US1631931A - Dispensing container for plastic substances - Google Patents

Description

June 7,1927. v

2 Sheets-Sheet 1 gnvento, @2X/mi, eaZ' e nlblvrnllIllnlIllllllallllaIf lll! W. H.v G. GEAKE DIsrENsING CQNTA'INER FOR PLASTIC sUBsTANcEs Filed Nov. 10, 1925 Junev '7 1927. 4 J

w. H. G. GEAKE DISFENSING CONTAINER FOR PLASTIC SUBSTANCES Filed Nov. 1o, 1925 2 sheets-sheet. 2

Patented June 7, 1927.

UNITED [STATES PATENT OFFICE;

WILLIAM H. G. GEAKE, OF KILLABA, NEAR SYDNEY, NEW SOUTH WALES, AUSTRA- LIA, ASSIGNOR TO WALTER RUTHEBFORD, OF LONDON, ENGLAND, AND JOHN BAIN, OF OTTAWA, CANADA.

DISPENSING CONTAINER FOR PLASTIC SBSTANCES.

Application iled Noyember 10, 1925, Serial No.

This invention relates to dispensing containersfor plastic substances and particularly to that type of container from'which the contents are expelled by torsional diminntion in the volume of the container.V

lhe principal objects of the invention are to construct a'torsionally collapsible container in which ,shortening of the container along the axis ot' twist does not occur and 1o therefore does not have to 'be compensated for; to produce a dispensing container in which the torsional fulcrum adjacent the discharge end is free from torsional stress until substantially the entire contents of the cony tainer have been expelled, therefore avoiding imprisonment of a portion of the contents between upper and lower twisted por! tions of the container; to provide a container 'of the class described in' which the torsional stress is directed in radial lines y lying in planes transverse to the axis of twist,

which -progressively approach the discharge end of the container sothat the body or. contents diminishes only `\in a depthl direction until substantially all of the contents are expelled, the. twisting. of the container taking place entirely below the body of contents;

to construct a dispensing container including relatively rotatable cooperating rigid torsionally emptied sack, preferably of nonelastic material, anchored to `both members and twisted by rotating said members, and

to provide for the adhesion .of lateral por" tions of said sack to corresponding parts of one of said members, preferably that having the discharge opening, the sack being progressively torn away from its adhesive bond with said member when relative rotation is im )arted ,to said members. i

ther objects will appeary as the follow,- ing description of illustrative embodiments thereof proceeds.

Vhile a dispensing container suoli as the Figure l is a. vertical section'through a.

members forming achamber in which is a present inventlon contemplates may be used 68,225, and in Great Britain September 22, 1925.

container embodying the principles of my Figure 6 is in part a vertical section and in part an elevation of still another form of the invention.

Figure 7 is a plan view of the anchoring disk for securing the mouth of the sackl to helower of the relatively rotatable mem' ers.

Figure 8 is a vertical section through the lower portion of still lanother form of container in which a key takes the place of one of the dished-members shown in the previous embodiment.

in Figure 8, viewed from beneath.

ures and tirst adverting to that form of the invention shown in Figures l, 2 and 3, 1 and 2 represent telescoped members, freely relatively rotatable, the former being regarded as the top and having. a discharge nozzle 3. Said members together form a chamber in which is housed a sack 4, the latter consisting preferably of flexible butnon-elastic material, such as muslinjor other fabric, certain grades of paper or any suitable substance. size that, when filled with the plastic con- Figure 9 is a plan view of the key shown Said sack is made of such Referring now in detail to the several tigtents which the container is designed to dispense,` it lits-the chamber between the members l and 2. The bottom of the sack is secured to the member 2 by means adapted to impart a torsional stress to the sack when the members are relatively ro tated, butto avoid the possibility of a. pivotal action between the Sack and said mem- ,her, which latter action'would constitute a ent instance the fixing means includes a metallic' disk 5 bearing against the inner face of the bottom of the sack and riveted in two places as at 6 and 7, throughthe bottoni member 2. The upper or openend of the sack mayl be secured adjacent the nozpzle in any suitable fiuid tight manner, one expedient being shown in Figure 1 in which the top member is provided with a `circular opening 8 through which projects a bushing 9 having a flange 10 atiits lower end underlying the edges of the opening 8, said bushing constituting the 'discharge nozzle. The openmouth of the sackis brought around the liange 10 into contact with'the exterior of the bushing 9, being held in place by a resilient ring or washer 11 which surrounds the mouth of the sack and the bushing 9 and preferably fits within the opening 8. A cap 12 screws upon the bushing 9 and holds the flange 10, the marginal edge of the sack, the top member l and the ring 11 in compressive relation. container leak-proof during shipment or when it is not in use. When the contents are to be expressed from the container the cap l2 is removed, andthe pressure of the contents against the flange 1() then suffices to maintain af/tightfjoint between the parts.

The joint between the sack and nozzle is preferably not depended upon to resist the .torsionalstress imparted to the sack by ro- -tation of the bottom member 2. Instead, the side vwalls of the sack and, if desired, the top wall thereof, are caused to adhere to the corresponding walls ofthe member l. by the application of any. suitable adhesive to said walls or to said sack. In the present instance a coating of suitable substance such as shellac, the saine being desig-l nated by the reference character 13, is applied to the interior lateral and top surfaces 'of the member 1 before thesack is put in place.l

In operation, when the top member 1 is grasped and the bottom member 2' rotated relatively thereto a twisting stress is im,-V

parted to'the lower portion of the sack which is resisted by the adhesive bond between the lateral wall of the sack and that of the member 1', said bond giving way first adjaalluexpelled. The condition of the sack at the time of substantially complete expul- This suiiices to render the"V sion is'shown in the upper .part of Figure 3, and an intermediate position ofthe sack is shown in the same figure in dotted lines.l

i It is to be understood that the torsional stress isv borne entirely by the adhesive between the sack and member 1 'throughout the act of expulsion of the contents thereof, the joint adjacent the nozzle being entirely relieved from stress. The adhesive also functions to localize the twist at the lower end of the sack so that there is no risk of the contents of the sack or a portion thereof being imprisoned between twists simultaneously formed both at the upper and lower ends of the sack, such as might ordinarily occur in the absence of the novel features of my invention.

It is possible to obtain considerable pressure at the nozzle in the expelling operation practiced in using the container since the mechanical advantage is substantially the ratio between the radius of the lower rotatable member, and that of the diameter of the twisted portion or r .ck of the sack. When it is realized th .i f a material such as fabricated cloth or paper is weak only in the direction of shearing stress but enormously resistant to tension, and that in the application of torsion to a sack constructed of any of these materials, it is tension and not shearing stress that predominates, it becomes apparent that great pressure may be applied torsionally to the sack without rupturing the saine, so that the container may be used directly as a grease gun in forcing the' grease into bearings or other places. Thus my dispensing container functions as a combined container and grease gun, thereby avoiding the messy condition attending the transfer of grease from an ordinary can to the barrel of a separate grease gun.

In such attempts as have heretofore been made to apply the torsional principle of ex- .pulsion to inelastic containers, means had to be provided to compensate for the shortening of the sack in the-direction o f the axis of twist. These lmeans sometimes included a spring by which the bottom of the sack was attached to the lower rigid member. In such cases when the sack is twisted the spring elongates. Furthermore, it was -thought that the torsional member could not be practically applied to a cylindrical sack on account of the formation of a twist at both ends imprisoning the contents, so that in experimental attem ts heretofore made,

the sack hasbeen ma e conical, or smaller at the bottom than at the top. I have avoided the complication and expense inherent in the use of springs or other compensating devices, and the inefliciency'due to loss of space where the sack was made smaller :it oneend than at the other, by making the sack of a transverse dimension substantially as great or greater than the length of the axis of twist. The additional material required for the twist is then derived by drawing in the side Walls of the sack and not by drawing upon the top and bottom walls, as has been the case in former constructions.

, In Figure 4 I have shown a slightly difierent form of the invention in which the excess in the transverse dimension of the sack over the length of the torsional axis thereof is emphasized, the only other dili'erence between y,this form and that previously described being. in the means for securing the open mouth of the sack to the nozzle..4 In the present instance the nozzle 14 is made integral with the top member 1 and' the mouth of the sack is brought up insideotthe nozzle and is clamped tothe inner wall of the nozzle by an expansble ring 15.

The filling ot both forms ot collapsible.

container may be advantageously accomphshed by lforcing the contents thereof through the nozzle while the sack ism a com- .pletely flat and collapsed condition.' The sack expands under the pressure of the contents, excluding air spaces and pressing the outer surface of the sack-into contact with the walls of the chamber' Within the .igid members, causing it to adhere tol the adhesive coating with which said walls have been treated. Y,

A form of the invention is shown in Fig. 6 in which the sack is inverted so that an iinperlj'orate portion 16 'thereofoccurs -in ,registry with the nozzle,"mal-;ing the container self-sealed when assembled. Before expelling the contents from this sack, the

imper'f'orate portion lo must be punctured by the user in any suitable manner. In securing the sack to the lower member 2, it is first filled, then, the mouth portion is drawn through aslot`l7 formed in a disk 18, said disk being then "riveted to the bottom o f the member 2 at separate points 19 and 20 Y with the marginal edges of the sack clamped in leak-proof manner between said`sack. This insures against a pivotal movement taking place between'the sack andA the lower member. Means other than the disk 18 may be employed for securing the 'sack to said lower member. 'It is of course understood that,at the time the sackis filled and attached to the member 2, it is of elongated shape so as to permit access of a riveting machine to said disk for the purpose of rive eting the latter in place. The shape of the sack is nalized only-when it is compressed between the upper and lower members 1 and 2 in the act of assembling the container.

In Figure 8 I have shown an embodiment of the invention in which the sack-housing chamber is formed entirely of a single member, designated by the `reference character 21, the lower part onlyof which is shown. The bottom of said member-is apertured for the insertion of the shank of a key 22, which f erably `tormed with an elongated slot 23 into which the marginal edges of the mouth of the sack are inserted, the sides of lthe slot being then mashed together to seal the mouth ofthe sack and hold it against pull-` ing away when the key iswrotated. The bottom ot the -member 21 is preferably (lished to make room for the key so that the container may rest upon a fiat base. l

In. all forms of the invention it is preferred that the sack be attachedadhesively to the side wallso'f the enclosing rigid member toobtain the advantages hereinbet'ore. ascribed to this construction.

` lVhile I have herein described what I believe to be practical applications of the inventive principle, it is to be understood that numerous alternative constructions and arrangements of parts may be resorted to with' out violating the spirit or scope of the invention as defined in the appended-claims.

I-Iaving described my invention -what I claim as new and desire to secure by Letters Patent, is l 1. A dispensing container includin relatively rotatable rigid members, a torslonally collapsible sack arrangedbetween said members and fixed direct to each at its top and bottom, said sack having an axial dimension less than its dimension in a plane transverse to its axis, and being adapted to dischar e its contents through van aperture suitabIy formed in one oi' said members.

2. A dispensing container includin relatively rotatable rigid members, a torsionally collapsible sack arranged between said members' and firmly secured'to Leach at its top and bottom substantially in the line of axial twist of said sack, one of said members being hollow to receive said sack and means detachably securing said sack to the interior ot said hollow member and serving, `while said members are relatively rotated, to prevent torsional stress upon thesack at'the point at which said sack is firmly secured to said hollow member, until the sack is substantially collapsed, said sack being adapted to discharge through an aperture suitably formed in one of said rigid members.-`

3. A dispensing container including relativelyrotatable rigid members, a torsionally collapsible sack arranged between said members and firmly secured to each at its top and bottom substantially in the line of axial ll5 Y yielding to torsional stress. beginning at the loweredge of said bonded zone, when said rigid members are relatively rotated,-there by relieving'the point at which said sack is firmly secured to said hollow member from torsional stress until .the sack is substantially collapsed, said sack being adapted to discharge through ali-,aperture suitably formed; in one of said rigid members.

4. A dispensing container including coe operating relatively rotatable members, a torsionally collapsible sack between said members, secured to ,one member by an adu J* hesive bond, and means constructed to seal the mouth of said sack and to secure it to the other member, to impart torsional stress to said sack when said members are relatively rotated, said sack being adapted to discharge through an aperture suitably formed in one of said rigid members.

5. A dispensing container including co-A being hollow and having 'a discharge nozzle,

a torsionally collapsible sack between said members having an imperforate portion thereof confronting said noZzle-andsecured to the inner Wall of 'said hollow member by adhesive bond, and means constructed to seal the mouth of said sack and to Secure it to the other member to impart torsional stress to said sack when said members are relaf Intestimony whereof I have hereunto set my hand.

WILLIAM H. G. GEAKE.

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