Fastener fitting for coloured pencils on compasses - consists of U-profile nipple of elastic plastic, with legs to engage around pen and compasses

摘要

The fastener is for use with compasses for school children. The fastener nipple (2) consists of an elastic plastic material, and has a U-profile. The legs of the nipple act as contact pressure surfaces (2a). They are of a length to engage around both sides of the compass leg (1) and the pen (3). The legs extend towards each other in direction of nipple opening, and leave only a slot. Knobs on the inside of the contact pressure surfaces form pressure points. ADVANTAGE - Quick fastening and removal of varying pens and ballpoint refills, due to own stress and nipple material flexibility.