US1022776A - Paper-feeding machine. - Google Patents

Description

lE. o. DEXEEE E E. E. JONES.

APER PEEDING MACHINE.

APPLICATION FILED 06T. 2B, 1910.

Patented Apr. 9,111,912.

.wwwa-wao:

T. G. DEXTER & R. E. JONES.

' PAPER FEEDING MGHINE. APPLIQATION rILBn/oomwza, 1910.

1 ,022,776.' Patented Apr. 9, 1912.

4 SHEETS-SHEET 4.-

unimi) surmise PATENT onirica.

TALBOT c. 'DEXTER AND Bierman ii. JONES, or PEARL aivna, iviiw YORK, .assieivons TO DEXTER FOLDER COMPANY, 0F PEARL RIVER, NEW'YORK, A CORPQRATlON OF NEW YORK.

PAPER-FEEDING MACHINE.

Specification of Letters Patent.

.ilpplcatioaled 0ctober`28, 1910. Serial No. 589,543.

Patent-euhm?. 9, 1912.

To allv whom t am@ concern Be it known that We, TALBOT` C. DEXTER and RICHARD E. JONES, hoth citizens'ofthe United States, and residents of Pearl River,

county .of Rockland, State ofv New York, have invented certain nevi7 and'usefullni- 'proveinents iig Paper-Feeding Machines, of which the following is a specification.

The present invention relates to improvements in thev type of pile feeding machines in W iich there are main and auxiliary pile elevating mechanisms arranged to act independentlyV for supporting and elevating piles of sheets for the purpose ot providing means for building up a ile upon one table or platform While theg eeding machine is opeiating` upon a pile supported by another table or platform. Several forms of this type of machine have been developed, in

some of which there is an independentstationary supfport for a table Aor, platform at the base o the machine upon 'which' the sheets may be piled While the machine is operating, While in others the arrangement is such that the sheets are piled upon a table or platform resting upon the" elevating frame of one of the elevating mechanisms, While the machine is operating upon. the pile under the, control oi' the other elevating mechanism. j

The present improvements are applicable to either` of these forms ofthis type of niachine, although we have obtained the most satisfactory results and greater simplicity in applying our improvements to the forni ,of machine in which the pile is loaded upon Aa table or platform supported by one elevating mechanism While the machine iis operating upon a pile sustained by the other elevating mechanism.

In the development of our improved ,man

chine, we have so modified the old and wel] known construction .of pile feeding niachines that the machine may be operated either upon the old plan as a single table machine or upon the 'new plan as a double table machine. Vile retainin our improved machine, the main pile elevator. of the old and well 'knoivn construction comprising ltwo vertically arranged elevating screws operated by automatically controlled `mech` anisnn'and a vertically traveling girder frame threaded upon ,said screws Iand arranged to supporta` sectional table or-platiiorin'j'upon which? the pile ot sheets visumranged. iThis main elevating mechanism has been effectively modiiied to have combined with it an auxiliary pile elevating mechanism which is actuated by the saine general operating mechanism controlled by suitable devices which enable the operator to operate the main and auxiliary elevating mechanisms independently of each other or simultaneously. The operation of both the main and auxiliary elevating mechanisms is under the automatic control of the pile g'overnor Whether the s'aid mechanisms are operating independentlyT oi' together. i

In the specific embodiment olfour invens tion disclosed in the present application, we have reduced the diameter' of the upper-ends of the main elevating screws and have freelyy journaled upon these reduced ends' auxiliary feed screws in the .torm of threaded sleeves. The upper ends of these auxiliary feed screws or sleeves are suitably geared to an auxiliary pavvl and ratchet driving mechanism, the oscillating` pavvl oi' `which isl actuated from the same mechanism which actuates the oscillating paivl of the main elevating screws. Independent auxiliary traveling yoltes are suitably mounted in .the-machine frame alcove the traveling frame oi" the main elevating mechanism and these auxiliary yokes are threaded upon the auxiliary elevating screivs or sleeves. Suitable hangers are carried by said yokes and means are provided for engaging said hangers with a pile'supporting table or platform.

An automatic pile governor controls the operation of the elevating mechanisms to suit the variations in the height of the pile ,of `sheets being operated upon.

rl`he oscillating pawl of the main elevating mechanism is arranged to be automatically thrown into and out of action hy a manually operated reversing mechanism by which the main pile elevator may he run up or down by power. The actuating pawl for the auX- iliary elevating mechanism is manually thrown into and out of action.` VVith this arrangement, it will be understood that the machine can be operated under the old plan by using only the main pile elevatingmech- 4 anisin, or upon the new plan by usingboth elevating mechanisms. It Will tui-ther he understood that in starting worlr with.

lthe feeding machine under the* dduble table plan of feed, ,the initial pile isv supported, upon thenmain elevating plate or platform of the initial pile being at the the purpose of providing a vertical guide 4up a new pile of sheets upon a second table rings, and afterward point out the novelty more particularly in the annexed claims.

I tion of a paper feeding machine embodying bar or girder 3. ,'lhese main frame parts form, the auxiliary elevating mechanisml being thrown out of operation.` Thefy -nlahine will operate under the automatic control of the pile governor until the Q main elevating platform has reached an elevation within the range of the auxiliary elevating mechanism. At this point in the operation, without arresting the feeding op eration of the machine, the auxiliary pile elevating mechanism'is placed in operation by engaging the hangers withthe pile supporting platform and throwing the'aux-A iliary oscillating pawl into engagement with its ratchet. The power mechanism is then thrown into gear with the main elevating mechanism and the main .pile supporting platform is rapidly lowered to the bottom of the machine, the remainder of the initial pile being in the meantime automatically elevated by the auxiliary mechanism, while the feeding machine continues to operate. 1While the machine is feeding ofi' thel latter part ofthe initial pile, the operator builds or platform which is put in position on the main elevating frame at the base of the machine. When the entirev pile is completely exhausted, the second pile is quickly elevated by power to the proper height for the operation of the feeding devices, the table same time removed from the hangers of the auxiliaryv elevating mechanism to make way fm the second pile of sheets.

.n order that our invention may be fully understood, we will first describe the same with reference to the accompanying draw- In said drawings Figure lv is a side elevaour improyements. Fig. 2 is aV vertical transverse sectional elevation of the Fig. 3 is a plan view of the same. Fig. 4 is a detail side elevation of the reversible gearing for the power operation of the main pile elevator, and Fig. 5 is an enlarged detail vertical sectional view of parts of the main and auxiliary elevating mechanisms.

Paper `feeding machines of the type to which our present improvements apply are usually constructed with heavy frames such as illustrated in"the accompanying drawings, in which the main frame consists of the upright side frames 1, the transverse top bar or girder 2, and the transverse bottom are properly secured together and braced by the usual tie bolts in the manner well understood in 'this art. vThe machine is provided at the front with a series of vertical bars or slats 11 indicated in dotted lines in Fig. 1 for for the front edge of the pile of sheets.

Each of the side frames 1 is formed with a main channeled upright standard 5 in which are located the main and auxiliary elevating screws and 'in which travel the threaded boxes of the main and auxiliary elevating frames. The main elevating screws are shown at G journaled at their lower ends in suit-able bearings 7 supported upon t-he bottom girder 3 and adjacent to their upper ends in bearings 8 suitably secured to the machine side frames. The extreme upper end of each main elevating screw (5 has keyed to it a bevel gear 9 meshing with a similar bevel gear 10 keyed to a ltransverse shaft 11 suitably journaled in the machine frame beneath the top girder frame or bar 2. This shaft ll'is driven in either direction by a motoi for the rapid raising andlowering of the pile supporting platforms, or is driven in a pile elevating direction by a pawl and ratchet mechanism operated from the cam shaft of the feeding machine for gradually elevating a pile to suitl the requirements of the feeding machine. These mechanisms for driving the shaft 11 will now be described.

The shaft 11 is extended at each side of the machine beyond'the vertical planes of the'elevating screws G. One end of shaft 11 has keyed to it a large gear 15 driven by' a reversible train of gear operating from a motor driven shaft. 16 is a motor driven shaft journaled in bearings 17 extending up from the top bar 2 and having at one end a gear 18 which is designed to mesh with and be driven `by the driving pinion of a motor which is mounted upon the top beam 2 of the machine frame. This motor is not shown in the accompanying drawings. vThe opposite end of the shaft 16 has keyed to it a pinion 2O which meshes with. and drives an intermediate gear 2l journaled upon astud carried by a .rocking controlling lever 22 which is `ournaled upon the extension' of the motor driven shaft 16k The gear 21 meshes with and drives a smaller gear 23 also journaled upon a stud carried by the controlling lever By shifting the lever 22 upon shaft 16 either the gear 21 or the gear 23 can be thrown into mesh with the large gear 15y upon shaft 11 -so that the 'shaft 11 will be rotated in either direction depending upon which .of the gears 21 and23 is thrown into operation. The controlling lever 22 has an arm 22 projecting from it to which is pivoted at 25 the upper end of a rod or link 2G pivoted at 27 to a hand lever 28 journaled upon one of the side frames of the machine at 29. r1`his hand lever 28 is formed with a slotted curved segment 30 through the slot of which v extends a hand screw 31 threaded into an lopening in the,

machine frame. By loosening the screw 31 it will be observed that the lever 28 caribe placed in either of, its extreme positions, or in its intermediate position and that it Tcan be clamped in either ofthese three positions by means of the screw 31. In one of the extreme positions, the intermediate gear 21 vwill be in 4mesh with gear 15 for driving matica'llyfcontrolled pawl and ratchet mechproer height for feed? anism to gradually elevate the pile of sheets and maintain the., top of .the pile at the fithe action of the sheet ing devices.

The opposite extension of the shaft 1 1 has keyed to 'it a -small ratchet wheel 35. Journaled upon the endl 'of shaft 114` adjacent to the ratchet wheel is a rockin arm or lever 36 to the upper end of which 1sv pivoted at 37 a awl 38-whichis adapted toen ge the ratc et wheel 35 and vrotate the sha t l1 `in a step by step mannen. The lower endof the rocking lever 36 carries -a laterally projecting stud 39 lwhich operatesin the elongated slot 40 of .a reciprocating pitman 41 pivoted upon'the crank pin V42 of the'disk cam 43 which iskeye'd'to the main cam shaft 45`ofthef aper; `feeding machine.

' The fee ingdevices of the machine are not shown, butin the Dextertype ofpaper feeding machine. to which the present improvements are illustrated as applied, al-lof the operative parts 'of the machine are i ,driven by this cam shaft v45.

It will be observed that the slot 40 the pitman 41 is formed atits inner end with an -upwardlygpifesented off-set or recess 40a in which the stud 39 engages at one end of the stroke; of the pitm'an, for the purpose of returning thepawl carrying lever 36 and pawl 3.8 after a feeding stroke, unlessl its return movement is prevented by the pile 4governor'which will now be explained.y

Pivotally connectcdfto the dowcr end of `the paWl-carrying lever 36 is a horizontalthe machine frame-for 1n its reciprocating movements.

link 50 formed with yan elongated slot 51 ,i0 intowhich projects `a pin'52extcnding from guiding the link 50 This link 50 is formed in its upper edge with a notch 5.3 which is adaptedto be engagedby a gravityretaining lpawl or dog 54;*after' a feeding stroke of the pawl 38. This: pawl or dog 54' is freelypivoted'upon a pin '55 projecting from the machine frame.I

is a rock sha-ft suitably journaled in the-machine frame and carrying a rock arm 61 formed.Witlfi'a` laterally projecting stud f 62 which ispresente'd beneath the retaining pawlforv dog v`54. l Therock shaft 60 also carries a rock arm '63 provided with antiwhich is j ournaled contactwith the cam 43, so that once iii each revolution of the cam shaft 45, the rock shaft 60 will be moved for vraising the retaining dog or pawl 54.

J ournaled in the lower end of a depending bracket -arm is a short rock shaft 71 carryingrock arm 72 in the free end of a pile gaging roller 73. This rock shaft 71 also carries an arin- 74 which is connected by a rod 75 with the short arm 76 projecting from the rock shaft 61 for controlling the movements of said rock shaft`61 from the varying elevation of the top of the pile of sheets.

From this construction of pile governor, it will be observed that in the normal operation of the machine, the rearward motion of pitman- 41 rocks lever 36 causing pawl 38 lto rotate shaft 11 forwardly one step. At the completion of this feeding stroke, the low part of. the controlling cam 43 is presented beneath the controlling arm 63 with the result that the pile gaging roller-7 3 will be 'dropped to `the top of the pile of sheets being operated upon. If the elevation of the top .of the pile is below normal, the gaging lever will drop low enough to permit, rock arm 61 to elevate the retaining dog or pawl 54 vout of the path of notch k53 so that the return movement of pitman 41 will return the lever36 vand pawl 38 for a new feeding stroke. If, however, at the moment of gaging the elevation of the pile of sheets, the elevation `is normal, the gaging roller 7 3 will not-'drop low enough to cause the elevation of the retaining dog or pawl 54, and as the pitman 41 starts its return stroke. the;

Lpawl or dog 54 will engage the notch 53 andretain the lever 36 and pawl 38 in their inactive positions, the return movement of the pitman 41 disengaging the' notch 40n from stud 39 land allowing the stud 39 to ride in the extension' slot 40. AThe lever 36 and pawl 38 are retained in their inactive positions until -suticientxsheets are. moved from the pile to lower the top below normal, each stroke of pitm'an 41 serving to automatically free the engagement of dog-or pawl 54 from thc notch of link 50 to vpermit the raising of the dog or pawl 54 from the path of the notch in the event of the top of the pile falling low enough to require another elevating stroke.

It will be observed particularly from Fig. 1 of the drawings, that the pawl 38 is formed with a curved controlling finger 38 beneath which engages a stud 8O carried by rock arm 81 secured to the end of a controlling shaft 82 which ext-ends from side to side ofthe machine and has upon "its opposite end the oppositely arranged roc-ker arms83 and 84, each of which is provided. withan anti-friction roller 85. Thelrpcking .lever 22carryjing the motor driven reversing gears is provided with two inwardly Y 'projecting lugs 80 and 8T, the former of which is presented in the path of the anti.- friction roller carried by rock arm 83, while the latter of which is presented in the pat-h of and on the opposite side of the roller carried by the rock arm S-t, so that when the gear carrying lever 22 is shifted into one extreme position to throw gear 21 into mesh with driven gear l5, the lug 87 will engage the anti-friction roller upon lrock arm 84 for rocking shaft 82 and causing the stud S0 to engage the arm .38 and raise the pawl 38 out of engagement with the ratchet wheel 35. When on the other hand, the gear-carrying lever 22 is shifted to its other extreme position for throwing gear 23 into mesh with driven gear 15, the lug 8G will engage the anti-friction roller of arm 83 for rocking shaftvSZ in the same direction with the same result. It is necessary to' maintain l the pawl 38 out of engagement with the ratchet wheel when the shaftll is driven by the motor for either rapidly raising or lowering the pile supporting platform. It will vbe observed with particular reference to Fig. 4 of' the drawings `that when the gear-carrying lever 22 is in its intermediate position, neither of the lugs S6 nor 8( will engage a rocker arm upon shaft 82, so that pawl 38 will naturally gravitate in `engagement with the ratchet wheel 35 and this intermediate position of the gear-carrying lever 22 must be maintained while the pile elevating mechanism is being operated by the automatically ,controlled pawl and ratchet devices.

The pile support of the main elevating mechanism is shown in the form of 'agirder frame comprising the end girders 90 and the connected side girders 91 formed into a stout rectangular supporting frame. The end Ygirders 90 have secured to them the nuts or boxes 92 which are threaded upon the main elevating screws (i and arranged to travel in the vertical channels of the stand ards 5 in the usual manner. The sectional platform boards are shown at 95 with the positioning cleats 9.0 to enable the `perator to quickly place the platform boards in po sition to receive a pile of sheets. P indi- Vcalles a pile of sheets upon the platform.

The upper ends of the main elevating screws (5 are turned down to a reduced diameter as shown particularly in Fig. 5 of the drawings, to receive the screw sleeves of the auxiliary feeding mechanism. auxiliary screw sleeves .are indicated at 100.

The sleeves 100 are of tubular form and vatingA `screws rand the auxiliary screw rhese extent between the ends of the screw sleeves so as to provide vertical bearings 102 for the sleeves at their ends and the reduced section 103 between the bearings.

Each screw sleeve 100 h'as secured to its upper end a pinion 105 which meshes with alarger gear 106 driven by a pinion 107 secured to a short vertical shaft 108 carrying at its upper end a bevel gear 109 meshing with a bevel gear 110 keyed to a transverse shaft 111. same manner toboth of the screw sleeves 100.

Keyed toan extended end of the shaft 111 is a ratchet wheel 112 and journaled upon the shaft 111 is a rocker arm 113 to which weighted throw-out handle 112". The rocker arm 113 may have a weighted portion as shown at`113a to assist 'the return action of the pawl-carrying arm. The rocker arm 113 has pivotally connected to it at 115 a link 116 which is pivotally connected with the lower end of the pawl-carrying lever 36 above described, so that the movements ofthe lever 36 are transferred to the rocker arm 113. l

Threaded upon the auxiliary screw sleeves 100 `arethe nuts or boxes 120 which are arranged to travel in the lupper portions of the channels of standards 5. These nuts or lugs 125 in which are adjustably mounted stout steel rods 126 held in the desired adjusted position by set screws 12'? passing through the walls of the lugs 125 and engaging the rods 126. Each of the rods or bars126 is provided with two depending hanger arms 130. 'These hanger arms 130 are adjustably mounted adjacent to the opposite ends 'of the rods or bars .126 land are secured in the desired adjusted positions by set screws such as shown at* 1.31. Each hanger arm is formed at its lower end Iwith a. yoke 'or saddle 132 and a pin 133 extend ing between the arms of the yoke or saddle.

Heavy rods orbars 140 are secured ben eath the platform boards 95 adjacent to the ends of the boards. Any suitable means may be provided for attaching these bars 140 to the platform boards,such for instance, as the metal .loops or straps 141. The rods or bars-msj? be attached to single large platform boardside to certain sections of a sectional board.

Itwill be observed that the ends of the j adjacent to the inner faces of the side frame of the machine in position to engage and be supported by the pins 133 in the yoked ends of hanger arms 130.`- v

From the above description, it will be observed that tlie step by step feed of both the sleeves, the screws 6 are reduced to a greater The shaft 111 is geared in the" rods or bars 140 project laterally `to points' main and auxiliary pile elevating mechais pivoted at 114 a pawl 112a having a l boxes 120 have inwardly projecting heavy main pawl 38 is thrown out of engagement:

with its ratchet wheel. illhenfthe main ele-- rating mechanism is being operated by motor, the auxiliary mechanism may be in action.

ln addition to the automaticv operation of both elevatingmechanisms, and the motor driven operation of' the main elevating vmechanism, it will of course be understood that both of these elevating mechanisms may be operated and adjusted by hand. In Fig. 3 We have illustrated aremovable crank handle 150 upon'the shaft ll of the main elevating mechanism, and a removable crank handle 155 upon the shaft lll of the auxiliary elevating. mechanism. These crank handles operate in the usual way andby them the pile supports of both mechanisms may be raised or lowered to suit the var ing requirements.

vhe'operation of the' machine maybe de'- scribed asy follows: In starting a joh upon, the feeding machine equipped with our improvements, a pile of sheets is placedupon the supportingnframe of the main elevating mechanism as 'in`theordinary feeding machine, and sheets are fed from the pile while the table is automatically elevated to suit the requirements ofthe machine, until the pile'is nearly exhausted.,A When the pile is nearly exhausted, the main pile support will he near the upper end of its travel, and the platformk boards will be within range of the hanger arms of the auxiliary elevating mechanism.. At this point in the operation, while the` feeding machine continues to operate, the hanger arms 130 are thrown over into enga ement with the bars 14.0 secured beneath the platform, and the partsrigidly clamped engaged position, it being understood that it 1s a simple matter to adjust the position of the hangers to any lrequired elevationby theoperation of the auxiliary elevating mechanism by hand. As soon as the pile is under thecontrol of the auxiliary elevating mechanism, the operator throws the main elevating mechanism into gear with the motor and rapidly returns the pile support of the main eleva-ting mechanism to its initial position atthe base of the machine 'where a new set of platform boards is put in position and a new pile loaded thereon. The feeder will continue to operate from the remainder of the initial pile carried by the auxiliary elevating mechanism, until it is entirely exhausted, when the feeding n'lachine is momentarily .stopped to remove the platform boards of the exhausted pilefand shift the hanger arms back out of the wayand elevate the new pile either by hand operation or by the action of the mot-or to bring the top of the, new pile at the proper elevation for the continuance of the operation of the feeding machine. The operation isv then repeated as above described.

' 'A valuable feat-ure of our present improvements is the arrangement whereby the machine may he operated with one o-rfboth of the pile elevating mechanisms,'so that if the operator prefers to run his machine upon the plan of the Iold form of feeders haring asingle pile elevating mechanism,

he can do so. vThe addition of the auxiliary feeding mechanism does not alter th operation or usefulness of the main feeding mechanism of the machine, and even though equipped with the auxiliary feeding mechanism, a pile can be fed from start to finish upon the main feeding mechanism without using the auxiliary` mechanism.-l

What we claim is: y

l. ln a paper feeding machine, the combination of a frame, the main and auxiliary pile elevating mechanisms, including coupled pawl and, ratchet mechanisms, a pile governor controlling the operation of said coupled pawl and ratchet mechanisms, and

means for independently .throwing saidV pawl land ratchet mechanismsinto and out of operation'.

2. ln a paper feeding machine, the combination of a frame, .the main and auxiliary pile elevating mechanisms, automatically -Controlled means for .operating said main and auxiliary mechanisms, independent means for throwing said elevating mechanisms into and out of operation, and an independent power driven mechanism for operatingsaid main elevating mechanism.

3. .ln a paper feeding machine, the combination of a frame, the main and auxiliary Vpile elevating mechanisms, automatically controlled means forV operating said main and auxiliary mechanisms, independent means for throwing said elevating mechanisms into and outl of operation, an independent power driven mechanism for operating said main elevating mechanism, and4 manually controlled means for connecting said power driven mechanism with said mainelevating mechanism.

.4. In a paperv feeding machine, the combination of a frame, the main and auxiliary pile elevating mechanisms, automatically controlled means for operating said main and auxiliary' mechanisms, independent means for vthrowing said elevating mechanisms into and out of operation, an independent power driven mechanismfor operating said main elevating mechanism, and manually controlled reversinggears adapted to connect said power driven mechanism vwith said main elevating mechanism for.

rapidly operating it in either direction.

5. In a paper feeding machine, the combination of a frame, the main and vauxiliary pile elevating mechanisms, automatically controlled means for operating said main and auxiliary 4 mechanisms, independent means for throwing said elevating mechanisms into and out of operation, an independent power driven mechanism for op erating said main elevating mechanism, manually controlled means for connecting said power driven mechanism with said mainelevating mechanism, and means actuated by said manually controlled means for disconnecting said main elevating mech.- anism from said`automatically controlled operating means. 6. In a paper feeding machine, the combination of a fra-ine, the main and auxiliary pile elevating mechanisms, a pawl and ratchet mechanism for each of said elevating mechanisms, means connecting the operating pawls of said mechanisms for actuating them in unison, independent means for A throwing said pawl and ratchet mechanisms into and outof action, and a pile governor controlling the operation of 4both of said pawl and ratchet mechanisms.

7 In a paper feeding machine, the combination of a frame, the main and auxiliary pile elevating mechanisms, a pawl, and ratchet mechanism for each of said elevating -mechanisms, an independent power driven mechanism for o eratiiw said main elevating mechanism, manually controlledI reversing gears adapted to connect said power driven mechanism with said mainelevating mechanism, means actuated by the control of said reversing gears for disengaging the pawl from the ratchet of the main elevating mechanism, and a, pile governor controlling the operation of both of said pawl and ratchet mechanisms.

8. In a paper feeding machine, the combination of a frame, with the main and auxiliary pile elevating screws, mounted in axial alinement in said frame, and the main and auxiliary elevating frames operatingupon said'screws.

9. In a paper feeding machine, the coinbination of a. frame,with the'main elevating' screws, then pile supporting .frame threaded upon said main elevating screws, the auxiliary elevating screws arranged above and in axial alinement with said main elevating screws, an auxiliary pile elevating frame. threaded upon said auxiliary elevating screws, and means for operating the main and auxiliary screws.

10. In a paper feeding machine, the combination of a frame, with the main elevating screws, the pile supporting frame threaded upon said main elevating screws, the auxiliary elevating screws arranged above and in axial alinement with said main elevating screws, an auxiliary pile elevating frame threaded iipoii-said auxiliary elel vating screws, adjustable .means carried bysaid auxiliary `frame for engaging a pile supporting table, and means for operating the main and auxiliary screws.

. 11. In a paper feeding machine, the coming screws, the pile supporting frame threaded upon said main elevating screws, the auxiliary elevating screws arranged above and in axial alinement with said main elevating screws, an auxiliary pile elevating frame threaded upon said auxiliary ele`` bination of a frame, with the main elevatvating screws, adjustable hangers depending l from said auxiliary frame, a pile support-ing table having parts adapted to` be engaged by said hangers, and means for operating-the main and auxiliary screws.

l2. In a paper feeding machine, the combination of a frame, with the main elevating screws journaled in said frame and having reduced upper ends, the main pile elevating frame or platform threaded upon said main 4elevating screws, the auxiliary screw sleeves ournaled upon the reduced ends of the main n levating screws, an elevating frame thread- 4:d upon said auxiliary elevating screw tlceves, and means for operating said main elevating screws and auxiliaiy screw sleeves. t 13. In a paper feeding machine, the combination of a frame, with the main elevating screws journaled in said frame, the main pile elevating frame .or platform threaded upon saidinain elevating screws, the auxiliary elevating screwsjournaled upon and in alinement with the main elevating screws,- an elevating frame threaded upon said auxiliary elevating screws,` adjustable means carried by said auxiliary elevatingframe for f uponsaid main elevatin-gscre'ws, the auxiliary elevating screws )ournaledjin said frame above the main elevating-screws, an auxil- "iary elevating frame threaded vupon-,said

auxiliary elevating screws, bars mounted in v'said auxiliary frame, hangers depending from said bars, a pile su port-ing platform having rods projecting om it, means of engagement between said hangers and said rods, and means for operating the main and. auxiliary elevating screws.

15. In a paper feeding machine, the com- 'iso .the upper ends" of said main elevating f screws, screw sleeves journaledupon the ,geared to the uppdr ends of said main'ele- 'vatting screws, en auxiliary pileelevating said auxiliary screws,` apile governor conv'trolling the operating mechanisms of the,

bination with a suitable frame, the main elevating frame threa bination with a suitable frame, the main elevating. screws journaled in said frame, a main pile elevating frame threaded upon saidy main screws,l .operating mechanism va 7ing' screws,` auxiliary elevating screws lofnaled 1n said frame above said main eleframe threadedupon saidauxiliary screws, auxillary operating 'mechanism geared to main and auxiliar screws, and independent devices for throwing said operating mechanisins into and out of act-ion.

16. In a paper feeding machine, the comvating screwsjournaled in said frame, aA main plle elevating frame three/ded u on Said' screws, operatlng mechanism geare to main elevating serews an auxiliary ile eleded upon 'sal screw sleeve, auxiliary operating mechanism geared to sald screw sle'eves,'bars mounted 1n said 'auxiliary frame, hangers depending from said bars, a pile supporting'plattorm having rods projecting from it, and means oi.A

engagement between said hangers and said rods.

17. In a paper :feeding machine, the combination of a frame, the main pile elevating mechanism mounted in said frame, an auxiliary elevating mecli'anism mounted in said frame and including a traveling frame, hanger arms depending from said traveling frame andformed with yoke-shaped lower ends, pinsextending between the arms of l the yokes; a pile supporting platform, and rods projecting from the pile supporting platform into said yolres and supported by

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