US3893465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guide device for plastic tube extrusion
Assignee: JESS AND LOWELL WELL CASING CO
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Filing: 1974-04-22
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Granted: 1975-07-08
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Expires: 1994-04-22
Abstract
Abstract Apparatus for use in combination with plastic tube extrusion machinery of the type which heat extrudes continuous tubing for axial passage through a coolant filled elongated chamber, the apparatus consisting of one or more resilient, arcuate bearing members disposed along the elongated chamber in contact with the extruded tubing during the cooling phase and until required rigidity is achieved. The bearing members consist of one or more resilient pads adjustably clamped along a channel member which is rigidly secured axially along the elongated chamber and which includes a coolant water source led directly along the under side of the channel member and extending over each of the resilient pads.
Inventors
- 👤 Lowell K Cheatwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:27
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/919; B29C48/03; B29C48/09; B29C48/911; B29C48/9115; B29C48/90; B29C48/905
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
143 words
Apparatus for use in combination with a tubing extrusion device of the type which heat extrudes continuous tubing for axial passage through a coolant filled elongated chamber, comprising: an elongated guide member formed as a downward opening transversely concave member and having first and second sides, said guide member being secured within said chamber to extend longitudinally axially and above the path of said tubing axial passage; at least one resilient meanS adjustably secured to opposite ones of said first and second sides, said resilient means being adjusted to form a transverse, upwardly concave and generally parabolic shape wherein the uppermost arcuate portion of said resilient means is disposed in contact with said extruded tubing passing therebeneath; and means for adjusting the lateral and vertical positioning of said resilient means in relation to the axial passageway of said tubing through said elongated chamber.
Claim 2
Dependent Claim
143 words
Apparatus for use in combination with a tubing extrusion device of the type which heat extrudes continuous tubing for axial passage through a coolant filled elongated chamber, comprising: an elongated guide member formed as a downward opening transversely concave member and having first and second sides, said guide member being secured within said chamber to extend longitudinally axially and above the path of said tubing axial passage; at least one resilient meanS adjustably secured to opposite ones of said first and second sides, said resilient means being adjusted to form a transverse, upwardly concave and generally parabolic shape wherein the uppermost arcuate portion of said resilient means is disposed in contact with said extruded tubing passing therebeneath; and means for adjusting the lateral and vertical positioning of said resilient means in relation to the axial passageway of said tubing through said elongated chamber.
Claim 3
Dependent Claim
49 words
Apparatus as set forth in claim 1 wherein said at least one resilient means comprises: resilient strap means of approximately 6 inches width secured on said first side and adjustably secured on said second side of said elongated member to impose selected parabolic cross-section consonant with said tubing diameter.
Claim 4
Dependent Claim
28 words
Apparatus as set forth in claim 2 which is further characterized in that: said resilient strap means is sheet rubber of one-half inch thickness and 50 durometer hardness.
Claim 5
Dependent Claim
26 words
Apparatus as set forth in claim 1 which is further characterized to include: four of said resilient means disposed generally equi-spaced along said elongated guide member.
Claim 6
Dependent Claim
60 words
Apparatus as set forth in claim 1 which further includes: a coolant water source and water drain for maintaining water within said elongated chamber at a predetermined level; and tubing connected to said water source, said tubing having a plurality of release holes which are led beneath the uppermost portion of said elongated guide member and along the length thereof.
Claim 7
Dependent Claim
26 words
Apparatus as set forth in claim 5 wherein the internal angle of concavity of said elongated guide member is in the range of 90* to 110*.
Claim 8
Dependent Claim
26 words
Apparatus as set forth in claim 1 wherein the internal angle of concavity of said elongated guide member is in the range of 90* to 110*.
Claim 9
Dependent Claim
20 words
Apparatus as set forth in claim 1 wherein said elongated guide member is foraminous to allow free liquid flow therethrough.
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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |