Patent US2191380A successfully refreshed from Google Patents.
Patent US3125941A successfully refreshed from Google Patents.
US3908549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive fuse-cord
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1973-08-24
•
Granted: 1975-09-30
•
Expires: 1993-08-24
Abstract
Abstract An explosive fuse-cord suitable for underwater use, comprising a core of powdered explosive material enclosed in a tubular continuous layer of hot melt waterproof adhesive composition disposed immediately around the core. The invention also includes a method of manufacturing fuse-cord in which an explosive core is fed into a tube of hot melt adhesive material as the tube is being formed and the tube is heated to effect continuity of the adhesive material.
Inventors
- 👤 Trevor John Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:37
CPC Classifications
C; C06; C06C; C06C5/00; C06C5/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
62 words
AN EXPLOSIVE FUSE-CORD COMPRISING A CORE OF WATER DESENSITISABLE EXPLOSIVE MATERIAL SURROUNDED BY AT LEAST ONE LAYER OFF TEXTILE MATERIAL AND A TAPE COMPRISING ZA LAYER OF HOT MELT ADHESIVE COMPOSITION ON A SUPPORTING SUBSTRATE WRAPPED IMMEDIATELY AROUND SAID CORE, SAID HOT MELT ADHESIVE FORMING A TUBULAR CONTINUOUS LAYER DISPOSED BETWEEN SAID CORE OF EXPLOSIVE MATERIAL AND SAID LAYER OF TEXTILE MATERIAL.
Claim 2
Dependent Claim
62 words
AN EXPLOSIVE FUSE-CORD COMPRISING A CORE OF WATER DESENSITISABLE EXPLOSIVE MATERIAL SURROUNDED BY AT LEAST ONE LAYER OFF TEXTILE MATERIAL AND A TAPE COMPRISING ZA LAYER OF HOT MELT ADHESIVE COMPOSITION ON A SUPPORTING SUBSTRATE WRAPPED IMMEDIATELY AROUND SAID CORE, SAID HOT MELT ADHESIVE FORMING A TUBULAR CONTINUOUS LAYER DISPOSED BETWEEN SAID CORE OF EXPLOSIVE MATERIAL AND SAID LAYER OF TEXTILE MATERIAL.
Claim 3
Dependent Claim
20 words
A fuse-cord as claimed in claim 1 wherein the tape is curved along its longitudinal axis to surround the core.
Claim 4
Dependent Claim
22 words
A fuse-cord as claimed in claim 1 wherein the edges of the tape are overlapped and heat sealed at the overlapped portions.
Claim 5
Dependent Claim
23 words
A fuse-cord as claimed in claim 1 wherein the hot melt adhesive composition has a bonding temperature in the range 50* to 90*C.
Claim 6
Dependent Claim
22 words
A fuse-cord as claimed in claim 4 wherein the hot melt adhesive has a bonding temperaTure in the range 60* to 80*C.
Claim 7
Dependent Claim
31 words
A fuse-cord as claimed in claim 1 wherein the hot melt adhesive composition is selected from the group consisting of protein glue, wax, cellulose ester, cellulose ether and synthetic organic polymer.
Claim 8
Dependent Claim
39 words
A fuse-cord as claimed in claim 6 wherein the hot melt adhesive composition is selected from the group consisting of polyvinyl ester, polyvinyl acetal, polyamide and a terpolymer rubber consisting of ethylene and propylene terpolymerised with an unsaturated hydrocarbon.
Claim 9
Dependent Claim
34 words
A fuse-cord as claimed in claim 7 wherein the hot melt adhesive is selected from the group consisting of a copolymer of vinyl acetate and ethylene and a terpolymer of ethylene, propylene and butadiene.
Claim 10
Dependent Claim
17 words
A fuse-cord as claimed in claim 1 wherein the hot melt adhesive composition comprises a tack resin.
Claim 11
Dependent Claim
29 words
A fuse-cord as claimed in claim 9 wherein the tack resin is selected from the group consisting of coumaroneindene tack resin, a terpene tack resin and a rosin derivative.
Claim 12
Dependent Claim
31 words
A fuse-cord as claimed in claim 10 wherein the tack resin is selected from the group consisting of hydrogenated rosin, dehydrogenated rosin and an ester of any of the said rosins.
Claim 13
Dependent Claim
26 words
A fuse-cord as claimed in claim 11 wherein the tack resin is selected from the group consisting of a hydrogenated rosin esterified with glycerol and pentaerythritol.
Claim 14
Dependent Claim
98 words
An explosive fuse-cord comprising a core of water desensitisable explosive material surrounded by at least one layer of textile material and at least two tapes wrapped around the core, each tape comprising a layer of hot melt adhesive composition on a supporting substrate, said tapes being oriented so that the substrates alternately face inwards and outwards with edges overlapping and the adhesive material of the overlapping portions facing each other and heat sealed together to form a tubular continuous layer of hot melt adhesive composition disposed between said core of explosive material and said layer of textile material.
Claim 15
Dependent Claim
98 words
An explosive fuse-cord comprising a core of water desensitisable explosive material surrounded by at least one layer of textile material and at least two tapes wrapped around the core, each tape comprising a layer of hot melt adhesive composition on a supporting substrate, said tapes being oriented so that the substrates alternately face inwards and outwards with edges overlapping and the adhesive material of the overlapping portions facing each other and heat sealed together to form a tubular continuous layer of hot melt adhesive composition disposed between said core of explosive material and said layer of textile material.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |