US901937A - Tablet-forming machine. - Google Patents

Description

B. W. SCOTT.

TABLET FOEMING MACHINE.

ABRLIGATION FILED H0115. 19o?.

Patented Oct. 20; 1908.

4 SHEETS-SHEET 1.

l WITNEssEs 7.

INVENTOR WW f "/4 B. W. SCOTT. TABLET- FOBMING MACHINE. APPLIOATION FILED Nov. 15, 1907.

lmemed 001;. 20, 1908.A

4 SHEETS-SHEET z.V

"13. w. SCOTT.

TABLET POBMING MACHINE.

APPLICATION FILED NOV. 15, 1907.

901,937. Patented Oct. 20, 1908.

4 SHEETS-SHEET 3.

WITNESSES B. W. SCOTT.

TABLET FORMING MACHINE. 4 APPLIGLTION FILED Nov. 1 5, 1907.

Patented Oct. 20, 1908.

4 SHEETS-SHEET 4.

INVENTOR ab? f f l .45 p. the construction o a p uncli.

- To all whom it may concern: 'l

UNITED-sTATEs rArENT OFFICE.

vVBURToisI W. sooTT, oF DETROIT, MICHIGAN, AssIGNoR To ARTHUR ooL'ioN COMPANY, oF

DETROIT, MICHIGAN,` A CORPORATION OF MICHIGAN.

No'. 901,937. l speeificationpf Application med November 15, 1907. serial No. 402,263.

Be it knownthat I, BURTON Soo'ri, a citizen of the United States, residing at Detroit, county of'IVayne, Stateof Michigan, have invented certain new and useful Improvements in Tablet-Forming' Machines, and declare the following to be a A full, clear, and exact description of the same,

such as will enable others skilled in the art to .f which it pertains to make and use the fsa'me, reference being had to the accompanyjing drawings, which form a part of this speciication. L v

My invention relates to-tablet forming machines, and has forits object to provide .an improved machine' by which medicinal powder maybe pressed into tabletsof a required form and size.

'chinev embodying myl invention. Fig. 2, is

In the accompanying drawings-: Figure l, is an eleva-tion of a tablet forming niaa plan view of the saine, the `Qpo'wder receptacle, .the upper compression roll, arbor and lattached cani being removed, and a part shown in section to show the actuating worm. Fig. 3, is a perspective view of the 'powder distributing frame.-4 Fig. 4, is a sec tion taken in avertical plane through the axis of the upper partof the machine, at right anglesto the shaft E, some of the parts beingshown in full. Fig. 5, is a detail View of a portion of the'upper part of the machine, looking'fi'oin the right of Fig.

' are reti-acted.

2, the shield S lbeing removed. Figf, is a det-ail sectional view, some of the parts ybeing shown in full, and the section taken on the line, 6-6, Fig.

2, the'point of view being from the left ofsaid line, as shown in Fig. 2. Fig'. 7, is a-detail part sectional view,`illus -tra-ting the way in'which the lower punches Fig3 8, isa detailsectional View of the distributing frame on the line 8 8 Fig. 2, a portion of the rotary headf being indicated in dotted'lines. Figs..9 and 10'are detail pers ective views illustrating Ais a standard upon which is a table B. C is a bracket extending Ifrom the standard A, and Dis a standard extending from the outer end of the bracket C.

- E is a shaft supported in bearings inthe ,standard-'1),'adaptedto beeactuated by a TABILET-VFORMIG MACHINE .I

' having a w orml-F (Fig. 2) at its center.

. J is a standard rising from the center of the table B.

I is an annular cam.

-Ia is a sleeve extending upward concentric with-the cam I; said cam rests upon the table B and the sleeve Ia upon the cam I, both surrounding the standard J.

H is a rotary head adapted to turn upon the/ sleeve Ia concentric with said cam and provided at its periphery with worm teeth h, with which teeth the .worm F engages to `rotate the head H whenthe shaft E is rotated.

5, 5, is an annular surface upon an upper cylindrical portion of the head H.

6a are cylindrical apertures formed in the surface 5 of the liead^H adjacent to the pecent-ric with said head being formed.

'6 are dies secured in the apertures 6a. The apertures 61 are extended downward through the head H near its periphery and are fitted, so Aas to reciprocate, punches having small upper cylindrical portions )punches7 rest upon the u-pper 'edge of the camll', and are actuated thereb as the head H is rotated, carrying the punc es with it.

10- is a cam engaging over the disks 9 of the punches 7 to retract thesame where the cam 11 .slopes downward. The cam 10 is Iprovided, in case the punches 7 should stick and fail to drop by their own weight.

of the head H, and 3 are blocks or cross- `reciprocate vertically therein.

riphe'ry thereof, a ring of said apertures con'- i which upperv portions itinto the cylindricai apertures inv the dies 6, their upper ends Y. forming bottoms .of the liollows or matrices `headsfittinginto the slots. 2,' and adapted to ipulley G or G1, ora hand wheel W, vand into the extended portion of-these apertures V surface, by screw 13, thedower ends o the 2 are radial slots formed inthe upper part drical, and adapted to fit into. the apertures of the dies 6. The slots 2 do not extend quite down :to the surface 5 of the head H, but leave a smooth cylindrical portion 5a.

-14 is an arbor secured at one end to `the upper end of the standard J and at the other end to the upper end of the standard D.-

16 is a cam upon the arbor 14, adapted tol contact the upper ends of the dies, and forcev said dies downward.

I cross-head 12*L below the table B, and ex-A 15 is a wheel pivoted upon the arbor 14 in position to contact the upper endsl of the punches 4 as they pass under said wheel, and force said punches downwardto theirvlowest position, as indicated in Fig. 4.

12a is a cross-head adapted to reciprocate vertically in ways on the standard D.

12 is 'a wheel pivoted in bearings onthe tending upward through a slot in the same, the wheel 12 being located directly below the wheel 15, and adapted to contact the lower ends of the punches 7. The cam 11 is broken away to make room for the upperY portion of the wheel 12, which forms a con-l tinuation of said cam.

17 is a powder distributing frame adapted to be fitted to the surface 5 of the head H. The distributing frame 17 is divided into two concentric chambers having the form of arcs of circles: The outer chamber is indicated by the reference letter 18, and the inner chamber by the reference letter 19. The inner Wall of the distributing frame 17 lies against the cylindrical surface 5"l of the head H, and is held stationary by a part or shield S secured to the table B. The chamber or compartment 18 has a wall 18h at one end, and a wall 18f at the other end, and is divided into sub-chambers or compartments 18, 18h, by a wall 18C. The inner chamber or compartment 19 is provided with walls 19a, 19h, 19e, 19d, and 19e, which divide it into various sub-compartments, as shown in the drawing, the walls 19, and 19e, constituting the end walls.

18d is an aperture extending through the dividing wall between the chambers 18 and 19, so as to connect the subchamber 18a with the portion of the chamber 19 between the walls 19a and 19", and 18e is a similar passage connecting the sub-compartments 18n with the compartment between the walls 19b and 19.

18gis a passage connecting the sub-coinpartment 18b with thecompartment 19, between the division .walls 19d and 19. The

aperture.

passage 18g lis located adjacent to the end wall 18f.Av

2O is a lreceptacle vided with a discharge pipe '21. The receptacle 2O is supported by an arm 22 (Fig. 4), which i's pivoted upon the. rod 23,` rising from lthe standard J concentric therewith. The receptacle 20 may be moved to ldeliver the powder to any part of the outer chamber 18 of the powder distributing frame 17, by turning said receptacle about the rod V23. As a rule the powder is delivered toward the left-hand end of the compartment 18, as the frame is shown in Fig. 3. y

The walls 19a and 18h do not extend' radially to the head H, or its surface 5, but form together a V-shaped guide, which will tend to pile any powder that may be carried against said guide in a heapv atthe junction of said walls. The other divlding for the powder, pro- Walls do not extend radially to the surface 5, but act in conjunction with the wall between the chambers 18 and 19 to lform guides which tend to gather' any powder slantingly inward over andin contact with the surface 5 to a point beyond the series of apertures in the dies 6, but leaving some space between its inner end and the cylindrical surface 5a.

19f is an aperture formed throughv the partition or .wall 19e at the lower edge, and at the inner end of said partition.y

24 is a screw plug passing through an aperture in the table B, its upper end forming a portion of the cam surface of the annular cam 11. The screw plug 24 may be removed and any of the punches 7 may be dropped through the aperture thus left, thus removing them from the machine, and they may be replaced by passing them through said In formmg punches, it isnecessary to carefully shape and harden that portion which does the compressing,'and it is desirable to have a heavy and strong body to said dies, so that they may be acted upon forcibly by the cams and presservwheels without excessive wear or danger of breakage. This has made such punches very expensive to make. To avoid this, I form'the body of untempered steel, and at the upper end form a T-shaped aperture 7b (Fig. 9). I then form afsmall cylindrical end piece 8a having a head 8b (Fig. 10) and harden this small end piece to the required temper. then inserted inthe larger main body of the punch, as indicated in Fig. 9.

This is t head H, and as said, headis rotated is 4car-y rPhe operationof vthe 'above described de vice is vas followsi-The powder is placed in the receptacle 20, flows downward throiigh the delivery spout 21, and stands in a heap in the distributing frame 17 in the compartvinent l'thereof, at the left Ahand end, as

shown in. Fig. 3, so that the-powder passesthrough the passage o r aperture 18d between the partitions or d ivision'walls 19',l and 193. The powder rests upon the surface 5 ofthe passage oraperture 18g, where it will be carrled along by the partition19e and allowed to pass through the passage or aperture 19f, and will then be carried'around by the surface 5 inside of the gathering linger 26 of the delivery trough 25, and will be again gathered up by the partitions 19 Iand 18h.

The apertures in the dies 6 pass continually'under the gathering frame 17 just in side of the wall between the compartments 18 and 19. When one of said apertures passes under the partition or wall 19a, the punch 7 having its upper part 8 extending 18e. Should the powder overfiow the partiV and if it overflows this partitioi'n.

into said aperture, .is at its lowest position,-

and the powder retained by the walls or partition 19, 18h will fall into and fillsaid opening. This powder will generally be loose, and the amount thatfalls into the opening will be somewhat variable on this account; for this reason I so forinthe cam 1l as to slightly raise the die 7 after it has passed the partit-ion 19a, so as to compact the prin-'der together within the opening in the dies (i. If this opening is not entirely lilled,.

an additional quantity 'of powder willbe swept into it` by the partition V19", and if then not entirely filled vby the partition 19, etc.

, The punches 4 are raised abovethe gathering frame 17 by the cam I, acting upon the lower ends of the rods 3a. `When such dies have passed the gathering frame, they are forced downward again by the cam' 16, striking against their upper parts (Fig. 1), their cylindrical lower ends being forced into the aperture in a corresponding die 6 to` press the powder therein together, in conjunction with the corresponding lower punch 7 and its cylindrical extension 8. The iinal pressure to compact the powder firmly into a;-

under the wheel'l. After having passed tablet is given when a punch 7 passes overv ythe wheel 12, and a corresponding punch 4 the wheels 15 and 12, thepunches 4 are again I raised by the cam I, and -the punches 7 are raised by t-he cam 11, to force the tablet out of the aperture in the die 6, asfindicated inV Fg. 6. The continued motion of the head H causes the finger 26.to sweep the tablet in'v vthe delivery trough 25, from which 'it is delivered to a basket, or convenient receptacle,.- The proper degree of compression for the tablet is secured by regulating the vheight of the cross head 12a by means of the handwheel -12b, and coacting parts. ItV` willbe seen. that the above construction is secured,

1and theipartsare strong,'easily removed and adjusted, and that a complete 'filling ofthe Aso that each tablet shall contain its proper quantity of medicinal material. p passing over the top of' a partition 19- or 19? is loosened. so that -it will fall readily and erenly into the-matrices of th'edies; v

so "f apertures of the dies is secured in everyy case, i

The powder The construction employing the blocks' in theslots2, withthe downwardly extending rods 3, enables small dies 4 to be used,.

which are comparatively cheap to'make f What I'claim is 1. In a'inachine ofthe kinddescribed, the I combination of a. head, a die thereon pro` vided with' an aperture, a punchv locatedl above said head and adapted toengage in the aperture of said die, av party connected with ysaid punch extending through. said head-and ada tedto reciprocate therein, and a cam located) to co-act with said part to actuatejsaid adaptedfto be removed from engagement with said head.

below 'said head `and adapted 10o punch, said pant and connected punch being f a. in d machine of the kind described, the

combination 4ofpaA head, a die thereonpro-` vided'with an aperture, afslot insaid head, a block fitting into'said slot, a punch secured to said block above said die andA adapted to engagekin the aperture thereof, a part eX- *i tending from said block through said head,

anda cam located lbelow said head vand adapted to coactwith said block and punch Y tovactuatethe same. .i

3. In a. machine of the kind described, the combination of a rotary head, *a seriesof dies provided with apertures arranged ma circle on said head concentrictherewith, a

portion of lsaid head of less diameter than' 4 the series of dies tandextending 'above said* dies, said cylindrical portion'being provlded with slots extending radially inward the periphery thereof, blocks fitting 'in' sald i slots and carrying' punches located above A said dies, and means for. actuating said 1'25 4. In d maden@ ofthe-kind described, the f blocks.

combinationof a rotary-head, a series of dies provided with apertures arranged inA a clrcle on said head concentric therewith, a portion of said head of less diameter than' the series of dies and \extending above said dies, said portion being provided with slots extending radially inward from the periphery thereof, blocks fitting in said slots and carrying punches located above said dies, a part extending from eachv of said blocks through said head, and' a cam located below said head and adapted to coact with said part .to actuate said punches'.

5." In a machine of the kind described,the combinationl of-a rotary head, a circular series of dies thereon having their upper surfaces level with a plane surface on said head, means for supplying powder to said dies, compressing it into tablets and lifting the tablets from said dies, a delivery trough, a finger .extending `over said surface and adapted to guide the tablets into said trough,

' means for displacing` the surplus powder to a part of said surface inside of said. finger, and means for again displacing said powder to cause it to fall into said dies.

6. In a machine of the kind described, the combination of a rotary head, a circular series of dies thereon, a distributing frame.l divided into a' plurality of compartments in the direction of motion of said head by walls intermediate the ends of said frame of .a helght that shall permit any powder that shall accumulate a ainst it to pass over said' wall, said wall having its lower edge against the surface of' said head, and a second wall adapted to gather together the powder that may pass over said `first mentioned wall, the parts being so arranged as to carry said dies under said frame to receive the powder therefrom, and means for supplying powder to sald frame upon the surface of said head,

v for the purpose described. 40v

7. In a machine ofthe lkind described, a dlstrlbuting frame 17, having outer and innercompartments 18 and .19, a 'passage between said compartments,"'and means for supplyinglpowder to the outer compartment so that it shall pass through said. passage to the inner compartment, and dies adapted to pass under said frame to receive the powder which has passed through said passage with their matrices. y 8.- In a machine of the kind described, a

distributing frame 1,7, having outer and A, inner compartments 18 and 19, a assage between said compartments, means or sup` plying powder to the outer compartment so Y that' it shall pass through said assage to the yinner compartment, .and a wa 191 in said' inner compartment further along in the direction of motion of said head than said I passage.

9. -In a machine of the kind described, a distributing frame 17, having outer# and inner compartments 18 and 19, a passage between said compartments, means for supplying powder to the outer compartment so' thatl it shall pass through said passage to the inner compartment, and a wall 19b in said inner compartment further along in the direction of motion of said head than said passage, a partition in the compartment 18, a second wall in the compartment 19, a lsecond passage fromthe compartment 18 adjacent and ahead of said partition with.

reference to the vmotion of the head, said passage leading to the compartment 19 between said walls.

10. In a machine of the kind described, a rotary head having dies in a surface thereof, a distributing frame 17 resting on saidsurface and having outer and inner compartments having end walls, a wall dividing said inner compartments into two sub compartments, a partition dividing said outer compartment into two sub-compartments, a pasering finger 26 terminating further from the center of said head than the vspacingin the end wall of theframe 17.

11. The combination of a rotary head having a die therein, a distributing frame having a` cross wall adapted to permit powder to pass over it, and means for feeding powder l to the surface vof said head in advance of sa-id wall, saidi die beingA adapted to pass under said frame to receive powder into its matrix, for the purpose described.

' In testimony whereof, I sign this lspecification in the presence of two witnesses.

' BURTON W. SCOTT.

Witnesses:

. ALEGIA TowNsEND, ELLIo'rr J .l S'roDDAnn.

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