US3669323A - One-way valve insert for collapsible dispensing containers - Google Patents
One-way valve insert for collapsible dispensing containers Download PDFInfo
- Publication number
- US3669323A US3669323A US884484A US3669323DA US3669323A US 3669323 A US3669323 A US 3669323A US 884484 A US884484 A US 884484A US 3669323D A US3669323D A US 3669323DA US 3669323 A US3669323 A US 3669323A
- Authority
- US
- United States
- Prior art keywords
- diaphragm
- way valve
- tubular body
- annular
- headpiece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D47/00—Closures with filling and discharging, or with discharging, devices
- B65D47/04—Closures with discharging devices other than pumps
- B65D47/20—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge
- B65D47/2018—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure
- B65D47/2031—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure the element being formed by a slit, narrow opening or constrictable spout, the size of the outlet passage being able to be varied by increasing or decreasing the pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
- B65D35/14—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor with linings or inserts
Definitions
- ABSTRACT A collapsible dispensing container tube having a thermoplastic headpiece united to a tubular body with a one-way valve insert positioned in the upper part of the tube to perform an anti-suck-back function by blocking the flow of air into the tubular body when manual pressure on the tubular body is released after the dispensing of a desired portion of product from the tube.
- the present invention relates broadly to collapsible dispensing containers, and is more particularly directed to a one-way valve insert capable of performing an anti-suck-back function, which is positioned inside and at the head end of the collapsible dispensing container.
- the one-way valve insert comprising the present invention features new and improved means, forming an integral part thereof, for retaining the insert in its desired position in the collapsible dispensing container independent of the presence of product therein. Further, the portion of the insert forming the one-way valve has a new and improved opening fabricated therein providing an improved one-way opening and closing action of the valve.
- This improved one-way valve action allows product in the container to be easily and readily dispensed therethrough by squeezing the tube in a conventional manner. Then, when the squeezing pressure on the tube is released, this improved one-way valve action prevents air from being drawn into the tube, and, in addition, product contained in the container remains near the tube head for subsequent dispensing applications.
- the plastic collapsible tube body by virtue of its inherent residual resiliency, makes what may be regarded as a spontaneous residual recovery when the squeezing pressure is relaxed thereby causing residual or undispensed product in the tube neck and upper regions of the tube body to be drawn or sucked into the more distant regions of the container.
- the suck-back of residual product simultaneously causes air to be sucked into the tube body before the container closure can be replaced thereon.
- a second reason is that through inadvertence the container closure is often not replaced when dispensing is completed. Since by the suction effect above-described at least the tube neck passage is void of product, the product contents within the container body are exposed to the drying effect of atmosphere concomitant with the above-mentioned losses in the quality of the product.
- a third detrimental effect is that air must be dispelled from the tube before dispensing the product on subsequent uses. Subsequent dispensing of a desired quantity of product, which, because of the above-described suction effect has receded some distance from the dispensing orifice, requires repeated squeezing of a kneading action to advance the product toward the dispensing orifice. This is laborious and time-consuming, and if the tube body is opaque, as is often the case, repeated squeezings frequently result in the expulsion of more product than desired.
- U.S. Pat No. 1,122,868 to Davis proposes a one-way disk valve unsupported except by the product contained in the tube (called a floating" disk).
- a disadvantage of this proposed solution is that the floating" nature of the one way disk valve contributes to its probable dislocation from its desired operative position after repeated dispensing of tube product by the effect of residual reverse product flow or suckback occurring simultaneously with the release of squeezing pressure upon the tube.
- U.S. Pat. No. 1,607,993 to Loewy proposes a one-way closure valve retained in the neck of a container tube by the pressure of product against its flanged bottom.
- the disadvantage of this proposed solution is the probability that, like the disk valve above-discussed, the closure valve would become dislocated from its desired operative position in the neck of the tube.
- the present invention provides a simple, unitary insert structure, capable of being snugly engaged with both the upper tube body and the lower tube neck, which is not susceptible to dislocation from its desired operative position and does not require a permanent anchoring arrangement to retain it therein.
- the one-way valveinsert forming the present invention is a plasticunit, thermoformed or injection molded from a suitable thermoplastic material, with a die-cut opening of a desired configuration in the diaphragm portion of the unit.
- a cutting die with a slightly radiused or blunted cutting edge may be used to produce a feather-edge cut which improves the one-way opening and closing action of the valve as compared to a clean cut produced by a sharpedged die.
- the new and improved unit structure comprising the present invention is dimensioned to be anchored in its desired operative position in the tube, independent of the pressure provided by the presence of product contents therein, by a frictional fit of two separate annular areas of the unit respectively to two separate areas of the container tube.
- the present invention eliminates the need for additional anchoring orsealing-in features and the dependence upon the presence of product in the container tube.
- FIG. 1 is a side elevational view of a collapsible dispensing container tube embodying the new and improved concept of FIG. 5 is an enlarged fragmentary sectional view taken substantially along the line 5-5 of FIG. 2, illustrating a featheredged cut;
- FIG. 6 is an enlarged partial top plan view of the insert, schematically illustrating the particular configuration of the cut in the diaphragm of the insert shown in FIG. 2;
- FIGS. 7-12 are enlarged partial top plan views of the insert similar to FIG. 6, schematically illustrating modified configurations of the cut in the diaphragm of the insert.
- FIG. 1 DESCRIPTION OF THE PREFERREDEMBODIMENT Illustrated in FIG. 1 is a collapsible dispensing container tube embodying the new and improved concept of the present invention as illustrated by the broken-line outline of a one-way valve insert, generally designed 21 (see FIG. 2), positioned in the upper part of the tube.
- the upper section of the collapsible dispensing tube 20 comprising a tubular body 22 connected at its upper end to a headpiece, generally designated 24.
- the tubular body 22 may be of any suitable material capable of containing and protecting the product contents of the tube, such as flexible, resilient plastic or composite laminate material for high viscosity or paste-like products, and also capable of thermally uniting with the headpiece 24.
- the headpiece 24, of a readily moldable thermoplastic material such as polyethylene, includes a neck 26 surmounting a breast 28.
- the neck 26 has an orifice 30 leading from its upper end into a central bore 32 in the neck 26, the central bore 32 further communicating with the hollow interior of the collapsible tube 20.
- the neck 26 is externally screw threaded to receive a screw cap 34 for closing the orifice 30.
- the breast. 28 of the headpiece 24 is thermally molded about its peripheral band area 36 to'the upper interior wall 37 of the tubular body 22.
- the insert structure includes a one-way valve 40 fabricated in a closure diaphragm 42 which is supported by a small annular head 44, the head 44 being further supported by a conical annular body, generally designated 46.
- the conical annular body 46 has a large annular base 48 and a conical annular shoulder 50, and, further, a trunk 52 which connects the base, 48 with the shoulder 50.
- the insert 21 in its desired operative position is illustrated in FIGS. 3 and 4. It can be seen therein that the exterior surface of the base 48 is contiguous with the interior surface 53 of the tubular body 22, and frictionally fit therewith. Also, as shown therein, the exterior surface of the head 44 is contiguous with the lower interior surface of the neck 26, and frictionally fit therewith. At these two contact areas, since the insert structure is frictionally fit to the container, the need for additional 1 anchoring or sealing-in features is thereby eliminated. Additionally, as shown in FIGS. 3 and 4, the exterior surface of the shoulder 50 is contiguous with the interior surface of the breast 28.
- the one-way valve 40 may be fabricated in the closure diaphragm 42 of the head 44 by the use of a cutting die. If desired the die may have a slightly radiused or blunted cutting edge to provide the closure diaphragm 42 with die-cut feather edges 54, defining an opening 56 of a certain specified configuration.
- the feather edges 54 illustrated in FIG. 5, have a reduced cross-sectional area of contact, as compared to that of sharp edges which are produced by a cutting die with a sharp cutting edge. This improves the one-way opening and closing action of the valve by reducing the area of frictional resistance between the edges. Consequently, the one-way valve 40 is more sensitive to application of squeezing pressure on the tubular body 22 during dispensing.
- the container is uncapped and the product is easily and readily dispensed through the feather-edged die-cut opening 56 of the insert 21 by the application of squeezing pressure to the tubular body 22 in a conventional manner.
- the inherent resilient bias of the one-way valve 40 to retain its original closed position transversely of the head 44 will be overcome and the one-way valve 40 will remain open.
- the inherent resilient bias of the valve 40 causes it to return to its original closed position.
- the subsequent back pressure produced by the inherent residual resilience of the tubular body 22, which results in the suck-back of air is prevented from occurring with the desired result that the one-way valve action prevents air from being drawn into the tubular body 22.
- FIGS. 6-12 there is schematically illustrated the various feather-edged die-cut configurations which the one-way v valve can take, all of which suitably perform to achieve the desired results of the present invention.
- One configuration of the one-way valve opening is in the form of a spiral having a long increasing radius (FIGS. 2 and 6). Another configuration of the one-way valve opening is in the form of a spiral having a short increasing radius (FIG. 7). Yet another configuration of the one-way valve opening is in the form of a large H (FIG. 8). A further configuration of the one way valve opening is in the form of a cross (FIG. 9). Another configuration of the one-way valve opening is in the form of an eight-pronged star (FIG. 10). Still another configuration of the one-way valve opening is in the form of a sixpronged star (FIG. 11). A still further configuration of the one-way valve opening is in the form of two semi-circles, positioned tangentially at the midpoint of their circumferences (FIG. 12).
- a one-way valve insert comprising:
- annular base positioned contiguous with the interior surface of the tubular body, frictionally engaged therewith, and adjacent to the lower end of the conical breast of the headpiece;
- annular head positioned contiguous with the lower interior surface of the neck of the headpiece, frictionally engaged therewith, said head connected at its lower end to the upper end of the conical annular shoulder;
- a closure diaphragm positioned transversely of the upper end of the annular head and connected thereto at the outer edge of said diaphragm, said diaphragm being spaced remote from the dispensing end opening of the container tube, said diaphragm having a die-cut opening therein such that a portion of said diaphragm forms a oneway valve so that upon compressing the tubular body to dispensea portion of the product therefrom said product pushes against the diaphragm causing the one-way valve to flex open towards the dispensing end opening of the tube permitting the product to dispense therefrom, and, upon releasing the tubular body to cease dispensing the product therefrom, the product ceases to push the diaphragm, the resilience of the one-way valve causing said valve to close preventing air from being drawn into the interior of the tubular body.
- a one-way valve insert capable of being placed in a collapsible dispensing container having a flexibly resilient tubular body and an annular headpiece, said headpiece having a neck with a dispensing end opening and a breast with its lower end connected to said tubular body, comprising:
- annular base adapted to be positioned contiguous with the interior surface of the tubular body in frictional engagement therewith, adjacent to the lower end of the breast of the headpiece;
- a conical annular shoulder adapted to be in contact with the interior surface of the breast of the headpiece
- a conical annular trunk connecting the upper end of the annular base to the lower end of the conical annular shoulder, said trunk adapted to be radially inwardly spaced from the annular location of connection between the lower end of the breast and the tubular body;
- annular head adapted to be positioned contiguous with the lower interior surface of the neck of the headpiece in frictional engagement therewith, said head connected at its lower end to the upper end of the conical annular shoulder;
- a closure diaphragm positioned transversely of the upper end of the annular head and connected thereto at the outer edge of said diaphragm, said diaphragm adapted to be spaced remote from the dispensing end opening of the container tube, said diaphragm having a die-cut opening therein such that a portion of said diaphragm forms a oneway valve capable of a flexing action above said diaphragm position.
Abstract
Description
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US88448469A | 1969-12-12 | 1969-12-12 |
Publications (1)
Publication Number | Publication Date |
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US3669323A true US3669323A (en) | 1972-06-13 |
Family
ID=25384714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US884484A Expired - Lifetime US3669323A (en) | 1969-12-12 | 1969-12-12 | One-way valve insert for collapsible dispensing containers |
Country Status (3)
Country | Link |
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US (1) | US3669323A (en) |
CA (1) | CA933898A (en) |
ZA (1) | ZA707439B (en) |
Cited By (112)
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Publication number | Publication date |
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CA933898A (en) | 1973-09-18 |
ZA707439B (en) | 1971-07-28 |
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Owner name: AMERICAN NATIONAL CAN COMPANY, STATELESS Free format text: MERGER;ASSIGNORS:AMERICAN CAN PACKAGING INC.;TRAFALGAR INDUSTRIES, INC. (MERGED INTO);NATIONAL CAN CORPORATION (CHANGED TO);REEL/FRAME:004835/0354 Effective date: 19870430 Owner name: AMERICAN NATIONAL CAN COMPANY Free format text: MERGER;ASSIGNORS:AMERICAN CAN PACKAGING INC.;TRAFALGAR INDUSTRIES, INC. (MERGED INTO);NATIONAL CAN CORPORATION (CHANGED TO);REEL/FRAME:004835/0354 Effective date: 19870430 Owner name: AMERICAN CAN PACKAGING INC., CONNECTICUT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AMERICAN CAN COMPANY, A NJ CORP.;REEL/FRAME:004835/0338 Effective date: 19861107 Owner name: AMERICAN CAN PACKAGING INC., AMERICAN LANE, GREENW Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMERICAN CAN COMPANY, A NJ CORP.;REEL/FRAME:004835/0338 Effective date: 19861107 |