US3966857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication of extruded materials
Assignee: Congoleum Corp
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Filing: 1969-12-31
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Granted: 1976-06-29
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Expires: 1989-12-31
Abstract
Abstract A method for extruding synthetic resinous materials including introducing a mixture of softened variously or similarly colored or clear resinous chips into an extruder, coating the chips with a coating agent such as a lubricant in the barrel of the extruder, extruding the mixture through an extrusion die thereby to produce a finished product of fused resinous chips maintaining good color definition between the chips.
Inventors
- 👤 Ralph W. Charlton
- 👤 Seevaram N. Varadhachary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:38
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C48/00; B29C48/16; B29C48/17; B29C48/175; B29C48/25; B29C48/285; B29C48/29; B29C48/94; B29C48/95; B29C48/022; B29C48/03; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
228 words
A method of producing an extruded resinous product having a mosaic-like appearance wherein the surface of the product is characterized by a plurality of random distinct lines of demarcation dividing the surface of the product into a plurality of distinct adjacent areas comprising: a. providing a blend of thermoplastic resinous chips selected from the group consisting of polyvinyl chloride, polyurethane, polyethylene, polypropylene, polyvinyl copolymers and mixtures thereof, b. feeding said blend of thermoplastic resinous chips to the barrel of an extruder at the hopper end of the extruder, c. softening and moving said blend of thermoplastic resinous chips in the barrel of the extruder without melting said chips, d. applying a liquid lubricative coating agent selected from the group consisting of lubricating oils, paraffinic hydrocarbons, mineral oils, and oil fractions of petroleum to said softened blend of thermoplastic resinous chips by injecting said lubricative coating agent into the barrel of the extruder downstream from the hopper end thereof, and feeding said blend and said agent in said barrel towards the extrusion end of said extruder while mixing the same, and e. extruding said softened blend of thermoplastic resinous chips into a desired product wherein substantially all of said thermoplastic resinous chips retain their individuality in said product, f. thereby producing an extruded product having a mosaic-like appearance in which said thermoplastic chips are visually distinct one from another.
Claim 2
Independent Claim
228 words
A method of producing an extruded resinous product having a mosaic-like appearance wherein the surface of the product is characterized by a plurality of random distinct lines of demarcation dividing the surface of the product into a plurality of distinct adjacent areas comprising: a. providing a blend of thermoplastic resinous chips selected from the group consisting of polyvinyl chloride, polyurethane, polyethylene, polypropylene, polyvinyl copolymers and mixtures thereof, b. feeding said blend of thermoplastic resinous chips to the barrel of an extruder at the hopper end of the extruder, c. softening and moving said blend of thermoplastic resinous chips in the barrel of the extruder without melting said chips, d. applying a liquid lubricative coating agent selected from the group consisting of lubricating oils, paraffinic hydrocarbons, mineral oils, and oil fractions of petroleum to said softened blend of thermoplastic resinous chips by injecting said lubricative coating agent into the barrel of the extruder downstream from the hopper end thereof, and feeding said blend and said agent in said barrel towards the extrusion end of said extruder while mixing the same, and e. extruding said softened blend of thermoplastic resinous chips into a desired product wherein substantially all of said thermoplastic resinous chips retain their individuality in said product, f. thereby producing an extruded product having a mosaic-like appearance in which said thermoplastic chips are visually distinct one from another.
Claim 3
Dependent Claim
24 words
A method as in claim 9 and wherein: a. said blend of thermoplastic resinous chips comprises a blend of variously colored thermoplastic resinous chips.
References Cited (Backward Citations)
US2298846A
Cited
US2806254A
Cited
US2477170A
Cited
US2540146A
Cited
US2798258A
Cited
US3049761A
Cited
US2857624A
Cited
US3066356A
Cited
US3148412A
Cited
US3121914A
Cited
US3484507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |