward evenly and squarely. This is particularly the case with machines having intermittently-operating feeding-in or delivery mechanism, such as drop-roller mechanism. In such machines it is absolutely necessary to the proper operation that the sheet be presented squarely to the drop-roller mechanism in order that the sheet will be securely gripped by the feed-rollers at both sides of its forward edge. In operating upon certain kinds of very slippery paper the feeding instruments will sometimes slip 01 slide unequally upon the surface of the sheet,either failing to move the sheet far enough forward to be grasped by the drop-roller mechanism cr moving itV forward unevenly, so that only one side of the sheet will bey grasped, and in almost ups, as just described.

every instance where the' drop-rollers 'engage the sheet at one side only the uneven sheet will be destroyed and the several succeeding sheets will cause a choke-up and will also be destroyed. The choke-up will likely occur before the operator detects the error, as he Ais usually in charge of several machines and may be some little distance away from the faulty machine at the time. Under these circumstances the machine continues to advance the sheets until it is thrown out of operation by hand, the usual automatic throw-out being operated only by the passage of more than one sheet and of no utility in guarding against the inaccuracies in feed and consequent choke- I propose by my improvements covered by the present application to avoid the necessity of continually stopping the operation of the machines through which the sheets of paper are passed and at the same time to save approximately ninety per cent. of the waste of lnaterial due to inaccuracies in feeding', as aboveexplained. To accomplish this result, I insure the accurate register and squaring of the forward edge of the sheet passing from the paper-feeding machine or to or from any other machine which is to operate upon the sheets by so constructing and arranging automatic sheet-actuated tripping mechanism that when the sheet is not properly squared at its forward edge the feeding mechanism, which is designed to move the sheet, will be automatically held out of operation, and when the sheet is properly presented the feeding mechanism will be allowed to operate. V

The preferred application of my invention is that shown in the accompanying drawings, in which it is applied to automatically control .the operation of intermittently-operating drop roller mechanism. The drop roller mechanism may constitute the delivery mechanism of a paper-feeding machine or it may constitute the feeding-in mechanism of a paper-folding machine,rulingmachine, print- IOO paper-ruling machines, printing-presses, or other machines designed to operate upon suecessive sheets fed to them.

I have shown several modifications of my invention, differing mainly in details of construction, all of which modifications show applications of the invention to drop-roller feeding mechanism; but it will be clear from the description of my invention that other forms of .intermittently-operating sheet-feedin g devices may be placed under the control of the automatic sheet actuated tripping devices without departing from the scope of my inveution.

Referring to the accompanying drawings, which form a part of this specification, Figure 1 is a longitudinal vertical sectional elevation of a paper-feeding machine having my improvements applied thereto. Fig. 2 is a detail View illustrating the drop-roller-operating mechanism. Fig. 3 is a detail longitudinal sectional view of part of the machine, showing a modified form of my invention. Figs. 4 and 5 are similar views showing further modieations. Fig. 6 is a diagrammatic view illustrating the transverse arrangement of the parts of my improved machine.

The machine-frame may be of any suitable construction to properly support the mechanisms hereinafter described. I have shown only parts of the frame in the accompanying drawings, of which parts 1 represents one of the side frames; 2, afront cross-baror frame; 3, a cross-rod 5 4 and 5, brackets; 6, the transversely-extending air-pipe rigidly secured in the side frames, and 7 one of a pair of brackets rigidly clamped upon and supported by the air-pipe. The brackets 7 are adjustable upon the air-pipe G transversely of the machine and support the feeder-carriages and operating mechanisms, as hereinafter set forth.

Adjustably mounted upon rod 3 are the paper-supporting arms 8 of usual construction.

9 is 011e of a series of lower delivery-rollers keyed upon a constantly-rotating shaft 10, journaled in suitable bearings in the machine and driven by any suitable means. (Not shown.)

11 is a transverse]y-extending rock-shaft supporting rock-arms 12, in the free ends of which is journaled a transverse shaft 13, carrying drop-rollers 14. The parts 12, 13, and 14 are shown in Fig. 1 by dotted lines. The drop-rollers 14 operate in conjunction with lower rollers 9 for delivering the sheets from the machine. The lower rollers 9 are constantly driven by suitable gearing with the main shaft of the machine, and the drop-rollers 14 are intermittently lowered and elevated into and out of peripheral contact with the rollers 9 in a manner well understood, so that the forward edges of the sheets will be gripped between the upper and lower rollers and fed rapidly from the machine. The upper rollers are rotated by their engagement with the lower rollers or the sheet supported upon the lower rollers.

15 represents an adjustably-supported pile of sheets,x being the normal working height of the top of the pile. The supporting-table for the pile (not shown) maybe of any known construction provided with automatic elevating mechanism for retaining the top of the pile at the proper level.

23 represents the lower rubber retardingblocks constituting the lower members of the sheet-separators. Theselowerseparator members have their working faces in a plane slightly higher than the normal working plane of the top of the pile of sheets.

25 represents one of a series of milled or knurled wheels or rollers keyed to a constan tly-driven shaft 2G and supported thereby at the forward edge of the pile of sheets. The peripheries of the milled or knurled wheels or rollers are a little to the rear of the rear edge of the lower separator members and serve to elevate the forward edges of the sheets as they are pushed forward by the fcedingoff devices to cause the sheets to pass to the separator pads or beds.

27 represents small air-jet pipes at the rear edges of the separator-beds and preventing the forward edges of the sheets bein g jammed against the separator-beds. The jet-pipes 27 are connected with the main air-pipe G through a suitable rubber hose, such as 28. The connection is not shown. The air from jet-pipes 27 keeps the forward edge of the sheets pressed firmly up against the under surfaces of the upper separating members as the sheets are fed forward by the feeding-off devices.

30 is the main operating-shaft of the machine, jourualed in suitable bearings in the side frames and extending transversely across the machine above the feeding and separating devices. Each of the brackets 7, which are adjustably mounted upon the air-pipe 6, has formed integral with it an upwardly-extending guide-frame 31, through which the shaft 30 extends. One face of the guideframe 31 is formed with a vertical channel in which is supported the vertically-reciprocating slide-bar 35, formed with an elongated slot through which the shaft 30 passes.

38 is an antifriction-roller journaled upon the slide 35 and confined by a washer 39 and set-screw 40.

41 is a cam secured to the shaft 30 by setscrew 42. The cam 41 is located in close proximity to the face of the slide 35 and is in constant engagement with the antifrietionroller 38 for the purpose of raising and lowering the slide 35.

45 is a horizontal track-bar secured to the lower end of the vertically-reciprocatin g slide 35. The horizontal track-bar 45 is of dovetailed cross-section and is formed in one face with a channel 47, in which fits a longitudinally-adj ustable bracket 48, secured by means of a set-screw or bolt 49, passing through a longitudinal slot 50 of the bracket and thread- TOO IIO

ed into a suitable opening in the track-bar. The bracket 48 supports the pawl of the automatic tripping device heretofore described.

55 is one of a pair of longitudinally-reciprocating and vertically-movable feeder-carriages mounted to reciprocate upon the horizontal track-bar 45. The lower edge of the carriage is formed with a horizontal plate or ange 60, to which is secured backing-plate 63 of the oblong rubber block or pad 62.

65 is a bracket-arm secured to and extending rearwardly from the carriage 55. The bracket-arm 65 is formed at its forward end with a vertical slot 65, through which passes a tap-bolt 66, which is seated in a suitable threaded opening in one face of the carriage 55. By reason of the said bolt 66 and slot 65a it will be observed that the bracket-arm 65 (carrying the feeding-off instruments) may be vertically adjusted with relation to the feeder-carriage and separator carried thereby, the bracket-arm 65 forming practically a continuation of the carriage.

70 and 71 are the feeding-off instruments or fingers, each of which carries in its forward bifurcated end a rigidly-clamped block or roll of rubber 72 and is formed with a journalsleeve 73, journaled upon a bolt 74, which projects from one face of the bracket-arm 65. Extending rearwardly from each of the journal-sleeves 7 3 is a heel 75, which is normally enga ed b an adjusting-screw 76 assinfY b C 7 p D through a flange 77, formed integral with the bracket-arm 65. Each of the feeding-off instruments or lingers is provided with a suitable spring to give it a yielding pressure against the pile of paper.

Keyed to the outer end of the main rotating-shaft 30 is a crank-arm 85, carrying at its free end an antifriction-roller S6, which engages in an elongated slot 87 of the slotted rock-arm 8S. The rock-arm 88 is journaled outside one of the side frames of the machine upon a journal 89.

90 is a rock-shaft journaled in suitable bearings in the side frames of the machine and extending across the machine.

91 is a rock-arm keyed to the shaft 90, and 92 is a link journaled at one end to the rock-arm 91 and at its other end to the rockarm 88. Depending from and keyed to the rock-shaft 90 is a long carriage-operating 4rock-arm 95, having journaled to its lower end an arm 96, formed with a heel 97, engaged by the spiral spring 9S, which is connected at its other end to a pin 99, projecting from one face of rock-arm 95. The spring 9S keeps the forward end of the pivoted arm 96 pressed downwardly into engagement with a notch or recess 100, formed in the 'upper edge of the carriage 55. The roll 101 is journaled freely upon a pin 102, mounted in the forward end of the spring-actuated operating-arm 9G, the spring 98 holding the roll 101 normally in engagement with the notch 100.

105 is a rack-bar formed with elongated slots 106, through which pass screws 107 for vconning the rack-bar in position upon one face of the carriage 55.

108 represents blocks or flanges formed integral with one face of the carriage 55 for assisting in supporting the rack-bar 105. The rack-bar 105 is adapted to move longitudinally upon the carriage within certain limits for the purpose presently to be explained. The upper serrated or toothed edge of the rackbar 105 is approximately on a level with the upper edge of the carriage 55. The rear end of the rack-bar is formed with an incline or cam 105e, which rests normally just below the antifriction-roll 101 of the operating-arm 96. The rack-bar forms one of the essential elements of the automatic tripping devices which control the feeding operation of the carriage.

The longitudinally-adjustable bracket 48, mounted upon track-bar 45, has an upwardlyextending arm 48", upon which a pawl 11S is j ournaled and supported j ust above the rackbar 105, with which it is adapted to engage.

48a is a bracket-arm secured to the bracket 7 by bolt 7, and 115 is a tripping-finger journaled in the lower end of the arm 48a and rhaving its free or forward end resting normally in the longitudinal slot 116, formed in the metal bed of the lower separator member. The tripping-finger 115 is formed with a heel 115, to which is pivoted the lower end of the upwardly-projecting rod 117. an upwardly-projecting shoulder of the tripping-nger 115, which is supported normally in position to engage the forward end of a rock-arm 12, keyed to the rook-shaft 11 and projecting rearwardlytherefrom. When the tripping-finger 115 is in normal position with the shoulder 115b in engagement with arm 12, it will be observed that the drop-rollers 14 will be held in elevated position. The pawl 118 has projecting from one side an ear 118, through which the .rod 117 extends. 117a is a collar adjustably secured to the rod 117 below the ear 118. From this construction it will be observed that when the tripping-finger 115 is in its lowest position in the groove 116 the heel`l15 will hold the rod 117 in its uppermost position, and the collar 117, engaging the ear 11S, will hold the pawl 11S disengaged from the rack-bar 105. Should the tripping-linger 115 be elevated from its groove by the passage of a sheet, it will be clear that the support for the pawl 11S will be removed, and the pawl will drop into engagement with the rack-bar.

119 is a finger projecting from bracketarm 48 in position to engage shoulder 115b and limit the downward movement of tripfinger 115 in its groove 11G.

. At one end of the rock-shaft 1l is keyed a rock-arm 125, to the rear end of which is jour-v naled a vertical pitman 126, formed with a vertical slot 127, through which the main shaft 30 passes. e

128 is the drop-roller-operating cam, keyed to the shaft 30, and 129 is an antifrictionroller journaled upon the upper end of the 115"A isv IOO IIO

pitman 126 and working upon the periphery of the cam 128. By the rotation of cam 128 the drop-rollers 14 are intermittentlylowered into peripheral engagement with the lower feeding-rollers 9 to grasp a sheet between them and feed it rapidly from the machine.

I have only described one set of sheet feeding and separating devices and one sheet-actuated tripping device arranged in the same longitudinal plane; but it will be clear by reference to Fig. G of the drawings that I propose to employ two sets of these devices arranged transversely of the machine. Both sets of such devices are of the same construction. It will of course be clear that two rock-arms 95, which operate arms 9G, must be provided, one for each feeder-carriage, and two slides 35, carrying track-bars 45, with their operating rotary cams upon thc main shaft 30. The other mechanisms described, with the exception of the rock-arm 88 and crank 8G, are also duplicated, said rock-arm 88 serving to impart the rocking motion to shaft 90 for the operation of both carriages.

Referring to Figs. 1 and 6,-it will be observed that the feeding instruments 71 will move the successive sheets forward from the pile into engagement with the sh eet-separators,',which carry the sheets forward to the bite of the delivery drop-rollers. If the sheet is fed forward with its front edge extending squarely across the machine, both of the tripping-ngers 115 will be simultaneously tripped to move the shoulders 115b out of engagement with the arms 12n and also to lower the two pawls 118 into engagement with the rack-bars 105 to disengage the operatingarms 96 from the carriages 55, and thereby arrest the feeding operation. The drop-rollers 14 will then be allowed to descend upon the sheet and feed it rapidly from the machine. If the feeding devices should slip unequally upon the sheet being fed, the front edge of one side will reach the trippiug-nger before the front edge of the other side of the sheet. The result of this will be that the one tripping-linger will be actuated for arresting the operation of the feeding devices in Arear of it, while the other feeding devices will continue to operate, and should said other feeding devices fail to properly square the sheet by the time the cam 128 reaches position to drop the drop-rollers 14 it will be clear that the shoulder 115" of the tripping-linger at that side of the machine will prevent the falling of the drop-rollers. The sheet will remain in this position until the carriages move back and start forward on another stroke, when the tripping finger, which has already been tripped, will remain in tripped position, and the opposite side of the sheet will be moved forward until the sheet is squared and the second tripping-finger is tripped.

As explained above, the drop-roller delivery mechanism is allowed to engage the sheet and feed it from the machine, only when both of the controlling tripping devices are in tripped position.

The feeding-machine, comprising the feedin g-off lingers and separator controlled by the tripping devices7 which arrest the operation of the feeding and separating devices by disengaging the operating-arm from the carriage, is described and claimed in an application filed by me June 24, 1898, Serial No. 684,347, forimprovements in paper-feeding machines,- and I would have it understood that I do not claim in the present application any of the features above described which are illustrated in said pending case, except in combination with the automatic sheet-actuated tripping device controlling the delivery mechanism of the feeding-machine. The claims of my present application are confined to the automatic control of the delivery mechanism of the feeding-machine (or the feeding-in mechanism of the folding-machine, rulingmachine, printing-press, or other machine) in various combinations.

As explained in my above-named pending application, the feeding-off fingers and separating members move forward and back and are elevated and lowered simultaneously because they are mounted on the same carriage, and at the same time said feeding and separating instruments engage the sheet alternately or successively. In said above-named application the tripping-finger 115 and controlling-paw] 118 are journaled upon arms of the same adjustable bracket in order that they will be elevated and lowered with the track-bar which supports the carriage. In the present application I have shown the tripping-fingerll supported from a bracket-arm which is mounted upon the bracket 7, while the pawl 118 is supported upon the adjustable bracket mounted upon the verticallymovable track-bar. By reason of this arrangement it will be observed that the tripping-finger 115 is always in position in the path of the sheets, while the pawl 118 is elevated and lowered with the carriage. To allow for this relative movement between thc pawl and tripping-finger, I form the`rod 117 of sufficient length to prevent the ear 118 being raised off the end. The movement between the ear 118UL and rod 117 is in a vertical direction, as neither bracket 48 nor 48b moves longitudinally of the machine.

In Fig. 3 I have shown a modified arrangement of my improved automatically-controlled delivery drop-roller mechanism. In this form of device I control the operation of the drop-roller mechanism by electrical means. The drop-roller mechanism being the same as above described is referred to by the same reference-numerals as in Figs. 1 and 2. rlhe vertical link or pitman 126, which is connected with the rock-arm 125 for raising and lowering the drop-rollers, is formed upon one face with a notch 200, in which a dog or pawl 201 is adapted to engage. The pawl or dog IOO IIO

201 is journaled at 202 upon a bracket-arm 203 and is provided with a spiral spring 204 for holding it normally disengaged from the notch 200. upon bracket 206, which is adapted to be secured to the side frame of the machine adjaf cent to the pitman 126 in such position as to allow for the free movement of the pitman. 207 is an armature projecting from the hub of the dog 201 into position above the electromagnet 205 to be attracted thereby while said magnet is energized. Supported in the path of the sheets is au electric contact device ccmp rising the curved sheet-actuated arm 210, secured to a contact-arm 211, which dips in a small metal cup of mercury 212. The cup 212 is electrically connected through Wire 213 with one pole of the battery 215, while the arm 211 is electrically connected with one pole of the electromagnet 205, the other pole of the electromagnet being electrically connected with the opposite pole of the battery 215. 216 and 217 are respectively the circuit-wires extending from contact-arm 211 to magnet 205 and from magnet 205 to battery 215.

It will of course be understood that two such structures as shown in Fig. 3 must be employed, the tripping devices being arranged transversely across the machine in the path of the sheets. The electrically controlled pawls or dogs 201 may be duplicated to operate upon the same pitman 126, as the drop-roller mechanism is controlled by a single pitman at one side of the machine.

It will be observed that the drop-roller-delivery mechanism will be automatically controlled and held out of operation when the sheet is unevenly or inaccurately fed forward by the feeding devices the same as in the form illustrated in Fig. 1. In this connection I would state that the electric tripping-linger illustrated in Fig. 3, as j ust described, is covered by Patent No. 595,7 68, granted to myselfl and Clarence Ransom May 28, 1897.

-In Fig. 4 I have shown a further modification differing from the forms already described in the following particulars: The rock-arms 12, which support the drop-rollers 14, are formed with downwardly-projecting lugs or heels 225, which end a little short of the peripheries of the drop-rollers 14. Journaled upon pins 226 beneath .the plane of sheets is au arm or trigger 227, having a heel 227, which is connected by a spring 228 with the pin 229, secured to the bracket 4. The arm or trigger 227 is held normal by the spring 228 into engagement with the lug 230, projecting from the bracket 4, and in this position said arm 227 will project vertically into the path of the sheets in position to engage the lug or heel 225 of the drop-roller mechanism. Two of such spring-retained triggers 227 being arranged transversely of the machine, it will be observed that the drop-roller mechanism cannot drop into operative position when either of the triggers 227is in normal position. Vhen the sheet passes forward under the ac- 205 is an electromagnet supportedtion of any suitable feeding mechanism, the triggers 227 are pressed forward and downwardly against the tendency of their springs 228, as indicated by dotted lines, and when in this position the drop-roller delivery mechanism is allowed to operate for delivering the sheet from the machine. In the form shown in Fig. 4 I have illustrated sheet-feeding belts 235 for carrying the sheets to the drop-roller mechanism. This is merely to show a different form of feeding mechanism to indicate the general applicability of my invention to control sheet-feeding mechanism of any description. For instance, the drop-roller mechanism may be employed at the entry end of the folding-machine, ruling-machine, printingpress, or other similar machine in place of being put at the delivery end of the feedingmachine, the principle being the same whatever the application.

In Fig. 5 I show a further modification in which the rock-arms 12, supporting the droprollers 14, have journaled to bracket extensions 240 the downwardly-projecting arms 241. The arms 241 are journaled at 242 and are connected by spring 243 with the bracketarm 240. The arms 241 project downwardly into the longitudinal groove'll at the side of the separator-bed, as shown in full lines. When in normal position it will be observed. that the arms 241 will engage the bottom of grooves 216 and prevent the drop-rollers being lowered into operative position. When the sheet is fed forward with its front edge eX- tending squarely across the machine, it will be observed that the arms 241 will be pressed forwardly into the position shown in dotted lines, when the drop-rollers will be allowed to drop into peripheral engagement with the sheet upon the lower rollers 9 and feed the sheet out of the machine.

The importance of my invention will be clear'from the explanation of the faults of previous machines given in the first part of my specification.

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

1. In a paper-feeding machine, the combination of a support for a pile of sheets, a suitable sheet-feeding instrument, suitable intermittently-operating delivery mechanism, and a sheet-actuated tripping device arranged to normally prevent the operation of the delivery mechanism, and adapted, when. tripped by a sheet, to arrest the operation of the sheet-feeding instrument and allow the operation of the delivery mechanism,` substantially as set forth.

2. In a paper-feeding machine,- tle combination of a support for a pile of sheets, a

suitable sheet-feeding instrument, suitable intermittently operating delivery mechanism, suitable sheet-separating devices, and a sheet-actuated tripping device arranged to normally prevent the operation of the delivery mechanism, and adapted, when tripped IIO bya sheet, to arrest the operation of the sheetfeeding instruments and allow the operation of the delivery mechanism, substantially as set forth.

3. In a paper-feeding machine, the combination of a support for a pile of sheets, a suitable sheet-feeding instrument, suitable intermittently-operating delivery mechanism, suitable sheet-separating devices at the delivery end of the machine, and a sheet-actuated tripping device arranged to normally prevent the operation of the delivery meehanism, and adapted, when tripped by a sheet, to arrest the operation of the sheet-feeding instrument and sheet-separating devices and allow the operation of the delivery mechanism, substantially as set forth.

4. In a paper-feeding machine, the conibinatiou of a support for a pile of sheets, suitable sheet-feeding mechanism, suitable droproller mechanism, and a sheet-actuated tripping device arranged to normally prevent the opelation of the drop-roller mechanism, and adapted, when tripped by a sheet, to arrest the operation of the shcet-feedin g mechanism and allow the operation of the drop-roller mechanism upon the sheet, substantially as Set forth.

5. In a paper-feeding machine, the combination of a support for a pile of sheets, suitable sheet-feeding mechanism, a sheet-actuated tripping device adapted to arrest the operation of the sheet-feeding mechanism, suitable intermittently operating drop roller mechanism, and means of engagement between the tripping device and drop-roller mechanism, whereby the d rop-roller mechanism will be normally held out of operation and will be allowed to operate when the tripping device operates to arrest the feeding device, substantially as set forth.

6. In a paper-feeding machine, the combination of a support for the pile of sheets, a feedercarriage supporting suitable sheetfeeding instruments, a rack-bar movably mounted upon the carriage and adapted to arrest the feeding operation of the feeding instruments, a pawl supported above the rackbar, a sheet-actuated tripping device supported in the path of the sheets and operatively connected with said pawl,suitable d roproller delivery mechanism, and means of engagement between the tripping device and drop-roller delivery mechanism,substantially as and for the purpose set forth.

TALBOT C. DEXTER.

lVitncsses:

M. V. BIDGooD, WM. E. KNIGHT.

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