US4769276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mica-coated electrically insulating and fire-proofing adhesive tape especially suitable for electrical or optical fiber cable
Assignee: Alstom SA
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Filing: 1986-12-15
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Granted: 1988-09-06
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Expires: 2006-12-15
Abstract
Abstract The mica-coated adhesive tape comprises at least one sheet of mica paper and at least one backing sheet bonded to the mica paper sheet by means of a binder, the face of the mica paper sheet away from the backing sheet being coated with an adhesive. The adhesive includes an outer coating of a silicone resin.
Inventors
- 👤 William Gruss
- 👤 Rene Boulaigre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:12
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/56; H01B17/60; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251; Y10T428/28; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31786; Y10T442/00; Y10T442/30; Y10T442/3927; Y10T442/3935; Y10T442/50; Y10T442/56
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
133 words
An electrically insulating and fire-proof adhesive tape especially for use with electrical cable and optical fiber cable, the tape comprising: a first layer having an inner side and an outer side, the first layer including at least one sheet of mica paper; a backing layer disposed on the outer side of the first layer, the backing layer including at least one reinforcing sheet; a binder bonding the backing layer to the outer side of the first layer, the binder comprising a polysiloxane resin containing a hardening catalyst additive; and an adhesive layer bonded to the inner side of the first layer, the adhesive layer comprising an exposed pressure-sensitive adhesive coating of a hardenable silicone resin without a hardening additive, such that the coating is capable of retaining pressure-sensitive adhesivity over a long time.
Claim 2
Dependent Claim
133 words
An electrically insulating and fire-proof adhesive tape especially for use with electrical cable and optical fiber cable, the tape comprising: a first layer having an inner side and an outer side, the first layer including at least one sheet of mica paper; a backing layer disposed on the outer side of the first layer, the backing layer including at least one reinforcing sheet; a binder bonding the backing layer to the outer side of the first layer, the binder comprising a polysiloxane resin containing a hardening catalyst additive; and an adhesive layer bonded to the inner side of the first layer, the adhesive layer comprising an exposed pressure-sensitive adhesive coating of a hardenable silicone resin without a hardening additive, such that the coating is capable of retaining pressure-sensitive adhesivity over a long time.
Claim 3
Dependent Claim
15 words
An adhesive tape according to claim 1 wherein said silicone resin is a polysiloxane resin.
Claim 4
Dependent Claim
15 words
An adhesive tape according to claim 2 wherein said polysiloxane resin is a methylpolysiloxane resin.
Claim 5
Dependent Claim
28 words
An adhesive tape according to claim 1 or 2 or 3 wherein the reinforcing sheet comprises a glass cloth having a density of between 15 and 90 gsm.
Claim 6
Dependent Claim
33 words
An adhesive tape according to claim 1 or 2 or 3 wherein the reinforcing sheet comprises a warp of 5 to 12 strands per centimeter and of E.C. 5-5.5 to E.C. 9-68 count.
Claim 7
Dependent Claim
33 words
An adhesive tape according to claim 1 or 2 or 3 wherein the reinforcing sheet is a synthetic polymer sheet selected from the group consisting of a film, a fabric, and a felt.
Claim 8
Dependent Claim
25 words
An adhesive tape according to claim 6 wherein the synthetic polymer is selected from the group consisting of a polyester, a polyimide, and a polycarbonate.
Claim 9
Dependent Claim
27 words
An adhesive tape according to claim 1 or 2 or 3 wherein said mica paper sheet is selected from the group consisting of phlogopite and muscovite mica.
Claim 10
Dependent Claim
21 words
An adhesive tape according to claim 8 wherein said mica paper sheet has a density of 45 gsm to 200 gsm.
Claim 11
Dependent Claim
52 words
An adhesive tape according to claim 1 or 2 or 3 wherein said adhesive layer further comprises a glass cloth having a density of 15 to 90 gsm disposed on the first layer side of said coating and a binder bonding the glass cloth to the inner side of the first layer.
Claim 12
Dependent Claim
58 words
An adhesive tape according to claim 1 or 2 or 3 wherein said adhesive layer further comprises a warp of 5 to 12 strands per centimeter of E.C. 5-5.5 to E.C. 9-68 count glass yarns disposed on the first layer side of said coating and a binder bonding the warp to the inner side of the first layer.
Claim 13
Dependent Claim
59 words
An adhesive tape according to claim 1 or 2 or 3 wherein said adhesive layer further comprises a synthetic polymer sheet selected from the group consisting of a film, a fabric, and a felt disposed on the first layer side of said coating and a binder bonding the synthetic polymer sheet to the inner side of the first layer.
References Cited (Backward Citations)
GB958339A
Cited
GB1193082A
Cited
US3539438A
Cited
US3867245A
Cited
US4400676A
Cited
US4381327A
Cited
US4418241A
Cited
US4456651A
Cited
US4533580A
Cited
CA1199768A
Cited
US4540617A
Cited
US4603088A
Cited
US4606785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |