Extruder feed system. The system includes a pair of spaced-apart, internally and oppositely threaded rotatable elements for receiving and engaging a plastic filament material. An electric motor rotates the rotatable elements in opposite directions thereby to drive the filament into a liquefier chamber for subsequent discharge through a nozzle. The system provides very accurate layer-by-layer build up.

Extruder feed system. The system includes a pair of spaced-apart, internally and oppositely threaded rotatable elements for receiving and engaging a plastic filament material. An electric motor rotates the rotatable elements in opposite directions thereby to drive the filament into a liquefier chamber for subsequent discharge through a nozzle. The system provides very accurate layer-by-layer build up.

A method for laying multiple conductors in a container may be provided. The method may comprise receiving the multiple conductors at a monitoring station; receiving the multiple conductors at a drive; and receiving the multiple conductors at the container.

A method for laying multiple conductors in a container may be provided. The method may comprise receiving the multiple conductors at a monitoring station; receiving the multiple conductors at a drive; and receiving the multiple conductors at the container.

A container may be provided. The container may comprise a first surface and a second surface concentric with the first surface. The first surface and the second surface may define a volume. The volume may house a concentric length of multiple parallel conductors. The multiple parallel conductors may pass through a restricting mechanism to restrict the multiple parallel conductors to pass at the same rate and at the same length.

A container may be provided. The container may comprise a first surface and a second surface concentric with the first surface. The first surface and the second surface may define a volume. The volume may house a concentric length of multiple parallel conductors. The multiple parallel conductors may pass through a restricting mechanism to restrict the multiple parallel conductors to pass at the same rate and at the same length.

Extruder feed system. The system includes a pair of spaced-apart, internally and oppositely threaded rotatable elements for receiving and engaging a plastic filament material. Sn electric motor rotates the rotatable elements in opposite directions thereby to drive the filament into a liquefier chamber for subsequent discharge through a nozzle. The system provides very accurate layer-by-layer build up.

A propeller blade comprises a root, a tip distal from the root, a trailing edge extending from the root to the tip, a trailing edge, e.g. foam, insert, a shell forming an outer surface of the propeller blade and a plurality of stitches of yarn extending through two parts of the shell adjacent the trailing edge, wherein the yarns do not extend through the trailing edge insert.

A propeller blade comprises a root, a tip distal from the root, a trailing edge extending from the root to the tip, a trailing edge, e.g. foam, insert, a shell forming an outer surface of the propeller blade and a plurality of stitches of yarn extending through two parts of the shell adjacent the trailing edge, wherein the yarns do not extend through the trailing edge insert.

Extruder feed system. The system includes a pair of spaced-apart, internally and oppositely threaded rotatable elements for receiving and engaging a plastic filament material. An electric motor rotates the rotatable elements in opposite directions thereby to drive the filament into a liquefier chamber for subsequent discharge through a nozzle. The system provides very accurate layer-by-layer build up.