US Patent 7780895 Adjustable melt rotation positioning and method

Methods and apparatus adjustably control the repositioning of non-homogeneous fluid conditions across the stream of a laminar flowing fluid to a desirable circumferential position. The invention is particularly applicable to controlling non-homogeneous melt conditions in hot or cold runner systems. Various mechanisms are provided that enable simple adjustments of a flow diverter within a fluid rotation device, making either static or dynamic adjustments, so that the degree of fluid flow repositioning in a runner system can be changed without the need for mold disassembly or retooling. Various forms of actuators effect adjustment and may be manually manipulated or manipulated through various powered devices.