This invention relates to the field of multiple layer plastic extrusion,
and more particularly to assemblies in which thin or micro-layers of
polymer material are formed which polymer material may be from two or
more individual extruders, and delivered to a multilayer combining
adapter in association with an extruder die or other utilizations. The
combining adapter of this invention is referred to herein as a flow
velocity profiler (FVP) and includes a cartridge assembly body that is
formed with individual cavities that receive one of a plurality of
individual precision layering inserts. Changing individual inserts is
less time intensive than changing an entire body as required in prior
art.