US4333608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molding nozzle
Assignee: Ex-Cell-O Corp
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Filing: 1980-09-19
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Granted: 1982-06-08
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Expires: 2000-09-19
Abstract
Abstract This invention is an improved injection molding nozzle whereby the shut-off plunger is operated by a fluid and the opening of the nozzle is accomplished by the flow of plasticized material through the nozzle. A control rod internal to the nozzle controls the movement of the plunger shut-off member and is adjustable so that the amount of plasticized resin flowing through the nozzle can be accurately controlled.
Inventors
- 👤 James W. Hendry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:51
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/28; B29C45/2806; B29C2045/2772; Y; Y10; Y10S; Y10S425/00; Y10S425/227; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7835
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
168 words
An apparatus for controlling the flow of plasticized resin through a nozzle assembly comprising: (a) a nozzle tip means attached to a nozzle body means, said body means affixed to a manifold means; (b) passage means internal to said manifold means communication with a bore in said nozzle body means and in communication with bore in said nozzle tip means; (c) plunger means internal to said nozzle assembly in cooperating engagement with said nozzle tip means; (d) a control rod means, having a longitudinal bore therein, coacting with said plunger means and forming a chamber therein; (e) said control rod means adjustably attached to said manifold means for controlling the displacement of said plunger means to vary the flow of plasticized resin; (f) said plunger means is operated to an open position by a force developed by the resin acting on a differential area of said plunger and; (g) said plunger is operated to a closed position by a force developed by fluid pressure in said chamber means.
Claim 2
Independent Claim
168 words
An apparatus for controlling the flow of plasticized resin through a nozzle assembly comprising: (a) a nozzle tip means attached to a nozzle body means, said body means affixed to a manifold means; (b) passage means internal to said manifold means communication with a bore in said nozzle body means and in communication with bore in said nozzle tip means; (c) plunger means internal to said nozzle assembly in cooperating engagement with said nozzle tip means; (d) a control rod means, having a longitudinal bore therein, coacting with said plunger means and forming a chamber therein; (e) said control rod means adjustably attached to said manifold means for controlling the displacement of said plunger means to vary the flow of plasticized resin; (f) said plunger means is operated to an open position by a force developed by the resin acting on a differential area of said plunger and; (g) said plunger is operated to a closed position by a force developed by fluid pressure in said chamber means.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1 wherein the area ratio between the nozzle tip end of the plunger and the control rod engaging end is greater than one.
Claim 4
Dependent Claim
27 words
The apparatus of claim 2 wherein said adjusting means comprises a threaded member affixedly held to said manifold engaging a thread portion on said control rod means;
Claim 5
Dependent Claim
25 words
The apparatus of claim 3 wherein the minimum engagement of said control rod into said plunger means is twice the diameter of said control rod.
Claim 6
Dependent Claim
20 words
The apparatus of claim 1, 3, or 4, wherein the fluid source for operating said plunger means is dry nitrogen.
Claim 7
Dependent Claim
20 words
The apparatus of claim 1, 3, or 4, wherein the fluid source for operating said plunger means is compressed air.
Claim 8
Dependent Claim
20 words
The apparatus of claim 1 wherein said fluid pressure is maintained continuously in said chamber during operation of the nozzle.
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) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |