Patent US1826188A successfully refreshed from Google Patents.
Patent US3821051A successfully refreshed from Google Patents.
US3821051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for bonding rib structures of thermoplastic resin
Assignee: EIDP Inc
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Filing: 1970-12-16
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Granted: 1974-06-28
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Expires: 1990-12-16
Abstract
Abstract Ribbed structure laminate is provided comprising a film of thermoplastic resin heat-bonded to the tops of a plurality of ribs which are in turn integrally molded at their base with another film of thermoplastic resin, with the junction between the first-mentioned film and the tops of the ribs being in the form of a smooth transition between the film and a flange formed along the top of each rib. The laminate is useful as a material of construction such as for packaging, heat exchangers and insulation. The laminate can be made by maintaining the ribs in contact with a heated release surface so as to form a molten flange along the top of each rib, progressively removing the molten flanges from the release surface, and progressively contacting the molten flanges with a film of heated thermoplastic resin. This process is also applicable to the bonding of other thermoplastic resin objects, surface-to-edge or edge-to-edge, together.
Inventors
- 👤 M Withers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:38
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/26; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29C43/30; B29C43/305; B29C65/00; B29C65/02; B29C65/18; B29C65/20; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/114; B29C66/1142; B29C66/40; B29C66/41; B29C66/43; B29C66/438; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5346; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/82; B29C66/826; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29C66/836; B29C67/00; B29C67/0044; B29D; B29D24/00; B29D24/002; B29D24/004; B32B1/00; B32B1/08; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; B29C43/02; B29C43/04; B29C2043/043; B29C43/32; B29C43/34; B29C2043/3433; B29C43/36; B29C2043/3676; B29C2043/3678; B29C43/44; B29C43/46; B29C66/432; B29C66/4322; B29C66/434; B29C66/4344; B29C66/43441; B29C66/71; B29C66/72; B29C66/725; B29C66/7252; B29C66/72523; B29C66/731; B29C66/7313; B29C66/735; B29C66/7352; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/0608; B29K2023/0633; B29K2995/00; B29K2995/0037; B29K2995/0072; B29K2995/0073; B29L; B29L2024/00; B32B2439/00; B32B2597/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1013; Y10T156/1036; Y10T156/1038; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24479; Y10T428/2457; Y10T428/24744
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A process for heat bonding an edge of a first thermoplastic resin object to an edge or surface of a second thermoplastic resin object, comprising advancing said first object along a path with its edge in contact with a heated release surface moving therewith to melt its edge, said first object being under compression against said release surface whereby said molten edge forms into a flange thereagainst, progressively removing the said first object and thereby the molten edge in the form of a flange from said release surface, and progressively contacting said flanged molten edge with said edge or surface of said second object in sufficiently heated condition to cause heat-bonding at the location of said contact, to form a junction between the edge of the first object and the edge of the second object having a radius on each side of the junction equal to at least the thickness of the edge of the first object.
Claim 2
Dependent Claim
157 words
A process for heat bonding an edge of a first thermoplastic resin object to an edge or surface of a second thermoplastic resin object, comprising advancing said first object along a path with its edge in contact with a heated release surface moving therewith to melt its edge, said first object being under compression against said release surface whereby said molten edge forms into a flange thereagainst, progressively removing the said first object and thereby the molten edge in the form of a flange from said release surface, and progressively contacting said flanged molten edge with said edge or surface of said second object in sufficiently heated condition to cause heat-bonding at the location of said contact, to form a junction between the edge of the first object and the edge of the second object having a radius on each side of the junction equal to at least the thickness of the edge of the first object.
Claim 3
Dependent Claim
47 words
The process of claim 1 wherein said first object is a ribbed structure comprising a film and a plurality of ribs integrally molded therewith extending from a surface of said film and the tops of said ribs form the edge melting in contact with said release surface.
Claim 4
Dependent Claim
34 words
The process of claim 2 wherein said path and release surface is curved and the compression of said ribbed structure is obtained by maintaining said ribbed structure under tension while advanced along said path.
Claim 5
Dependent Claim
30 words
The process of claim 2 wherein said second object is in the form of a film and it is a surface thereof that contacts the molten tops of said ribs.
Claim 6
Dependent Claim
62 words
The process of claim 1 wherein said first and second objects are one, in the form of a sheet, and the opposing edges of said sheet in the direction of advancement thereof are each in contact with a heated release surface, and the contacting step consists of bringing the resultant molten edges of said sheet together to form a tubular shape therefrom.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |