Patent ID: 7048819
Filing Date: 2006-05-23
Classification: B29C

Abstract:
1. A hot air chamber device comprising: a heating area, at least one lamination chamber with a product inlet at a first end and a product outlet at a second end, said lamination chamber having a first air flow duct and a second air flow duct in communication with said heating area, and a fan; wherein air is heated in said heating area, heated air then being forced by said fan through said first air flow duct into a hot air plenum in said lamination chamber, said heated air passing through said hot air plenum and being drawn through said second air flow duct back into said heating area; such that a temperature of said lamination chamber is constant throughout, and negligible air flow occurs through said product inlet and said product outlet due to cancellation of a buoyancy effect of said heated air by an opposing Venturi effect of air moving at high speed through said first air flow duct.