Abstract: In a plastic injection anchoring sleeve having an essentially cylindrical sleeve body with a closed front end and an open opposite end for the insertion of an anchoring bolt, the sleeve wall has a plurality of openings closed by flaps which are formed integrally with the sleeve and pivotally supported thereby at their front ends, the flaps being provided with axially extending ribs projecting radially inwardly and having inclined front and rear end portions forming ramps for lifting the flaps outwardly and out of the openings when the sleeve body is removed axially from a molding core after injection molding, or when an anchor bolt is inserted into the sleeve body.

Abstract: A handwriting instrument consists of a top part (1) and a connected intermediate part (2), on the end of which a tip (3) is fastened. To make it possible to insert the intermediate part (2) into the top part (1) rapidly and securely during the assembly of the handwriting instrument, there are two detent elements (5) and two lead-in bevels (8) on the top part (1), which guide two flexible studs (4) into the detent elements (5), where the studs (4) are locked. A sleeve (11) fastened to the intermediate part (2) by means of a bayonet connection (13, 21; 12, 14, 20) covers the studs (4) and the detent elements (5). For easy handling of the writing instrument, there is a grip (18) made of non-slip butt soft rubber on the intermediate part (2).