US1077400A - Paper-delivery mechanism. - Google Patents

Description

M. A. DROITCOUR. "PAPER` DELIVERY MBGHANISM. APPLICATION FILED FBB.19, 1912.

' Patented NOV. 4, 1913.

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M. A. DROITGOUR.

PAPER DELIVERY MEGHA NISM.

APPLICATION PILED'IEB.19, 1912.

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PAPER DELIVERY MEOHANISM. APPLICATION PILED 1213.19, 1912.

Patented Nov.4,1913.

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M. A. DROITCOUR. PAPER DELIVERY MEGHANISM. APPLIGATION FILED FEB.19, 1912.

Patented Nov. 4, 1913.

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M. A. DROITGOUR.

PAPER DELIVERY MEGEANISM.

APPLICATION FILED IEB.19, 1912.

4l'zatented Nov. 4, 1913.

'7 SHEETS-SHEET 5.

M. A. DROITCOUR.

PAPER DELIVERY MEGHANISM.

APPLICATION FILED PBB.19, 1912.

.7 SHEETS-SHEET 6.

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. Patented 'N ov. 4, 1913.

M. A. DROITGO'UR. PAPER. DELIVERYv MEGHANISM. APPLICATION FILED Hume, 1912.

Patented N0v.4,1913.

7 SHEETS-SHEET 7.

Mullin 'no sfrnrnfs rai-i IIICHAELANDR'EW DROITOOU'R., or Oak PARK', ILLINOIS, A'ssIGNon. 'ro MIEHLE PRINTING rniess AND MANUFACTURING COMPANY, or CHICAGO, ILLINOIS, .e

CORPURTION 0F ILLINOIS.

PAPERDELIVERY MEGFINISM.

Bpecieation of Letters Patenti Patented Nov. 4L, 1913.

Application led February 19, l1912. Serial No. 678,498.

attachment forA printing presses although,

the invention is not restricted to this particular use.

One of the primary objects of this invention is the provision of mechanism for vpositively separating and withdrawing printed sheets from a printing cylinder, conveying the same to a delivery pile or stack' and depositing the sheets on the pile in regular order and in uniform position. With this end in view I have provided pneumatic means for separatin the sheets from the printing cylinder an conveyiinrJ the same to the delivery pile and have also provided mechanism for controlling the operation of the pneumatic means so that 4the rear ends of the sheets of paper will be released from the carrier and deposited on the pile before the front ends are deposited, thereby obviating any possibility of the forward `end of one sheet being caught under .the rear end of a preceding sheet.

Many other objects and advantages of the present invention will be understood from the following description when considered in connection with the accompanying drawings illustrating one practical embodiment of the invention.

YReferring to the drawings-Figure 1 is a plan view of a delivery mechanism embodying the invention; Fig. 2 is a side elevation thereof; Fig. 8 ls a diagrammatic. view illustrating the driving mechanism for the perforated bands; Fig. a is a dia rammatic view illustrating the manner of c riving the valve operating mechanism which controls 8-8 of Fig. 1; Fig. 9 is a sectional view taken on the line 9 9 of Fig. 8; Fig. 10 is a vertical septional view taken through one of the suction shoes; Fig. 11 is a sectional view through the shoe taken on the line v11--11 of Fig. 10V; Fig. 12 is a view looking at the bottom of the structure shown in Fig. 11; Fig. 13 -is av fragmentary plan View taken on the line 13-13 of Fig. 10; Fig. 14 is a side elevation, partially in section, showing one of the initial suction devices and the adjacent end of a suction shoe; Figi 15 (Sheet 2)A is a sectional view taken on the line 15-15 of Fig. 10; Fig. 16 is a view taken on the line 16-16 of Fig. 15; Fig. 17 is a transverse sectional view taken through the delivery mechanism just back of the brake device; Fig. 18 is an enlarged fraofmentary view taken on the line 18-18 of Fig. 17 g and Fig. 19 is a sectional view taken on the line 19-19 of Fig. 18.

On the drawings, reference character 21 designates a printing cylinder mounted upon suitable standards or supports 22 provided with rearwardly projecting brackets or arms 23 u on which the delivery mechanism isy pivotal y mounted, so that its free or delivery end may be swung upwardly or downwardlyv about its receiving end as a center,

as will `be later described. A. shaft 24, journaled attlie outer ends of the brackets 23, is surroiinded'by a sleeve 25 upon the ends of which are fixed the blocks or castings 2G and27 and to these blocks are secured the receiving ends of the side frame members 28 and 29. after described is carried by these side mem'- bers so that it may be swung upwardly out of position around the axis of the shaft 24, if-desired, A delivery table 31 is suspended by vsuitable hangers, beneath the delivery end of the mechanism, toV receive and support the sheets of paper delivered thereto ing cylinder. tweenthe side members is a. plurallty of suc- All of the mechanism herein'- -i Ition shoes 33, 311 and 85, the receiving ends these suction shoes 33, 34 and 35 is divided partition Walls 42, 43 and 44 into four chambers or compartments 45, 46, 47 and 48 of which the one characterized by 45 is comparatively large extending, as will b e seen,'

from areceiving drum 37 to the partition 42 disposed substantially midway the lengthy of the appliance. Each of these shoes is made, as will be observed from Fig. 1l, in the form of a shell provided on its under surface with a series of perforations 49. Around the pairs of alined pulleys or drums 37 and 39 are passed endless belts or bands 5l, 52 and 53, each being preferably made of metal and provided at intervals with apertures or slots 54 obliquely disposed to pass successively over the apertures 49 in their respective shoes whereby suction in the shoe chambers, the apertures of which are covered by these belts or bands, is made applicable to the sheets of paper through the slots in the bands. as having two series of apertures and two bands 52 are shown as coperating therewith. The two series of slots and the two bands are employed in this particular location to enable the devicev to handle paper which may be slitted in the center inthe usual manner but, obviously, a single band y similar to the bands 5l and 53. may be used in the center of the mechanism if unslitted paper is to be handled.

In order that the positions of the two outside suction shoes 33 and 35`may be adjustable for proper action on sheets of paper of different widths l have provided each of these outside shoes with a pair of opentopped internally-threaded lugs 55, one such lug being'shown in Fig. l0. The mechanism is provided with two comparatively long screws 56 and 57 rotatably mounted inl the slde frames 28 and 29 and each having its halves provided with right and left hand screw-threads disposed in operative engagement with the lugs 55. In'order to bring about a simultaneous and equal rotation of these two screws 56 and 57 .I havev equipped each with a sprocket wheel 58a coperating with both of which isa sprocket chain 58, one of the screws having an operating han'" dle 59. Since the two outside shoes are slid' ably supported upon the cross-shaft 6l and the sleeve 25 it will be apparent that the simultaneous approach or separation of these shoes may be readily effected by simply turning the handle 59. Since the pulleys or drums 39 are carried by the arms 38 at one The center shoe is shown 1 end of the shoes and the pulleys or dnums 37 are splined to move longitudinally on the sleeve 25 between the arms 36 at the other end of the shoes, these pulleys and the apertured metallic belts passing around them will be simultaneously and equally shifted with their corresponding suction shoes, sol that under all circumstances these belts or bands 52 and 53 will be maintained in register with the perfo-rations in their respective suction shoes. From an inspection of Figs. 2 and 5 it will be observed that the pulleys lor`drums 39 are smaller than the pulleys 37, consequently th'e delivery ends of the tapes are disposed in a higher plane than the receiving ends and the paper will be carried along with its forward end disposed above its rear end. The suction shoes, of course, are inclined to correspond with the inclina tion between the lower edges of the pulleys v37 and 39. This inclination of the paper has 'been found desirable for the reason that when the paper has been released, rear end first, as will be later described, it will tend ias it falls upon the pile to glide or soar toward the cylinder end ofthe delivery table against the guides disposed thereon, thereby assisting the joggers in making a straight edged even pile.

The sleeve 25 is given a variable intermittent rotation causing a variable and intermittent travel of the perforated steel bands or belts by means of mechanism which I will now describe: The shaft 6l of the cylinder 21 has fixed thereon a sprocket wheel 62 around which passes a sprocket chain 63 vencircling another sprocket wheel 64 on the shaft 24 rotatably mounted in the side frame members 28 and 29. Upon the opposite end of theshaft 24 is mounted a sprocketwheel '65 around which passes a sprocket chain 66 also encircling another sprocket wheel 67 fixed on a shaft 68 mounted onA the side member 28 and carrying at its inner end a `similar sprocket wheel 69. A sprocket chain 7l encircles the sprocket wheel 69 and another wheel 72 mounted on a stub shaft 73 also carried by the side frame member 28. T he sleeve 25 has fixed to one end thereof a sprocket wheel 74, a similar sprocket wheel 75 being rotatably mounted on a stub shaft 7 6 carried by the side frame member 28 and va sprocket chain 77 passing around these companion wheels 74 and 75 has securely vrfastened thereto three yokes 78, 79 and 81 each consisting, as is shown in Fig. 3, of a pair of parallel arms spaced apart. These :tion being such that as the roller 83 leaves the yoke 79 the chain 77 will remain stationary until the roller 84 travels fro-m the position shown in Fig. 3 to the remotest point of the wheel 69, whereupon it enters the yoke 81 and carries the yoke with it to the remotest point of the wheel 72, thereby intermittently imparting to the chain 77 a variable movement. During the period that the chain 77 and, consequently, the perforated bands 51, 52 and 53 are at rest the paper will be released at the discharge end of the mechanism, as hereinafter explained.

Referring now to the means for applying suction to the shoes and the drums mounted at each end thereof and controlling the action of the air it will be observed that the suction pump (not shown) is connected withl each of the suction devices through a main is also connected with the chambers 45 of the movable side shoes 33 and 35 through the flexible pipes or hose 87 and 88, respectively, these ieXib-le connections being adapted to permit the adjustment of the outer shoes toward and from the middle shoe by the mechanism previously described.

A continuous suction is accordingly applied to the chambers 45 of each of the shoes. By reference more particularly to Fig. 14 it will be observed that the tape drums or pulleys 37 which are provided with peripheral perforations 37 and are mounted to rotate in proximity to the printing cylinder 21 are each disposed in close proximity to the receiving ends of its respective shoe chamber 45. A suction member or bo-x 89, (Fig. 14) having its hub 91 splined upon the sleeve 25, is disposed. within the perimeter of each drum 37 with its open curved mouth disposed adjacent and within the revoluble perforated rim of the drum. The suction member is held against rotation with the drum by an arm 92 projecting from its hub which is connected by a link 93 with the spaced arms 36 at their junction. Suction is applied to each of the boxes through suction pipes 94, 95 and 96, the pipe 95 being connected with the main suction pipe 85 through a branch or connection 97 and the pipes 94 and 96 being connected with the suction by connections 98 and 99 com municating with the chambers 45 of the side shoes 33 and 35, respectively.'

Since it is necessary and desirable that suction be applied to the boxes or suction members 89 intermittently only and at the time that a sheet is to be delivered from the printing cylinder, I have provided mechanism for automatically controlling the suction to the boxes 89, which willnw be described.

By reference to Figs. 5 and 6 it will be seen that the pipes 94, 95 and 96 are equipped with controlling valves 101,102 and 103, respectively, and the mechanism for intermittently opening and closing these valves is bestshown perhaps in Figs. 7 to 9 inclusive. A cross-shaft 104 extends transversely of the machine above the pipes 94, 95 and 96 and upon this shaft in proximity to the valves 101, 102 and 103 are secured downwardly projecting curved arms 105 shaped at their `free ends to engage with arms 106 fixed to the stems of said controlling valves. The shaft 104, which is supportedl in brackets 107 from the frame is oscillated at predetermined intervals to swing the arms 106 from full line to dotted line position, shown in Fig. 9 and vice versa, by a link 108 attached at one end to an arm 109 fixed on the shaft 104 and connected at its other end with a lever 111 pivoted on the frame at 112 and adapted to be actuated by a rotary cam 113 which operatively engages a follower 114 mounted on the lever 111. An expansion spring 115 normally urges the follower into engagement with its operating cam. A shaft 116 upon which the cam 113 is fixed extends transversely of the appliance through the valve mechanism 117, 118 and 119, to be later described, and carries at one end a sprocket wheel 121. Referring to Figs. 1, 4 and 7, it will be seen that the sprocket Wheel 121 is continuously driven by a sprocket chain 122 encircling a drive 'sprocket wheel 123 mounted on the shaft 24 and a companion sprocket wheel 124 mounted on the side frame member 29, the chain 122 being disposed beneath the wheel 121 and' in engagement therewith and lbeing adapted to travel at a constant speed in the direction of the arrow shown in Fig.

4. It will be evident thatthe valves 101,

102 and 103 will be intermittently opened and closed upon each revolution of the cam 113, thereby intermittently turning on and shutting ofl the'suction to the suction boxes 89. Thus it will be seen thatsuction is intermittently applied to the suction boxes 89 to separate the printed sheets from the printing cylinder and that suction is continuously applied to thechambers 45 of the suction shoes so that the sheets picked up by the perforated tapes or bands-traveling past the suction boxes 89 will be carried along by the bands beneath the chamlbers 45.

.justment of the pulleys the links 126 connected to the arms 127 of the suction boxes 125 are each provided, as shown in Figs. 10 and 13, with an elongated slot 127 through which a guide bolt 1,28 is passed to secure the link to a guide standard 129. An adjusting bolt 131, projecting through an upwardly extending portion of the guide standard, is threaded into the end of the link so that upon turning the bolt t-he link and its corresponding pulley 39 will be adjusted longitudinally of its respective shoe to apply the proper tension to its perforated band. Suction is applied to the .suction 'boxes 125 and the suction chambers 46, 47

and 48 of the respective suction shoes through pipes 132, 133, 134 and 135, respectively, the inner end of each of these tubes being connected with a valve casing 136 housing a valve member 137 mounted on the cross-shaft 116.

The valve casings and the valve members mounted therein constitute the controlling valves 117, 118 and 119 previously mentioned, each of these controlling valves controlling the application of suction to its respective delivery pulley 39 and the intermediate chambers 46, 47 and 48 of its companion suction shoe. Since it is desirable that the rear end of the p'aper loe released from the suction means before the'release ol the front end so that the rear end .will first fall upon the delivery pile, thus obviating any p'ossibility'of the forward end of the succeeding sheet being caught beneath the rear end of its preceding sheet, the control ling valve is so constructed that suction will be shut oft successively from the chambers 46, 47 rand 48 of the suction shoes and last from the suction boxes 125, the forward end 'of the sheet being thereby sustained some little time after the rear end has been released. vlo this end the valve members 137 of each of the controlling valves 117, 118 and 119 is provided adjacent its periphery with an elongated arcuate slot 138, (Fig. 16)

the walls of each slot being formed to p-rovide flanges 139 adapted to Contact with one wall of the casing 136. The rear ends of the suction tubes 94, u 95 and 96 communicate with the casings o-f 'their respective valves 117, 113 and 119 on one side of the valve members 137 while the tubes 132, V133, 134 and 135 communicate with the casings on the opposite side of the valve members. Suction will thus be continually supplied to the chamber 141 of each controlling valve as will be evident from an inspection of Fig. 15. As the shaft 116 rotates, carrying with it the valve members 137, the slots 133 will be first brought into registration' with the tube 133, thereby applying suction to the chamber 46. Similarly suction will be ap plied to the chamber 47, the chamber 48 and, lastly, to the suction box 125 through the pipes 134, 135 and 132 as the slot 133 is member continues to rotate it will be appar-- ent that suction will be shut 0E from the chamber 46 first, then from the chamber 47, then from the chamber 48 and, lastly, from the suction box 125, thus permit-ting the rear end of the paper to be first released and t0 drop upon the pile prio-r tothe release of the forward end. l

The intermittent and variable travel. of

the suction tapes and the mechanism for effecting this movement has been previously explained in connection with the diagrammatic showing in Fig. 3 and it will be re membered that there is a period, after one of the yokes on the chain 77 has been released by one of the rollers on the chain 71 and before the preceding roller has engaged with a succeeding yoke, when the chain 77 and consequently the suction tapes will remain stationary. ln order to prevent accidental movement of the chain 77 at this period, which Would, of course, displace the position of the yoke awaiting to receive its roller mounted on the chain 71, l have provided a brake mechanism shown on an enlarged scale in Figs. 18-and 19. Thisbrake mechanism comprises, as-shown, a braking member 142 pivoted at 143 on a bracket 144 above the lower lap of the chain 77, the downward free end of the braking member being adapted to frictionally engage with the chain 77 and thereby hold the chain against accidental movement during the period when no roller on the chain 71 is engaged with its respective yoke on the chain 77. The braking member is yieldingly urged into engagement with the chain by an errA pansion spring 145 encircling an adjustable bolt 146 threaded into a stationary base 147 above the chain. rlhe frictional engagement between the braking member and the chain can be regulated, as will be obvious, by manipulation of the bolt 146. rllhe intermittent actuation of the perforated tapes is timed, of course, tov correspond with the operation of the printing cylinder of the printing press and the sheets of paper will, therefore, be delivered to practically the same point of the tapes at each operation.

Manifestly there will be a portion of the tapes betweenthe successive delivery portions with which paper will not be brought Y from Fig. 1, thereby reducing the suction necessary to the successful operation of the device toa minimum;

I prefer to employ elongated slots 54 arranged diagonally of the tape so that the interval between successive applications of suction to the paper from the suction apertures in the shoe may be brief, and, in some instances, I prefer to have the slots end and begin respectively on a given cross-line on the tape so that the suction may be continuous. This arrangement of the slots is substantially illustrated in Fig..1. It has been found also that this construction providesa more uniformly strong carrier tape.

The operation of the mechanism `described is substantially as follows.: As the forward edge of the sheet of paper on the printing cylinder 21 approaches delivery position at each alternate revolution of the cylinder the travel of the perforated tapes is initiated by operative engagement of one of the rollers on the chain 71 with its companion yoke on the chain 77. Simultaneously suction is ap plied to the suction boxes 89 in the tapey drums 37 by the automatic opening of the valves 101, 102 and 103. The suction action of the suction boxes 89 through the perforated rims of the drums 37 and through the perforated tapes separates the printed sheet from the printing cylinder, saidv sheet being carried along by the traveling tapes and held against the tapes after it leaves the suction boxes 89 by the continuous suction in the long chambers 45 of. the suction shoes. When the forward edge' of the sheet of paper reaches or approaches the chambers 46 of the shoes, suction is automatically applied 4to said chambers by the controlling valves 117, 118 and 119 and as the sheet continues to travel with the tapes suction is applied successively to the chambers 47, the chambers 48 and finally to the suction boxes 125 disposed within the tape drums 39. When the forward edge .of the paper has been brought approximately to the extreme edge of thesuction boxes 125 the travel of the tapes is stopped by disengagement of the roller on the chain 71 with its yoke on the chain 77 and further movement of the tapes is prevented by the friction brake member 142. At approximately the time that the tapes are stopped the suction is cut ofi:l from the chambers 46 thereby releasing the rear edge of the paper and, in succession, the suction is also cut Vod from the chambers 47 and the chambers 48 thereby permitting the rear edge of the paper to drop a considerable distance toward the delivery pile before the forward edge is released by cutting off the suction to the suction boxes 125. When the suction to these boxes is finally cut oif the sheet is permitted to fall and by reason of the inclined position of the suction shoes and, furthermore, by reason of the fact that the rear end is rst released, the sheet will tend to soar .or glide toward and into engagement with the guides at the printing cylinder end of the delivery table 31 so that an even smooth edged pile is prduced.

While I have shown and described a preferred embodiment of my inventionit will be apparent that various changes in the mechanical construction and `in the size, shape, proportion and arrangement of the various partsmay be resorted to without departing from the substance of the invention or sacrificing any of the material advantages thereof.

I claim:

1. In a paper transporting mechanism, the combination of a pneumatic device for withdrawing a sheet of paper from a printlng cylinder, means for supporting the ends of the sheet and transporting said sheet away from said cylinder, and controlling means -for causing the 'release of the rear end of said sheet prior to the release of the forward end thereof, substantially as described.

2. In a paper transporting mechanism, the combination ofmeans for pneumatically separating a sheet from a printing cylinder, a traveling tape, means' for pnematically holding the sheet against said tape whereby and controlling means whereby the Ipneumatic action upon the sheet is discontinued sequentially from one end of the sheet to the other, substantially as described.

3. In a paper transporting mechanism, the combination of a 'pair f perforated tape drums, a perforated tape surrounding said drums, a suction shoe dis'posed between said drums and adjacent the lower travel of said tape, means for causing said tape to travel around ythe drums, means for inducing suc- `tion through said ytape in the drums and in the suction shoe, and means for automatically controlling the suction inl said drur'ns and shoe, substantially as described.`

the combination of a perforated drum, a suction box disposed therein, a suction shoe comprising a plurality o'fcompartm'ents and having one end disposed in proximity to said drum, a perforated tape arranged to travel around said drum and adjacent said shoe, means for applying suction to said suction box and said shoe whereby to hold a sheet by suction against said traveling tape and means for controlling said slction, substantially as described.

5. In a paper transporting mechanism, the combinationof a pair of perforated drums, suction boxes arranged in said drums, a suction shoe disposed between said drums with its ends in proximity thereto and comprising. a plurality of compartthe sheet is caused to travel with the tape,

4. In a paper transporting mechanism,

V12pc ments, a .perforated tape arranged to encircle said drums and travel adjacent to said shoe, and means for applying suction to the suction boxes and the compartments of the shoe whereby to retain a sheet by suction in contact with the traveling tape, substantially as described.

6. In a paper transporting mechanism, the combination of a suction shoe divided into a plurality of compartments, a perforated drum at one end of the shoe, a suction box disposed therein, and means for inducing and discontinuing suction in said compartments and in said-box successively, substantially as described.

\ 7. In a paper transporting mechanism, the combination of a suction shoe divided into a plurality of compartments, a pair of perforated drums disposed at the ends thereof, a perforated tape arranged to travel around said drums and in proximity to said shoe, means for inducing suction in one of said drums at predetermined intervals, and

means for successively inducing suction inl a plurality of compartments in said suction shoe and in the other perforated drum at. predetermined intervals, substantially as described. Y

8. In a paper transporting mechanism, the combination of a pair of drums, a suction shoe disposedv between said drums, a perforated tape arranged to travel around the drums and in proximity to said shoe, means for imparting an intermittent movement to said tape, and a device for preventing accidental movement of the tape in the interim between said successive movements, substantially as described.

'9. In a paper transporting mechanism, the combination of a pair of drums, a paper carrying device arranged to travel around said drums, driving mechanism including a chain for imparting an intermittent movementto said paper carrying device, and friction means continuously engaging directly with the chain for locking the chain against displacement during the intervals between the intermittent movements thereof, substantially as described.

10. In a paper transporting mechanism. the combination of a suction shoe, a pair of drums disposed adjacent to the ends thereof, a paper carrying device arranged to travel around said drums in proximity to and beneath the shoe, and means for supporting a sheet against the under surface of said device, said shoe and paper carrying device being inclined so that the forward edge of the sheet being transported is disposed at a higher elevation than the rear edge thereof, whereby upon release of the sheet the rear edge thereof will be deposited upon the pile in advance of the forward edge, substantially as described.

11. In a paper transporting mechanism,

thecombination of a suction shoe-comprising a series of suction chambers arranged.

end to end, drums mounted at each end of said shoe, a suction chamber arranged within each drum, a suction tube, connections between said tube and each of said chambers, and means for automatically establishing and suppressing connection between said.

suction tube and each of said chambers in succession, substantially as described.

12. In a paper transporting mechanism, the combination of an elongated suction shoe comprising a series of suction chambers, a drum mounted at one end of said shoe, a suction chamber arranged in said drum, a suction pipe connected with each of said chambers, and an automatic valve for successively establishing and suppressing connection through the pipes with said chambers, substantlally as described.

13. In a paper transporting mechanism, the combination of a suction shoe, suction drums disposed at each end thereof, a perforated tape arranged to travel around said drums and in proximity to said shoe, means for intermittently applying suction to one of said drums, means for intermittently applying suction to the other drum and to said shoe at intervals throughout its length, and means whereby the distance between said drums may be varied to tension said tape, substantially as described.

1li. A paper transporting device comprising a suction cylinder having means associated therewith -for limiting the suction area thereof, a suction tape on said cylinder provided at intervals throughout its length with a plurality of spaced perforations, a suction shoe divided into compartments, said suction shoe having similarly spaced perforations in each of said compartments, means for causing said tape to' travel on the face of said shoe, means for applying suction to said cylinder and said compartments, and means for withdrawing suction from said compartments in succession, substantially as described.

15. In a paper transporting mechanism, the combination ofy a suction shoe having a plurality of compartments, a suction drum at each end. of said shoe, a perforated tape v compartments, and means for successively varying the suction in said compartments, substantially as described.

17. In a paper transporting mechanism, the combination of a hollow suction shoe divided into compartments, a suction drum at the forward and rearward end of said shoe, an endless carrier adapted to travel upon said drums and across the face of said s oe drums and said shoe, whereby a sheet of paper is held and transported upon said carrier, and means for releasing said paper from said carrier by rst destroying the suction in said shoe and then destroying the suction in said rear suction cylinder, substantially as described.

18. In a paper transporting mechanism, the combination of a hollowl suction shoe having a series of compartments, openings into said compartmentsthrough the face portion of said shoe, a suction drum arranged at the rear end of said shoe, an endless carrier having perforations therein arranged to travel on said drum and substantially upon the face portion of said shoe, means for applying suction to said drum and said compartments, whereby a sheet of paper may be maintained and carried by said carrier, and means-for releasing said sheet by destroying the suction successively in said compartments and drum, substantially as described.

19. In a paper transporting mechanism, the combination of rotary suction means Jfor successively withdrawing sheets of paper from an impression cylinder, means for transporting said sheets successively, and rotary suction means for successively causing said sheets to be released from said transporting -means, ysubstantially as described.

20. In a paper transporting device, the combination of a pair of suction elements, a belt carrier between said elements, and means for automatically and periodically applying and destroying suction in said suction elements alternately, substantially as described.

21. In a paper transporting mechanism, the combination of a pair of rotary suction elements, a carrier between said elements, and means for. alternately and means -for applying suction to said periodically applying and destroying suction in each of said elements, substantially as described.

22. In a paper transporting mechanism, the combination of a pair of suction carriers arranged substantially parallel to each other, each of said suction carriers comprising a fore and rear rotatable suction element and an intermediate carrying element, means for operating said elements, and means for adjusting said suction carriers laterally to accommodate various widths of paper to be carried thereby, substantially as described.

23. In a mechanism of the character described, the combination of a pair of suction carriers arranged substantially parallel with each other, and means for simultaneously adjusting the front and rear ends of said carriers laterally to accommodate various widths of sheets to be carried thereby, each of said carriers comprising a pair of rotary suction elements and an endless belt traveling on said rotary elements, together with means for applying suction to said Vrotary elements, substantially as described. Y

24. In a paper transporting mechanism, the combination with suction elements having a plurality of suction apertures therein of a tape carrier provided with a `plurality of elongated slots disposed diagonally of the tape and arranged with respect to each other so that the rear end of one slot and the forward end of the succeeding slot in the tape are substantially in registration with one of said suction apertures at the same time, substantially as described.

25. In a paper, transporting mechanism, the combination ofa suction shoe, suction drums disposed at each end thereof, a perorated tape arranged to travel around said drums and in proximity to said shoe, means for intermittently applying suction to one of said drums, means for intermittently applying suction to the other drum and to said shoe at intervals throughout its length, and means for varying .the tension on said tapesubstantially as described.

MICHAEL ANDREW DROITCOUR.

Witnesses:

C. I. MANSEN, CEAS. HICKMAN.

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