US2365922A - Method for producing powder puffs - Google Patents

Description

Dec. 26, 1944. A. E. VAUGHN 2,365,922

' r METHOD FOR PRODUOING POWDER PUFFs Filed may e, 1942 s sheets-sheet 1 7/ Ariola/VJ METHOD FOR PRODUCING POWDER PUFFS @a "W @wf-M 3 Fok THE F//?M A TTORLVE Ks 136026, 1944'- A. E. VAUGHN 2,365,922

METHOD FOR PRODUCINGy POWDER PUFFS Filed May 6, 1942 3 Sheets-Sheet 3 HA 'QR/.6, K/Echg FOJTER d HARK/5 FOI? THE FIRM A TroQ/VEVJ Patented Dec. 26, 1944 l o y' t l ?ooeoee seooootNG POWDER PUFFS I y Alben@ yang-hn, Losngels, Salif.

eooleettoo Monette, @testeo 11 claims. l(c1. eze- 19.) @ne ptieset 1. inyentioo relates to the E materiel .of tthe Sleeeupf thesenvelopo @noter suelomien sei t Bosio Steps iof the method Slet forth io the 1tlootento.entioned` o I :eYiouo anelieetion include formationof',iotleototionor poeets in elitist t eet of maiierial, the depositing tereinrof merfxysf tred ouentities of powder, @the oveflayitte t'f a t Second .Sheetthezbondlg ofthe W0 Sheets 'tor eether, @11d 5th outgoing of 5the ,bogged ,shqgs omzoomdr the noo,1, otolteleeeeiedyidttoh tiefer filled eme1opes-y- Q11@ object of ofthe oeeent ie v ention is to prox/oie a novel and o advantageous prooeduloeoforfiormne and flli'og Such .poekets without [necessity `for oozot.n uotlely gripping the Sheet from moment the nookets ore -formed untihthe two eheets der efbonded- In this-regard one feeture o he yinvention is the o .eoepupf forming pockets loyprojeetione uone .p1ete, that y iilotiotl ription to O t 1 atie? of tllelroierredfoeto @veel i to erections my inveneteloye proelessixe euro/m action! FJgiS a ,e ,problem .enootlnteet fin the o f .eblcioetion fof '1g pewoelzvlleddenxelooee .of cloth or like Sheet .lotioteriausthat ofenoesmgenysubstantiel quantity t of ,powder in the oouree'f menufaeturingfthe envelopes. lI t. imot ,d iliettlt to stu-1f @relatively large quantity .ofowder finto a completed en velope having @suitable opening :Ier lln but it -is exeeednglwdimcult to venclose Joeletyely largequantitieseffpowder in a prooestlee involvr ing depositing of the powder masses open poekete early inthexproeees.offfetoroetng the envelooee. o @Beier art envelopes .produoed Joy the 9 1? it N ieW -llutratirte `the openepoelsetmoeedurefexe ohereoterizedloyo1-elev 1f Qkfttffrtlnglplete tiyelysmall;andmeletlyelyehallow powdepmeeeeelit?? .M d 11,1 Pt Rttttfe l of ft .l Qneoof thedimulties)involyedismhat ofrllimte v img the distribution .ofythe depositedpowder in o 4g. 12 is Rgespeetye View partly in ,seQtiQIl the openopoeketS-tomexent interfereneewth-the Q--thelprefforlodofo I ILQ lleftne .powderpuff operation .of bonding together Lthe two fabri p :ou'd-lby .511?, `sheets.adjacentmhepoqkets Any contamination i --glie L2 11p s by A.powder" lf `,infie adhesive o bonding medium Ite- @We-eri@ suns,in faulty .clqsunenfmenvelopes. Another ,L heck eerxellelly designated difculty is 'ithat"thewio1ume ahdespecallyjthe 11,2. Q? gefe1:apb1y theJg@Jl A,Well1 -.2 is Iglotrgqgpted cusmbuuan fehefemasedpomermayiplaceme fordisngpmglgowder. .one fronmdisoensmg f te. moet? sito ,devotion of the wall 2| I prefer at present to use a sheet 23 of silken velure, the warp and weft of which is silk and the pile of which is rayon. The back wall 22 may be of any suitable material, but preferably is less flexible than the front dispensing wall 2l so that the front wall rather than the back wall bulges outward to encompass the powder mass 28, as shown in Fig. 12. In practice I pro-duce a back wall 22 of the desired character by using a sheet 26 of cotton velure, disposing the sheet with the pile on the outer face and placing on the inner face a coating 21 for the dual purpose of sealing the inner face of the sheet and of providing the desired thickness in the back wall 22.

The powder puff of Fig. 12 has a marginal portion or flap 28 to serve as means to be manipulated by the user for spreading and blending the applied powder. of my invention the marginal flap 28 is continuous around the envelope and consists of three united layers, a marginal portion of the sheet 23 of silken velure. a co-extensve marginal portion of ythe sheet 26 of cotton velure, and the intervening coating 21. In the present form of my invention, the intermediate coating 21 is a rubber cement and not only serves to seal and reinforce the back wall 22 of the envelope, but also serves to bond the two sheets 23 and 26 together and to contribute thickness to the marginal ilap 28. An important characteristic of the rubber cement is that it is permanently pliant and permits a degree of exibility in the marginal flap.

In service the powder is pressed and rubbed lightly against the skin to dispense and apply powder from the mass 28, the powder working outward through the mesh of the silken velure. The fact that the back wall 22 is non-porous prevents any substantial quantity of the powder from being dispensed onto the users hand or being otherwise wasted'. After the initial operation of applying the powder, the marginal flap 28 of the powder puff is employed as a wiping means to spread and blend the powder.

The apparatus shown in Figs. 1 to 5 has a stationary frame, of angle-iron construction, the frame including legs 3|, and an upper longitudinal pair of parallel bed members 33. On each side of the apparatus frame is mounted a guide rail above and parallel to the corresponding bed member 33. In the construction shown, each of the guide rails'35 is supported by a'forward standard 36 and a rear standard 31, each standard comprising av bolt 38 encased bya suitable sleeve 40. The purpose of the two guide rails 35 is to conne a powder-feeding assembly generally designated 4| that is mounted on the frame for movement between a rearward position shown in Fig. 3 and a forward position shown in Fig. 4. A detailed description of the powder-feeding assembly 4| will be given later..

Mounted in the apparatus frame below the longitudinal bed members 33 is a support assembly, generally designated 42, that is vertically movable for cooperation with the powder-feeding assembly 4|. As best shown in Fig. 5, the support assembly 42 includes a support plate 43 on which is mounted a plurality of metal cylinders 45, each of which cylinders provides a circular recess 46. Preferably each ofthe metal cylinders 45 is surrounded by a resilient collar 41 of sponge rubber or similar material. The support plate 43 carries a forward vertical plate 48 and rests on aprectangular frame of angle-iron con- In 'the preferred form- 2,365,922 'i if struction, the rectangular 'frame in turn resting on a lower frame comprising a pair of longitudinals 52 interconnected by a transverse horizontal plate 53. The transverse plate 53 is in turn carried by a vertical slide rod 55 that extends downward through a guide sleeve 56 on a bracket 51. The vertical slide rod 55 terminates in and is supported by a movable transverse bar 59 that is controlled by a relatively long operating lever 69. The operating lever 6U, which carries a roller 6| for engagement with the transverse bar 58, is pivotally supported by a bolt 62 on 'a bracket 63 and is adapted for engagement with a fixed latch member 65 on one of the legs 3| of the frame.

The support assembly 42 is guided in its longitudinal movement not only by the guide sleeve 56,

but also by a pair of transverse guide bars 66 interconnecting the two bed members 33. In my preferred construction the tendency of the support-assembly 42 to gravitate downward is augmented by the action of a pair of helical springs 61. As best shown in Fig. 1, a transverse equalizing bar 68 is connected to a floor bracket 10 by a suitable bolt 1| and has its opposite ends connected by the springs 61 to the corresponding ends of the transverse bar 58.

In the preferred practice of my invention I provide a series of plungers 12 in the form of headed pins for movement upward through the metal rings 45 to break up the powder tablets as heretofore suggested. In the depicted construction the headed pins loosely extend through correspending bores in the support plate 43 and are adapted to be operated by a lift plate 15 that is guided by the surrounding rectangular frame 50. At each side the lift plate 15 carries a longitudinal angle-iron to provide a downwardly extending flange 11.

For operation of the lift plate 15, suitable means such as a yoke 18 may beA provided, the yoke comprising a pair of bars interconnected at their outer ends by a handle 8|. Each of the bars 80 is pivotally mounted on the previously mentioned lower frame 5| by a suitable bolt 82 and carries a roller 83 for contact with the under side of the lift plate 15. To limit the downward movement of the yoke 18, the two bars 80 may be formed with fingers-*85 at their inner ends for abutment against' the longitudinals 52 of the lower frame 5I.

The powder-feeding assembly 4I includes a box that is supported by suitable rollers 9| resting on the bed members Y33, the bed membersI being provided with suitable bars 92 to serve as guide tracks for the rollers. f At the forward end of the box 90 is a cross bar 93 of angle-iron for contact with the forward standards 36 to limit forward movement of the box and the rear end of the box is provided'with a similar cross bar 94 to strike the rear standards 31 to limit rearward movement of the box. Both of the cross bars also extend under the guide rails 35 to prevent upward movement of the box.

The bottom ofthe box 90 is a relatively thick plate 95 that may be termed a measuring plate inasmuch as it has a plurality of apertures 96 for measuring and dispensing quantities of powder for the individual powder puffs. ,When the powderfeeding assembly 4| is in the forward position shown in Fig. 4, the several apertures 96 of the measuring plate 95 register with the recesses 46 provided by the previously mentioned 'metal cylinders 45 in thel support assembly 42. Each of the aperturesV 96 is preferably vv'of downwardly flared conguration,as .shown in Fig. 6, and is preferably provided at'its lower end with an inner rings .91 of .relatively hardmaterial such as hard rubber dimensioned .to fit .into theeorre Spending `metal cylinder 4.5. .on the .subvert plate 42. An outer ring 9.8 of softer material such as soft rubber is aligned with the upper edge of the the measuring plate 95.

Included in the powder-feeding assembly 4I is means providing a plurality of plungers adapted for movement into and `out of the apertures 96 of themeasuring plate 9.5 for the `purpose of compressing ,powder `in theapertures into `tablet torm and subsequently displacing `the tablets. For example, the plungers |00 `may extend downward from ahead plate |.0I on the under side of a transverse `timber .|02 that is adapted for vertical movement towards the measuring 'plate 9.5.

In .the construction shown inthe drawings, a xed vertical guide frame; generally designated |03, mounted on brackets |05 on thesides of the box 9.0 comprises two upright rods |06, a head piece |01, and inclined braces .|08 extending from the head piece to `.the rearend of the box 90. The transverse timber |02 ismounted on the lower end of val rectangular slide frame generally designated I vI0 .comprising a lower -transverse member a pair of upright slide rods ||2, and a head piece\l.|3 interconnecting .the upper end of the slide rods. The lower transverse member I l I has a pair of handles IIS and carries Va pair of slide bearings I .I0 embracing the two upright rods|06 of the vertical frame |03, while theslide rods I I2 of the slide fram IIO extend through suitable slide bearings III mounted on the upper end of the guide frame.` l

'.The slide frame` I.|0 controlling the multiple plungers "|00 may 'be operated 'by suitable vmeans such as a toggle 1'arrangement generallydesignated'II. As shown in Figs. 1,3, and 4, a pair cl upper toggle links |20 are pivotally mounted on brackets |2| at theupper end of the xed frame |03 and are interconnected at their 'lower ends by a transverse operating handle |22. Pivotally con- Grassina the handles |15, the .operator then nieves the powderffeedins .assembly 4| forward to the position indicated `in Fig. fl and forces the operating lever 60 downward into engagement with `the xed latch 6,5, thereby moving the support .assembly 42 upward to 'press the support plate 43 `towards the measuring plate 95 4at the bottom of the box 90. Since the upward movement of the ,boxf90 is limited-by extension of the l two cross bars 93 and 94 into engagement from below with the two guide rails 35, the operating lever .60 may create pressure of relatively high magnitude against the `measuringplate 95. When the pocket-forming plate I3I is initially placed on the velure sheet |30, the projecting bodies |32 at least partially` depress `the velure sheet into the recesses 46, `and the upward movement ,of the support assembly 42 against the measuring plate 95 completes the movement of the projecting bodies into the recesses 'to form the required pockets -in Ythe sheet |30, as may be noted in Fig. 6. Atthis point ini-the sequence-of operations the hard rubber rings 91 at the lower ends ofthe measuring apertures 96 in `the measuring plate 95 are pressed-forcibly against .the upwardly presented velure pile on the upper side of the pocketforming lplate I3Il, the lower ends of the measuring apertures being closed by the pocket-forming Vplate; The operator then grasps `the transverse operating handle |22 ,and lifts it, .to raise the slide fra-me V| I0, through the yaction `of Vthe lower .toggle links I 23, to its `raised position illusf trated in Fig. 3. When the slide frame I L0 is so raised, the plungers |00 are also raised withit, to uncoverY the "apertures 96 of the vmeasuring plate 95. The slide framell may be held `in .this raised position by the operator, .or otherwise suitably retained thereirnwhile the .measuring apertures `9,6 are lled with powder.

y yIoJll the measuring apertures 96 `theoperator may employ means such as a thin board or blade .|34 (Fig. 6) `to shift powder forwardover the various measuring apertures, after `which V.the

operator employs the blade |34 asia scraper ,to

nected totheupper toggle links |20 are two lower toggle `links, |23 `that are `pivoted at their lower ends tobrackets '|25 on the lower transverse member -I|| of the sliding frame I I0, the arrangement ,being Jsuch .that the operating handle |22 moves against the lower ,toggle 'links to limit the down ward extension of the toggle assembly.

In the operation of the described apparatus for carrying out my new method ,of producing filled powder puffs of the character described, the 'operator .moves the powder-,feeding assembly 41| rearward Vto expose the Vsupport-,plate 43 and spreads 'a sheet |30 ofthe previously mentioned silken velure ,over the circular recesses 46 formed `by the ,metalcylinders 45, the pile of the silken velure being downward. This sheet |30 is to form the dispensing wal1`2`| of a number o f-pow-l Vder puffs.

Theoperator then places onthe velure sheet |30 whatmay be termed a pocket-forming plate, generally designated |3I in Figs.`6, 7 andll comprisinga flexible plateof metal or othermaterial with' anumber lof, .downwardly projecting bodies .I.32.,pos`itioned on `the Vlowersurface thereof to register with the .various recesses 46 vformed by the metal rings 45. In my `preferred construction.the,pocket-formingplate ispermanently cov- .eredon ,its upper-.surfaceby Va .sheet `of cotton remi-.e133 withthe pile .or ...velure upward.

return excess powder towards the hopper in-the manner indicated in Fig. 6.` This procedurells all `of the measuring apertures unii'ormly with relatively loose powder and -the operator then pulls the toggle handle |22 forward to causefthe powder lentrapped in-eachof the measuring apertures to be pressed into a tablet |35. The `forward movement of the toggle handle |22 causes the toggle links to extend, thereby shifting the slide frame |I0 downward to force .the various plungers |00 into the` measuring apertures A96. SufIicient pressure is created to cause `substantial coherence on the part of the vtrapped powder, sufcient to cause the powder to havea definite tendency to remain in tablet form. The operator learns to judge the proper pressure by feel; After theplungers are moved downward to exert the relatively `high pressure against the entrapped powder, as indicated in Fig. 7, the toggle handle is shifted. rearward sufliciently to` retractthe formed only if the lower end of each measuring aperture 96 is sealed in a manner to prevent any radial leakage of the entrapped powder under pressure. The relatively rigid inner ring 91 at the lower end of each measuring aperture presses into intimate contact with the cotton velure on the pocket-forming plate |3| to make such a seal, the cotton velure providing a positive barrier to prevent radial creepage of the powder. The required sealing action cannot be attained by substituting for the cotton velure surface any smooth metal surface or surfaces of such material as cardboard, blotting paper, or sponge rubber.

The pocket-forming plate |3| is now removed by a progressively curling action indicated in Fig. the operator` grasping opposite ends of the pocket-forming plate and in effect progressively peeling the pocket-forming plate away from the indented velure sheet, the peeling action progressing from the ends of the pocket-forming plate towards the middle. I have discovered that this peeling action will not disturb the desired indented configuration of the velure sheet |30, whereas a pocket-forming plate too rigid for the peeling action cannot be lifted away from the velure sheet without disarranging the sheet.

After the pocket-forming plate |3| is removed, the powder-feeding assembly 4| is returned to the forward position and again the operating lever 60 is manipulated to press the support assembly 42 upward against the measuring plate 95. The upward movement of the support assembly 42 causes the velure sheet |30 to be effectively gripped around the rim of each pocket, the parts then being positioned as shown in Fig. 8. The operator then manipulates the toggle handle |22 to cause the plungers to move downward to maximum extent, thereby dislodging each of the tablets |35 from the measuring plate to drop into the pocket below. The next step is to lower the support assembly 42, retract the plungers |00, and shift the powder-feeding assembly 4| rearward to expose the indented and powder-filled sheet of velure |30.

The fabrication procedure may be completed by providing a coated sheet of cotton velure, spreading the coated sheet over the powder-laden sheet |30, bonding the two sheets together around each of ythe powder tablets, and then cutting through the bonded zones around the pockets to release individual filled powder puffs. While these nal steps may be carried outI in anysuitable manner, in the preferred practice of my invention I employ temporary panels formed by attaching sheets of cotton velure to temporary reinforcing sheets such as sheets of cardboard. The velure face of each temporary panel is coated with a suitable adhesive and then the panel is placed adhesive-side down on the powder-laden sheet |30. Thus, Fig. 9 indicates a temporary panel, generally designated |36, lying face down on the powder-laden velure sheet |30, the temporary panel comprising a sheet |31 of cardboard, a sheet |38 of cotton velure with the pile side towards the cardboard, and, finally, a coating |40 of adhesive sealing material. In the preferred practice of my invention the temporary panels |36 are coated with rubber cement and placed in stock until required and a suitable solvent is applied to the adhesive coating to make the coating tacky just before the panel is used.

As soon as the temporary panel |36 is placed face down in the machine, the powder-feeding assembly 4| is returned to itsv forward position vand the support assembly 42 is again elevated,

thereby causing each of the metal rings 45' to press upward towards the corresponding outer rubber ring 98. This action results in the lower.;

velure sheet |30 being bonded under pressure to the upper velure sheet |38 in a circular zone around each of the pockets. It is important to note that the compressed powder has sufficient coherence to retain its tablet form throughout this procedure so that no powder whatsoever is displaced into the circular bonding zone around each pocket.

Since the tablets |35 are relatively large cornpared to the capacities of the pockets and since the tablets do not conform to the natural or unrestrained configuration of the pockets, substantial stresses in the fabric material of the pockets would be transmitted to the bonding zones around the pockets if the support assembly 42 were lowered at this point to release the series of interconnected pockets. In the preferred practice of my invention, therefore, I provide for reducing such stresses prior to release of the interconnected pockets. Preparatory to this step, the plungers |00 may be lowered into reinforcing contact with the temporary panel. The operator swings the handle 8| downward to move the lift plate 15 upward, thereby forcing each of the plungers or `pins 12 upward against the lower side of each powder-filled pocket. Fig. 10 indicates the manner in which the plunger deforms the pocket and breaks up the tablet |35 to restore the powder to loose form. The minimizing of the stresses is accomplished for the most part by the redistribution of the powder to conform with the natural coniiguration of the pocket, but the action of the plunger 'I2 may also result in stretching the fabric material to reduce stress, The interconnected pockets of powder supported by the sheet of cardboard |31 are then released from the bonding pressure by lowering the support assembly 42 and the powder-feeding assembly 4| is moved rear-ward to` permit removal of the sheet of cardboard |31 supporting the interconnected pockets of powder.

In my prior practice I proceed from this point by completely cutting through all of the layers including the sheet of cardboard |31 to release the pockets as individual envelopes. In the present practice, however, I employ a cutting die to cut each envelope out of the assembly, but cause the cutting die to penetrate the sheet of cardboard |31 to only a partial extent, the penetration of course being from the fabric side of the assembly. As a result of such partial penetration the individual fabric envelopes are re-4 leased but the cardboard retains its unitary character. Partial cutting of the cardboard in this manner permits me to use each sheet of cardboard at least twice as the foundation for a temporary panel |36. Preferably the cardboard is shifted relative to the cutting zones when it is employed a second time.

After the individual envelopes are severed from the assembly they may be subjected to a vacuum device to remove all lint or small bers released by the cutting operation. The individual powder puffs are then in final form for sale.

My description in specific detail of a preferred practice of the invention' is given by way of illustration only and may be varied widely within the scope of my appended claims.

I claim as my invention:

l. A method of producing an envelope from sheet material andencasing in the envelope in the course of manufacture thereof a predetergesetze mined'mass of powder, :said method includingthe steps of: compressing the mass of powder'into temporary coherence; thereby forming aV temporary tablet; placing-the temporary tablet between twolayers oi, sheet material; bonding the two layers' together to form a closed envelope without substantially disturbing 'Said coherence, vthereby avoiding spreading'the powder into the bonding zone; and applying forceaga'inst'the outside of the envelope `to break' up said tablet into powder' form and` to redistributethe'powder content of theenvelope` to minimize strains in the sheet ina-j terial across the bonded areas of the envelope.

2. A methodV ofproducing an envelope from sheetmaterialandencasing in the envelope in the course of manufacture thereof a predetermined mass of powder, said method including the steps of compressing-the mass of powder into temporary coherence, thereby forming a temporary tablet; placing the temporary tablet between two layers of sheet material; gripping the two layers together into bond to form a closedenvelope without substantially disturbing said coherence, thereby avoiding spreading the powder into the bonding zones; and while still gripping the two layers together applying force against the outside of the envelope to relieve strains in the sheet material. and to redistribute the powder by breaking up said tablet.

3. A method of producing an envelope from sheet material and encasing in the envelope in the course of manufacture thereof a predetermined mass of powder, said method including the steps of: compressing a plurality of predetermined masses of the powder into temporary coherence, thereby forming a plurality of tempora-ry tablets; forming a plurality of depressions in a layer of said sheet material to serve as a plurality of powder pockets; depositing said tablets in said pockets; placing a second layer of said sheet material over said first sheet and over the tablets deposited thereon; gripping the two layers together into bond in zones surrounding each of said-pockets; while gripping the two layers together applying force against the outside of the pockets to relieve strains in the sheet material and to redistribute the powder by breaking up said tablets; and 'cutting through the two sheets in said bonding zones to separate the pockets as powder-filled envelopes.

fl. A method' characterized `by the use of a member with a plurality of apertures for producing envelopes from sheet material and encasing in the envelopes in the course of manufacture thereof predetermined masses of powder,` said method including the steps of: blocking said apertures from one side of said member to form powder molds; placing powder in said apertures from the other side of the member and compressing the powder therein to form temporarily coherent powder masses; displacing said temporarily coherent masses from said apertures onto a layer of said sheet material; overlaying lsaid sheet of material and said temporarily coherent masses with a second layer of sheet material; bonding said two layers together around said masses of powder while the masses are still coherent-thereby forming a. plurality of interconnected enveiblesheets Vto ja temporary stilening 'v sheet; depositing spaced masses-of the'powdered material on rone of 'said flexible sheets; overlaying the spaced "masses and vthe powder-laden flexible sheet with the other of said llexible sheets; bonding said two exible sheets'together around each of said masses, therebyforming a panel including and reinforcedby Vsaid temporary stiifening sheetyandv cutting through said flexible sheets and partially through'said stiiening sheet around eachof said pookets'to release the pockets as individual envelopes without cutting the stiffening'sheet into` corresponding pieces, whereby the samestiffe'ning sheet may be employed to repeat the lprocedure with other exible sheets.r

6. A method of producing an envelope from sheet material and encasing in the envelope in the course of manufacture thereof a predetermined rass of powder, said method including the steps of placing a temporary tablet, formed by compressing a mass of powder, between two layers of sheet material; bonding the two layers together to form a closed envelope, thereby avoiding spreading the powder into the bonding zone; and applying force against the outside of the envelope to break up said tablet into powder form and to redistribute the powder content of the envelope to minimize strains in the sheet material across the bonded areas of the envelope.

7,. A method of producing an envelope from sheet material and encasing in the envelope in the course of manufacture thereof a predetermined mass of powder, said method including the steps of: placing a temporary tablet, formed by compressing a mass of powder, between two layers of sheet material; gripping the two layers together into bond to form a closed envelope, thereby avoiding spreading the powder into the bonding zones; and while still gripping the two layers together applying force against the outside of the envelope to relieve strains in the sheet material and to redistribute the powder by breaking up said tablet. A

8. A method of producing an envelope from sheet material and encasing in the envelope in the lcourse of manufacture thereof a predetermined mass of powder, said method including the steps of: forming a plurality of depressions in a layer of said sheet material to serve as a plurality of powder pockets; depositing a tablet, formed by compressing a mass of powder, in each of said pockets; placing a seco-nd layer of said sheet material over said rst sheet and over the tablets deposited thereon; gripping the two layers tolopes containing the powder masses; and cutting l through said two layers at the bonded zones around said masses of powder to release individual powder-containing envelopes.

5. A method of fabricating from two flexible sheets an envelope` containing a mass of powder including the steps of: attaching one of said flexto redistribute the powder by breaking up saidtablets; and Cutting through the two sheets in said bonding zones to separate the pockets as powder-filled envelopes.v

9. In a method of making a powder dispensing envelope from a pair of sheets of sheet material, one of which is porous, the steps of: forming a depression in said porous sheet; compressing a mass of powder into temporary coherence adjacent said depression, thereby forming a temporary tablet of said powder; moving said tablet bodily into said depression; overlaying said depression with the other of said sheets; bonding said sheets together around said depression to form an envelope enclosing said powder; and applying force against the outside of said envelope to break said tablet into powdered form.

depression and thus form an envelope, and lightly bonding said sheets together outside of said area to provide a flat marginal flange of substantial width; and applying force against the outside of said envelope to breal; said tablet into powdered form.

11. In a method of making a powder dispensing envelope from a pair of sheets of sheet material, one of which is porous, the steps of: forming a depression in said porous sheet; inserting into said depression a temporary tablet formed of cohering powder; overlaying said depression with the other of said sheets; bonding said sheets together around said depression to form an envelope enclosing said powder; and applying force against the outside of said envelope to break said tablet into powdered form.

ALBERT E, VAUGHN.

#Ff/ff CERTIFICATE OF' CORRECTION.

Patent No. 2,565,922. December 26, 19m.

' ALBERT E. VAUGHN,

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction asl follows: Page 6, first column, line'LL, claim lO, for "compensating" read compressing;. and that the said Letters' Patent should be read with this correction therein that the sam'e may conform to the record of the case in the Patent Office.

Signed and sealed this 27th day of March, A. D. 19).;5.

Leslie Frazer (Seal) Acting Commissioner of Patents.

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