US1994613A - Sheet-handling device in bookstitching machines - Google Patents

Description

March 1 9, 1935. l o. KLElNscHMlT Erm. 1,994,613

- SHEET HANDLING DEVICE IN BOOK STITCHING MACHINES Filled Jan. 26, 1952 5 Sheets-sheet, l

March 19, 1935. \Q. KLElNscHMlT- Er AL 1,994,613

v SHEET HANDLING DEVICE IN BOOK STITCHING MACHINES Filed Jan. 2e, 1952 45 Sheets-sheet 2 o l I Z150' fa rn- Manx-ch 19, 1935. o. KLElNsczHMlT4 r-:rAL 1,994,613

SHEET HANDLING DEVICE IN BOOK STITCHING' MACHINES Filed Jan. 26, 1932 5v Sheets-Sheet. 3'

A 66,15/ lNvENToRs OSCAR KLEINSQHM'IT -RunoLF KLEM By M ATToRA/.ey

March 19, 1935. .1AKYLE1N'scHMlTvE-r AL SHEET HANDLING DEVICE IN BooK STITCHING MACHINES Filed Jn. 26, 1932 5 Sheets-Sheet 4 INVENTDRS W@ M H G 5 NM uw LK K Rw .0 MD 5u OR SMLQ 05h/MLM@ ATTofP/Vfy March lv9, 1935. o. KLElNscHMlT ET AL 1,994,613

SHEET HANDLING DEVICE IN BOOK STITCHING MACHINES Filed Jan. 26, 1952 5 sheets-sheet 5 Patented Mar. 19, 1935 Liitiii PTE ' SHEET-HANDLING DEVICE IN BOOK- STIA'ICCHING MACHINES Oscar Kleinsch'mit and Plagwitz, Germany,

Runen Klemm, Leipzigassignors ,to Gebruder Brehmer, Leipzig-Plagwitz, Germany, a limited partnership of Germany application January 26, 1932, Serial No. 589,012 In Germany February l1, i331- 28 crains.

The present invention relates to book-stitching machines and is'more particularly concerned with the provision of means for retaining, pressing and registeringsheets or book-sections upon the saddle conveyor ofa book-stitching machine of the swinging sheet-carrier type.

When sheets are fed manually to a stitchin machine of, the above type during the operation thereof, the said sheets are pressed upon the sad- '.dle ci the sheet carrier by the hand of the operator and so held thereon until they are conveyed to beneath the stitching means. mechanical sheet feeding means arev utilized, it is not possible to retain and register the sheets upon the sheet carrier in this manner. Y

According to the present invention means are provided for mechanically pressing, registering and retaining upon the swinging sheet-carrier of a book-stitching machina a folded sheet or the like placed straddlewise thereon.

This invention may be carried into effect by mechanism whereby suitable blade springs or similar members are caused to bear upon the fold ofthe sheet carried by the sheet-carrier, the blade springs being adapted, in addition to'making a downward movement for the purpose of effecting the detaining pressure' upon the sheet, to perform a traveling or smoothing movement over some part of the sheet in order toiorce the fold of the sheet into the effective stitching position and also to retain it against displacement from .this position. The springs may be aided in effecting the registration of the sheet by a preferably rubber-faced rolle:V which `is caused to upon the sheet a laterally acting force in addition to the downwardly acting force above described. The sheet may thus be drawn against a suitably positioned lateral st op and so properly registered upon the sheet-carrier prior to the stitching operation.

In order that the invention may be more clearly understood, vone constructional embodiment thereof will now be described in reference to the accompanying drawings in which:

1 is a part sectional side elevational view When (Cl. 11B-21) of an automatic'sheet feeding unit constructed according to this invention and shown associated with a book-stitching machine of the swinging sheet carrier type but with certain operative parts removed for clearness.

Fig. 2 is a plan view of the sheet-feeding unit. Fig. 3 is an enlarged side elevational View of part of Fig. 1. Fig. 4 is a vertical View taken on the lineIV-IV of Fig. 1 also to an enlarged scale.

Figs. 5, 6 and 7 are detail views of various operative positions `of the sheet retaining device, and Fig. 3 is a diagrammatic view showing. an alternative arrangement of the sheet-registering roll. i

f Referringtc Figs. 1 and 2the sheet-feeding unit includes a frame 10 positioned adjacent the swinging sheet-carrier 11a the latter forming part of a book stitching machine 11 of known type. Inversely rotating sheet-opening Yrolls 13, 13a are arranged kover the path of travel of the sheet-carrier 11a and are suitably supported by slide members 20 carried in guides 60 xed to or forming part of the main frame l0.

The slide members 2G are connected by a u Friend crosspiece a and movement is imparted thereto from a cam 31 mounted on a driven shaft 32 journalled in the main frame 10, by way of bell crank lever 33 pivoted to theframe 10, and link member 15. The shaft 32is in driving connection with the drive shaft of the stitching machine 11 through the Vgear train 61, and the contour of the cam 31 is such that the slide membersZU and the sheet- opening rolls 13, 13a carried thereby are caused to move and register Ywith the sheet-carrier 11a during all or part of its operative stroke. Y

The sheet-opening rolls 13, 13d are of the known suction-operated type wherein suction is applied to sheets passing therebetween by means Aof a series of ports 13b under the control of valve chests 62 from suitable flexible suction conduits 63 connected to any suitable pump or other source of suction.

In order to feed the sheets the rolls 13, 13a are rotated either continuously or in an oscillatory manner by means, as shown in Figs. 3 Vand4, comprising an arcuate' rack 64 pivotally -journailed at 64b in one of the slide members20 and engaging a pinion 65 xed to the shaft supporting the roll 13a. The arcuate rack 64 to the further side or" its pivot 64b is provided with a slotted extension 64a to which is adjustably connected at 66a one end of a link 66 arranged to be operated by a suitable cam (not shown) fixed to the shaft 32, the extent of rotation of the suction rolls 13, 13a being adjustable and predetermined according to the size of the sheet to be handled by the appropriate positioning of the connection 66a of the link 66 in the slotted extension 64a of the rack 64 wherever the extent of angular movement of the rack 64 is varied as desired.

The roll 13 is driven by way of `the gear train -67 from the roll 13a so as to rotaterin an inverse direction to it and thus to open sheets fred therebetween by the conveyor bands 68, and in order to facilitate the entry and correct positioning of the sheets the rollr13" is carried by afslicle member 69 supported in guides 70 flxedto or forming part of the slides 20 and -is arranged to be separated from the roll 13a by means of cams 71, actuated by link mechanism 72 from a'cam (not shown) carried by the shaft 32.

' In this arrangement of the machine the sheet opening rolls are set todeposit the fold of each opened sheet above the apex of the swing sheetcarrier 11a and somewhat to the left thereof as viewed in Fig. 3.

The slide 20 also servesV to support the sheet retaining member or members and the sheet registering device or devices all of which members therefore move with the sheet opening rolls during the operative movement'of the latter. i

.The sheet-retaining members each comprise a bifurcated blade spring 12 preferably Vcurved at its free extremity and secured to a curved arm 21 provided with an arcuate slot 21a. A supporting bracket 22 secured to the cross-piece 20a carries a guide pin 23 which engages in the arcuate slot 21a of the curved arm 2.1forthe purpose hereinafter described.

l Auxiliary movement is imparted to the sheet retaining spring or springs 12 by a cam 25 mounted on the driven shaft 32 and engaged by a cam follower carried by a pivotal. lever 26. The latter is connected by `means of the rod 27 to a two-arm lever 28 the arm 29 of which is pivotally connected to an extension of the curved lever 21. Movement is thus imparted to the sheet-retaining spring 1,2 and the latter is guided in its movement by the guide pin 23.

The sheet registering device comprises a preferably rubber-faced pull roller 14 which is adapted to engage each sheet and register the fold thereof with the apex of the sheet carrier and is journalled in the bearing arms of a rocking lever 37 the latter being freely pivoted intermediate its Ylength on a pivot 22a supported by the bracket 22. An auxiliary arm 37a, Fig. 2,

also freely mounted on the pivot 22a is providedv with a lug 37b which is adapted to engage the lever 37 and so control the balance of the latter which normally tends to allow the roller 14 to contact with the sheet straddled on the sheet carrier. VRocking motion is imparted to the arm 37a from a cam 34 mounted on the shaft 32 and engaging a cam follower carried .by a pivotal lever 35, the latter being connected `to the varm 37a `by means of the rod 36 which is linked thereto.

Rotary movement is imparted to the roller 14 inthe following manner. A shaft 40; journalled in the machine frame 10 and driven from the shaft 32 by means of a belt `drive 40a, carries a bevelgear wheel 39. The pivot vupon which the roller 14 is journalled comprises a' stub shaft 42 linkedby means of aiuniversal joint 43to-a similar stub shaft 44 which carries 'a bevel gear 45.

Thevlatter is placed in driving connectionV with the bevel gear 39 by means ofthe interengaging bevel gears 46, 46d mounted on the connecting shaft 47. The interconnecting drive above described is arranged to be freely movable in accordance with the movement imparted to the i slide member r20 vand the"intermeshing bevel gears are held in engagement by suitable bearing brackets 73, 74 associated vwith the upper y and lower ends of the shaft 47, respectively.

The operation of the' sheetV feeding device is as follows:

A closed, folded sheet to be deposited straddlel' wise on the swinging sheet carrier 11a is fed to the sheet opening rolls 13 by conveyor bands 68 and is opened as shown in Figs.Av 1, 2, 3. and 4 by reason of the rotation imparted to the rolls 13,

13a by the arcuate effect incertain of the Yports l l 13b thus causing the leaves of the sheet to split apart. lDuring the subsequent associated movement of the vswinging sheet carrier 11a and the rolls 13 the opened sheet isY deposited upon the to'one sideof the apex of the saddleY as above Y.

guided by the pin'23, the member v12assumesjat this point of the operation the positionjshownin y Fig. 3. f

In this position the sheet-retaining sprin-gu comprising the member 12- presses 'onthe sheet in the proximity ofits fold vand lholds itr firmly but yieldingly upon the apex oftheJ sheet carrier.V Y,

At this moment the pull rolleri14,VVV controlled by the lever -37a'from thecam`34 asr above described, is permitted to descend untilv the frictionV surface thereof engages withv slight pressure against the corresponding lsidefof the 'sheet-carrier the adjacent. surface ofthe straddled sheet. The directionof rotation of the roller 14 is as shown vby the arrow d and thus the j,sheet en- .f gaged by the roller 14 is pulled downwards untilA f the fold thereof rests snugly against the apex of the sheet vcarrier 11a as shown Vin Fig. 4.` The fold, upon reaching the apex ofthe vcarrier sadlv dle, is prevented by the retaining spring or springs 12 from lifting or travelling beyond the4 apex.4 j

Itwill be appreciated 'that the 'sheet engaging and registering part `of the operation 'takesyplace y when the sheet-carrier is at the commencement of its forward or sheet feeding stroke which ter- 'Y minates beneath vthe stitcher 'headsof the stitching machine V1l.

While the sheet registering or pull roller 14,

afterregistering the sheet upon the carrier 11a, is caused by the continued rotation of the cam 34 to swing away from the sheet as shown in Fig.

v5, the retaining springs 12 remain in the sheetengaging position and move-forward with the sheet-carrier 11a until the latterin completing f its forward feeding stroke has moved upwards and forwards as Aindicated by the chain-dotted position of the carrier shown in Fig. 5; Thus,

' the auxiliary movement of the 'members 12 is enhanced somewhat in order to contact the springs with the sheet for the longest period practically possible during the feedingmovement ward feeding movement of the sheet-carrier the apex of the latter Atogether with the fold of the.

sheet thereon slides yfrom beneath the now/sta-l correct registration `ofthe sheet .fold'with the apex of the said sheet carrier.` j v Referring to Fig. 8, an alternative arrangement of the sheet registering device is shown. The saddle of thesheetcarrier 11a is, provided with a preferably adjustable lateral stop G and the registering roller 51 issetobliquelytov the longitudinal vapical line of the carrier saddle.

When in engagement with a sheetcarried by the saddle it is obvious that the pullV on the sheet exerted by the roller 51 will be in a direction also oblique to the apical line Jof .the sheet-carrier sogthat the sheet will simultaneously be registered with one lateral edge thereoic against the lateralstop 50 and its fold against the apex of the sheet-carrier. n

, The position of the sheet-retaining springs in this embodiment of the invention maybe as described in reference to the first embodiment or, if desired, parallel to the sheet registering rollers 51. l

In the above description the components comprising the sheet retaining, pressing and registering means have been referred toas single members, but it will be understood that in practice a plurality of such members may be embodied in one machine for the purpose set forth.

The mechanism, by means of which the above invention may be carried into effect, is not necessarily confined to that above described, it being obvious that many variations of such mechanism maybe devised while remaining within the ambit of the invention as, defined in the appended claims. Y

v 1. In a book-stitching machine of the swinging sheet-carrier type, a sheet retaining device, means for engaging said device with a folded sheet placed straddlewise upon the sheet carrier,

avrotatable friction roll adapted to engage said sheet and means for rotating said roll whereby the fold of the sheet is drawn down upon the apex of the said sheet-carrier.

2. In a book-stitching machine of the swinging sheet-*carrier type, a sheet retaining' device, means for engaging said devicewith a folded sheet placed straddlewise upon the sheet oarrier, a sheet stop provided on said carrier, a rotatable friction roll adapted to engage said sheet,

and means for lactuating said friction roll,

whereby the fold of the sheet is drawn :down onto the apex of the sheet carrier andthe edge of `the said sheet registered against the said sheet stop. v

3. In a book-stitching machine, sheet handling means comprising a saddle-shaped swinging sheet-carrier, a pivotally mounted rotatable friction roll adapted to engage said carrier or afolded sheet laid straddlewise upon said carrier, means for withholding the roll when desired from contact with the vsaid carrier, means for rotating the said roll to drawthe fold of the sheet down upon the apex `of the said sheet-carrier, and means whereby the said roll is moved with fthe sheet-carrier duringV the operative movement of thelatter member. l

4. In a book-stitching machine, sheet handling means comprising a saddle-shaped swinging sheet-carrier, a lateral Vsheet `stop provided on said sheet-carrier, a pivo'tally mounted rotatable friction roll set at an angle to the apical line of saidsheet-carrier and adapted to engage a folded sheet placed straddlewise thereon, and vmeans for rotating said roll to draw theV fold of thesheet` down upon theapex of the said-sheetcarrier and register one yedge thereof withsaid lateral stop.

,5. Ina book-stitching'machine', sheet-handling meansl comprising a saddleshapedv swinging sheet-carrier, a lateral sheet stop provided on said' sheet-carrier, a pivotally mounted rotatable associated with said sheet-carrier andadapted toVV deposit a folded sheet thereonwith the fold of said sheetto one side of the apex of said carrier, means for registering said sheet fold upon the apex of sheetV retaining device to engage the registered sheet during a part of the travel of the'said sheetcarrier. A

vsaid sheet-carrier, and means for actuating said 7. vIn a book-stitching machine, in com bina-` f ating said sheet retaining device to engage said registered sheet during part of the travel of said carrier. v i

.B In 4a book-stitchingmachine, in combination, a saddle-shaped swinging sheet-carrier,` means for depositing a folded sheet straddlewise upon said carrier,sheet retaining members associated with said sheet-carrier, means for engaging said sheet retaining members with the fold of va sheet placed on the sheet-carrier, a sheet registering friction roll associated with said sheet retaining members, means for `engaging said roll with the said sheet, means for rotating said roll to draw-the fold of the sheet down upon the apex of saidv sheet-carrier .and means for timing vthe actuation of the said sheet-handling means in accordance with the normal operation of the said stitching machine.`

9. In a book-stitching machine, in combination, a saddle-shaped swinging sheet-carrier, means for opening afolded sheet and depositing same straddlewise upon lthe said sheet-carrier, a movable sheet retaining blade spring associated Vwith said sheet-carrier, means for supporting said blade springindependently of said sheet-carrier, means forv imparting movement to said blade spring relative, to the movement` of said sheet carrier, a pivotally mounted friction roll associated withsaid sheet carrier and adapted to engage the sheet placed upon said carrier, means for controlling the `contact of said roll with said sheet, means for imparting rotary movement to said roll Vto draw the fold of said sheet down upon the apex of said carrier, and means for imparting an auxiliary movement to said blade spring whereby the fold of the said sheet isA held down upon the -apex of the sheet-carrier duringV the operative movement thereof.

10.1.,In a book-stitching machine, incombinasheet-'carri'enat iea'st 'one sheet `f1"egistering fric--Y tion rol'l adapted to` engage the sheet p'laceitl Vupon said `cari-ier, means for imparting 'mo'v'en'ier'iitv to said roll relative to the operative movement=of said :sheet-carrier, means for rotating `said roll to `dra'vv the -fold 'of saidfsheet down upon Tt-he apex of Vsaid sheetlcarrier and means .fori :imparting Aauxiliary movement 'to said sheetere'taining iblade springs vvher'e'by they are ycaused t'to-engage and press 'upon 'the yapex 'of the she'et-(carrier ythe fold of the sheet registered thereon. l

11. -In a book-stitching m'achinegin 'combination, a .saddle-shaped swinging sheet-carrier, 'a lateral YsheetY stop on said carrier, inversely rotating sheet opening and feeding rolls adapted 'to place a vfolded s'heetstr'addlewiseuponsaid sheet- Cil carrier, means 'for imparting .ii'nea-r movement 'to said vSheet-feeding rolls relative 'to 'the 'operative movement of said sheet-carrier, -fs'he'e't retaining blade springs associated with sai-id 'sheet-carrier and-adapted to extend'over the'ap'eXhf Isaid sheetcarrier, means whereby 'said k'springs'fa're caused to move with said 'sheet-carrier during `'sorne 'part of 'the operative movement of 'the latter andhe'ld stationary during' 'the "completion of 'said operative movement, a sheet "registering fri'ction'froll mounted at an angle 'to the apicall lline =of1 the sheet-carrier and adapted to contact Withthe said sheet, means for rotating 'said ro'll 'whereby Y the said sheet is registered with thetapex of said carrier and the lateral stop 'provided tht-Sreon,and means' 'for ftiming mechanically 'the-operative sequence of said sheet-handling mechanism.-

12. In a 'bookst'itching machine, fa pivotal saddie-*shaped sheet-'carrier arranged to receive sheets s'traddletvise thereon, ia lsheet'-'retain'ing device 4'adapted yieldingiy to pr'e'ss a 'sheet' upon said carrier, and a sheet-regis'tering'device farranged to engage the sheet topnilthe '-'fold `rof the sheet against the apex of 'said-.oarrier.

13. In a hook-stitching machine, "a vpivotal sadd1eshape`d sheetecarrier, automatic #sheetifeeding means arranged to pilaceffoideds'heet's straddle'vvise -up'on said. carriena 'sheet-retaining device, means for causing' said device yieldingly to press the sheet Vupon 'said -carrier,-a sheet-registering device, and means 'for causing said sheetregistering device to engage the s'heetfthus to ipull the fold thereof against the apex of said carrier.

14. In a hook-stitching machine, "the combinationclaimed in claim 13, including 'means vforsulzvporting saidA sheeteretaining 'device' Asind 'said sheet-registeringV device independently of Vsaid sheet-carrier, and means for causing `saidsupporting means vto vmove in accordance with a part of the operative movement of said carrier.

15. In a book-stitching machine, la-'pivotalsaddle-shaped sheet-carrier, automatic 'sheetefe'eding and opening means arranged to place 'folded sheets straddlewise upon said carrier, a sheetre'taining 'device comprising a i'e'si1ient sheeten gaging member, meansrfor v'causing'said device yieldingiy to press vthe' 'sheet 'uponsaid carrier, 'a sheet-registering device, A"and 'means 'for causing @essere said sheet-registering device to .engage .thefsheet thus to pull the fold tl'iereof 'against the apex- 6! said carrier.

s'hee'tecarrier arranged to receive sheets 'fstrddlewise thereonfa 'sheeteretain'in'g 'member adaptedA AAyieldingiy Ito' press fa sheet upon 'said 'carriezgfa sheet's'to'p providedupon-said carrier, afsheet# eg;- isterin'g ide-vice arranged to fengagefthe 'sheet booth to pull fthefoid Vof the sheet against theapexof said'carrier, 'and register an edge' 'of the sheet against fs'aid sheet stop. i

17. In'fa book-Stitching 'machine, "ad'pivotlill` sheet-carrier, automatic slfeet'fe.eding vmeans are.

ranged toplace folded'fshee'ts straddlewise said carrier, a sheet-retaining device, fmean'sffor causing Isaid vdevice 'to' Apass I bet-Ween said #carrier and said sheet-'feeding fineans, and vmeans 'ffoi' causing said retaining device to engag the's'het to 'hold it upon said carrier during paritofthe operative movement'of saidcarrier.V

'19.111 a boek-Stitchingmachinea pivom sheet-carrier, automatic sheet-"feedingandopeni ing means varranged E'to 'piace folded -s'heetsstrad'- dleiv'ise upon said carrier, a `sheet-retaining de-V 1 vice, and means for causing' said device toFp'erform a movement relative to the movement fof saidshe'et-rcarrier, but independently thereof, -sro f,

as to pass lbetween fsaidl'carrier land said fs'he'e'tl feeding -and topening means Aand "press the sheet upon said carrier. Y

12'0. '11n abook-stitchingmachine,r the combinae moving said sheeteretaining device inY accordanceY with the movement of said carrier.

421. In a book-stitching machine, an pivotal saddle-shaped sheetcarrien automatic rsheet@ feeding means arranged zto place -folded sheets straddlewiseupon saidcarrier, 'a sheet-retaining device, means vfor engaging said-devicevvithwl sheet placed -upon said carrier-yieldingly to `hold..

it 'in place thereon, a sheet-registeringdevice, Y

means 'for causing VsaidYsheet-registeri-ng device to I'engage'A the sheet' and pull the "fold thereof against vthe apex vof said 4carrier,"a=nd means/forY causing said sheet-'retaining device v'and said sheet-registering Idevice 'to 'pass betweensaid cari'er and' said automatic Afeeding means the operative movement 'of 'the machine;

22. 'In a Itoo'k-sntehing maehmeapivetai saddie-shaped sliee'i'fecarrier,v lautomatic 'sheetv-feebdeA ing "means arranged to place folded sheets-stratidiewise 'upon Lsaid carrier, a` sheeteretaining de.

vice, a sheet-registering device, a 'sheet-'stop 'pro`` vided y,upon said carrier, v'means for causing 'said sheet-retaining device and Said tshee'tre'gistering device to pass between 'said carrier and' 'said feeding means, meansI for engaging said A'sheet-'Q retaining devicevvith a sheetj placedupon-said carrier fto yieidingly hold'it in position; and means for cansing Vsaid sheet-registering device'tovenf-Y gage'fthe sheet `f`both topull the fold'thereoi edgeof the vsh'eet'agains'tsaidcslieetstop; v j

tion claimed in claim *17, Yincluding means-fior i4() v.

,mf against the apex of said saddle 'and registeren s to engage the sheet and perform a sliding movement relative to the carrier, and to the sheet carried thereon to force the sheet into eiective stitching position and to retain the sheet against premature displacement.

24. A book-stitching machine, comprising in combination a pivotal sheet-carrier, automatic sheet-feedingV and opening means arranged to place folded sheets straddlewise upon said carrier, a sheet-retaining device, means for engaging said device with a sheet placed upon said carrier, a sheet-registering device, means for engaging said device with the sheet placed upon said carrier, means for supporting said sheet-retaining means and said sheet-registering means independently of said carrier, and means for moving said supporting means in accordance With a part of the operative movement of said carrier.

25. A book-stitching machine, comprising in combination a pivotal sheet-carrier, automaticl sheet-feeding and opening means, a sheet-retainl ing device, comprising at least one bladespring.

means for causing said sheet-retaining device to pass between said carrier and said sheet-feeding and opening means, and means for engaging said sheet-retaining member With the fold of a folded sheet placed straddleswise upon said carrier by said automatic sheet-feedingand opening means.

26. In a book-stitching machine, a pivotal sheet-carrier arranged to receive a folded sheet placed straddle-Wse thereon, a sheet-retaining device, and means for actuatingl said device to engage the sheet and perform a sliding movement relative to the carrier and to said sheet carried thereon to force the sheet into effective stitching position upon said carrier and to retain the sheet against premature displacement.

27.V In a book-stitching machine, a pivotal sheet-carrier arranged to receive a folded sheet placedV straddle-Wise thereon, a sheet-retaining device, means for actuating said device to engage the sheet and during such engagement to perform a movement relative to the carrier and to said sheet carried thereon, a sheet-registering device, and means for causing said sheet-registering device to engage said sheet to pull the fold of the sheet against the apex of saidcarrier.

28. In a book-stitching machine, a pivotal sheet-carrier saddle adapted to oscillate between the stitching station and the sheet-feeding station of the machine, a sheet-retaining device, means for moving said device over the apex of said moving carrier saddle to engage aA sheet placed straddlewise upon said carrier, a sheetregistering device, and means for causing said sheet-registering device to engage said sheet to pull the fold thereof against the apex of said carrier.

OSCAR KLEINSCI-IMIT. RUDOLF KLEMM.

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