Abstract: A continuous system for manufacturing a composition that contains an active ingredient that includes a base manufacturing portion and an addition portion. The system can manufacture compositions having different levels of the active ingredient. A base is formed that contains a first level of the active ingredient that is desired for any composition to be manufactured. The addition portion can be used to add more of the materials for the composition to lower the level of the active ingredient, or more active ingredient can be added to increase the level of the active ingredient. The system is controlled by a sensor that measures an amount of associated material that is associated with the active ingredient. This is useful when the active ingredient is not detectable by the sensor.

Abstract: A continuous system for manufacturing a composition that contains an active ingredient that includes a base manufacturing portion and an addition portion. The system can manufacture compositions having different levels of the active ingredient. A base is formed that contains a first level of the active ingredient that is desired for any composition to be manufactured. The addition portion can be used to add more of the materials for the composition to lower the level of the active ingredient, or more active ingredient can be added to increase the level of the active ingredient. The system is controlled by a sensor that measures an amount of associated material that is associated with the active ingredient. This is useful when the active ingredient is not detectable by the sensor.

Abstract: A method for making a polygonal duct from a flat, rectangular panel including the steps of providing longitudinally extending cuts in the panel, folding the panel into the desired polygonal shape, assembling a grip flange to the opposing edge portions of the panel and coupling the grip flanges together. The grip flange is a two-piece grip flange including snap-together male and female sections with cross-sectional shapes similar to an L and an F, respectively, which when snapped together form a panel insertion channel to both frictionally engage the surface of the edge portion of the panel and clamp the edge portion through forcible deformation of the edge portion to form a permanent and secure attachment to the panel without the use of any hardware, adhesive or welding.