US1790910A - A cobpora - Google Patents

Description

' r- 3, 31 G. o. FROSTAD ET AL 1,790,910

FEED FOR DISKS OR THE LIKEv Filed April 6, 1928 5 Sheets-Sheetl Feb. 3, 1931. G. o. FROSTAD ET AL 1,790,910

FEED FOR DISKS OR THE LIKE Filed April 6} 1928 s Sheets-Sheet -2 .IHI..III.,,II 5h .W, .1 lalwmllll HHM I 1 II B .U Hii a. v ml ll M J on v v a m Ft 6 m m? I O I v I v n Q mar M MW Q\ Q QM. mfi /Q.@ A L H? i b .H Ill. h w n ow vm mm kn mu a Q$ 1931- e, o. FROSTAD ET AL 1,790,910

FEEDFOR DISKS OR THE LIKE Filed April 6, 1928 5 Sheets-Sheet 3 C luv/Elnora? M Q $4M 241M a W, WM, g fwwxm Patented Feb. 3, 1931 UNITED STATES PATET OFFICE" GEORGE o. FROSTAID AND JAMES E; AnNEN, or MILWAUKEE, Wisconsin, ASSIGNORS TO THE NATIONAL PAPER can COMBAEY, or MILWAUKEE, Wisconsin, A. CORPORA- TION OF WISCONSIN I Application med April 6, 1928. Serial No. 267,879.

This invention relates tofeeds for disks of paper or the like, and is herein particularly" 7 means for punching disks from a paper strip,

fla'nging the same, and forcing them into the open end of a preformed can body. The

10' can body and the flange are thereafter rolled together to form a joint.

In certain cases, it is desired to have the printed matter appear on the disk forming the can end. It is difiicult to insure continuous registry of the punching die with printed matter appearing at intervals on a paper strip, and it is therefore desirable to preform and print the disks and feed them individ- V I 'we provide for varying the position of'the ually to the machine. In other cases, it may be desired for various reasons to feed unprinted disks to the machine.

The disks employed are relatively thick and stiff as compared withordinary paper. They are usually of relatively heavy stock, impregnated with paraflin. Their edges are generally slightly burred, dueto the die cutting operation. The disks therefore tend to resist sliding of one over the other, thus making ordinary feed devices impracticable. The disks are frequently warped or wrinkled.

We provide a feed mech anism wherein the disks are supported in stack. The feeding is from'the bottom of the stack-so that the supply of disks may be renewed Without stopping the machine. lVe' provide suction means for drawing the bottom disk again-st the supporting plate, thereby eliminating the ir regularities in feeding which ordinarily arise 40 from the wrinkled condition of the material. pusher for sliding the bottom disk out from under the stack. Means is also provided for rifliing the stack so as to remove any tendency of the disks to adhere. This tendency arises from the burs formed on the disk edges by the punching operation. We employ a separating finger spaced far enough from the support to permit [passage of the bottom disk in ,t the stack, but holding the remainder of the stack in cheek; Supplemental means is pro members having o preferably employ a reciprocating rnnn roe. DISKS on TEE LIKE vided beyond the fingers for feeding thedisks forward. 1 This supplemental means preferably comprises a pair of constantly driven feed rolls; 1 i

Regardless of'whether-a disk feeding device isfemployed in connection with a'can making machine or in some other combination, it is generally impossibleto employ feed means which will carry the disk .to its ultimate I destination. e thereforeprovide for feeding one disk forward by engaging it witha succeeding disk. In this manner,=the. disk fed may be spaced from the disk consuming device, thereby making'it easy to adjust. At

the same time, there is no necessity for complicated mechanism for advancing the disks 1 to their final position.

Since one disk is "fed forward by another,

disk feeding device relative .t'o'the disklcon- 'suming device. It is desirable to. maintain a substantially continuous supporting surface along the entire path ,of the disks, and we therefore employ a pair of supporting interengaging fingers. These fingers may be moved into or out of engagement with one another in varying amounts,uso as to provide a substantially smooth "and continuous supporting table of varying length. A top guide is providedfor to insurethat the edges of the leading disk and the one which is pushing it forward will not overlap. Thistop' guide preferably eX- tends from the feed rolls to the disk consuming device and is therefore made adjustable as to length. It is'further provided with yielding means whereby .it exerts a slight pressure on the top of the disks y The disk feeding device is'arranged to be holding the fed disks againstthe table so as driven from the diskgconsuming device, so

that the twounits operatein timed relation.

While we have described the feeding meche anism in connection with paper disks, it is to be understood that it is applicable for use in connection with othervmaterial and with machines otherithan can forming machines, and that such uses are contemplated w thout departing from the scope of the invention,

the accompanying drawingswhich illuser rollersD'may supply a strip of paper to,

trate the present preferred embodiment of our invention,

Figure 1 is a sectional View of a feeding machine embodying our invention;

Figure 2 is a plan view thereof taken along the section line 'I'III of Figure 1;

FigureSis a side elevation ofthe machine shown in Figure 1;

Figure 4 is a view. partially in elevation and partially in section, taken along the section line IVIV of Figure 3;

Figure 5 is a plan view taken along the section line VV of Figure 3; and

Figure 6 isan' enlarged sectional view of a portion of the feeder mechanism shown in Figure '1'. V H We provide a feeding mechanism A for feeding paper disks to a cam driven plunger B for shaping and inserting them into cylindrical can bodies,'and a vacuum system C for controlling'the movement of the disks. Feedrthe'plunger B from which disks are punched. The movementrof the feedingmechanism A, plunger B and'the rollers D are coordinated by an interconnecting mechanism E.

The feeding mechanism A for feeding "paper disks to the plunger B comprises a base 2, supported in part by a standard 4,

-and in part'by a plate 5,'secured by bolts 6 to the plunger mechanism B. Standards 7 are adj ustably mounted in slots 8 in the base 2and cooperate with a standard :9 for supporting a stack of paper disks 10. The standard' 9"is a'djustably'supported on a frame '11, carried by the base 2by a set screw The lower end ofthe' standard 9 is spaced from "the base 2 a sufficient-distance to. permit but asingle disk '10 to pass therebeneath at any 'time'into engagement with feed :rollers 13, mounted in theframe 11.

'A rack 14'is mounted in a slot 15, centrally disposed at the center of the base 2. The

' rack 14-carrie'sa plate 16, that engages the outer edge ofthe lower disk 10 duringthe feeding operation, As is shown-in FigHI- 2, -theFrac'k 14 maybe provided with a plurality of :plates 16 ands-16", depending upon'the diameter of the disks 10. The plate 16 havdng asloping portion 17 is secured'to the'rack,

14hy screws 18.

Referring-toFigure 6, the plate 16 engages the rear edgeof the'lower disk 10 and advances it during theoperation ofthe feeding mechanism A, at'which time "the plate 16 slides beneath the stack of disks 10 and :rif-

flesthem,therebyfreeing the lower disk :10

- from the stack'preparatory toa subsequent feeding operation.

Thebase2 is provided with-a chamber19 that'surround's the slot 15, to which aipipe 20,

- plate 16.

vided with a plurality of openings constituting ports disposed above the chamber 19. The ports 23 permit a gripping action of the disks 10, as they move along the base 2, thereby flattening them and holding them tightly in position to beengaged by the rollers 13.

At one end of the chamber 19, t-here is disposed a suction gripper 25, constituted by a block 26, that is upwardly biased'by a spring 27fin' order that the outer face of the block 26, which is provided with a port 28, shall engage the advancing disk and draw it firmly against the plate 22, in order that a positive engagement may be made between it and the rollers 13. As the edges of the disks 10 may carry burrs,'it is important that provision be made for insuring-that-the advancing edges stroying-the synchronism of the feeding mechanismwith respect tothe plunger.

The rack 14isactuated by'a pinion 29, car- 'ried by a'shaft30, that is, in turn, actuatedi:

by a pinion 31, engagingarack 32, slidably *mounted in the base 2 and connected to a link-3f4, constituting za'portion of the interconnectmg inechamsni-E. Accordingly, .as

the link '34 is moved forwardly andback ji .wardly, the plates 16- and18 are given a reciprocating motion that-advances-tl e lowest disk'10 and rifiles'the remaining diskspreparatory to the next advancing stroke *of the Referring to Figures '3 and 4,?the feed rollcrs 13 are-continuously drivenby a chain connected tothe lower roller 13, provided with a gear-:36, meshing. with a gear 3'? on the upperiroller.

A tensioningdevice 38, having a sprocket 39,"is mounted-ton theplungermechanism B.

Thetensi'on on-the rollers 37 is controlled by springs 40and thumb screws 41, carried by the frame 11. p V 'Asthe disks 1O -are advanced to the rollers 13, they pass'therethroughand are engaged by a guide'42 andsupported' by an adjustable table 44,-the position of which is controlled by 'a sp'ring i45,'a set screw 46 and a lug 47', carried -by the plunger B. tween tl1et-able44 and the guide 42 may be The distance bevaried in accordance withthe'depth of the disks 10. As thc'diskslO are moved over the, table 44in accordance withithe movement of the disk through the rollers 13, the "table 44 is adjusted in accordance with the diameter of the disks, and-to insure that a-disk 10 is moved over:the'table 44 into the plungermechanism Biin synchronism with the movement of a new-disk 10 through the rollers 13.

For this purpose,theguide 42 is provided with slots 48 and bolts 49, and the table 44 is carriedbyerods 50,-t he position of which or en] ing fingers 58 carried by the table 44, to ac- Q commodate for the adjustment of the position of the table as relative to the base Qand to provide a continuous surface over which the disks may travel.

head B comprises an outer barrel 54, carrying a die 55, at its bottom for stamping disks from paper when fed from the rollers D, as is described in our copending application. Within the barrel 5A is mounted a. sleeve 56,

carr in a unch 57 that coo erates with the Y 2: P P

die for punching paperdisks from paper fed by the rollers D. VVithinthe sleeve 56, aplunger 58 is mounted that terminates in a ram 59, havinga stripper 60 carried by a rod 61 extending longitudinally thereof. A spring 62 normally biases the stripper 60 in a downward position with respect to the plunger 58. The sleeve 56, plunger 58 and rod 61 are all actuated by severalrollers 64- positioned in the grooves in the cam faces 62.

The construction of the several face cams 62 and their sequence ofoperation is fully described in our copendingapplication and the I descrlption is not repeated'in the present apc plication, since the details thereof constitute no part of the present invention except as the operation of the plunger mechanism B effects the operation of the feeding mechanism A.

In the operation of the plunger mechanism B, the sleeve 56 is moved downwardly to strike out a disk of paper within the die 55.

The disk is then pressed into the body of a can held by a mandrel on an endless conveyor. After the paper disk has been driven into the can body, the ram 59 is withdrawn and the can is held by the stripper (30. After the ram 59 has been retrieved to its initial osition the strii er 60 is withdrawn b i the action of the spring 62.

A feeding mechanism 1) comprises rollers- 65 and adpistable rollers 66, each of which has a cam surface fer feeding a continuous strip of paper to the plunger mechanism B when it is desired to pun-ch out the disks during the operation of the plunger mechanism. For certain classes of work, it is diflicult to secure perfect registry of the die 55 with printed matter on the paper being fed to the plunger, and under such circumstances, it may be desirable to feed the preshaped disks to the plunger mechanism 13' by the feeding mechanism AJ The roller 65 is driven by a chain 66 from a pulley 67, carried by a shaft 68 that drives the cam faces 62. A tensiondevice 69 is provided for the chain 66. The link 34 is eccentrically mounted on to the roller 65, and accordingly the driving mechanism for the plunger B actuates the feeding mechanism D and the feeding mechanism A.

eating As the roller 65 turns,it imparts a reciprothat is transmittedtothe plate 16'for feeding disks lO' into the rollers in synchronism withthe movement of thefplunger mecha -nism B. As each successive disk passes motion to'the link34and the rack 35 7 through the rollers 13,it crowds-the-pre- In the operation of the feeding mechanism, a pile of disks 10 are placed between the supports 7 and 9. The supply of' disks 10 may be renewed continuously without interrupting the operation of the feeding mechanism.

As the";plunger' mechanism B is o-operate'd,

the reciprocating" motion is transmitted to the rack 32 and. the rack l hwitha'fresult that'with'the stroke of the latter,'tl1e l0wer disk 10 is advanced into-eng with the feed rollers.13.' g r ceding' disk into the die 55, belowthe ram 59. v The plunger mechanism or cap forming over which it is advanced.- J-By'reason of the location of the suction gripper 24, theadvancing edge of each diskflO is 'firnily held in position to be positively-engaged by'the rollers 13 uponthe initial engagement therewith, thereby eliminatingany tendency for the feeding mechanism to get out'of step with i the plunger'mechanism Bfor to -in'jur e the edges'of the disks 10 byim'p'roved" engagement with the rollers 13-;

Ne have provided a feeding-mechanism for supplying paper disks to a can making machine that'ischaracterized by the u'se'of a vacuum system for insuring thateach disk shall be brought into positive engagement with the feeder "rolls, thereby eliminating any unnecessary loss offtime in the feeding operation due to failure of the feeding rolls to immediately engage the advancing disks. At the same time, a positive feed insures perfeet synchronism between the operation of the feeder rolls and the plunger to which the disks are fed. Provision is made for using the feeding mechanism for disks'of different diameters by providing plates of different lengths and radii of curvature corresponding to the curvature of disksof different diameter, and "an adjustable table is interposed between the feed rolls and the plunger. Another important feature of our invention is the lug that rifiles the stack of disks during each feeding operation, thereby freeing the lower disk preparatory to disengagement With the feeding plate. The positioning of the gripper in close proximity to the feed rolls also assists in insuring positive feed action. The'provision of a vacuum system in connection with feed mechanism removes any dirt or lint that may be freed While We have described our invention in connection with'the feeding of paper disks topapercan forming machines, it is to be understood-that'it is adaptable for uses in connection Withmaterials other than paper and with machinery'other than can forming machinery, and that the use of the feeding mechanism for such purposes is contemplated Without departing from thescope of the appended claims.

We claim: v 1. In a suction gripper, a body portion having a port therein adapted to cooperate ith-material passing the gripper, and resilient means for advancingthe -body -portion into engagement with the material passing thereover. g g 2. Ina feeder mechanism, the comb nat on With a base member and-a-pai'r offeed rolls, of a material supporting table comprising a plurality of fingers extending outwardly from the base member and-a body portion having fingers intermeshing With the fingers extending'frozntheb-ase member and means foradjustingthe relative positions of the base-and body. I 3.'In-aieedermechanism for supplying blankstoa-head'forming machine, the combination with a continuously driven roller and means for periodically delivering a single blank to the; rollers, and means for guiding the movement of the blanks past the roller and directing-a preceding blank into engagement With theheadforming machine; 1 r

4. A feeding table comprising arack movable-longitudinally thereof,a plate carried by the rackfor engaging materialand a-recess, a slotin-the table,-connecting means between the raekand plate movable in the slot, and achamber formed in the feeder bedsurrounding a portion of the slot, the roof of the chamber being provided with a plurality of ports disposed-along the path of movement of the material and means for creating a partial vacuum inthe chamber whereby the material-iis held in firm engagementWvi-th the table during the movement of the ;plate.

ln-tes'timony-whereof We-have hereunto set ourhands. o .o a o J GEORGE ON FBO STAD. JAMES EFANNEN.

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