Patent US2179612A successfully refreshed from Google Patents.
US3841567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion nozzle
Assignee: Mardson Corp
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Filing: 1973-07-23
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Granted: 1974-10-15
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Expires: 1993-07-23
Abstract
Abstract An extrusion nozzle having a minimum volume cavity at one end of the outlet orifice supply passage and a minimal lip area defined by an externally tapered nozzle extremity adjacent the orifice. The combination of the minimum volume cavity and the minimal lip area of the nozzle reduces the phenomenon of extruded compound material dripping from or building up on the outlet end of the nozzle.
Inventors
- 👤 B Vilagi
- 👤 J Drozek
- 👤 R Horvath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:51
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/301; B29C48/03; B29C48/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
176 words
An extrusion nozzle assembly for extruding viscous liquid material at a pressure of at least 2,000 pounds per square inch, said nozzle assembly being adapted To be removably secured to the end of a fluid dispenser, said nozzle assembly including a valve element and a valve seat, said valve element being disposed in said dispenser and operatively cooperable with said valve seat to control the flow of material through said nozzle assembly, a nozzle tip mounted below said valve seat and having a through passage, said passage being in fluid communication at one end with said valve seat, said nozzle passage terminating at the end opposite said one end in an outlet orifice, a minimum volume cavity adjacent to said valve element and said valve seat of no greater than approximately 0.47 X 10 4 in3, and said opposite end of said passage being surrounded by an externally tapered surface of said nozzle tip which cooperates with said orifice to form a minimal end lip area of no greater than approximately 27.7 X 10 5 in2.
Claim 2
Dependent Claim
176 words
An extrusion nozzle assembly for extruding viscous liquid material at a pressure of at least 2,000 pounds per square inch, said nozzle assembly being adapted To be removably secured to the end of a fluid dispenser, said nozzle assembly including a valve element and a valve seat, said valve element being disposed in said dispenser and operatively cooperable with said valve seat to control the flow of material through said nozzle assembly, a nozzle tip mounted below said valve seat and having a through passage, said passage being in fluid communication at one end with said valve seat, said nozzle passage terminating at the end opposite said one end in an outlet orifice, a minimum volume cavity adjacent to said valve element and said valve seat of no greater than approximately 0.47 X 10 4 in3, and said opposite end of said passage being surrounded by an externally tapered surface of said nozzle tip which cooperates with said orifice to form a minimal end lip area of no greater than approximately 27.7 X 10 5 in2.
Claim 3
Dependent Claim
38 words
The nozzle assembly of claim 1 wherein said nozzle assembly includes, a nozzle holder, said nozzle tip being fixedly secured in said holder by swaging a thin walled section of said holder into engagement with said nozzle tip.
Claim 4
Dependent Claim
16 words
The nozzle assembly of claim 2 wherein said nozzle tip is made of a non-metallic material.
Claim 5
Dependent Claim
15 words
The nozzle assembly of claim 3 wherein said nozzle tip is made of ceramic material.
Claim 6
Dependent Claim
24 words
The nozzle of claim 1 wherein said nozzle assembly comprises a nozzle tip in the form of a capillary tube mounted in a holder.
Claim 7
Dependent Claim
24 words
The nozzle of claim 5 wherein said capillary tube is fixedly secured in said holder and is in abutting engagement with said valve seat.
Claim 8
Dependent Claim
22 words
The nozzle of claim 6 wherein said capillary tube is fixedly secured in said holder by brazing said tube to said holder.
Claim 9
Dependent Claim
29 words
The nozzle of claim 6 wherein said capillary tube is secured in said holder by swaging a thin walled section of said holder into engagement with said capillary tube.
Claim 10
Dependent Claim
21 words
The nozzle assembly of claim 1 wherein said valve seat is made of carbide and is secured to said nozzle tip.
Claim 11
Dependent Claim
27 words
The nozzle assembly of claim 9 wherein said valve seat is secured to a hub on the upper end of said nozzle tip by means of brazing.
Claim 12
Dependent Claim
48 words
The nozzle assembly of claim 1 wherein said nozzle is mounted below said valve seat by means of a threaded nut, said nozzle is made of ceramic material and, retained in one end of said nut by swaging a thin walled section of said nut around said nozzle.
Claim 13
Dependent Claim
19 words
The nozzle assembly of claim 1 wherein said nozzle is made of a ceramic composite of high thermal conductivity.
Claim 14
Dependent Claim
16 words
The nozzle assembly of claim 1 wherein said nozzle is made of an alumina ceramic material
Claim 15
Dependent Claim
16 words
The nozzle assembly of claim 12 wherein said nozzle is made of a beryllia ceramic material.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |