Apparatus for targeted delivery of additives to varying layers in gypsum panels

US7811413B2 · kind B2 · utility

Assignee

• BPB Limited · GB

Inventors

• Mark E. Hennis · Indian Rocks Beach, US
• Michael Fahey · Medway, US
• Robert J. Hauber · Land O' Lakes, US
• Matthew J Chowing · Cody, US
• Gerald D. Boydston · Cody, US
• Troy R. Stuart · Cody, US

Key dates

• Filing date: Sep 25, 2008
• Grant date: Oct 12, 2010
• Expiry date: Sep 25, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T156/1062
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A multilayer gypsum board forming device, and a gypsum additive delivery system in which additives are delivered to one or more layers of a multi layered gypsum board panels, including engineered polymers, includes at least one additive assembly connected in-line with a first gypsum delivery receptacle for providing an additive fluid feed into the stream of a first gypsum slurry being transported through said first gypsum delivery receptacle for homogenously adding an additive to the first gypsum slurry, and a second gypsum delivery receptacle transporting a second gypsum slurry, in fluid communication with the mixer providing the first gypsum slurry, having a different set of characteristics from those of the first gypsum slurry. At least one outer surface including a polymeric compound or wax emulsion additive entrained therein essentially encases the core gypsum within two facing layers.