US3594862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal heating of rotating parison
Assignee: Phillips Petroleum Co
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Filing: 1968-12-13
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Granted: 1971-07-27
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Expires: 1988-12-13
Abstract
Abstract A rotating parison is heated with an internal radiant heating means, said parison being disposed within a sleeve during the heating step to allow supplemental heat to be added from the outside of the parison. A shield, tapering toward the ends, can be provided around the heating means to provide even heating, or if controlled variation in heating along the axis is desired, the heating means can comprise a member having variable turns of resistance wire along its axis or variable axially disposed loops.
Inventors
- 👤 Charles L Seefluth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:59
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/64; B29C49/6409; B29C49/6418; B29B; B29B13/00; B29B13/02; B29B13/023; B29B13/024; B29C35/00; B29C35/02; B29C35/08; B29C49/6436; B29C49/6445; B29C35/0805; B29C2035/0822; B29C2949/00; B29C2949/07; B29C2949/079; B29C2949/08; B29K; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/258; B29L; B29L2023/00; Y; Y10; Y10S; Y10S425/00; Y10S425/013; Y10S425/039
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
Apparatus for heating a tubular parison comprising in combination: an elongated radiant heating means disposed in a substantially horizontal plane within a sleeve, said sleeve being of suCh size that an annular space is present between the inner surface of said sleeve and the outer surface of said tubular parison; a first rotatable member having a first parison holding means thereon, said first rotatable member being axially moveable toward and away from a first end of said elongated heating means; a second rotatable member concentric with said first rotatable member and said heating means and having a second parison holding means thereon; and means to support said elongated radiant heating means within a tubular parison held by said first and second rotating means.
Claim 2
Dependent Claim
123 words
Apparatus for heating a tubular parison comprising in combination: an elongated radiant heating means disposed in a substantially horizontal plane within a sleeve, said sleeve being of suCh size that an annular space is present between the inner surface of said sleeve and the outer surface of said tubular parison; a first rotatable member having a first parison holding means thereon, said first rotatable member being axially moveable toward and away from a first end of said elongated heating means; a second rotatable member concentric with said first rotatable member and said heating means and having a second parison holding means thereon; and means to support said elongated radiant heating means within a tubular parison held by said first and second rotating means.
Claim 3
Dependent Claim
35 words
Apparatus according to claim 1 wherein a shield is disposed around said elongated radiant heating means, said shield covering a greater area of said elongated radiant heating means in the center than at the ends.
Claim 4
Dependent Claim
34 words
An apparatus according to claim 1 wherein said elongated radiant heating means comprises a resistance heating element having a plurality of taps and means to individually adjust current flowing between each of said taps.
References Cited (Backward Citations)
FR529152A
Cited
US2354100A
Cited
US2792593A
Cited
US3052789A
Cited
US3072959A
Cited
US3283046A
Cited
US3319351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |