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 Title: |
US4290248:
Continuous process for forming products from thermoplastic polymeric material having three-dimensional patterns and surface textures
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Kemerer, William J.; Pittsburgh, PA 15237
Vassar, Clyde W.; Cholchester, VT
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| Assignee: |
Kemerer; William James, Long Beach, CA
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| Published / Filed: |
1981-09-22
/ 1975-12-10
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| Application Number: |
US1975000639328
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| IPC Code: |
Advanced:
B29C 43/22;
B29C 47/00;
B29C 47/12;
B29C 69/02;
IPC-7:
E04C 1/00;
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| ECLA Code: |
B29C43/22B; B29C43/22C; B29C47/00L; B29C47/12D; L29C47/00; L29K105/04C; L29K995/00F19B; L29L7/00B; L29L16/00; L29C47/00J9; L29C47/00J10; L29C47/00L; L29C47/00L4; L29C47/00L7;
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| U.S. Class: |
Current:
052/309.16;
052/314;
052/555;
052/558;
264/046.1;
264/167;
264/171.13;
264/210.1;
Original:
052/309.16;
052/314;
052/555;
052/558;
264/046.1;
264/167;
264/171;
264/210.1;
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| Field of Search: |
264/210 R,171,46.1,177 R,210,210.1
425/371
052/309.7,309.16,314,555,558
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| Priority Number: |
| 1975-12-10 |
US1975000639328 |
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| Abstract: |
A continuous process and apparatus are disclosed for forming products from thermoplastic polymeric material having three-dimentional patterns and surface textures on one or both faces that may be similar or dissimilar with or without a continuously changing profile and with or without shaped edges, such as shake shingle panels, board and batten panels, rough barn board panels, wainscoting panels, brick panels, stone panels, patterned door panels, similar structural wall panels, roofing or siding panels, ribbed soffits, fascia board, flooring reinforced with egg crate ribs, forms for pouring contoured concrete structures, and other three-dimensional pattern and surface textured plastic products which may extend in widths up to 4 feet or more and in lengths up to 20 feet or more.
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| Attorney, Agent or Firm: |
Krayer, William L. ;
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| Primary / Asst. Examiners: |
Pavelko, Thomas P.;
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Parent Case: |
RELATED PATENT APPLICATION
This application is a continuation-in-part of prior copending application, Ser. No. 538,645, filed Jan. 6, 1975, now abandoned.
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| Family: |
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First Claim:
Show all 24 claims |
We claim:
1. A continuous impression molding process for making three-dimensional patterns on thermoplastic polymeric material comprising the steps of:
- continuously providing a heated ribbon of substantially uniform thickness of said material in a plastic state at a temperature above its glass transiton temperature,
- initially pressing opposed endless flexible belt molds, at least one of which has a three-dimensional rubber pattern form with abrupt changes in profile extending longitudinally of the belt and in surface contour extending transversely of the belt, against opposite sides of said heated ribbon while its temperature is above its glass transition temperature, so as to displace at least a portion of said ribbon in a continuous progressive localized pinching nip action with sufficient initial pressure for impressing a three-dimensional pattern on the heated material of said ribbon,
- moving said opposed flexible belt molds and carrying said impressed material along between said opposed molds while exerting sufficient pressure against opposite sides of the material to retain said three-dimensional pattern therein,
- cooling said moving opposed molds for cooling said impressed material down to a temperature in its memory retention state to cause said cooled material to retain said three-dimensional pattern, and
- removing the cooled impressed material from between the opposed molds.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 149 U.S. patent(s) that reference this one
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