US2784878A

US2784878A - Pressurized paste dispensers

Info

Publication number: US2784878A
Application number: US542159A
Authority: US
Inventors: Ignatius E Theodorou
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-10-24
Filing date: 1955-10-24
Publication date: 1957-03-12
Anticipated expiration: 1974-03-12

Description

March 12, 1957 E. THEoDoRou 2,784,878

PRESSURIZED PASTE DISPENSERS Filed Oct. 24. 1955 United States Patent i 2,734,878 rREssURIzED PASTE DISPENSERS Ignatius E''Iheodorou, Haverhill, Mass. Application october`24, 195s, serial 10,542,159 s claims. (Cl. zzz- 95) This invention'frelates to improvements in paste dispensers and more particularly to pressurized paste dispensers lt has been proposed heretofore "to :provide pressurized paste dispensers wherein gas under pressure constantly is active tending to eject paste and effective for ejecting the pastewlrenever the mouth of the dispenser 'is opened. In some cases, `the gash-as `acted onza piston or plunger which directly engages the paste and which maintains the paste constantly under compression rea-dy to discharge when the mouth of 'the dispenser4 is opened. Another variety of prior pressurized paste dispenser has had the paste within a llexible and collapsible container mounted loosely within the lmain chamber ofthe dispenser with gas under` pressure within the irlin chamber and cnstantly tending to squeeze land collapse the paste holding container. Hereagain the paste "is eitpected to`be ejected when the dispenser mouth is opened.

`It is among the objects ofiny present inventiontoprovide a pressurized paste dispensen'whe'rein fluid under pressure is maintained apa-rt `from the paste :and `acts on the paste only periodically Ifan-d `'momentarily when the dispenser is manually operated. According to the invention, the paste normally is in a relaxed state in which it assumes a natural position of ease within its container, and ejecting `fluid pressure `acts upon or is `transmitted to the paste only momentarily whenever the dispenser is manually operated. K Y Another object of the invention is to `provide a pressurized paste dispenser wherein thepaste 'and uid under pressure are in separate compartments of the dispenser, and wherein there is manually operable means for simultaneously opening a Huid passage from the pressure iluid compartment intothe paste compartment thereby to effect fluid pressure ejection of paste until the manually operable means is released, there being spring `meansfor restoring said means to its condition closingsaid fluid` passage and `for simultaneously venting the pastecomp'artment to atmosphere when the manually operable means is released.

A further object of the invention is toprovide'a pressurized paste dispenser wherein the paste continues non-toxic within -the dispenser for `an indefinite period of time.

-It is, moreover, my purpose and object generally to improve the structure and `effectiveness `of pressurized paste dispensersby subjecting the paste to ejecting pressure only momentarily at the desire-d times of paste ejection.

In the accompanying drawing:

Fig. l is a medial crosssectional View of a paste dispenser embodying features of my invention, a conventional variety Iof paste tube 'being' shown 'in elevation;

Fig. 2 is `a View generally similar to Fig. 1 but showing the valve means in manually actu-ated conditions, as when paste is being ejected or dispensed; and` p Fig. 3 is a medial cross-sectional view of a modied form of paste dispenser embodying features of my invention.

ice

4 Referring `to *thefdrawing 'the `dispenser vlt) may fbe formed oiffsheet metalor any other suitable material. In teriorlyythe dispenser `is divided-'by wall 12to"proV-ide two compartments or chambers `i4, ld of which the chamber 14 preferably will 4have dimensions for accomodating a` conventional tube 18-of tooth paste or any other paste orpaste-like substance. It should be understood, however, that the paste may be within a tube or `other container having any of various shapes and sizes so long asftlie tube or container walls areoffanature'to yield 'underpressure toeject paste through `the outlet passage in neck 20. Also, it should 'be understoodit-hat the features of the invention may be employed in'conjunction with -the well vknown plunger `or piston principle of ejection, as suggested in Fig. 3. w l

As represented in Figs. 142,? the dispenser l0, at one end thereof, has a relatively large opening 22 therein which is closed by the screw-on cap 24. Cap 24 lhas a central opening for `freelyaccommodatingthe -necklt of 'the tube, anda nut `216 may be screwed eXterioily on 'neck 20 to securelthet-ube to the cap 24, preferablyfwith a -ga'sket'28,o`r other sealing material, interiorlyor` the cap, foreifecting a `duid-tight seal around -neck 2u and between cap` 24 and the adjacent dispenser walls when the cap is sctewed tightly in Iplace.

Fluid underpressure is within compartment or chamber 16, and interior wall 12 thas valve means therein whereby pressure fluid from chamber ltrmay be admitted rto chamber 14 for applying squeezing pressure to the'tube `18 when it is desiredto ,ejecty 1paste from Ithe tube. As `herein represented, the valve ineens comprises-a relatively thick resilient gasket 30,of 4rubbenfor the like, retained in an opening in'wall 112, in cnjunction with a relatively rigid supporting element732. A tubular valveunember 34 extends s'lidably thrughlelementl and gasket 3d. Valve `member 34 has `an enlarged end V portion adjacent to Vgasket 30 with `an inclined wall'portion 35 providing an -openingat 36 into `the rinterior of the tubularvalve member '34. "A `generally similar but reversely arranged enlargementat the other end of valve member 34 has an inclined wall `portion 3S providing anfopening at 38 `into the interior of the valve member 34. A springdi) engages between element 32 and an abutment 42 on the valve member constantly `biasing Athe latter to its position of Fig. l wherein the opening 36 is closed by'the gasket 30 sealing' the valveniember 34 against flow therethrough from chamber 16 to `chamber 14. "However, when the valve member is moved in direction toluncover the opening 36, gas or other iluid under pressure in chamber 16 can enter the valve member through opening 86, pass longitudinally within the tubular valve member and discharge through opening 38, which always is open, into the chamber 14.

A `seco'ndvalve means `is mounted in 1the lower end wall 44 of the dispenser, as viewed in Figs. 1 and 2. This valve means comprises a relatively thick resilient gasket 46, of rubber, or the like, retained in "an opening in'wall 44, in conjunction with a relatively rigid supporting element 48. A tubular valve member 50 extends slidably through element 48 and gasket 46 and has shape generally similar tothat of the previously described valveinember 34. One `enlarged end of valve member 50 is located exteriorly of end wall 44 and constitutes `a button at 52 which may be actuated by linger pressure 'to move valve member 50 inwardly of the dispenser. A rigidrodv54 connects -the valve members V34, 59 for Vm'ovenient in unison so vthat a linger actuation `of valve member 50 is 1ccompanied by a corresponding actuation of valve" meme1" 3'4.

One of the enlarged end portions of valve member 50 has an inclined surface 51 providing an opening 56 into the interior of the valve member. The other enymaterial or seep past the piston member 62.

larged end portion of this valve member has an inclined surface 51', adjacent to gasket 46, providing an opening 58 into the interior of the valve member. These two

openings

56, 58 normally are open providing a vent passage through valve member 50 from chamber 14 to atmosphere. However, when valve member 50 is manually actuated from its Fig. 1 position to its Fig. 2 position, opening 56 becomes sealed by gasket 46 and remains sealed as long as valve member 50 is manually held in its Fig. 2 position. Simultaneously, the other valve member 34 moves to uncover the opening 36 within chamber 16 and pressure fluid is admitted through valve member 34 into chamber 14 from chamber 16, to apply squeezing pressure to the paste container and a resulting ejection of paste through neck 20. As soon as valve member 50 is released, spring 40 restores the valve mem` bers to their Fig. 1 positions in which opening 36 is closed, cutting off flow between the chambers, and

openings

56, 58 are open for venting chamber 14 to atmosphere.

Any suitable readily openable cap 60 may be provided for the paste container opening in neck 20.

Fig. 3 shows a modification wherein the paste is dif connection with the drawing, 'that I have provided a 'l pressurized paste dispenser wherein gas or other fluid under pressure is transmitted to the paste only momentarily at times of actuation of button 52. At all other times, atmospheric pressure prevails around the paste container 18 in the Figs. 1 and 2 embodiment, and on vthe piston member 62 in the Fig. 3 embodiment. Hence,

the paste during periods between actuations of button S2 is in a natural u-n-pressurized condition of ease within its container ready for eiiective response to ejecting pres- Also, by relieving the paste of constant substansure. tial pressure, the paste-ejecting gas or other fluid under pressure does not penetrate through the container wall Hence, the paste continues indefinitely in a non-toxic condition within the dispenser, which makes it feasibleV to dispense yfood in paste form, and various other paste materials which must be maintained in a non-toxic condition.

Various changes in details of the disclosed dispensers Ymay be made within the scope of the appended claims,

and it is intended that the patent shall cover, by suitable expression in the appended claims, whatever features of patentable novelty exist in the invention disclosed.

I claim as my invention:

l. A paste dispenser comprising walls delining a fluid pressure chamber and a chamber for holding a supply of material in paste form, means defining an outlet in a wall portion of said vpaste holding chamber, valve means `operable to open a passage for flow of fluid under Vpressure from said liuid pressure chamber into paste-ejecting relation to the paste in said paste holding chamber,-

resilient means constantly biasing said valve means to a position in which it closes said liow passage, manually operable means connected to said valve means for actuating said valve means in opposition to its said bias thereby to open said flow passage, and means for venting said paste holding chamber to atmosphere in response to each movement of said valve means to its position closing said ow passage.

2. A paste dispenser comprising walls dening a lluid afsasrs pressure chamber and a chamber for holding a supply of material in paste form, means defining an outlet in a wall portion of said paste holding chamber, valve means including one valve element movable between a position in which it seals the dispenser against ow of pressure fluid between said chambers and a position in which fluid under pressure can liow from said fluid pressure chamber into said paste holding chamber thereby to eject paste through said outlet, said valve means also including a second valve element rigidly connected to said one valve element and arranged and adapted to eifect venting of said paste holding chamber to atmosphere whenever said flow passage is sealed and to seal said paste holding chamber against outflow of pressure fluid therefrom whenever said flow passage is open.

3. A paste dispenser comprising walls dening a fluid pressure chamber and an adjacent chamber for holding a compressible container of paste, means providing an outlet passage through which paste may be ejected from said container and the chamber in which the container is held, manually operable valve means movable to release pressure iiuid from the iiuid chamber into said adjacent chamber whereby the released fluid under pressure squeezes said paste container to eject paste through said outlet passage, a spring constantly biasing said valve means to a position in which it seals said uid pressure chamber against flow of pressure fluid therefrom into said adjacent chamber, and means responsive to operations of said valve means for venting said adjacent chamber to atmosphere whenever said fluid pressure chamber is sealed against outflow and for sealing said adjacent chamber against outow of pressure fluid therefrom whenever said valve means is operated to release pressure fluid from said fluid pressure chamber into said adjacent chamber.

4. A paste dispenser comprising a closed receptacle, a

fcompressible container of iiuid material supported within said receptacle and having an outlet passage extending through a wall portion of the receptacle, means defining an iniiow passage for inflow of pressure fluid to the insaid container to material-ejecting iiuid pressure within 'said receptacle while said receptacle is sealed against escape `of pressure fluid therefrom, and movable in the `opposite direction for simultaneously closing said inflow passage and opening said Venting passage thereby to relieve said container of material-ejecting pressure.

5. A dispenser comprising walls defining a iluid pres- 'sure chamber and a chamber for holding a supply of ma- `terial in a iiuid state, means deining an outlet in a wall 'portion of said material-holding chamber, valve means operable to open a passage for flow of uid under pressure from said tiuid pressure chamber into material-ejecting relation to the material in said material-holding chamber, resilient means constantly biasing said valve means to a position in which it closes said ti'ow passage, manually operable means connected to said valve means for 'actuating said valve means in opposition to its said bias thereby to open said flow passage, and means for venting 'said material-holding chamber to atmosphere in response to each movement of said valve means to its position closing said iiow passage.

References Cited in the ile of this patent UNITED STATES PATENTS 59,188 Compton Oct. 30, 1866 103,498 Pohlmann May 24, 1870 1,996,792 Bystricky et al. Apr. 9, 1935