US3706620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming the end of a plastic tube and sealing the tube within a flexible container
Assignee: Ethylox Products Inc
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Filing: 1970-03-13
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Granted: 1972-12-19
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Expires: 1990-03-13
Abstract
Abstract Apparatus for joining the end of a hollow, elongated plastic member to a plastic sheet member and jointly molding the same including a molding member of dielectric material, preferably Teflon, having a rounded cavity in a surface thereof. A first, mandrel-shaped electrode is supported in the molding member and extends into the cavity. A second, outer electrode encircles the molding member and cavity. The plastic members are positioned so that the end to be formed is in the cavity, in contact with the wall thereof, and a high frequency electric current, in the range of about 25-27 megacycles, is passed through the molding member and plastic members whereupon the members are jointly formed into a rounded tip.
Inventors
- 👤 Edward G Dykstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:49
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/04; B29C57/00; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/13; B29C66/137; B29C66/50; B29C66/51; B29C66/53; B29C66/532; B29C66/5326; B29C66/53261; B29C66/53262; B29C66/80; B29C66/81; B29C66/812; B29C66/8126; B29C66/81262; B29C66/81263; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81421; B29C66/81422; B29C66/81427; B29C66/81429; B29C66/81431; B29C66/83; B29C66/832; B29C66/8322; B29C35/00; B29C35/02; B29C35/12; B29C66/004; B29C66/0042; B29C66/20; B29C66/24; B29C66/242; B29C66/2422; B29C66/24221; B29C66/70; B29C66/71; B29C66/8122; B29C66/81423; B29L; B29L2031/00; B29L2031/712; B29L2031/7148; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
138 words
A method of sealing a relatively short member of plastic tubing in a plastic bag of thin sheet material provided with an opening therein, comprising the steps of: a. inserting the tubing into the bag opening so that one end of the tubing is within the bag and the other end of the tubing is contiguous with the edge of the bag opening; b. placing a mandrel-shaped electrode into the tubing and a dielectric member Having a cup-shaped cavity in contact with the portion of the bag covering the end of the tubing; c. passing a high frequency electric current through the dielectric member between the mandrel-shaped electrode and an electrode encircling the dielectric member; and d. fusing and simultaneously shaping the end of the tubing and edge of the bag opening together in a unitary, rounded tip.
Claim 2
Independent Claim
138 words
A method of sealing a relatively short member of plastic tubing in a plastic bag of thin sheet material provided with an opening therein, comprising the steps of: a. inserting the tubing into the bag opening so that one end of the tubing is within the bag and the other end of the tubing is contiguous with the edge of the bag opening; b. placing a mandrel-shaped electrode into the tubing and a dielectric member Having a cup-shaped cavity in contact with the portion of the bag covering the end of the tubing; c. passing a high frequency electric current through the dielectric member between the mandrel-shaped electrode and an electrode encircling the dielectric member; and d. fusing and simultaneously shaping the end of the tubing and edge of the bag opening together in a unitary, rounded tip.
Claim 3
Dependent Claim
28 words
A method according to claim 1 wherein the outer ends of the bag and tubing are placed in a cavity in a dielectric material consisting essentially of Teflon.
Claim 4
Dependent Claim
22 words
A method according to claim 1 wherein said step of passing electric current is done at a frequency of about 25-27 megacycles.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |