Indian ink pen with cylinder and tube forming chamber - with non-wettable film free of silicone resin paste on inner surface of tube

摘要

Indian ink pen comprises a compensation chamber in the form of a channel consisting of grooves, e.g. of helical shape, formed in the outer cylindrical surface introduced into a tube whose inner surface forms one of the channel walls. The inner surface of the tube is coated with a film of non-wettable material, pref. a film of silicone paste. The film facilitates extrn. of the components, and is moisture-resistant which prevents a capillary effect. Also, the film prevents the components from becoming clogged with ink. The use of a film of silicone paste is the most economical to ensure good coating of the components.