US3752630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for continuous production of thermoplastic synthetic resin tube with heat-shrinking property
Assignee: Individual
•
Filing: 1972-01-05
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Granted: 1973-08-14
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Expires: 1992-01-05
Abstract
Abstract This invention provides the improved method and apparatus of producing continuously thermoplastic synthetic resin tube with a heat-shrinking property, whereby a fresh thermoplastic synthetic resin tube extruded from an extruder is expanded by fitting same over a conical-topped cylindrical member of larger diameter while in a half-solidified state and wound onto a bobbin through takeup rolls after cooled down with suitable cooling devices. This type of tube is increasingly used as a film-covering or sealing material for dry cells, bamboo rods, bottle-caps, etc. because of it shrinking to the original diameter by heating.
Inventors
- 👤 Y Yamagishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:16
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6813; B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/25; B29C48/88; B29C48/90; B29C48/901; B29C48/902; B29C48/911; B29C48/9115; B29C48/912; B29C48/919; B29C61/00; B29C61/06; B29C61/08; E04B1/6803; B29C48/001; B29C48/0018
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
Apparatus for continuous production of thermo-plastic synthetic resin tube with heat-shrinking property, comprising an extruder means for extruding the resin in the form of a tube, a mould center member linked to the end of said extruder means in alignment therewith for expanding a tube extruded, said mould center member comprising a conical-shaped portion having an apex disposed toward said extruder means, and a cylindrical portion joined to the base of said conical-shaped portion to form a juncture with said conical-shaped portion, a cooling means mounted about said cylindrical portion of said mould center member, mounting means adjustably mounting said cooling means for axial movement relative to said cylindrical portion of said mould center member, said cooling means being adjustably positioned at the juncture of said conical-shaped portion and cylindrical portion of said mould-center member for setting the expanded tube thereat to afford only diametrical heat-shrink properties, or below said juncture for setting the expanded tube intermediately of said mould-center member to afford both diametrical and axial heat-shrink properties to said tube, and take-up rolls provided underneath said cooling means.
Claim 2
Dependent Claim
180 words
Apparatus for continuous production of thermo-plastic synthetic resin tube with heat-shrinking property, comprising an extruder means for extruding the resin in the form of a tube, a mould center member linked to the end of said extruder means in alignment therewith for expanding a tube extruded, said mould center member comprising a conical-shaped portion having an apex disposed toward said extruder means, and a cylindrical portion joined to the base of said conical-shaped portion to form a juncture with said conical-shaped portion, a cooling means mounted about said cylindrical portion of said mould center member, mounting means adjustably mounting said cooling means for axial movement relative to said cylindrical portion of said mould center member, said cooling means being adjustably positioned at the juncture of said conical-shaped portion and cylindrical portion of said mould-center member for setting the expanded tube thereat to afford only diametrical heat-shrink properties, or below said juncture for setting the expanded tube intermediately of said mould-center member to afford both diametrical and axial heat-shrink properties to said tube, and take-up rolls provided underneath said cooling means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |