Patent US4444818A successfully refreshed from Google Patents.
US4444818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforcing adhesive sheets
Assignee: Nitto Denko Corp
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Filing: 1983-01-31
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Granted: 1984-04-24
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Expires: 2003-01-31
Abstract
Abstract A thermosetting adhesive sheet is described, comprising a thermosetting resin sheet-shaped prepreg with a reinforcing material embedded therein, and a flattened tubular material provided on one side of the prepeg, said flattened tubular material being capable of nearly recovering the original tubular form on heating and being narrower in width than the prepreg. The prepreg may be of the two-layer structure comprising a first thermosetting resin composition layer and a second thermosetting resin composition layer.
Inventors
- 👤 Takashi Tominaga
- 👤 Toshihiko Ariyoshi
- 👤 Eishi Asoshina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:13
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B29C35/0272; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29C61/00; B29C61/06; B29D; B29D99/00; B29D99/001; B29D99/0014; B29D99/0017; B32B1/00; B32B1/08; B32B27/36; B32B27/38; B60; B60J; B60J5/00; B60J5/04; B60J5/042; B60J5/0452; B60J5/0454; B62; B62D; B62D25/00; B62D25/02; B62D27/00; B62D27/02; B62D27/026; B32B2305/00; B32B2305/07; B32B2305/076; B32B2305/08; B32B2305/72; B32B2315/00; B32B2315/08; B32B2315/085; B32B2405/00; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/1348; Y10T428/1352; Y10T428/1362; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
51 words
A reinforcing adhesive sheet comprising a thermosetting resin sheet-shaped prepreg with a reinforcing material embedded therein, and a flattened tubular material provided on one side of the prepreg, said flattened tubular material being capable of nearly recovering the original tubular form on heating and being narrower in width than the prepreg.
Claim 2
Dependent Claim
51 words
A reinforcing adhesive sheet comprising a thermosetting resin sheet-shaped prepreg with a reinforcing material embedded therein, and a flattened tubular material provided on one side of the prepreg, said flattened tubular material being capable of nearly recovering the original tubular form on heating and being narrower in width than the prepreg.
Claim 3
Dependent Claim
23 words
The reinforcing adhesive sheet as claimed in claim 1, wherein the flattened tubular material is prepared using a cross-linked thermoplastic resin tubular material.
Claim 4
Dependent Claim
21 words
The reinforcing adhesive sheet as claimed in claim 2, wherein the thermoplastic resin tubular material is a polyethylene resin tubular material.
Claim 5
Dependent Claim
34 words
The reinforcing adhesive sheet as claimed in claim 1, wherein the flattened tubular material is prepared using a tubular material of the two-layer structure, the inner layer being a hot melt type resin layer.
Claim 6
Dependent Claim
76 words
The reinforcing adhesive sheet as claimed in claim 1, wherein the prepreg comprises a first thermosetting resin composition layer with a reinforcing material embedded therein, said composition being formulated so that when heat-cured, it produces a sufficient tensile modulus, and a second thermosetting resin composition layer, said composition being formulated so that, when heat-cured, produces an insufficient tensile modulus, and the flattened tubular material is provided at the side of the second thermosetting resin composition layer.
Claim 7
Dependent Claim
66 words
The reinforcing adhesive sheet as claimed in claim 5, wherein the first thermosetting resin composition layer is an epoxy resin composition layer which, when heat-cured, has a tensile modulus of from 30 to 500 kg/mm 2 , and the second thermosetting resin composition layer is an epoxy resin composition layer which, when heat cured, has a tensile modulus of from 0.1 to 22 kg/mm 2 .
Claim 8
Dependent Claim
18 words
The reinforcing adhesive sheet as claimed in claim 1, wherein the reinforcing material is a glass fiber cloth.
Claim 9
Dependent Claim
31 words
The reinforcing adhesive sheet as claimed in claim 1, wherein the prepreg is covered with a protective film at the opposite side thereof in relation to the flattened tubular material-provided side.
Claim 10
Dependent Claim
17 words
The reinforcing adhesive sheet as claimed in claim 8, wherein the protective film is a polyester film.
Claim 11
Dependent Claim
49 words
The reinforcing adhesive sheet as claimed in claim 5, wherein the first thermosetting resin composition layer has a thickness within the range of from 0.01 to about 10 mm and the second thermosetting resin composition layer has a thickness within the range of from 0.1 to about 30 mm.
Claim 12
Dependent Claim
43 words
The reinforcing adhesive sheet as claimed in claim 10, wherein the first layer has a thickness within the range of from 0.1 to about 5 mm and the second layer has a thickness within the range of from 0.5 to about 10 mm.
Claim 13
Dependent Claim
28 words
The reinforcing adhesive sheet as claimed in claim 5, wherein the total thickness of the prepreg is within the range of from about 0.2 to about 40 mm.
Claim 14
Dependent Claim
28 words
The reinforcing adhesive sheet as claimed in claim 12, wherein the total thickness of the prepreg is within the range of from about 0.5 to about 20 mm.
Claim 15
Dependent Claim
33 words
The reinforcing adhesive sheet as claimed in claim 2, wherein the flattened tubular material is prepared using a tubular material of the two-layer structure, the inter layer being a hot-melt type resin layer.
Claim 16
Dependent Claim
60 words
The reinforcing adhesive sheet as claimed in claim 2, wherein the prepreg comprises a first thermosetting resin composition layer with a reinforcing material embedded therein, said composition being formulated so that, when heat cured, it produces an increased tensile modulus, and a second thermosetting resin composition layer, said compositing being formulated so that, when heat-cured, produces a decreased tensile modulus.
Claim 17
Dependent Claim
18 words
The reinforcing adhesive sheet as claimed in claim 5, wherein the reinforcing material is a glass fiber cloth.
Claim 18
Dependent Claim
31 words
The reinforcing adhesive sheet as claimed in claim 5, wherein the prepreg is covered with a protective film at the opposite side thereof in relation to the flattened tubular material-provided side.
Claim 19
Dependent Claim
34 words
The reinforcing adhesive sheet as claimed in claim 14, wherein the hot-melt type resin layer melt at a temperature lower than the temperature at which the flattened tubular material recovers the original tubular form.
References Cited (Backward Citations)
US4378395A
Cited
US4399174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |