Patent US3917890A successfully refreshed from Google Patents.
US3917890A
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US
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Composite tape and method of forming the same
Assignee: Individual
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Filing: 1973-03-14
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Granted: 1975-11-04
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Expires: 1993-03-14
Abstract
Abstract A method of forming a composite tape having a foraminous fiberglass core includes the step of treating a continuous strip of foraminous material with adhesion promoting and stiffening material. The treated strip is preheated to a temperature approximately equal to the extruding temperature of two ribbons of flexible vinyl thermoplastic material which are simultaneously formed in a subsequent step and coated on each side of the heated fiberglass core material. The coated tape is then progressively compressed to impart to the composite tape uniform desired thickness. Such compression also forces at least portions of the extruded two ribbons into the interstices of the foraminous core material to cause the opposing ribbons to fuse to each other by penetrating and filling the interstices to form a unitary mass. The composite tape is then cooled to substantially room temperature wherein the final plastic coating hardens. The resulting composite tape comprises an elongate foraminous strip of fiberglass core material. A coating of a flexible vinyl polymer thermoplastic material having substantially uniform thickness encloses the core material along its length. The coating comprises two opposing ribbons one on each side of the strip at least portions of which penetrate and fill the interstices to form a unitary bonded mass.
Inventors
- 👤 Sidney Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:02
CPC Classifications
B; B29; B29C; B29C70/00; B29K; B29K2309/00; B29K2309/08; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/109; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518; Y10T428/31855; Y10T442/00; Y10T442/20; Y10T442/2025
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
159 words
A METHOD OF FORMING A COMPOSITE TAPE HAVING A FORAMINOUS FIBERGLASS CORE, COMPRISING THE STEPS OF TREATING A CONTINUOUS OF FORAMINOUS CORE MATERIAL WITH ADHESION PROMOTING AND STIFFINING MATERIAL, PREPHEATING THE CONTINUOUS STRIP OF THE FORAMINOUDS CORE MATERIAL, PASSING TH CORE MATERIA THROUGH AN EXTRUSION HEAD AND DIE OF A RESIN MATERIAL EXTRUSION DEVICE AND EXTRUDING THE RESIN MATERIAL THERETHROUGH, APPLYING A COATING OF RESIN MATERIAL TO EACH SIDE OF THE FIBERGLASS CORE MATERIAL DURING THE COURSE OF PASSAGE THROUGH THE EXTRUSION HEAD AND PRIOR TO ITS EMERGENCE FROM THE EXTRUSION DIE, MAINTAINING THE RESIN MATERIAL AT SUBSTANTIALLY THE EXTRUSION PRESSURE DURING PASSAGE OF THE CORE MATERIAL THROUGH THE DIE TO FORCE THE SAME INTO THE INTERSTICES OF THE FORAMINOUS CORE MATERIAL PIOR TO EMERGENCE FROM THE DIE OPENING TO IMPART A UNIFORM LAYER OF RESIN MATERIAL ABOUT THE FIBERGLASS CORE MATERIAL, AND COOLING THE RESULTING COMPOSITE TAPE TO A TEMPERATURE WHICH SUBSTANTIALLY HARDENS THE COATED PLASTIC RIBBON MATERIAL.
Claim 2
Independent Claim
159 words
A METHOD OF FORMING A COMPOSITE TAPE HAVING A FORAMINOUS FIBERGLASS CORE, COMPRISING THE STEPS OF TREATING A CONTINUOUS OF FORAMINOUS CORE MATERIAL WITH ADHESION PROMOTING AND STIFFINING MATERIAL, PREPHEATING THE CONTINUOUS STRIP OF THE FORAMINOUDS CORE MATERIAL, PASSING TH CORE MATERIA THROUGH AN EXTRUSION HEAD AND DIE OF A RESIN MATERIAL EXTRUSION DEVICE AND EXTRUDING THE RESIN MATERIAL THERETHROUGH, APPLYING A COATING OF RESIN MATERIAL TO EACH SIDE OF THE FIBERGLASS CORE MATERIAL DURING THE COURSE OF PASSAGE THROUGH THE EXTRUSION HEAD AND PRIOR TO ITS EMERGENCE FROM THE EXTRUSION DIE, MAINTAINING THE RESIN MATERIAL AT SUBSTANTIALLY THE EXTRUSION PRESSURE DURING PASSAGE OF THE CORE MATERIAL THROUGH THE DIE TO FORCE THE SAME INTO THE INTERSTICES OF THE FORAMINOUS CORE MATERIAL PIOR TO EMERGENCE FROM THE DIE OPENING TO IMPART A UNIFORM LAYER OF RESIN MATERIAL ABOUT THE FIBERGLASS CORE MATERIAL, AND COOLING THE RESULTING COMPOSITE TAPE TO A TEMPERATURE WHICH SUBSTANTIALLY HARDENS THE COATED PLASTIC RIBBON MATERIAL.
Claim 3
Dependent Claim
43 words
A method of forming a composite tape as defined in claim 1, wherein said treating step comprises advancing the continuous strip of foraminous material through a bath of acrylic emulsion solution which improves adhesion between the fiberglass core material and vinyl plastic polymers.
Claim 4
Dependent Claim
33 words
A method of forming a composite tape as defined in claim 2, further comprising the step of first thinning said acrylic emulsion solution to 20 percent solids by weight by addition of water.
Claim 5
Dependent Claim
35 words
A method of forming a composite tape as defined in claim 2, further comprising the step of drying the treated strip of foraminous material to reduce the residual volatile solvent and water to under 10%.
Claim 6
Dependent Claim
37 words
A method of forming a composite tape as defined in claim 4, further including the step of removing excess acrylic emulsion solution subsequent to advancing the strip through the bath and prior to drying the heated strip.
Claim 7
Dependent Claim
30 words
A method of forming a composite tape as defined in claim 2, wherein said preheating step comprises heating fiberglass material to reduce the volatiles in the solution to under 2%.
Claim 8
Dependent Claim
27 words
A method of forming a composite tape as defined in claim 1, wherein said preheating step comprises heating the fiberglass material to approximately between 335* and 365*F.
Claim 9
Dependent Claim
36 words
A method of forming a composite tape as defined in claim 1, wherein said preheating step comprises heating the fiberglass material to a temperature substantially equal to the extrusion temperature of the ribbons of plastic material.
Claim 10
Dependent Claim
28 words
A method of forming a composite tape as defined in claim 1, further comprising the step of tensioning the strip of foraminous material prior to said preheating step.
Claim 11
Dependent Claim
21 words
A method of forming a composite tape as defined in claim 1, wherein said extruding step comprises extruding a vinyl polymer.
Claim 12
Dependent Claim
21 words
A method of forming a composite tape as defined in claim 10, wherein said vinyl polymer thermoplastic contains non-migratory epoxy-type plasticizers.
Claim 13
Dependent Claim
70 words
A method of forming a composite tape as defined in claim 1, wherein said interstices in the strip of foraminous material represent an effective open area of approximately between 20 and 60 percent, and wherein said pressure maintaining step comprises progressively applying increased pressures to the coated core material and causing the opposing ribbons to fuse to each other by penetrating and filling said interstices to form a unitary mass.
Claim 14
Dependent Claim
32 words
A method of forming a composite tape as defined in claim 1, wherein said cooling step comprises the step of quenching the composite tape in a cooling tank to essentially room temperature.
Claim 15
Dependent Claim
22 words
A method of forming a composite tape as defined in claim 1, wherein said extruding step comprises extruding a non-migratory vinyl plastic.
Claim 16
Dependent Claim
74 words
A method of forming a composite tape as defined in claim 1, wherein the step of passing the core material through the die comprises passing the core material through a substantially rectangular slot having a height clearance equal to the desired thickness of said core material and the combined thicknesses of two coatings deposited on each side of the core material and a width clearance substantially equal to the width of said core material.
Claim 17
Dependent Claim
97 words
A COMPOSITE TAPE COMPRISING AN ELONGATE FORAMINOUS STRIP OF FIBERGLASS CORE MATERIAL, A COATING OF VINYL POLYMER PLASTIC MATERIAL HAVING SUBSTANTIALLY UNIFORM THICKNESS ENCLOSING SAID CORE MATERIAL ALONG ITS LENGTH, SAID COATING COMPRISING TWO OPPOSING RIBBONS ONE ON EACH SIDE OF SAID STRIP AT LEAST PORTIONS OF WHICH PENETRATE AND FILL THE INTERSTICES TO FORM A UNITARY BONDED MASS, AND AN ADHESION PROMOTING AND STIFFENING AGENT BETWEEN SAID STRIP OF FIBERGLASS AND SAID VINYL PLASTIC MATERIAL WHICH PROMOTES THE BONDING PROPERTIES BETWEEN SAID STRIP AND PLASTIC MATERIAL AND IMPROVES THE SRIFFNESS AND HANDLING EASE OF THE TAPE.
Claim 18
Dependent Claim
97 words
A COMPOSITE TAPE COMPRISING AN ELONGATE FORAMINOUS STRIP OF FIBERGLASS CORE MATERIAL, A COATING OF VINYL POLYMER PLASTIC MATERIAL HAVING SUBSTANTIALLY UNIFORM THICKNESS ENCLOSING SAID CORE MATERIAL ALONG ITS LENGTH, SAID COATING COMPRISING TWO OPPOSING RIBBONS ONE ON EACH SIDE OF SAID STRIP AT LEAST PORTIONS OF WHICH PENETRATE AND FILL THE INTERSTICES TO FORM A UNITARY BONDED MASS, AND AN ADHESION PROMOTING AND STIFFENING AGENT BETWEEN SAID STRIP OF FIBERGLASS AND SAID VINYL PLASTIC MATERIAL WHICH PROMOTES THE BONDING PROPERTIES BETWEEN SAID STRIP AND PLASTIC MATERIAL AND IMPROVES THE SRIFFNESS AND HANDLING EASE OF THE TAPE.
Claim 19
Dependent Claim
29 words
A composite tape as defined in claim 15, wherein said unfilled interstices in said strip of foraminous material represents an open area of approximately between 20 and 60 percent.
Claim 20
Dependent Claim
17 words
A composite tape as defined in claim 15, wherein said vinyl polymer thermoplastic contains non-migratory epoxy-tape plasticizers.
Claim 21
Dependent Claim
18 words
A composite tape as defined in claim 18, wherein said agent contains residual volatiles plus water under 2%.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |