Method of reshaping a gypsum board core and products made by same
US5198052A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1990 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Oct 22, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1023
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for making gypsum wall board in which during the production of the board pressure is applied to a portion or all of the board surface to reshape, compress and densify the gypsum core to change the shape or contour the face surface of the gypsum board. The pressure must be applied in a systematic fashion to avoid creating lateral shifting or shear stresses in the gypsum core or between the core and paper surface to avoid destroying the paper to gypsum core band. The method can be used to product a cross taper at the cut ends of the board, to produce a decoratively shaped board surface and to densify the entire board core for special gypsum board applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.