US1691963A

US1691963A - Paper-feeding machine

Info

Publication number: US1691963A
Authority: US
Publication date: 1928-11-20
Anticipated expiration: 1945-11-20

Description

15 Sheets-Sheet l T. C. DEXTER PAPER FEEDING MACHINE Filed June 27, 1925 Nov. 20, 1928.

ATTORNEYS.

Nov. 20, 1928. 1,691,963

'r. c. DEXTER PAPER FEEDING MAGHI NE Filed June 27, 1925 15 Sheets-Sheet 2 m m g N M 0 l a? g J imll 5 llllllllllllllllIN III III.

IN VEN TOR.

A TTORNEYS.

Nov. 20, 1928.

T. C. DEXTER PAPER FEEDING MACHINE Filed June 27, 1925 13 Sheets-Sheet 3 IN VEN TOR. M612 W M 11 5M A TTORNEYS.

Nov. 20, 1928.

T. C. DEXTER PAPER FEEDING MACHINE Filed June 27, 1925 13 Sheets-Sheet 4 INVENTOR ZM C %lzd G KN ATTORNEYS.

1,691,963 T. C. DEXTER YAPER FEEDING MACHINE Filed June 27, 1925 15 Sheets-Sheet 5 N S i 5 g a a x Q 3 & M H z um \Q R. 6 S. r V m H V A m N N E Jl1i\ W J v 11 D E R Q 7 n r F m V m J r I m M Q W w 5 gfi H 3 5 K. M a M a r W W W 1 W W Y w W B V m w t d W i X W J 4 g m m 3 m n 6% w W 3 @T m J a A: T Q M i R S W w u a W W w a E v kn F M 3 M P w m |l|| m J f" EL. w m E i 3 i E E H n N 00 Q a u Nov. 20, 1928.

Nov. 20, 1928. 1,691,963

T. C. DEXTER PAPER FEEDING MACHINE Filed June 27, 1925 13 Sheets-Sheet 6 NVENTOR.

WM lV/f m ATTORNEYS.

Nov. 20, 1928.

T. C. DEXTER PAPER FEEDING MACHINE Filed June'27, 1925 13 Sheets-Sheet 7 IN VEN TOR. 7% c, 291 A; BY

avrmjma V A TTORNEYS.

Nov. 20, 1928.

T. C. DEXTER PAPER FEEDING MACHINE Filed June 27. 1925 13 Sheets-Sheet 8 INVENTOR. YM a, $1 25; BY 4 m ATTORNEYS.

Ndv. 20, 1928.

T. C. DEXTER PAPER FEEDING MACHINE Filed June 27. 1925 13 Sheets-Shae; 9

INVENTOR. BY M 6 m (i M r ATTORNEYS.

Nov. 20, 1928.

T. c. DEXTER PAPER FEEDING MACHINE Filed June 27, 1925 13 Sheets-Sheet 1o INVENTOR.

2f 6. may By li wl V ATTORNEYS.

Nov. 20, 1928.

INVENTOR.

BY off/ \1 M ATTORNEYS.

Nov. 20, 1928.

T. C. DEXTER PAPER FEEDING MACHINE Filed June 27, 1925 13 Sheets-Sheet 12 INVENTOR. M (j, m BY W1! A w ATTORNEYS.

Nov. 20, 1928. 1,691,963

T. c. DEXTER PAPER FEEDING MACHINE A TTORNEYS.

Ratented Nov. 20, 1928.

UNITED STATES TALBOT C. DEXTER, OF PEARL RIVER. NEW YORK.

PAPER-FEEDING MACHINE.

Application filed June 27, 1925.

This invention relates to paper feeding machines and more particularly to the class of machine wherein pneumatically controlled devices are used to select and feed the paper.

Among the objects of invention is to provide a paper feeding machine which acts automatically to control the operation of devices in causing a sheet of'paper to be picked up and advanced a predetermined distance.

Another object resides in controlling the length of advance of a sheet of paper by the sheet of paper being advanced so that the distance advanced by each consecutive sheet of paper is a constant measurement whereby sheets of paper are deliverable from a feeding machine at a uniform rate.

Another object resides in prcnlueingr a mechanism in the nature of a sensing device which will determine whether a sheet of greater thickness than that for which the device adjusted. or whether more than one sheet of paper, has been selected and advanced from the pile of paper, and in either case automatically shutoff pneumatic feed devices from operation.

Another object resides in providing: mech anism that will cause a pile of paper on a table to be raised by power after a predetermined number of sheets of paper has been removed from the top of the pile.

lVith these and incidental objects in view. the invention consists of certain novel features of construction and combination of parts. the essential elements of which are set forth in the appended claims and a preferred form of embodiment of which is described hereinafter with reference to the drawinc's which accompany and form part of the specification.

Fig. 1 is an elevation of the left side of the paper feeding machine.

Fig. 2 is an elevation as viewed from the front of the machine.

Fig. is a view, partly in section on line E S of Fig. 1.

Fig. l is a rear elevation of the machine.

Fig. 5 is a plan view.

Fig. 6 is a sectional view taken on line 66 of Fig. 5.

Fig. 7 is an elevation of the right side of the machine.

8 is an enlarged view of the controlling mechanism for the pneumatic paper selectinn and feeding devices with the parts in normal position.

Fig. 9 is a detail of the three position air Serial No. 39 901.

passage valve in the first position when feed of paper is discontinued.

F

10 and 11 are details of the three position air passage valve with the valve in the second and third positions respectively.

Fig. 12 is a plan view of the suction cylindcr.

Fig. 13 is a section of the suction cylinder shown in Fig. 12, on line 1313.

Fig. 14 is a section of the suction cylinder, longitudinal of the axis of the shaft.

Fig. 15 is a perspective view of the fixed member within the suction cylinder.

Fig. 16 is a detail in elevatihn of the mechanism for automatically shutting off the oporation of the paper selecting and feeding de- VICPS.

Fig. 17 is a section as viewed. from the left of Fig. 16 illustrating the relative positions of the parts when one sheet of paper is being advanced.

Fig. 18 is a view similar to Fig. 17 illustrating the tripped positions of the parts when two sheets of paper are being advanced.

Fig. 19 is a plan view of the structure illustrated in Fig. 16.

Fig. 20 is an elevation of the table raising mechanism.

Fig. 21 is a plan view of the mechanism shown in Fig. 20.

Fig. 22 is a detail in perspective of the three control cams for the pneumatic control of the machine.

The entire paper feeding and supporting structure is carried and suspended from left and

right frames

10 and 11. the left frame being supported by two columns 12-13, and the right frame beinq supported by two similar columns l4.15. The lower ends of columns 12-13 are securely embedded in beam 16 and the lower ends of columns l t-15 are likewise securely embedded in beam 17 and both beams may be secured to the floor in a position to feed paper to a printing-press, or to any machine or table. The columns may be cylindrical as shown and in such event a screw connection between each column and frame and beam would be suitable.

Frames

10 and 11 are maintained in spaced relation by two

parallel rods

18 and 19. Figs. 5 and 6. and rod 20 serves the same purpose for

beams

16 and 17.

Mounted at the front or discharge end of the machine between

frames

10 and 11 is a shaft 21 to which is secured a sprocket wheel 2s and pin ion 23. Pinion 23 meshes with gear Sill lllt) llU ' gear ll fast on shaft 17. Fig. 3.

24, keyed to shaft 25. Also keyed to shaft is a pinion 26 which drives gear 2? on shaft 28, Figs. 3, 5, 7, and 20. Shaft 25 is a stub shaft mounted on arm 29 and gear 24 may be replaced by another gear whenever it is desired to vary the driving ratio between shaft 21 and shaft 28. Arm 29 is pivoted on shaft 28 and it is locked in its proper position by screw 80. I

Shaft 28 is journaled in frames 10-11., and it has a bored-out portion 31 forming a conduitwhich cominiuiicates with chamber 32 at its left end by means of holes. At the center of "the shaft the conduit has a slot 33, Figs. 13 and 14:. which opens into a passage 34 in member 3;), keyed to shaft 28-. Member 35 rotates within annular member 36 which is loosely mounteo on shaft 28 by means of hub 37 and held from rotational displacement by bracket 38 loosely mounted on shaft 88. This annular member 36 has a chamber 39 which serves as an intermediate channel of communication between passage 3% and holes 40 of suction wheel or feed roll 41-1 for a short period of time during a single revolution of member 35 v I Feed roll 41 is broad faced and has aplurality of axiallyalig ne'd series of holes, equidi'stantly spacer around its flange-like surface. These holes may be of any configuration and spaced in any desired relation to each other. The roll keyed to sleeve 42 which enca-ses the right-hand portion of shaft 28. Sleeve 42 driven from shaft 21 through gear 43 (Figs.- 2 and 8) mounted thereon which meshes with idler gear at, loosely journaled on red Idler gear 1 1 meshes with On the right end of shaft l? is secured a pinion 48 which drives gear 49 secured to sleeve 42. Feed roll all mounted on sleeve-i2 is driven in acounterclockwise direction (Figs. 6 and 13) and as a result of mechanical expediency, member 35 is driven in the opposite direction. The independent series of gears which drive shaft 28 and sleeve 1-2 hear such relation to cach other that the suction wheel or feed roll will be revolved-at a greater of speed than the 1'o tary member 35, thereby causing several rows of holes $0 to pass the narrow end of chamber 39 do the travel of passage-34 in mem- 35 past the chamber. It is evident that the angular velocity of rotary member 35 may be changed by replacing; gear 2st by one of another size. The rate of spcedrwith which the paperis advanced dependentupon the peripheral velocity of the suction wheel 41. The number of sheets fed per unit of time is dependent upon the angular velocity-of member 35. i

In order to separate the top sheet of paper from the pile of paper 50 on the table 51 a broad end nozzle 52 *"ovided. Figs. 4: and 6 from which a steady am o air flows to lift the top sheet against the surface of the suction wheel. A continuous pressure is maintained in this nozzle during the operation of the machine by means of a blower (not shown) which has connections 53 with the left end of rod 4E5 which is drilled out at that end (Fig. 2). A piece of rubber hose 5st connects the nozzle to this hollow section of rod a5.

Having reference more particularly to Figs. 1, 8,

S

10, and 11 the pneumatic devices for-controlling the selection and feeding of paper will be described. 1%. tube 55 is connect ed to a vacuum pump (not shown) which continuously operates to create a vacuum in chamber 32. The action produces a suck ing effect through holes 10 of suction wheel or feed roll ll whenever inember 35 is in such a position as to connect, by passage 3a, co'nduit with chamber 39, Fig. 13.

The vacuum is maintained in chamber 32 so long as the chamber is not opened to "the atmosphere. Plate 56 which forms the cover plate of chamber has two holes which may be uncovered to break the vacuum in the chamber and the mechanism to cause such condition will now be described.

57 is a three position valve which is rotatively positioned by a Cam on shaft 28, Figs. 3 and 8, which has three concentric surfaces 59. 60, and 61, at different radial distances. Lever is pivoted at 63'to the inner side of frame 10 and itcarries at its upper endan anti... 'iction roller (i l which is urged into engagement with cam 58 by spring The lower end of lever 62 is connected to crank 65 of the rotary portion of valve 5'? by link 67. In the position shown in Fig. 56 valve 5''? in its normal position with roller 6 2 bearing upon surface 61 of cam 58. Air is being drawn into ehzunber 56 between plate 68 and shelftit) through conduit 70 which has open-- ings in shelf I When passage 3i in inen'iber' 3f chamber 39 the suction in chamber 32, and hence within shaft 28. will cause air to be drawn in through the holes lO in feed roll 41 as they pass chamber 39. This ac o Clluv c1011 causes the uppermost sheet of paper to be advanced towards and over rollers "2 on sha 17. This feeding action of the one sheet of paper may continue as long as passage 3-1 in member is opposite chamber 39 or until the vacuum in chamber is broken. It is desiraljile to delinitely limitthe distance of feed of a sheet of paper and inorder to insure the discontinuance of the feed at a time C6li"-1l1, l make the sheet of paper being fed control the time of breaking of the vacuum in chamber 32. This function is performed before roller 6 1- leaves cam surface 61 and when valve 57 is in normal position Figs. 8 and 9. As soon as the sheet of paper being fed reaches the openings in shelf 69 opposite conduit 70, ther admission of air will be prevented and the increased suction in chan'iber 56 will cause piston 74 and link 75 to be drawn downwardly. The

\ ally mounted to its outer end a rod 93.

upper end of link is pivotally connected with the end of arm 76 which is secured to shaft 38. Also secured to shaft 38' is an arm 7 9 which carries a spring pressed valve that covers the end of conduit 31 during the advance of a sheet of paper by the feed roll. The action just described occurs one operation and the removal of valve 80 from its normal position permits air to be admitted into chamber 32 and relieve all suction at the feed roll. Sometimes thereafter passage 34 in member 35 will pass away from a communicating relation with chamber 39.

As shaft 28 turns in a clockwise direction, F ig. 8, roller 64: is cammed outward to an in terinediate position on surface 60 and valve 57 is thrown to the position shown in Fig. 10. This position of the valve discontinues communi *ation of chamber 56* with conduit 70 and the sheet of paper on shelf 69 is freed from the restraining influence of suction. At just about this time. cam 81 on shaft permits anti-friction roller 82 to drop off of high surface 83, Figs. 3, 8 and Roller 32 is mounted on the end of arm 8-1 which is socured to shaft 85, Figs. and Also secured to this shaft are two arms 813 617. each of which carries a friction wheel 88-89, respectively. lVhen these friction rollers drop, they press the paper against rolls 90 and 91 on shaft 21 and the forward movement of the paper is continued. \Vith valve 57 in its intermediate position, Fig. 10, the vacuum in chamber 56f maintains piston 7 .1 in a downthat the vacuum is broken in chamber 50 and piston T l is permitted to raise to its normal position. For the purpose of raising the piston, a crank 92, secured to sha ft 33, has pivot- Rod 93 slides within a hole in stud 941 against which spring 95 abuts. This s 'iring is com prised between stud 9e and a collar on rod 93 thereby creating a tendency to restore shaft 38 to normal position. Yl'ith shaft 38 in normal position, valve 30 discontinues-- com munication of conduit 31 and chamlu-r 32 with the atmosphere. The full force of the suction is now existent in conduit 31 and chamber 32 and when passage 34- in member 35 again comes into communication with chamber 39, another sheet- 0 1 paper will be fed forwardly in the manner just described.

lVith valve 57 in the position shown in Fig. 11; air may be drawn through chamber 56 either through conduit 70 or through port 71. W hen roller (11 is lwllllltlitll to descend to surface 61 of cam 00. it will cause \alv be displaced to its normal position,

with chamber 56 in direct communieation with conduit 70. WVhen the next sheet is picked up and fed forwardly by the feed roll 11 the cycle of operation just described will be repeated.

Should more than one sheet of paper he passed along at one time, mechanism is pro vided for releasing the sheets from contact with suction wheel 11 when they arrive over rollers '72 on shaft 17 and thus stop their forward progress. In regard to the mechanism provided to accomplish this result, attention is directed to Figs. 2, 3, 5, 6, 8, 16, 17, 18 and 19.

As best seen in Fig. 16, a U-shaped casting 96 is mounted on rod 15 and it has a boss 97 through which passes shaft 38. To the lower branch of casting 96 is bolted a mounting 97 for a pulley 98 pinned to one of the rollers 72 on shaft -17. F astened to the under side of the upper arm of casting 96 is a bar 99 which supports plate 68. This plate has an opening 97 large enough to permit a portion of suction wheel 11 to extend so that it may pick up a sheet of paper and advance it over rollers T 2 and beneath plate 68.

To one side of plate 68 and immediately over pulley 98 there is pivotably mounted a sector 100 at the rear end of a lever 101 supported on a stud 102 on boss 97. This lever is drawn by a spring 103 in a counter-clock wise direction (Fig. 17), and its position of rest is determined by a thumb-screw 104 which bears against the boss. This lever is in an adjusted position when a clearance of the amount equal to the thickness of one sheet of paper exists between pulley 9S and sector 100, Figs. 16 and 17. Should two or more sheets attempt to pass between pulley 98 and sector 100, the sector would he swungcounterclockwise, Fig. 18, until stud 105 contacts the lower end of lever 101. Such movement would cause stud 106 to contact arm 107 and swing it about its pivot 108 and remove arm 109 from under arm 11.0 which is loosely mounted on shaft 111. Arm 110 overlies a lateral extension of arm 110 secured to shaft 111 and its Weight will cause shaft 111 to be rotated as soon as the high part of earn 112 on shaft 28 has passed from under roller 113 rotatively mounted on arm 110. The position of cam 112 on shaft 28 is such that the action just described will occur just after the sheets of paper strike sector 105 and rotate it so as to cause arm 109 to be removed from under arm 110.

As shaft 111rotatesclockwise valve llel carried on arm 115, fast to its left end. will be removed from over opening 116 thereby breaking the vacuum in chamber 32 and terminating the effectiveness of suction wheel 11 so that it will no longer be able to advance paper. The opening movement of valve 111 occurs before valve 80 would operate in the operation of the machine and it remains open ."finger121 willbe srotated to a posi 1'09 assumes its normal position of suppor as shown in Figs. 8 and 17 with the under surfaceot arm 107 bearing against shaft 58.

It is apparent that handle 117 can be rotated to remove valve 111 to break thevacnum in chamber 32 whenever desired.

In order to keep rollers 88-89 from descending until the obstructing sheets of paper have been removed, the followingmecha- :nism'is provided. Fastenedto shaft 111 .is a crank 1318 to which is pivotally connected a rod 119. The forward end of ti 's rod is pinned to arm 120 which has integral therewith a linger 121 pivoted on astud. A the valve cap .isimoved from its normal po tion under linger 122 which is secured .to shaft thus prevent the rollers from descending whenrthe high surface of cam 81 moves from under roller 82 on arm 8 1 as has been de scribed hereinbefore.

The papeivtable.51n1ay be moved upward or-downward bythe rotation of shaft 123 and a crank handle 12lisprovided at its right end for this purpose. This. shaft is mounted in side frames 10-11, and carries two worms .125126,-one of which engages a worm Wheel 1127 and the other of which engages a worm wheel 128 mounted on

shafts

129 and 130 spectively. Shaft 129 is parallel to frame 10 and is journaledon brackets extending therefrom. At its rear end is mounted a sprocket wheel 131 over which a chain 132 passes and to its forward end is securedanother sprocket wheel 133 over which. .a. chain 134; passes. Likewise, shaft 130 is parallel to frame 11 and is journaled on brackets extending therefrom. At its rear end is mounted a sprocket wheel 135 over which a chain 136passes, ant to its forward end is secured another sprocket wheel .137over which achain 138 passes.

,The inside ends of chains 132 and 136-have connected thereto loops 188 and into each of which entendsithe one of the ends ofthe central. flange of a T-beam 1 10. The forwardchains 1-3 1 and 138 have connected to their lower ends, loops .1411 and 1&2 respectively whichsupport the ends of T-beam 1 1-3. Table 51 rests upon the Tbeams and :i height is varied by movement of the-chains when shaft 123 is rotated.

ihe free ends of the chalns are steadied by weights.

The forward end of the table contaetsbars 14:4; a ainst which the sheets of oaoer are a: I l l mechanism is provided for raising the table automatically whenever the top sheet of the pile of paper becomes lowered a definite distance from the face of the suction wheel.

This mechanism comprises a pawl 1.51pivotally mounted on pin 152 extendin from bellcrank 153 loosely mounted on shaft 123. Pawl 151 is held. in an engaging relation with the teeth of ratchet-wheel 1 by a spring 155 secured to a collar on pin 156 which passes through a hole in stud 157.

Pivoted to the upstanding arm of hellcrank 153 is alink 158 which is supported at its forward end by a slot connection with pin 159 extending from a bracket on frame 11. This link is continually urged rearwardly by a spring 160, but, ordinarily, such movement is prevented. by an man 161 which engages a shoulder The arm and a counterweight 163 are pivoted on a shaft 16% which is jouraled at the right end in frame 11 and at its left end in a member 165 which is supported on

bars

18 and 19. Fixed to the ,leftend of shaft 64; is a crank 166 from which a pin 16'? extends. The forward end of member 165, Figs. 5 and 6, carries a pin 167on which a collar 168 is mounted. A roller1'69 is to tatively mounted on a pin passing through yoke 170 ext-ending forwardly from said 001- lar and an arm 171 is securedb a screw 17 2 m .V lhe upper end of arm 171 within a fork 173. is forkedso as to engage pin 167 on crank 1-66 and thereby cause shaft 164; to be rotated counter-clockwise, Fig. when crank 170 rotates clockwise as the paper is gradually removed from under wheel 169. vVhen a deiinite amount of paper has been removed from under the roller, the forward end of arm 161 and cause pawl lfil tohe movedback idly over a toothof ratchet-wheel 15 1.

On. the outer side of frame 11 there is mounted'to turn on stub shaft 174 a bell-crank having an arm 175 in which is disposeda slot 176. A pin 17? extends from gear 2? into this slot and causes a complete :oscillation of the bell-crank onevery revolution of shaft 28. A pin 178 extends from link and engages a slot 179 in upstanding arm 180 of the bell-crankQ This slot is of sufiicient length.

so as not to engage pin 1Y8 when the bellcrank is oscillated during the ordinary operations of shaft 28 when arm 161 abuts shoulder 162, but when arm 161 has escaped from engagement with the shoulder in the manner above described, and ratchet 151-1128 engaged a tooth to the rear of its usual position of rest, the rear end of slot 179 will engage pin 1T8 and return the link 158 to its usual position, when hell-crank 175-180 is again. 05

cillated. Arm 161 will then return to its locking position.

When link 1558 is thus being restored to its normal position, ratchet 151 will rotate 'atchet-wheel 15% and rotate shaft 123 to cause table 51 to be raised the required distance.

lVhile the form of mechanism herein shown and described is admirably adapted to fulfill the objects previously stated, it is to be understood that it is not intended to confine the invention to the one form of embodiment herein disclosed, for it is susceptible of embodiment in various forms allcoming within the scope of the claims which follow.

What I claim is 1. A paper feeding device comprising a rotary roll with suction paper-holding perforations therein, suction controlling means within said cylinder comprising coacting stationary and rotary elements with ports therein cooperating with each other and with the perforations in said rotary roll as the latter pass the port in said stationary element.

2. In a machine of the class described, the combination of a rotary member having a passageway therein, another rotary member having perforations, a member intermediate said two rotary members, said member having a channel adapted to communicate said passageway and certain of said perforations, means to evacuate air from said passageway and through said perforations, a valve covering an opening from said passageway, and means to control the opening of said valve to terminate the eflectiveness of said last named means.

3. In a machine of the class described, the combination of a rotary member having a passageway therein, another rotary member having perforations and adapted to rotate at a greater rate of speed than said first named rotary member, means including a channel bearing member whereby air is drawn through said passageway and perforations, and means to cause the cessation of the infiltration of air through said perforations.

i. In a machine of the class described, the combination of a rotary member having a pasageway therein, another rotary member having perforations, a member intermediate said two rotary members, said member having a channel adapted to communicate said passageway and certain of said perforations, means to evacuate air from said passageway and through said perforations, a valve covering an opening from said passageway, means to open said valve, and means operated by said first mentioned rotary member to control said last mentioned means.

5. In a machine of the class described, the combination of a rotary member having a passageway therein, another rotary member having perforations, a member intermediate said two rotary members, said member having a channel adapted to communicate said passageway and certain of said perforations, means to evacuate air from said passageway and through said perforations, a valve covering an opening from said passageway, means to open said valve, and means controlled by said first mentioned rotary member to operate said last mentioned means at a predetermined time.

6. In a machine of the class described, the combination of a rotary member having openings in its exterior surface, a hollow member mounted within said rotary member, said hollow member having a channel, means to actuate said rotary member in relation to said last named member, means to draw air through said openings and said channel, said means including another rotary member having a passageway, and means to control said 'drawin of air during a definite portion of the cycle of said last named rotary member.

7. In a machine of the class described, the combination of a rotary member having openings in its exterior surface, a rotary hollow member driven at a different rate of speed than said first mentioned rotary member, means to actuate said rotary members at speeds of lined relation to each other, a member intern'iediate said two rotary members, said member having a channel, means to produce a suction through said openings, channel and said rotary hollow member, and valve means to terminate the duration of said suction.

8. In a machine of the class described, the combination of a rotary member having openings in its exterior surface, a rotary hollow member mounted within said rotary member, a member having a channel adapted to communicate certain of said openings and said hollow member, means to maintain a vacuum in said hollow member, means to allow communication of said hollow member with the atmosphere, and means to control the operation of said last mentioned means during predetermined periods of rotation of said rotary member.

9. In a machine of the class described, the combination of a hollow shaft, a member mounted on said shaft and having a passage way communicating with the hollow space thereof, an annular member having a chamber therein alternately communicable with said passageway, a wheel having a perforated flange adapted to slide by said chamber, and means to rotate said first named membe and said wheel relative to said annular member.

10. In a machine of the class described, the combination of a hollow shaft, a member mounted on said shaft and having a passageway communicating with the hollow space thereof, an annular member having a chamber therein, a wheel having a perforated flange adapted to slide by said chamber, and means to rotate said first named member and said wheel relative to said annular member so as to bring different perforations in said flange opposite Said chamber during a sine glerevolution of said first mentioned member. 11. In a machine of the class described, the combination of a hollow shaft, a member mounted on said shaft and having a passageway communicating with the hollow space thereof, means for rotating said member, a member. surrounding said first named memand having a. chamber therein, a wheel h n a perforated flange and adapted to be ota d: bout said second. named member and chamber, and. means for rotating said wheel at a different rate of speed than said first named member SO as to. present different groups of perforations opposite said; cham: her on each succeedingcommunicationof said. passagewaywith said chamber. 12.11; a machine of the class described, the combination of: a suction wheel having per: forations, a chamber. having communication with said suction wheel, means. rotatable within said suction wheel and having a passageway "for. suctioning air through the perforatl011s into. said chaml ier, and an inner member disposed, between. said suction wh and said means having a channel forv causing commun cat on between certain oi said suctionwheel perforations and said passageway in saidrneans.

1 In a machine of. the class described, the combination. of a suction wheel having perforations, means to cause certain of perforations tobe effective during the rotation ofsaid suction Wheel, a chamberhaving-come munications with said suction wheel, a valve f r Said chamber, and pneumatically con; trolled means to operatesaidvalve at'a oer:

. tain time related to the rotary position of phere, pneumatic. means to displace said valve, and means operable at apredet-ermined.

pointlon the rotation otsaid feed. roll :for ren dering saidipneu natic means effective.

. 1.5. [A paper feeding device. compris ng in i combination with a cylindrical feed-roll pro vided with a plurality of perforations,

through which suction may be induced to hold the paper. to be fed against the cylinder, a conduit connected with said feed roll for drawing air: therefrom, a valve closing the end of sa-idconduit, means to operate said valve, and penumatically controlled means to render said operating means effective to operate said valve and to allow said operating means to be returned to its normal posi: tion for closing said valve.

16. A paper feeding device comprising in conibinationwith acylindrical feed roll pro: vided with a plurality of perforations through which suction may be induced to hold.

the paper. to be fed against the cylinder, a conduit. connected wlth said feed. rolhfou drawing an: therefrom, a valve closing. the

end of said conduit, and automatic n1eans,c n.-.

cock for displacing said valve from its closed position,andmeans to control the operation of said last mentioned means. to displace said.

valve from its closed. position.

18. A paper feeding devieecomprising in combination with a cylindrical feed roll pro: vided with a plurality of perforations through which suction may be induced to holdthe paper to be fed against the cylinder, a conduit.- connected With said feed roll for drawing air therefrom, a valve closingthe end of said conduit, means to maintain'said valve in a closed position, means including an air cock for displacingsaid valve, means to eontrolsaid last mentioned means to dis:

place said valvefroinits closed position, and

to permit said first. mentioned means to re-.

turn said. valve to closed position after the.

shee of: Pap r h le 5c P dly sa d feed roll;

feed roll havingpaperi holding suction ports thercin,a conduit. connected with roll for drawing air through suction ports, a valve covering a poi-tin said conduit, and means. for causing said valve tohe dis:

placed from said port, Saidlast named means. includi g a valve for-controlling "he position of said. first mentioned valve 1111.11 the sheet.

of paper has heendisposed of.

In test mony whereof I hereto aflix my. sig:

nature.

TALBOT G; DEXTER of. perforations,

said feed V 19. A paper feeding" devicecomprising a