Abstract: An extruder, granule feed, and liquid additive dispenser system for 3D printers, having a mobile print head (1) with a substantially vertical extruder barrel (17) and a throat (18) which, at the upper area whereof, includes a mobile funnel-shaped hopper (10?) for the receiving of the granules (2) and a rotating internal worm (19). The mobile hopper (10?) presents curved indentations (28) that progress inward in the rotational direction of the worm, seeking langency to the mouth (29). The worm (19) includes, as an extension to its thread (26), a drag shovel (20) complementary to the mobile hopper (10?) with a sloping internal thrust face (27) that links with its cavity (25) and draws inward the granules contained in the hopper (10?) via the indentations.

Abstract: An anchor assembly (1) that has two hooks (2, 3) pivotably connected by a rotary shaft (4). A distal end of each hook has a tooth (21, 31) and the other end, a slot (22, 32). The assembly has an insertion configuration (P1) where hooks (2, 3) are superposed, and a securing configuration (P2) where teeth (21, 31) are separated whereby hooks (2, 3) project to remain retained in an inner support surface (51).

Abstract: The invention relates to a scissor-type securing element (1) comprising two hooks (2, 3) pivotably connected together by a rotary shaft (4), a distal part being defined in each hook (2, 3) on one side of the shaft (4) and a proximal part being defined on the other side of the shaft (4), each distal part being provided with a tooth (21, 31) and each proximal part being provided with a penetrating slot (22, 32). According to the invention, the securing element has an insertion configuration (P1) in which the hooks (2, 3) are superposed, and a securing configuration (P2) in which the teeth (21, 31) are in a more separated position and the hooks (2, 3) project so as to remain retained in an inner support surface (51) of a case (5).