Fibre tip pen with fitted cartridge - is fitted in sectioned plastic housing with reversal cap to cover writing tip and has pressure equalisation openings

摘要

The fibre tip pen has a cartridge fitting into a plastic housing screwed together from an upper section closed at the top adn a lower section which can be closed off when not in use by a reversal cap which forms a conical reduction downwards as a radial guide for the cartridge writing tip. Above the reduction there are stops projecting inwards as a lower radial support a ring shaped shoulder of the cartridge pipe, with below an adjoining indentation of cylindrical shape with radial pressure equalisation openings. The normally longer upper section (1) of the housing as well as the pipe of the cap (2) are extruded from plastic material, whereas the lower section is made from polypropylene.