US1145403A - Sheet separating and moving device. - Google Patents

Description

E. CHESHIRE.

SHEET SEPARATING AND MOVING DEVICE.

APPLICATION FILED NOV-9,1909. RENEWED MAY 29, 1915.

1,145,403. Patented July 6, 1915. I

3 SHEETS-SHEET I- E. CHESHIRE.

SHEET SEPARATING AND MOVING DEVICE.

APPLICATION FILED NOV. 9. 1909. RENEWED MAY 29. 1915.

Patented July 6, 1915.

I} SHEETSSHEET 2.

E. CHESHIRE.

SHEET SEPARATING AND MOVING DEVIC-E. APPLICATION FILED Nov. 9, 1909. RENEWED MAY 29. 1915.

1,145,403. Patented July 6, 1915.

3 SHEETS-SHEET 3.

tion,

.ing device.

reference is to be I had UNITED. STATES PATENT onnicn WISCONSIN, ASSIGNOR TO MILLER SAW OF ALMA, MICHIGAN, A CORPORATION SHEET SEPABATING AND MOVING DEVICE.

originalapplication filed July 22, 1909, Serial No. 508,896. Divided and this application filed November 9,

Specification of Letters Patent.

Patented July 6, 1915.

1909, Serial No. 527,004. Renewed May 29, 1915. Serial No. 31,312.

To all whom it may conoem":

Be it known that I, EDWARD Cnnsmnn, a citizen of the United States, residing at Mllwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Sheet Separating and Moving Devices, of which the following is a full, clear, concise, and, exact descripreference being had to the accompanying drawing, forming a part of this specification. v

My invention relates to automatic sheet separating and moving devices, and particularly to devices for separating thetopsheet from theremainder of a pile and pushingit forward to be seized bylan automatic feed- The object of my i'nvention'is the provision of an improvedrdevice character, and one which will beeflicient, certain and regul'arin its operations.

The embodiment of. my invention wh ch will be described below hasfibeen described and illustrated in m copending application Serial No. 508,896, filed July. 22, 1909, Faper feeding and handling devices, of which this app ication is a division.

--For an understanding of theinvention,

scription taken iniconnection with. the acco'mpanying drawings, which shownfa. device illustrating the principal features of. the invention,'and in which:

Figure 1 is a side elevation of the device Fig. 2 is a rear elevation; Fig. 3 is a plan; Fig.4 is a view similar to a portion of Flg. 1, butwith the parts in a different position; Fig. 5 is a partly septional detached view drawn to anenlarged scale, illustrating the sheet lifting shoe and related parts in still another position; and Figs. 6 and 7 are an inverted plan and a perspective view respectively, illustrating-the form and operation of the sheet-lifting shoe.

The invention is shown in the drawings as used in connection with an automatic feeder forplaten presses, but this is only one of a number of possible applications and is used for purposesof illustration merely.

Referring now to the drawings; D 'is. a

table for supporting the pile of paper.

This table is slidably'mounted in the feed of the above I tothe following debox by means ofa pillar D which slides in a. guide D. An intermittent upward movement is imparted to the table D at the removal of each sheet from the pile, the efiect being that the top of the pile is maintained at a constant level. The mechanism by which the movement of'the table D is effected forms the subject matter of my copending application Serial No. 527,003, filed November 9, 1909.

In the device illustrated the feed box has H detachably mounted thereon a hood F which carries the operating parts of the feeder. Slidably mounted in lugs Gr (Figs. 2 and 3) extending inwardly from the sides of the hood F are a. pair of pins G which are car- .ried by a presser bar Gr, compression springs G? being inserted between thepresser bar -and the lugs G which springs tend to hold the presser bar in its lowermost position, i. e. against the upper edges of the feed box. 'When the presser bar Gr is in its lowermost position; and a pile of paper-is in place upon the table. D", the presser bar G presses upon the paper along the front edge thereof and forms a stop against which the'pile of stock is intermittently moved, as described above. Cams G, mounted on a rotating shaft F are provided for intermittently raising the pre sser bar and allowing one of the sheets of paper upon the pile to be-mo'ved forward. These cams each have a projection thereon, which projections engage the rollers of cam le'vers G which are pivoted to the hood and "the'ends of which engage in notches in the pins G As the cams G revolve, therefore, the levers G are operated to raise the presser bar and allow the paper to be moved outward beneath it.

The sheet separating mechanism proper H is actuatedby means of a bell crank lever H rockably supported in the hood F adjacent thecenter of the front end thereof. Movement is imparted to the bell crank lever H by means of'a cam H secured to the shaft F The cam H is formed with a small starting hump H and the configuration of the remainder of the cam is such that a slight forward'movement is imparted to the bell crank lever by the hump H and, after the bell crank lever has remained stationary for a short time, a. considerable further forward movement is efiected. The bell? crank levers then remains stationary for a period and is afterward allowed by the cam to re: turn to its original position, such return being efiected by a spring H The. slight preliminary movement caused by the hump H causes the sheet lifting shoe to operate.

Suitably secured to the hood is a bracket H to which is pivoted at H a horizontal rod H 'carr'ying on its outer end a block H which carries the sheet lifting device. The rod H is provided with a lug H having therein a segmental slot H through which passes a pin H carried by the bracket, which in serves to limit the movement of the rod H about its pivot H The block H is adjustably mounted upon the rod H "so that to provide for the use of various sizes of sheetsof paper and carries a bent end stop H, the block H being adjusted upon the rod H so that the end stop H presses lightly against the rear of the-pile of paper. Pivoted to the upper part of the block H is a link H having pivoted to the outer end thereof the pneumatic lifting shoe H. The link H is'provided with a.projection' H arranged to be engaged and moved by a block H secured to a movable rod H fwhich derives its movement from the bell crank lever EU, to which it isconnected through the intermediary of an arm I, as will hereinafter be described. Rockably supported in the block H is a spindle H carrying at each. end a lever to which is secured a paper separating dog H. The spindle H is -formed with a projection H thereon which engages in a recess H formed in the lower side of the block H so that the latter, in its forward and backward movements, will intermittently rock the spindle H- to raise and lower the dogs H The lifting shoe H is provided with a rear plate H" the ends of which extend slightly downward (Fig. 7) and behind which the dogs H engage when they are raised. As-

the block H is moved forward by reason ofthebell crank lever H being moved by the hump H of the cam H and the rod H being consequently pulled forward, it engagesthe projection H and thus raises the lifting shoe H to lift a sheet of paper. The pivot of the lifting shoe being located near the rear edge thereof, this edge will rise first so that the paper will be lifted from its rear edge, which is desirable. Just as theshoe H takes its uppermost position, it strikesrods H and H and isthereby again brought into parallelism with the top ofthe pile of sheets. Practically at the same time. as the shoe H is raised the rear face of the recess H engages against the projection H of the spindle H and efiects a downward. rocking movement thereof to lower thedogs H, the result being that these dogs slip downwardly and forwardly the counter shaft F ever, the sheet has had time to ie/ oe rear pint H and enter beneath the lifting shoe before the sheet of paper lifted thereby has had time to. fall, and en gages the top of the second sheet to h old it In order that the shoe H may be enabled I to perform the above described'lifting operation its lower face is formed with a plurality of concentric connected circular grooves H (Fig. 6) and with a central hole H communicating by means of a hose H with a pump H actuated by a cam on Just as the shoe H is being lifted, the pump is actuated by its cam to create a suction in the hole H and concentric'grooves H gs that, as the shoe is raised, a sheet of paper will be pneumatically gripped thereby and raised with it. Immediately after the sheet. has been raised the movement of the. pump is reversed a'nd consequently the sheet falls.

reach the pile again the dog s H haveentered beneaththe lifting shoe and the sheet of quently falls with its rear edge Before-how paper-' consee resting upon the points of these dogs whereby it is separated from the remainder of the ile. The dogs H press upon the pile of s ock Suficiently hard to prevent the removal-of any other sheets of paper when the separated sheet is withdrawn, the pressure being maintained by, the flat face of the member H at the rear of the notch H.

In order to prevent the lifting foot H from raising two sheets at once owing to the paper being drawn. into the concentric grooves H and thereby creating a suction upon the second sheet of paper in the pile, I form a slight depression H (Figs. 6 and 7 between the rear edge .of the lifting shoe and the circular grooves H The efiect of this'isclearly' shown inllig. 7. "When the top sheet is sucked against the shoe it adapts itself to the configuration of the lower surface thereof and therefore creates a small passage between itself and the next cur during the slight movement of therod H due to the hump H efl ecting the preliminary movement of the" bell crank le-. ver H While the above operations'have been g ing on the sheet pushing device has begun its, movement. The sheet pushing device is constructed as follows: An arm Iis attached to the free end of the bell crank lever H by means -of a friction joint and carries at its end a cross bar I to which are attached 1o friction disks I arranged to engage the topsheet of paper and move it forward. It is to this arm I that the rod H is pivotally connected, as at H?" (Fig. 4:). When the bell crank lever is in its upper'and rearinost 15 position, e., just before it is operated by ppsition shown in Fig. 5. When the hump begins to press upon the roller of the bell crank lever H the lever I is moved downward until the cross bar I presses upon the top of the spacing pin I andrea neau ingt e remainder of therewit .movement of the bellcrank lever, the arm-- I atthe same time rocking about its -frictio nal' connection;. "By-"this means, a uniform distance between .the cross bar and the "top of the spacingpinl at the beginning of the operation is msured.

Just 'before the I above operations takeplace the projections ,of the cams G will haweepemted the cam levers G to raise the pins G and thereforethe presser bar G to enable the sheet to bepushed out in front.

Having thus described my invention, what I claim as newand 'd"secureby,Let-

ters Patent, is:

' 1. Mechanism for separating-the top sheet from a pile of-sheetsand moving ittoward a feeding device, co'mprising'means for separating the top sheet from the remainder of the pile, means for subsequently engg i'n the separatedsh'eet and moving it forward,

and a spacing device for engaging said sheet moving means at the first part of its'movement, thereby to prevent said sheet moving.

, begins to move the bell crank lever H again.

mains in that position until the cam H means from engaging the top sheet until the latter has been released by the separating device. 2. Mechanism for displacing the top sheet from a pile of sheets, comprising-a pivoted member, means for intermittently rocking 95 When this occurs, the lever I will be forced i to rock about its frictional pivot until the cross bar I slips off the spacing pin I and moves downward to engage, by means of the friction disks I, the top sheet of paper and move it forward into the position shown in Figs. 1 and 3 to be seized by thefeed grippers or the like, it being remembered 5 that'before the'cross bar I moves from above the spacing pin,'the lifting shoe and dogs willhave separated a sheet in the manner described above. The spacing pin' 1 exactly determines the time at which the 40 friction disks will strike the paper and the distance forward through which it will be moved, regardless of buckling of the paper, should any occur.

' lVhen the above operations have taken place, and a'sheet of paper has been moved forward and removed by suitable grippers or the like, according to the type of ma-"' chine with which the device is being used, and when the' cam H has rota-ted far enough, the'bell crank lever H will be returned to its original position by means of the spring H, and the lifting shoe and related parts will resume the position shown in Fig. 5. During the-first part of the return movement of the bell crank lever H the cross bar I will be raised, and the friction disks I will be lifted from'the paper, the stiffness of the friction connection be tween the arm I and the bell crank lever being sufficient to effect this. After the cross bar I has been raised to a predetermined extent, further lifting isprevented by the engagement of a pin I with which the arm I is provided, with the under side of the rod H. The pin I will then slide against the said member'tow'ard and away from the pile,

- a sheetengaging and moving device pivoted sheet from a pile of sheets, apneumatic sheet lifting shoe-having a plurality of suction spaces in its lower surface and having a depression extending rearwardly from saidsuctlon'spaces, and means for operating sa1d shoe, said operating means and said shoe belng so arranged that the shoe extends inwardly from the edge of the pile'of sheets for the purposes set forth.

4. Mechanism for separating the top sheet 7 from a pile of sheets, comprising a pneumatic sheet lifting shoe having a suction orifice therein and formed with a plurality of grooves connecting with said suction orifice and with a depression extending rear- I wardly from said grooves, and said shoe beingdisposed so as to extend inwardly from 'the rear edge of the pile of sheets, for the purposes set forth.

.5. Mechanism for separating the top sheet from a pile of sheets, comprising a pneumatic sheet lifting shoe arranged adjacent tothe rear edge of the pile of sheets, means for moving said shoe down to engage the top sheet and upward to lift the same, and

a loosely mounted separating member arranged tobear against said shoe 'when the latter is in its lower positionand to enter beneath the shoe when the latter-is raised,

- for the purposes set forth.

. 6. Mechanism for separating the top sheet from a pile of sheets, comprising a pneumatic sheet liftingshoe arranged adjacent to the rear edge ofthe pile of sheets, means for moving said shoe down to engage the top Sheet and upward to lift the same, a loosely mounted separating member arranged to bear agamstsaidshoe when the latter is in its lower position and to enter beneath the with the top of the pile.

, for moving said shoe downward to engage the top sheet and upward to lift the same, said shoe being provided with guide ways on its rear face, and a loosely mounted separating member arranged to bear against said guide Ways when'the shoe is in its lower position, and-t0 enter beneath the shoe when the latter is raised.

. 8. Mechanism for separating the top sheet.

- from a pile of sheets, comprising a' support.

a substantially horizontal .arrn pivoted. to sald support, means for rocking said arm about its pivot, and a pneumatic sheet lifting shoe pivoted to said arm toward the rear edge of said shoe, so that upon saidarm being rocked to lift said shoe, the rear edge of the latter will be lifted first.

9. Mechanism for separating the top sheet from a pile of sheets, comprising a support, a substantially horizontal arm pivoted to said support, means for rocking said arm about its pivot, a pneumatic sheet lifting .ing means.

messes shoe pivoted to said arm toward the rear edge of said shoe, so that upon the arm be 4 ing rocked to lift said shoe, the rearedge of -the latter will" be lifted first, and means for engaging said lifting shoewhen in its uppermost position to bring it intoparallelism withfthe top of the pile of sheets.

10. Mechanism for separating the top support, an arm pivoted to said support, a pneumatic sheet lifting shoe pivoted to said arm, means for imparting a rocking movement to saidarm to raise and lower said shoe, a lever pivoted to said support, means for impartinga rocking movement to said lever in an opposite direction to the movement' of said arm, a dog pivoted to said lever, and means for limiting the'movement of sheet from a pile of sheets, comprising a said dog relatively to'said lever, saiddog' and said lever being so disposed that said dog bears upon the top of the pile of sheets when said lever is in one of its positions, and

engages behind the said pneumatic shoe .7

when said lever is in its other position.

11. Mechanism for separating. the top I sheet from a pile of sheets and moving it toward a feedlng device, comprising a pneumatic sheet lifting device, a sheet moving device, arranged to operate after the top sheet has been lifted by said lifting device, means for engaging the top of the pile beneath the lifted sheet and clamping the same against movements, and means, controlled by said sheet moving device, for locking said clamping means in its operative position during the movement of a sheet by said sheet mov- In, Witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

' EDWARD CHESHIRE. Witnesses:

FRANK M. BRUCE,

- FRANKH. PETRm.

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