Abstract: Apparatus for extruding tubular plastic netting including concentric, counterrotatable inner and outer dies mounted in a housing with a space therein for the downward flow of molten plastic to a circular series of holes in each of the dies leading to their respective extrusion orifices, the apparatus having means for splitting the downward flow of plastic into two separate streams, one for the extrusion orifices of the inner die and the other for the extrusion orifices of the outer die, this means being formed substantially to equalize the rate of flow of the plastic to the extrusion orifices. The apparatus is also shown as including a seal arrangement in which a first and a second set of wedge seals protect bearings journalling one of the dies in the housing from the plastic, with the provision of a vent between the sets of seals so as to prevent application of pressure to the second set of seals in the vent the first set leaks.

Abstract: Methods of extruding tubular plastic netting from extrusion orifices in concentric, counterrotatable inner and outer dies in which the plastic filaments extruded therefrom have substantially the same downward relative velocity so as to form netting intersections with substantially no relative shear movement between intersecting filaments.

Abstract: Apparatus for and methods of extruding tubular plastic netting from extrusion orifices in concentric, counterrotatable inner and outer dies in which the plastic filaments extruded therefrom have substantially the same downward relative velocity so as to form netting intersections with substantially no relative shear movement between intersecting filaments.