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 Title: |
US5230200:
Wallboard and method of joining wallboards
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Douglas, Waymon J.; Lexington, KY 40503
Douglas, Wilburn C.; Nicholasville, KY 40356
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| Assignee: |
None
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| Published / Filed: |
1993-07-27
/ 1990-02-12
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| Application Number: |
US1990000478933
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| IPC Code: |
Advanced:
E04B 2/74;
E04F 21/00;
E04B 2/72;
Core:
more...
IPC-7:
E04B 1/00;
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| U.S. Class: |
Current:
052/746.1;
052/309.9;
052/417;
156/071;
156/275.3;
Original:
052/746;
052/307.9;
052/417;
156/071;
156/275.3;
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| Field of Search: |
052/416,417,419,420,744,309,746
428/703,49,50
156/071,275.3
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| Priority Number: |
| 1988-10-31 |
US1988000264853 |
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| Abstract: |
A wallboard is formed with each of its abutting top and bottom surfaces extending from its rear surface substantially perpendicular thereto for less than 50%, preferably 371/2%, of the distance between the rear surface and the front surface. The wallboard has a convex curved surface extending from the termination of the abutting top or bottom surface to the front surface. When the abutting surfaces of two wallboards are disposed in abutting relation, a deep fill recess is formed between the curved surfaces of the two adjacent wallboards. The recess is filled with a sealing compound having a greater compression strength than the compression strength of each of the adjacent wallboards so that any compression of the wallboards is absorbed by the wallboards and not the sealing compound whereby no tape is required at the wallboard joint and no ridging occurs.
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| Attorney, Agent or Firm: |
Leach, Jr., Frank C. ;
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| Primary / Asst. Examiners: |
Friedman, Carl D.; Mai, Lan M.
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| Maintenance Status: |
E3 Expired Check current status
CC Certificate of Correction issued
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| INPADOC Legal Status: |
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| Parent Case: |
This is a continuation-in-part of U.S. application Ser. No. 07/264,853, filed Oct. 31, 1988, now abandoned.
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| Family: |
None
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First Claim:
Show all 22 claims |
We claim:
1. A method of forming a wallboard joint finished without tape between two wallboards including:
- forming each of the two wallboards with substantially parallel front and rear surfaces;
- forming each of two substantially parallel surfaces of each of the two wallboards substantially perpendicular to the rear surface of the wallboard with each of the two substantially parallel surfaces extending from the rear surface less than one-half of the distance from the rear surface of each of the two wallboards to its front surface;
- forming a connecting surface from an end of each of the two substantially parallel surfaces, remote from the rear surface, of each of the two wallboards to the front surface with the connecting surface being curved at least adjacent the front surface of each of the two wallboards;
- disposing one of the two substantially parallel surfaces of each of the two wallboards in abutting relation with each other to constitute two abutting surfaces so that the two wallboards are adjacent wallboards having a deep fill recess formed between the connecting surfaces of the adjacent wallboards;
- and depositing a sealing compound with a greater compression strength than the compression strength of each of the adjacent wallboards in the deep fill recess formed between the connecting surfaces of the adjacent wallboards so that the sealing compound fills the deep fill recess.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 11 U.S. patent(s) that reference this one
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