US3648903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible wall dispenser with valve for air vent
Assignee: Graham Packaging Plastic Products Inc
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Filing: 1970-04-29
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Granted: 1972-03-14
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Expires: 1990-04-29
Abstract
Abstract A plastic container having flexible sidewalls adapted for dispensing viscous, fluid materials. The container is provided with a generally cylindrical neck which receives a dispenser plug having a cylindrical skirt frictionally engaging the inner wall of the neck. The plug has a top wall with a central opening and a central downwardly projecting inner skirt depending from the underside of the top wall. A flexible tube is attached to the lower portion of the inner skirt and extends into the bottle. The top wall of the plug is provided with air inlet openings which are closed by a slidable check valve carried by the inner skirt. When pressure is applied to the flexible sidewalls, air flow moves the check valve into the closed position and forces the contents of the containers through the dip tube and out the central opening in the plug.
Inventors
- 👤 Paul A Marchant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:45
CPC Classifications
B; B05; B05B; B05B11/00; B05B11/01; B05B11/04; B05B11/047
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
187 words
In a flexible wall plastic dispensing container the combination comprising: a. a plastic container having flexible sidewalls and a generally cylindrical neck with a neck opening therein; b. a dispenser plug having a cylindrical outer skirt frictionally fitted in said neck opening, said plug having a top wall joined to said outer skirt, a cylindrical opening in said top wall, and an axially aligned integral inner cylindrical skirt surrounding said cylindrical opening and depending from said top wall, and at least one additional opening provided in said top wall between said outer skirt and said inner skirt; c. a rigid annular check valve slidably received on said inner skirt and normally in the open position below said additional opening in said top wall, said check valve adapted to be forced upward by air pressure when said sidewalls are compressed to close said additional opening in the top wall; and d. a dip tube having its upper end portion received over the lower portion of said inner skirt and supporting said check valve when in the normally open position, and its lower end portion extending into said container.
Claim 2
Dependent Claim
187 words
In a flexible wall plastic dispensing container the combination comprising: a. a plastic container having flexible sidewalls and a generally cylindrical neck with a neck opening therein; b. a dispenser plug having a cylindrical outer skirt frictionally fitted in said neck opening, said plug having a top wall joined to said outer skirt, a cylindrical opening in said top wall, and an axially aligned integral inner cylindrical skirt surrounding said cylindrical opening and depending from said top wall, and at least one additional opening provided in said top wall between said outer skirt and said inner skirt; c. a rigid annular check valve slidably received on said inner skirt and normally in the open position below said additional opening in said top wall, said check valve adapted to be forced upward by air pressure when said sidewalls are compressed to close said additional opening in the top wall; and d. a dip tube having its upper end portion received over the lower portion of said inner skirt and supporting said check valve when in the normally open position, and its lower end portion extending into said container.
Claim 3
Dependent Claim
28 words
The dispensing container of claim 1 wherein said inner skirt is provided with a shoulder intermediate its ends, which shoulder abuts the upper end of said dip tube.
Claim 4
Dependent Claim
30 words
The dispensing container of claim 1 wherein said check valve is provided with a central opening having a diameter slightly larger than the outside diameter of said inner cylindrical skirt.
Claim 5
Dependent Claim
23 words
The dispensing container of claim 3 wherein said annular check valve is provided with an inwardly inclined wall surface adjacent said central opening.
Claim 6
Dependent Claim
21 words
The dispensing container of claim 1 wherein said neck is provided with helical threads on the outer wall of said neck.
Claim 7
Dependent Claim
28 words
The dispensing container of claim 5 including a closure cap having thread-engaging means on its inner wall engaging said helical threads on said outer wall of said neck.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |