US1624787A - Paper-feeding machine - Google Patents

Description

H. HALLSTREAM PAPER FEEDING MACHINE April 12, 1927. 1,624,787

y Filed Jan.16, 1924 3,.sneetssneet 1 Apnl l2 1927 H. HALLSTREAM PAPER FEEDING MACHINE v Filed Jan. 16, 1924 5 Sheets-Sheet 2 7i l A L j A Apnl 12 1927 H. HALLSTREAM PAPER FEEDING MACHINE 5 Sheets-Sheet 3 Filed Jan. 16, 1924 from ins Paten' Apr.. l2, 1927.

UNETE STATES HENNING HALLSTREAH, OF BROCKTONV, MASSACHUSETTS, ASSIGNOR TO CROSS FEEDER COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION 0F MASSA- CHUBETTS.

PAPER-FEEDI'NG MACHINE.

Application inea January 16., 1924. serial No. 686,528.

The invention relates to paper feeding machines which separate individual sheetsy from a. pile or bank and forward them in succession to a mechanism or machine for operating thereon.

The object of the invention is to provide a sheet separating and feeding mechanism of the suction feed wheel type which is well adapted for high speed operation in separating sheets of any size from a bank or pile and delivering them in regular suc cession to a folder or other -machine for operating upon the sheets. To this end the invention comprises features of construction and combinations of parts hereinafter des ribed and referred to in the claims.

The invention will be readily understood 'iection of the accompanying drawings an the following detail description of the mechanisms illustratedI therein.

ln the drawings Figure l is a vertical longitudinal section showing so much ot' a continuous paper feeding machine as is necessary toillustrate the application of the present invention thereto;l Fig. 2 is a sectional detail on line 2 2, Fig.l l; Fig. 3 is a sectional detail on line 3-3, Fig. l; Figs.

4 and iare vertical sectional "iews showing the arts at the front end of the feed table in different positions; Fig. 6 is a detail showing a part of the cut-out mechanism on a larger scale; Fig. 7 is a ver-tical section showing parts of the bank feeding mechanisln; and Fig.'8 is a detail sectional view of the suction nozzle and perforated rim of the feed Wheel.

In the drawings-the invention is shown embodied in a paper feeder lof the continu-l ous t pe in which a bank of feathered or faune out sheets are fed from an upper delivery table through a reversing throat and onto a lower feed table, the forward end of which is indicated at 2. The individual sheets are separated from the front end of the bank and resented to continuously acting delivery devices comprising the lower continuously rotating rolls 4 aludl the upper rolls 6 which are carried in arms 8 andare continuously pressed against the lower rolls by the springs 10.

4the pump or 'other mechanism for tween the delivery rolls or reaches a predetermined point, the suction through the' rim of the wheel is cut out or stopped and is again restarted asthe rear edge of the sheet passes from between the delivery rolls or beyond said point. By thus controlling both the stopping andstarting of the-suction by the sheet, sheets of any length may be separated and delivered in rapid succession. without requiring adjustment or re-- timing of'the separating mechanism for. different lengths of sheets. This feature of coi'itrolling, by the sheet, the throwing into and out ot' actiony of sheet separating devices which separate and advance individual sheets, is not confined in its application'tol machines in whiclrthe sheet separating devices comprise a suction feed wheel and suction nozzle and may be embodied with Aad.- vantage in machines in which other forms of sheet separating and advancing devices are employed.

In the construction shown, the suction nozzle is in continuous communication with l creating a partial vacuum therein and the suction through the rim is stopped or cut out by lifting the nozzle away from the rim and is re-started by returning the nozzle into position against or close to the inner sur 9U face of the rim. is shown, the 4nozzle is in the form of a box adapted to lit snugly agalnst the inner surface of the wheel rim and provided with a series of port holes 1 6 adaptedto register with rows of perforations 18 which extend substantially yfrom side to side of the rim, as indicated in Fig. 8. The suction wheelis secured to acontinuously rotating shaft 20 so mounted that the rim of the wheel is slightly above the forward end of the bank and the nozzle is carried on the end of a hollow lever 22 pivotally supported on a transverse shaft 24 and having its rear end connected through suitable pipe connections with a suction producing device.

The cut-out mechanism comprises a ratchet wheel 26 secured to the shaft 20 and a pawl 28 connected with the suction nozzle and movable into and out of engagement with the ratchet wheel. .The pawl is secured to a pawl lever 30, the lower end of which is pivotally connected to the suction nozzle and the upper end of which is arranged to he engaged by the rear end ot1 a rod 32. The rod is guided in a stud 34 and itsfront end is pivotally connected to one arm of a vhell crank lever 36, the other arm of which car ries the cut-out linger 38 which is arranged across the path vof the sheet. 'lhe lever" 36 is pivoted on thebracket 40 which also supports other parts of the cut-out mechanism and the lever is pressed in a direction to maintain the cutout finger in position across the path ot the sheets by a light spring` 42. lhe lower end ofthe cut-out finger projects into a grooved roll 44 which is secured to the shaft. which carries the lower delivery7 rolls 4 and as a sheet is advanced by the suction t'eed wheel, its trent edge is directed against the cut-out nger hy the grooved roll and rocks the cut-out nger so that the rod 32 swings the pawl lever 3() to engage the pawl 28 with the ratchet wheel 26. When thisA occurs, the tooth of the ratchet wheel which is engaged by the pawl acts to positively litt the pawl and through it the suction nozzle and thus cut out the suction through the rim of the wheel. rllhe upward movementof `the pawl lever brings a cam surface 46 on the upper end of the lever into engagement with a pin'l, so that the pawl is disengaged from the ratchet wheel. The' spring of the parts when the suction is broken by the forcible lifting of the suction nozzle tends to throw the part-s upward so that the pawl is readily disengaged from' the ratchet wheel. When the suction nozzle is lifted, it is retained in raised position 'by a trip pawl 50, the upper end of which is pivoted on the pawl lever 30 and the lower end ot' which is arranged to engage a trip pin 52 which is mounted inthe bracket 40. 'llhe trip pawl is acted upon by/a light spring 54 which tends to hold the lower end of the pawl either in engagement with the side (of 'the trip pin 52 or in engagement with a stop pin 56 on the bracket 40. The' sidel of the ltrip pin engaged by the pawl is attened or cut away as indicated by 'thel dotted section lines in Figure 6v and the stop pin '56 is so arranged with relation to the trip pin that as the pawl lever 30 is raised, the lower end of the trip pawl will swing in over the upper edge of the trip pin, as indicated in Figthat the suction nozzle is lowered into active fl' position. This movement of the cut-out tinger and suction nozzlebrings the offset upper end of the pawl carrying lever 30 into position to he engaged'by the rear end ot the rod 32, as indicated in Figure' Il, thus re-setting the cut-outmechanism. rThe connection between the cut-out finger and the trip pin Bft 52 comprises a link 58 connecting anarm 60l on the end ot the trip pin with an arm 62 on the rock shaft 6e which carries the trip nger lever 36.

'llhe front edges of the sheets at Athe torward end ot theba'nk rest against and are supported by upwardly inclined guide. tingcrs 66 and the upper sheet is raised into engagement with 'the rim of the 'iced wheel hy the action of air blasts directed hy nozzles 68 in an upwardly inclined direction against the trout edge ot the loa-nk. The air blasts also serve to ensure the separation ot the top sheet -from the sheets'heneath it when the top sheet is drawn against the rim of the wheel by the suction therethrough and also serves to wind the top sheet so that it may be readily removed from the bank and carried away by the delivery rolls.

The rloankot feathered' or tanned-out sheets is ted forward over the feed table hy feed tapes 70 which are actuated by feed mechanism controlled fromthe front end of the loank to'maintain it in propeerelation to the suction feed wheel as the tanned-out sheets are successively removed. rthe feed mechanism comprises a ratchet wheel 72 secured to the shaft 74 which carries the pulleys 76 tor the trent ends of the feed tapes and a feed pawl 78 which is given al feeding stroke only when the front end ot the bank is back of a predetermined point. The feed pawl is carried on one arln ot a lever 80 and is held i'nengagement with the ratchet wheel by a spring 82. The pawl carrying lever is acted upon by a spring 8l which acts to re tract the pawl when permitted to do so. Whenever the pawl isyretracted it is adw vanced to feed forward the vloank of sheets by a cam 86 secured to the shaft 20 and arranged to act on a roll 88 on the lever 80., The retractingmovementot the pawl is normally prevented by a pivoted pawl 90 which is arranged to engage a stop shoulder 92 onY the lever 80 when the cam rolhiridjes ol of the high part ot the cam land registers with the low part. The action oitythe `Stop pawl 90 is controlled by ,a finger 94 ihm 'no feed of the bank wil take place.

frontend of the bank recedes, the finger will below the front end of the bank and arranged to play through a slot in one of the guide fingers 66. The finger 94 is secured on a rock shaft 96, the outer end of which is provided with an arm/98. A rod 100 is pivoted to the arm and its rear end passes through a guide pin 102 and is so arranged that it may pass under the lower end of a i rod 104, the upper end of which is pivotally connected to the pawl 90. The controller finger 9-l is held against the front edge of the bank by a light spring 106 connected with the arm 98.

Each time the cam roll 8S passes onto the high part of the cam 86,v the pawl 9() is raised out of the notch 92, as indicated -in Figure 7, and at this time the rod 10() is free to pass under the rod 104 unless prevented by the engagement of the finger 94 with the front end of' the bank of sheets. So long as the frontend of the bank holds the finger in the position indicated in the drawings,

the pawl will be free to engage the notch 92 during each cycle of the machine and As the swing to the left in Figure 6'until the rod is moved to the left in Figure 7 sufliciently to bring it under the rod 104 when this rod is lifted as the pawl 90,1'ides out of the notch 92. When this occurs, the pawl .will be rendered inactive and the cam'roll 88 will be permitted to ride down onto the low part of the feed cam so that the feed pawl will be retracted into position to engage a. new tooth in the ratchet wheel 7 2 and will impart a feeding movement to the bank as the roll rides onto the high part of the cam. The feed pawl will continue to advance the bank during each.cycle until the controlling finger 94 is swung into. such position-.that the rod 100 is withdrawn from under vthe rod 104,'thus again rendering the pawl 90 active.

Thesuction feed wheel 12 and the def livery rolls 4' are driven at-the same snrface speed by gearing indicated in Figure 7 so that the suction feed wheel feeds forward the sheets at the same speed at which 'they are carried forward by the delivery rolls. The sheets are thus separated and delivered in rapid succession with one sheet following but slightly separated from the preceding sheet regardless of the length lof the sheets which are presented to the suction l feed wheel.

lVhile it is preferred to employ the construction and arrangement of parts shown and described in embodying the invention in a feeder of the continuous' type, it will be understood thatthis ,construction and arrangement is not essential to the broader features of the invention and may be varied or modified as found desirable' or best suited to the construction and mode of operation of the feeding mechanism in which it is to be embodied or of the mechanism to which lthe sheets are to be fed.

What isclaimed is.: 1. A sheet feeding machine having, in

`con'ibination, a suction sheet separating -device, and mechanism controlled by the'sheet for rendering said device active andfor rendering said deviie inactive.

t2. A sheet feeding machine having, in combination, a suction sheet separating device, and mechanism controlled by the front edge of the sheet for rendering said device inactive and controlled by the rear edge of the -sheetfor rendering it again active.

3. A sheet feeding; machine having, in combination, a sheet separating device, a cut-out finger arranged to be engaged by the suction sheet, cut-out mechanism thrown into operation by engagement of the front edge of the sheet with the finger to render the separating device inactive, and means thrown into operation by the disengagement of the linger by the rear edge of `the sheet fonrendering the sheet separating deviceA active and re-setting the cut-out mechanism.

4. A sheet feeding machine having, in combination, a sheet separating device including a nember vwhich is raised to render the device inactive, a pawl connected tu move with said member, a-ra'tchet traveling in a direction to lift the pawl and member when engaged by the pawl, a sheet operated cut-out finger' connected to engage the-pawl with the? ratchet, a trip pawl for holdingthe member .in raised position, and means for releasing the trip pawl to lower said member. 4

A sheet feeding machine-having, in con'ibination, a sheet `separating device including a member which is raised to render n the device inactive, a pawl connected to move with Said member, a ratchet traveling lmember in raised position, and means for releasing the trip pawl by the movement of the cut-out finger \vliendisengaged by the rear end. of the sheet.

6. A sheet feeding machine having, in combination, a sheet separating device 4in cluding a member which is raised to rende-r the device inactive, a pawl connected with the member, a ratchet wheel rotating in a direction to lift the pawl and member, a trip pawl mounted to move with the ratchet pawl, a trip pin for supporting the trip pawl. when'raised by the ratchet, and means for rocking the pin to release the trip pawl.

7. A sheet .feeding machine having, in combination, ,a sheet separating device inclucling a member which is raised to render' inn llfi

lift) the device inactive, a pawl connected With the member, a ratchet Wheel rotating in a direction to lift the pawl and member, a trip pawl mounted to move with the ratchet pa-wi., and a trip pin supporting the trip pa'wi Whenraised by the ratchet and rocked i by the cut-out finger.

8. A .sheet feeding machine haring, in conibirnition, a suction feed wheel having a perforeted rim, a suction nozzle within the rim over which it travels, means operated by thi` frontend of the Sheet advanced by the feed wheel for interrupting the suction through its rim, and means operated by the rear edge of said sheet for restoring the suction.

9. sheet feeding machine having, in combination, a snctioi'i feed wheel having a perforated rim, :t sin-tion nozzle within the r'n'n over which it travels, and sheet controlled mechanism for disengnging the nozzle from the rim to cut out the snci ion on the' sheet and for re-engaging the nozzle to restore the suction.

1t?. fheet feeding -m-rlchine having, in combination, a suction feed wheel having a perforated rim, means for creating a suction through the rini along its .sheet engaging element, sheet controlled nieans for rendering the suction inactivebn the sheet, and sheet controlled means for rendering the suction again active on the succeeding sheet.

11. sheet feeding machine having, in combination, asnction feed wheel having a perforated rim, a suctiony nozzle within the rim .over which it travels, .sheet controlled means for iiftingthe nozzle, continuously acting delivery devices, and means controlled by the rear end of the sheet presented to the delivery devices by the feed wheel for lowering the suction nozzle.

1Q. sheet feeding machine having, in

combination,r a suction feed Wheel having a I perforated rim, a suction nozzle vWithin the rim over which it travels, and 'mechanism controlled by each sheet for positively disengaging the nozzle from the rim to intermittently vcnt out the suction on successive sheets.

13n A. sheet feeding machine having, in combination, a suction feed wheel having a perforated rim, a suction nozzle Within the' rim over which it travels, a pawi connected with the nozzle, afratchet traveling in a direction to lift the pawl and nozzle when engaged by the pawl, and a sheet operated cnt-out linger connected to engage the pawl with the ratchet.

'1%. A sheet feeding machine having, in combination, a Suction feed Wheel having a perforated rim, a suction nozzle within the rim over which it travels, a pawl connected to the nozzle, a ratchet traveling in a direction to lift the pawl and. nozzle When enl gaged 'by the pawl, a cut-ont finger conf trip pawl when raised by the ratchet, and a sheet operated cut-out finger connected to engage the pawl with the ratchet and to rock the trip pin.

HENNING HALLSTREAM.

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