US4028160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precured strip method for repairing flexible materials
Assignee: Vinyl-Chem International Inc
•
Filing: 1975-09-17
•
Granted: 1977-06-07
•
Expires: 1995-09-17
Abstract
Abstract Base vinyl material is readied for repair by preparing the edges of a hole to get a clean sharp periphery, and by cleaning the base material. A substantially non-heat shrinkable, precured, vinyl-welding compound having high tensile strength and low fusion point is laid in the hole so that it abuts against the periphery of the hole and then is fused to the base material by heat. The upper exposed surface of the repair is smoothed to present a continuous, uninterrupted surface with the base material. A hard and flexible graining tool is obtained from an impression of the base material. The graining tool is applied to the upper surface of the welding compound after it and the surrounding base material have been heated sufficiently to receive a grain impression.
Inventors
- 👤 Harvey J. Golumbic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:38
CPC Classifications
B; B29; B29C; B29C73/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
157 words
A process for repairing a damaged area in a vinyl base material comprising: a. preparing an area to be repaired in the vinyl base material by making a hole with a sharp, clean edge; b. cleaning the surface of the base material adjacent to the hole with a liquid cleaner; c. drying the cleaned area by removing the liquid cleaner from the cleaned area; d. applying at least one preformed layer of a substantially non-heat shrinking, precured thermoplastic vinyl-welding compound into the hole, each layer having a fusion temperature about equal to that of the vinyl base material and a high tensile strength relative to the vinyl base material, each layer having substantially the same shape and peripheral dimensions as the hole so that the periphery of each such layer butts against the periphery of the hole; and e. fusing each layer to the vinyl base material by the application of heat to the vinyl base material.
Claim 2
Dependent Claim
157 words
A process for repairing a damaged area in a vinyl base material comprising: a. preparing an area to be repaired in the vinyl base material by making a hole with a sharp, clean edge; b. cleaning the surface of the base material adjacent to the hole with a liquid cleaner; c. drying the cleaned area by removing the liquid cleaner from the cleaned area; d. applying at least one preformed layer of a substantially non-heat shrinking, precured thermoplastic vinyl-welding compound into the hole, each layer having a fusion temperature about equal to that of the vinyl base material and a high tensile strength relative to the vinyl base material, each layer having substantially the same shape and peripheral dimensions as the hole so that the periphery of each such layer butts against the periphery of the hole; and e. fusing each layer to the vinyl base material by the application of heat to the vinyl base material.
Claim 3
Dependent Claim
103 words
The process as claimed in claim 1 including the additional step of graining the surface of the last layer by: a. heating the surface of the last layer to soften it; b. applying a graining tool having a grain pattern of the vinyl base material and a die face thereof to the softened surface with the die face on such softened surface; c. maintaining the graining tool on the softened surface under slight pressure to obtain a grain therein; and d. cooling the grained softened surface while maintaining the slight pressure with the graining tool to allow the grained softened surface to harden.
Claim 4
Dependent Claim
60 words
The process claimed in claim 1 wherein the thermoplastic welding compound comprises, in parts by weight, about 0.445 parts of a copolymer of vinyl chloride and polyvinyl acetate, about 0.150 parts of a homopolymer of polyvinyl chloride having a fusion temperature of from between about 325° to 350° F., about 0.395 parts diisodecyl phalate, and minor amounts of a stabilizer.
Claim 5
Dependent Claim
60 words
The process claimed in claim 2 wherein the thermoplastic welding compound comprises, in parts by weight, about 0.445 parts of a copolymer of vinyl chloride and polyvinyl acetate, about 0.150 parts of a homopolymer of polyvinyl chloride having a fusion temperature of from between about 325° to 350° F., about 0.395 parts diisodecyl phalate, and minor amounts of a stabilizer.
Claim 6
Dependent Claim
65 words
The process claimed in claim 2 wherein the graining tool has a backing with the grain pattern of the vinyl base material, the die face grain pattern is in register with the grain pattern on the backing, and the graining tool is applied to the softened area with the grain pattern on the backing in index with the grain pattern of the vinyl base material.
Claim 7
Dependent Claim
22 words
The process claimed in claim 2 wherein the graining tool has a backing with the grain pattern of the vinyl base material.
Claim 8
Dependent Claim
25 words
The process claimed in claim 1 wherein the color of the last precured layer at least approximately matches the color of the vinyl base material.
Claim 9
Dependent Claim
167 words
A process for repairing a damaged area in a vinyl base material comprising: a. preparing an open hole in an area to be repaired in the vinyl base material to obtain a sharp, clean edge bounding the hole; b. cleaning the surface of the base material adjacent to the hole with a liquid cleaner; c. drying the cleaned area by removing the liquid cleaner; d. laying in the hole a precured, preformed layer of vinyl-welding compound of thickness about equal to the thickness of the vinyl base material, wherein the layer has substantially the same geometry as the hole and is formed from a substantially non-heat shrinking liquid thermoplastic vinyl-welding compound having a fusion temperature about equal to that of the vinyl base material and a high tensile strength relative to the vinyl base material into the hole; and e. fusing the layer to the vinyl base material by the application of heat to the vinyl base material after the layer has been laid in the hole.
Claim 10
Dependent Claim
167 words
A process for repairing a damaged area in a vinyl base material comprising: a. preparing an open hole in an area to be repaired in the vinyl base material to obtain a sharp, clean edge bounding the hole; b. cleaning the surface of the base material adjacent to the hole with a liquid cleaner; c. drying the cleaned area by removing the liquid cleaner; d. laying in the hole a precured, preformed layer of vinyl-welding compound of thickness about equal to the thickness of the vinyl base material, wherein the layer has substantially the same geometry as the hole and is formed from a substantially non-heat shrinking liquid thermoplastic vinyl-welding compound having a fusion temperature about equal to that of the vinyl base material and a high tensile strength relative to the vinyl base material into the hole; and e. fusing the layer to the vinyl base material by the application of heat to the vinyl base material after the layer has been laid in the hole.
Claim 11
Dependent Claim
102 words
The process claimed in claim 8 including the additional step of graining the surface of the precured layer by: a. heating the surface of the precured surface to soften it; b. applying a graining tool having the graining pattern of the vinyl base material in die face thereof to the softened surface with the die face on such softened surface; c. maintaining the graining tool on the softened surface under a slight pressure to obtain a grain therein; and d. cooling the grained softened surface while maintaining the slight pressure with the graining tool to allow the grained softened surface to harden.
Claim 12
Dependent Claim
60 words
The process claimed in claim 8 wherein the thermoplastic welding compound comprises, in parts by weight, about 0.445 parts of a copolymer of vinyl chloride and polyvinyl acetate, about 0.150 parts of a homopolymer of polyvinyl chloride having a fusion temperature of from between about 325° to 350° F., about 0.395 parts diisodecyl phalate, and minor amounts of a stabilizer.
Claim 13
Dependent Claim
22 words
The process claimed in claim 9 wherein the graining tool has a backing with the grain pattern of the vinyl base material.
Claim 14
Dependent Claim
25 words
The process claimed in claim 8 wherein the color of the last precured layer at least approximately matches the color of the vinyl base material.
References Cited (Backward Citations)
US3271217A
Cited
US3513048A
Cited
US3620865A
Cited
US3713926A
Cited
US3804685A
Cited
US3810801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |