US2003092A - Apparatus for molding a liquid bag - Google Patents

Description

May 28, 1935'. A. RICHARDS APPARATUS FOR MOLDING A LIQUID BAG 5 Sheets-Sheet 1 Filed Apr il' 14, 1934 A. R ICHARDS I APPARATUS FOR MoLDI NGiA LIQUID BAG I May 28, 1935. I

5 Sheets-Sheet 2 Filed ApriI 14, 1934 I'Fllflriliill. ll llr May 28, 1935. A. RICHARDS APPARA' I'US FOR MOLDING A LIQUID BAG 3 SheetsSheet 5 Filed April 14, 1934 Patented May 28, 1935 2,003,092, 7 V n V 1 APPARATUS Fort Monomer A IQUID; BAG J Antonio Richards, Providence, R. I. Apmieation. April 14, 1934, Serial No. 720,523

' Claims.

My invention relatesto improvementsin liquid bags and an object of my invention is to :provide a liquid bag particularly one ofthe hot water type or fountain syringewtype :provided with a solid integral wall extending vertically for a substantial distancethereof to prevent the bag from'expanding and contracting, .or other- Wise bowing when filled with liquid-muse, said wall being preferablyintegrally molded in the shaping; and manufacturing of the liquid bag. By employing this wall molded integrally'with the bag, I am enabled to provide a center wall entirely constructed of the material of the side walls and entirely integral therewith, not depending on its strength for the joining of rubber rods in a separate vulcanization which would tend to distort the bag after the bag has been initially formed.

An object of my invention is therefore to make" a molded rubber bag provided with a central wall seamless in everyrespect.

An object of my invention therefore isto pro vide an integral wall, orfin which will prevent.

the liquid bag from bowing when filled with liquid or otherwise getting out of shape, and permanently retaining it in use in the desired flat shape. I

It is well known that when rubber surfaces touch each other when dry they tend to become stuck to each other and deteriorate. A further feature of my invention is to continually'space the side walls of the liquid-bag when-not in use A further object of my invention is to provide a bag which will accomplish the results named in the two preceding paragraphs without in any way affecting the external appearance orshape of the liquid bag. 1

Further features of my invention relate to the improved process of molding such a bag with the integral center wall heretofore described and a suitable novel type of mold and. core for this purpose to provide a slottherein for the purpose of forming the integralwall.

For-this purpose l preferably" separate the usual liquid bag core usedIin the molding operation into two portions, namely, a mainportion which may be withdrawnas usual through the distended neck of the bag and a supplemental portion complemental to said main portion except for a vertical slit near the centerthereof to form the molded integral wall of my improvedliquid bag, which may after the maincore-has been withdrawn be tilted laterally. from,v the formed ((31. 18-3 5) n integral wall and readily withdrawn through the neck of my improved liquid bag. v Further features of my invention relate to the detailed construction of sucha core and the 1 means I preferably'employ to rigidly secure the core in position in a suitable liquid bag mold,

These and suchother objects of my invention as may hereinafter appear will be'best undergstood from a description of the accompanying drawings, which illustrate my improved mold, its methodof use and my improved liquid bag. 7 V n In the drawings,- Fig. ,1 is a plan view of a lower mold with all portions of my improved core secured thereto after the. upper mold has been removed, and showing the molded bag and parts of my composite core in section therein;

' Fig, 2 is a sectional view taken along the line 2-2 of Fig. 1 showing the uppfir mold in place; Fig.3 is a. sectional view taken' along the line 3-3 of Fig. lthrough the center portions of :the main core cut-out and supplemental core.

Fig. 4 is 4-4' of .1 through the upper portions of the cut-out of the main core and the supplemental'core. I Fig. 5 is a plan view of my improved mold and ,moldedliquidbag illustrating the first step of removing the corefrom the bag, name- 1y that of drawing out the main core through the distendedneck of the bag vertically up; wardly therefrom and leaving the supplemental. core in its molded position below the'molded a sectional view taken along the line seamless wall, and showing the bagin section.

Fig. 6 is a plan view illustrating the steps in the method of removing the supplemental core T from the molded bag by first tilting it laterally away from; the l, molded seamless center wall as shown in dotted lines and drawing it outwardly through the neck as shown in full lines, the molded bag and integral center wall of being shownin section.

Fig. 7 is a side elevation of my improved"' I molded bag. V g g V Fig. 8 is a vertical sectional view thereof taken along the line 8 -8 of Fig. 7. V

In thedrawings, wherein like characters of reference indicate like parts throughoutl0: generally indicates amolded liquid bag of flat oblong shape having" a body portion l2,a con-, 1'.

stricted neck l4, side walls l8. and. end walls I! and a central vertical wall: l6 integrally molded to the opposite adjacent side walls l8. of said bag in-aseamless manner. hitherto, this seamless molded wall 16 prfivents As stated irregular bowing orshaping when filled with liquid in use and also spaces the side walls l8 when not in use to prevent any direct contact with each other and hence deterioration of the rubber surfaces thereof. While -,I am

, aware that others have attempted to solve this general problem, so far as I am aware they have done so by inserting a plasticizable peg or rod in the bag usually after the initial molding andsupplementally cementing or semi-vulcanizing it thereto inja manner to form a seam at each end thereof. By employing my improved core and mold shown herein, and split-1. ting the usual core into, a main core and a, supplemental core in the manner shown here-: in, I believe I am able to providefor the first time a liquid bag having a molded integral wall integrally spacing the sidewalls of the liquid bag. I

While any suitable plasticizable rubber strips therearound or laying rubber layers on the top andbottom'thereoLplace it in a mold and subject itto a sufficiently high' temperature to plasticize the material to form the desired article. While any" suitable type of plasticizable mate1*ial maybe*used in ac cordance with the usual, practice of making liquid bags, I preferably construct my improved bagout of rubber and'for this'purpose Ipreferably' wind strips of unvulcan'ized[rubber or layer sheets having the'usually desiredvul-I canized materials incorporated therein around the core prior toinsertingit inthe mold; 1

'As shown in Fig. 5- myimpro'ved' core prefer ably includes a mainportion name a slipplemental portion 24, These portions 22 and 24 are suitably secured'together, the "desired rubber wrapped around it and then laid in the? lower mold 26 (Fig. '1) Of.- course, ifbther types of plasticizablematerials are used other than rubber, the "core may be placed in the .mold and the plasticizable material laid around it or on top of and below it in any suitable manner either before core --in ithe-r'noldi j 3 v a My entire apparatus includes the lower "mold 26 having the hemi-liquidbag concavity 28, re' stricted neck concavity 36, and a flat concav-;

or after insertion o'f {theity' 32 extending, from above said n'eck concavity tothe endwallfi i therein.

of said mold havingholes' 36 body' l2 and'ne'ck 14 thereof and 0fthe'thickness'of the bag except for the rounded edges, and constricted neck -fiiithereof'and'a flat portion 45 of the thickness of said bag-:labove the neck thereof I and adapted to lie insaid flat concavity 32 in-sa-id lower mold 25 having holes '42 therein aligned-with said mold holes" 36.. Saiclinain core body portion' '22 has a 'cut out' portion '44 extending downwardly from above the center of-said liquid bag" portion-slightly offset from the vertical central line thereof including a ba se portion 4 "a "center portion 48 of le'ss widthfisaid base-portion 45 having holes55 projecting upwardly therefrom in said core and said center portion-- 48 having vertical material may beused for forming my improved bag, I p'ref--; erably cover a suitable core 20, bywrappinggrooves 52 extending laterally inwardly thereof and an upper portion 54 of less width extending laterally on one side of the vertical central line thereof a slight distance as at 56 (Fig. 1) and a substantial distance as at 58 (Fig. 1) on the other side thereof of the vertical central line thereof. Said main core 22 also preferably has a hole 60 extending vertically upwardly from said second offset side 58'of said upper cut-out'portion 54,to the top portion of said core, or outer end of the flat portion 40 of said core.

7 I also provide a supplemental core portion 24 substantially complemental to said cut-out portions 44 having a complemental base 62 having pins 64 projecting vertically upwardly therefrom within said main core holes 50, a center portion 66 having splines 68 projecting laterally thereof within said main core grooves 52 arid an upper portion of less width than said cut-out upper portion 44 extending from the second side 58.of said cut-out to a line 12 spaced from a vertical central line of said'mold an amount equalto the amount that the first side of said cut-outis spaced from said vertical center to form .a liquid bag wall forming slit I5v (see Fig. .1) extendingvvertically near. the center of. said composite core to form the vertically central wall It of ,my improvedliquid bag. In myimproved construction I also provide a rod 18 projecting from-the upper portion H! of said supplemental mold through said hole 60- in said main. coreand'having a'threadedend 80 projecting from the upper portion thereof and 'extending beyond the mold end walland main core flat portion 40; I also provide. a nut 82 adaptedzto be threaded on 'said threaded rod end 88 to clamp said core portions 22 and 24 together. Itis thus obvious that the pins 64 fitting into the holes 58 'andzthe splines 68 fitting into the grooves 52 form. means to se-' cure, said core portions in alignment and said 'rod18 extending throughs'aid hole til in combination with a clamp or nut 82 form means to detacha'bly secure said core portions together in molding position within said mold. To align the flat main core portion 40 within the cut- Lout '32 in. said. lower mold I provide the pin means84 extending from said holes 42 into the aligned holes 36 in said lower mold to securely. align said core on said lower mold. I also provide the upper mold 85 having a cooperating hemi-liquid; bag body, neck and flat concavities 88, '96 and 92 respectively,adapted to overlie said core 20 and covering thereof to mold the exterior of said liquid bag with said lower mold. In operationQthe supplemental .core portion 24,15; insertedwithin said main core portion 22 so that the rod '18 thereof will project through the hole' 60 therein, the pins 64 fitting into the holes 50 and the splines 68 fitting into the grooves 52 to secure said core portions'in alignmerit and the nut '82" is then threaded on to the threaded end 80 of the rod 18 to securely clamp. said coreportions together. Then the strips of unvulc'anized rubber having'the desired vulcanizing materials incorporated therein are wrapped around or laid on each side of the coreand'the core'is then laid in the lower mold 26, with 'the pins '34 projecting therefrom through therespective holes 36 in the flat portion of the core Ml -to hold thecore in position on'said lower mold.

As statedhitherto, if desired; other typesof plasticizablematerial than rubber may be em t 7 2,0 ,0 2 ployed' which may be either wrapped around the core as stated, or poured 'or laid into the concavities between the mold and 'core formed bytheir. specific construction. The upper mold 85 is then placed over the lower moldpas shown. in Fig. 2 and the entire device subjected -to the desired molding heat or process withv the dee sired hydraulic or;other pressure'suitably exerted on said mold. After the rubber has been suitably vulcanized or the plasticizable material otherwise suitably plasticizedvthe upper mold 86 is removed, and as shown in Fig.5.theycore 2E3 surrounded by the formed bag is withdrawn" from the lower mold. The nut 82 is then withdrawn from the threaded end 80 of the bolt 18, thus detaching the main core 22nfrom the supplemental core 24, the neck I 4 of the molded or formed bag Ill is then distended in the usual manner and as shown in Fig. 5 the main core 22 may be withdrawn out of the distended neck thereof leaving the supplemental core 24 in its molding position underneath and laterally abutting the formed integral wall 16; As shown in Fig. 6 to remove the supplemental core, it is first laterally tilted so as to remove the upper. portion thereof laterally away from the lower endof the wall 16 after whichthe supplemental core may be readily withdrawn out of the neck of the bag as shown in full lines in Fig. 6,

It is thus apparent that I have provided a novel type of seamless liquid bag, for use as a water bag, fountain syringe bag or any of the other uses thereof; provided with a seamless integral molded vertically central wall, I6 for the double functionof keeping the bag in cor,- rect flat position in use and preventing the liquid therein from bowing it out of shape "and spacing the side walls l8 thereof when not inuse, a

novel type of core for use in them'olding thereof, a novel type of means for securing said core to said mold and an improved method of making such an improved molded liquid bag.

' I employ the words vertically; .horizontal- 1y, etc., as appliedto thevbag in a vertical position in use regardless of its position on the mold.

. It is understood that my invention is not limited 'to the specific embodiments shown or methods described and thatvarious deviations may be made therefrom without 7 departing from the spirit and scope of the appendedclaims.

What I claim is: I V 1 1. A core for use in making molded liquid bags, comprising a main core portion of the desired shape of the interior of said bag having a cut-out portion extending, from above the center to the lower end thereof slightly ofiset,

rod to said main core portion to rigidly securesaid coreportions together in molding position whereby said first core portion may be withdrawn vertically upwardly from said molded bag through the distended neck thereof, and

said supplemental core portion may ,be'; tilted shape of the interior of out portion extending from above the center to,

laterallly from said molded center walland withdrawn upwardly through said neck.

.2. -A core for use in making molded liquid bags; comprising amain core portion ofxthe de-;

siredshape of the interior of said bag having:

a' cut-out portion extending from above the centerto the lower, end thereof ofiset from the vertical center thereof, a supplemental core portion complemental to said cut-out portion except for vertical wallforming slit means on the upper portion of the center side, thereof extending vertically for .a'substantial' distance eachiside. of the-center of said combined core portions and means to rigidly secure said core portions together in molding position whereby said first core portionmay bewithdrawn verticallyupwardly :from said molded bag through the distended neck thereof, and said supplementalcore portion maybe tilted laterally from said molded center wall and withdrawn upwards ly through said neck.

3. Acore for use in making molded liquid" bags, comprising a main core portion of the desired shape of the interior, of said bag hav-, ing a cut-outportion extending from above-the center of'thelower end thereof slightly offset from the vertical center thereof, a supplemental core portion complemental to saidcut-out portion exceptfor a narrow vertical wall forming slit' on the upper portion of the center side.

thereof extending vertically; for a substantial distance each side of the center of, said combined core portions and means to rigidly se cure. said core portions together in molding position whereby said first core portion may be withdrawn vertically upwardly from said molded bag through the distended neck thereof, and said supplemental core portion may be tilted laterally from, said molded center wall and withdrawn upwardly through said neck and means to detachably secure said core portions;

te d e .4 I p p 4. A core for use in making molded liquid bags, comprising a 'main' core portion of the desired shape of the interior of said bag having a cut-out portion extending fromiabove the center to the lower end thereof slightly offset from the vertical center thereof and a hole projecting upwardly through the neck thereof, a supplemental core portion complemental to said cut-out portion except .for a narrow ver-' tical wall, forming slit on the upper portion of the center side thereof extending vertically for a substantial distance each side of the center of said combined core portions and a rod projecting upwardly therefrom adapted topro: ject through said hole in said main core portion and means to detachably clamp the end 7 of said rod tosaid main core portion to rigidly:

secure said core portions position. whereby said first withdrawn vertically upwardly from said molded bag through the distended neck thereofliand said supplemental core portion maybe tilted laterally from said molded center wall and withtogether in molding drawn upwardly through said'neck.

5. A core for use in'making molded liquid bags, comprising a main core the'lower end thereof slightly offset from the vertical center thereof, a supplemental core portion complemental'tosaid cut-out portion except for a narrow vertical Wall forming slit onthe upper portion of the center side thereof. extend core portion may be portionof the desired, 7 said bag having a cut desired shape of the interior ing vertically fora substantialdistanceleach side of the center of said combined core-portions,

desired shape of the interior of said bag having.

a cut-out portion'extending from above the center of the lower end thereof and a hole projecting' upwardly throughthe neck thereof, a sup pleinental core portion complemental to, said cut-out portion except for a narrow vertical wall forming slit extending vertically for a substantial distance each side of the center of said combined core portions and a rodprojecting upwardly therefrom adapted to project through said hole insaid main core portion, means on said core portions to-retain them in alignment and means to detachably'clamp'the end of said rod to said main core portion to rigidly secure said core portions together in molding position whereby said first core portion may be 'withdrawn vertically upwardly from said molded bag through the distended neck thereof, and said supplemental core portion may be tilted laterally I from said molded center wall and withdrawn upwardly through'said neck.

7.'A core for usev in making "moldedliquid bags, comprising a main core portion of the desired shape of theinterior of said bag having a cut-out portion extending frorn'above the center to' the lower end thereof, a supplemental'core portion complemental-to said cut-out portion vexcept for vertical wall forming slit means extending vertically for a substantial distance each side of the center of said combined core portions and means to rigidly'secure said core portions together inmolding position whereby'saidufirst core portion may be withdr'wn'vertically upwardly from said molded bag through the dis-- tended neck thereof, and said supplemental core portion may be tilted laterally from said molded center wall and withdrawn upwardly through saidneck. 1 I 8. In a liquid bag molding apparatus, a lower mold having a hemi-liquid'bag and neckcon cavity and a flat concavity extending from above said neck concavity to the end'wall of said mold having holes within, core means adapted to receive a cover of rubber or other plasticizable material to bei vulcanized and/or molded and to lie therewith in a molding position in said lower mold, including a main coreportion' of 'the of the bag and of the thickness ofthe bag except for the rounded edges and constricted neck thereof and a flat portion of the thicknessof said b ag' above "the neck thereof adapted to lie in said flat concavity in said mold, having holes therein-"aligned with said mold holes; and having a cut outflportion slightly offset from the vertical central line thereof-including a base portion, a center portion of lesswidtnsaid base portionhaving holes projecting upwardly therefrom in said core and said center portion having vertical grooves ex; tending laterally inwardly thereofjand an upper portionof less width extending laterally on one side of'the vertical central line thereof a slight said'rod end to clamp thereof including .a

bag except for distance anda substantial distanceionl'the' other side thereof,-said main core also having a hole extendingvertically upwardly from said second offset side, of said upper cut-out portion to the top portion of said 'core, a supplemental core portion substantially complemental to the cutout portion, having a complemental base having pins projecting vertically upwardly therefrom within said'main core holes, a center portion having splines projecting laterally thereof within said main core grooveaand an upper portion of less-width than said cut-out upper portion, ex-

tending from the second side of said cut-out to a line spaced from theverticaLc-entral line of said core an amount equal to the amount that the first side of said'cut-out is spaced from said vertical center, to form a liquidbag wall forming slit extendin'g'v'ertically near'the center of said composite core, and a rod projecting from the upper portion thereof through said hole in said main core and having a threaded end extending beyond the mold end wall, a nut threaded on said .mold portions t0- gether, means extending through'said aligned holes in'said main core fiat portion and lower mold toisecurely retain saidlcore to said lower mold and. an upper mold having/a cooperating hemi-liquid bag and neck and flat concavity to overliesaidcore and rubber covering thereof to mold the exterior of-said liquid bag with said lower mold. a o i i 9. Core means adapted to receive a cover of rubbenor otherp'lasticizable material to be vulcanized and/or molded and to lie therewith in a molding positionin a mold, including a main core portion of thedesired shape of the interior of the bag and of the thickness of'the bag except for the rounded edges and constricted' neck thereof having a-cut-out portionslightly offset from the vertical central line base portion, a center portion of less width, and an upper portion. of less width extending laterally on'one side of the. vertical centralline', thereof a slight distance and asubstantial distance on the other side. thereof, a supplemental core portion substantially complementalto the cut-out portion,

having a'complemental base, a center portion and an upper'portion of less width than said cut-out upper portion, extending from the second side 'of said'cutout to a line spaced from the vertical central line of said core an amount equal to the amountthat the firstside of said cut-out is spaced from said, vertical center, to form a; li uid bag wall forming slit extending vertically near the center of said composite core, and means to detachable secure said core portions together. j r

7' l0. Core-means adapted to receive a cover of rubber or other plasticizable material to be vulcanized and/or molded and to lie therewith in" amolding position in a mold, including a main'c'ore portion of the desired shape of the interior of the bag and ofthe thickness of the the rounded edges and constricted neck thereof having a cut-out portion slightly offset from the vertical central line thereof including a base portion, a center portion of less width, and an upper portion of less width extending laterally on one side of the vertical central-line thereof a slight distance and a substantial distance ontheo-ther side thereof, a supplemental core portion substantially co'mple mental to the'cut-outportion, having a complementalb'ase. a. center portion and an upper portion of less width than said cut-out upper portion, extending from the second side of said cut-out to a line spaced from the vertical central line of said core an amount equal to the amount that the first side of said cut-out is spaced from said vertical center, to form a liq-' uid bag wall forming slit extending vertically near the center of said composite core.

11. Core means adapted to receive a cover of rubber or other plasticizable material to be vulcanized and/or molded and to lie therewith in holes therein and having a cut-out portion slightly offset from the vertical central line thereof including a base portion, a center portion of less width, said base portion having holes projecting upwardly therefrom in said core and said center portion having vertical grooves extending laterally inwardly thereof, and an upper portion of less width extending laterally on one side of the vertical central line thereof a slight distance and a substantial distance on the other side thereof, said main core also having a hole extending vertically upwardly from' said second offset side of said upper cut-out portion to the top portion of said core, a supplemental core portion substantially complemental to the cut-out portion, having a complemental base having pins projecting vertically upwardly therefrom within said main core holes, a center portion having splines projecting laterally thereof within said main core grooves, and an upper portion of less width than said cut-out upper portion, extending from the second side of said cut-out to a line spaced from the vertical central line of said core an amount equal to the amount that the first side of said out-out is spaced from said vertical center, to form a liquid bag wall forming slit extending vertically near the center of said composite core, and a rod projecting from the upper portion thereof through said hole in said main bore and having a threaded end extending beyond the mold and the Wall, and a nut adapted to be threaded on said rod end to clamp said core portions together.

12. In a liquid bag molding apparatus, a lowermold having a hemi-liquid bag and neck concavity, core means adapted to receive a cover of rubber or other plasticizable material to be vulcanized and/or molded and'to lie therewith in a molding position in said lower mold, including a main core portion of the desired shape of the interior of the bag and of the thickness of the bag except for the rounded edges and constricted neck thereof having a cut-out portion slightly oifset from the vertical central line, thereof including a base portion, a center portion of less width, and an upper portion of less width extending laterally on one side of the vertical central line thereof a slight distance and a substantial distance. on the other side thereof, a supplemental core portion substantially complemental to the cut-out portion, hav-' ing a complemental base, a center portion and an upper portion of less width than said cutout upper portion, extendingfrom the second" side of said cut-out to a line spaced from the vertical central line of said core an amount' equal to the amount'that the first side of said cut-out is spaced from said vertical center, to

form a liquid bag Wall forming slitextending vertically near the center of said composite core, and an upper mold having arcooperating hemiliquid bag and neck concavity to overlie said I core and rubber covering thereof to mold'the exterior of said liquid bag with said lower mold,

means to detachably secure said core portions together and means to retain said core in position within said mold. 1

13. In a liquid bag molding apparatusja lower mold-having a hemi-liquid bag and neck concavity, core means adapted to receive a cover of rubber or other plasticizable material to be vulcanized and/or molded and to lie therewith in a molding position in said lowermold, including a main core portion of the desired shape of the interior of the bag ands ofthe thickness of the bag except for the rounded edges and constricted neck thereof havinga cut-out portion slightly offset from the vertical central line thereof including a base portion, a center portion of less width, said base portion having holes projecting upwardly therefrom in said core and said center portion having vertical f grooves extending laterally inwardly thereof, and an upper .portion of less width extending laterally on one side of the vertical central line thereof ,a slight distance and a substantial distance on the other side thereof, said main core also having a hole extending vertically upwardly from said second offset side of said upper cut-out portion to the top portion of ,7 7

said core, a supplemental 'core portion substantially complemental to the cut-out portion,

having a complemental base having pins projecting vertically upwardly therefrom within said main core holes, a center portion having splines projecting laterally thereof within said main core grooves, and an upper portion of less width than said cut-out upper portion, extending from the second'side of said cut-out portion to a line spaced from the vertical central line of said core an amount equal to the amount that the first side of said cut-out is spaced from said vertical center, to form a f i liquid bag wall forming slit extending vertically near the center of said composite core, and a rod projecting from the upper portion thereof through said hole in said main core and having a threaded'end extending beyond the mold end .wall, a nut threaded on said rod end to clamp said mold portions together and an upper mold havinga cooperating hemi-liquid bag and neck to overlie'said core and rubber covering thereof to mold the exterior of said liquid "bag with said lower mold. a v

- ANTONIO RICHARDS.

Images