US3656992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating cellular core structures
Assignee: BASF Schweiz AG
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Filing: 1970-02-17
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Granted: 1972-04-18
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Expires: 1990-02-17
Abstract
Abstract A method of providing cellular core structures with fillets of adhesive, to core structures so provided with fillets, and to assemblies of such core structures and facing panels. The core structures are used in the aircraft and other industries as bonds to high strength facing panels.
Inventors
- 👤 Peter Henry Lynam
- 👤 Keith Noakes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:23
CPC Classifications
B; B32; B32B; B32B37/00; B32B37/14; B32B37/146; B29; B29D; B29D24/00; B29D24/002; B29D24/005; B32B3/00; B32B3/10; B32B3/12; C; C09; C09J; C09J5/00; C09J5/06; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1003; Y10T156/1052; Y10T156/1056
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
27 words
Method according to claim 1, in which the film adhesive is perforated, or provided with zones of weakness, and then draped in position over the honeycomb core.
Claim 2
Dependent Claim
31 words
Method according to claim 1, in which the film adhesive is draped in position over the honeycomb core, and holes or zones of weakness are then provided at the required locations.
Claim 3
Dependent Claim
39 words
Method according to any of claim 1, wherein the holes or zones of weakness are positioned substantially centrally within each area bounded by those parts of the film in immediate contact with the edge sections of the said cells.
Claim 4
Dependent Claim
19 words
Method according to any of claim 1, wherein the honeycomb core cells contacting the film adhesive are substantially uniform.
Claim 5
Dependent Claim
19 words
Method according to any of claim 1, wherein the honeycomb core cells contacting the film adhesive are substantially regular.
Claim 6
Dependent Claim
14 words
Method according to claim 6, in which the said honeycomb core cells are hexagonal.
Claim 7
Dependent Claim
24 words
Method according to any of claim 1, wherein the average maximum width of the cells contacting the film adhesive does not exceed 2 cm.
Claim 8
Dependent Claim
37 words
Method according to any of claim 1, wherein the proportion of the area of the hole or zone of weakness in each area of film adhesive bounded by the edge sections is 1 percent to 25 percent.
Claim 9
Dependent Claim
17 words
Method according to claim 9, in which the said proportion is from 5 percent to 15 percent.
Claim 10
Dependent Claim
15 words
Method according to any of claim 1, wherein the film adhesive comprises a thermoplastics material.
Claim 11
Dependent Claim
32 words
Method according to any of claim 1, wherein the film adhesive essentially consists of a thermosetting plastics material, the fillets of adhesive being formed under conditions such that the adhesive remains thermosetting.
Claim 12
Dependent Claim
14 words
Method according to claim 12 wherein the thermosetting plastics material comprises an epoxide resin.
Claim 13
Dependent Claim
15 words
Method according to claim 12, in which the film adhesive also contains a thermoplastic polymer.
Claim 14
Dependent Claim
25 words
Method according to claim 14, in which the film adhesive contains an epoxide resin and, as the thermoplastic polymer, a phenoxy resin or a polysulphone.
Claim 15
Dependent Claim
21 words
Method according to claim 14, in which the film adhesive contains an epoxide resin, and, as the thermoplastic polymer, a nylon.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |