US3854527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for fabricating corrugated plastic tubing
Assignee: Individual
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Filing: 1972-09-01
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Granted: 1974-12-17
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Expires: 1992-09-01
Abstract
Abstract An apparatus and method for manufacturing corrugated plastic tubing and which comprises an extruder having an extrusion die for extruding a smooth tube of hot plastic material, blow molding means positioned adjacent the extruder for forming annular corrugations in the tube, and tube cooling means positioned adjacent the blow molding means for cooling the tube. The tube cooling means includes a housing defining a first zone wherein a plurality of streams of liquid coolant are directed against the tube advancing therethrough, and a second zone wherein the adhering residual liquid coolant is wiped from all surfaces of the corrugated tube by a high velocity current of air. The blow molding means and the tube cooling means are slidably supported and fixedly connected to each other so that they may be withdrawn from the extruder to permit servicing of the extrusion die. Also, the blow molding means includes a plug carried by a mandrel attached to the extruder by a quick disconnect coupling such that the plug may be disconnected and advanced through the cooling chamber to cool the same prior to cleaning and servicing thereof.
Inventors
- 👤 E Maroschak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:47
CPC Classifications
B; B29; B29C; B29C71/00; B29C35/00; B29C35/16; B29C37/00; B29C37/0089; B29C48/00; B29C48/03; B29C48/09; B29C48/13; B29C48/25; B29C48/88; B29C48/911; B29C48/9115; B29C2035/1616; B29C2035/1658; B29C48/001; B29C48/0018; B29C48/12; B29L; B29L2023/00; B29L2023/003; B29L2023/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
150 words
An apparatus adaptable for cooling a horizontally advancing hot annularly corrugated plastic tube following the molding thereof and wherein the tube is delivered in a dry condition to facilitate subsequent processing thereof, said apparatus comprising a housing including three horizontally spaced vertical walls defining a first zone between the first and second walls and a sEcond zone between the second and third walls, each of said walls having an opening for passage of the tube therethrough in a horizontal direction, means located in said first zone for directing a plurality of streams of liquid coolant against the corrugated exterior surface of the advancing tube disposed in said first zone, and means in said second zone for directing a high velocity current of gas against the corrugated exterior surface of the advancing tube disposed in the second zone to remove the adhering residual liquid coolant therefrom and further cool the same.
Claim 2
Independent Claim
150 words
An apparatus adaptable for cooling a horizontally advancing hot annularly corrugated plastic tube following the molding thereof and wherein the tube is delivered in a dry condition to facilitate subsequent processing thereof, said apparatus comprising a housing including three horizontally spaced vertical walls defining a first zone between the first and second walls and a sEcond zone between the second and third walls, each of said walls having an opening for passage of the tube therethrough in a horizontal direction, means located in said first zone for directing a plurality of streams of liquid coolant against the corrugated exterior surface of the advancing tube disposed in said first zone, and means in said second zone for directing a high velocity current of gas against the corrugated exterior surface of the advancing tube disposed in the second zone to remove the adhering residual liquid coolant therefrom and further cool the same.
Claim 3
Dependent Claim
50 words
The apparatus as defined in claim 1 wherein said means for directing a plurality of streams of liquid coolant against the tube includes a plurality of rows of spray nozzles extending horizontally through said first zone, said rows being circularly arranged about the path of travel of the tube therethrough.
Claim 4
Dependent Claim
55 words
The apparatus as defined in claim 2 wherein there are three of said rows of spray nozzles extending through said first zone, said three rows of nozzles being equally spaced about the path of travel of the tube therethrough with one of said rows being positioned to impinge upon the bottom of the advancing tube.
Claim 5
Dependent Claim
41 words
The apparatus as defined in claim 3, wherein said means for directing a high velocity current of gas against the tube comprises a plurality of jet nozzles circularly arranged about the path of travel of the tube through said second zone.
Claim 6
Dependent Claim
53 words
The apparatus as defined in claim 4, wherein each of said wall openings include sealing means for wipingly engaging the tube passing therethrough and for preventing substantial amounts of the liquid coolant from passing therethrough, said sealing means comprising a circular series of radially directed flexible flap members carried by the associated wall.
Claim 7
Dependent Claim
44 words
The apparatus as defined in claim 5, wherein said housing further includes horizontally extending bottom and side walls interconnecting said vertical walls to define a trough having an open top, and a cover means hingedly connected to said trough for overlying said open top.
Claim 8
Dependent Claim
29 words
The apparatus as defined in claim 6, wherein said cover means comprises a first cover overlying said first zone and a second independently operable cover overlying said second zone.
Claim 9
Dependent Claim
28 words
The apparatus as defined in claim 6, wherein at least a substantial portion of said cover means is foraminous to facilitate the escape of gas from the trough.
Claim 10
Dependent Claim
26 words
The apparatus as defined in claim 6 further including drain means operatively connected to said bottom wall of said housing for removing the liquid coolant therefrom.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |