US4035216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for bonding expanded polymeric parts
Assignee: Atlantic Richfield Co
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Filing: 1976-04-14
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Granted: 1977-07-12
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Expires: 1996-04-14
Abstract
Abstract A method for bonding expanded polymeric parts without an adhesive. The method comprises wetting the surfaces to be bonded with water or water containing from about 1% to 2% wetting agent, positioning the surfaces to be bonded in a nonmovable abutting relationship, encapsulating the joint formed by the abutting surfaces with a mold, and, while encapsulated, passing high frequency electrical energy therethrough to effectuate a bond.
Inventors
- 👤 Richard H. Immel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:29
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/48; B29C65/4895; B22; B22C; B22C7/00; B22C7/02; B22C7/023; B22C7/026; B29C44/00; B29C44/34; B29C44/56; B29C66/00; B29C66/01; B29C66/02; B29C66/024; B29C66/0242; B29C66/70; B29C66/71; B29C66/72; B29C66/727; C; C08; C08J; C08J9/00; C08J9/22; C08J9/228; C08J9/232; B29C65/02; B29C65/04; B29K; B29K2025/00; B29K2075/00; B29K2105/00; B29K2105/04; B29K2105/046; B29L; B29L2009/00; B29L2031/00; B29L2031/757; Y; Y10; Y10S; Y10S264/00; Y10S264/76; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A method for bonding molded parts of expanded polystyrene or copolymers thereof having a closed cellular structure without the use of adhesive comprising: a. wetting at least one of the surfaces to be bonded with water containing up to about 2% of a wetting agent; b. placing the surfaces to be bonded in abutting relationship free from relative movement; c. passing high frequency electrical energy through said abutted surfaces for a time sufficient to vaporize said water and to effect a bond having substantial continuity along the joint between the abutting surfaces; and d. allowing the abutted surfaces to cool for sufficient time to complete the weld.
Claim 2
Independent Claim
107 words
A method for bonding molded parts of expanded polystyrene or copolymers thereof having a closed cellular structure without the use of adhesive comprising: a. wetting at least one of the surfaces to be bonded with water containing up to about 2% of a wetting agent; b. placing the surfaces to be bonded in abutting relationship free from relative movement; c. passing high frequency electrical energy through said abutted surfaces for a time sufficient to vaporize said water and to effect a bond having substantial continuity along the joint between the abutting surfaces; and d. allowing the abutted surfaces to cool for sufficient time to complete the weld.
Claim 3
Dependent Claim
30 words
A method as set forth in claim 1 including the step of encapsulating the perimeter of the joint formed by the surfaces to be bonded to prevent post expansion foaming.
Claim 4
Dependent Claim
26 words
A method as set forth in claim 1 wherein said high frequency electrical energy is in a range of from 5 MHz to about 2,000 MHz.
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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |