Process for the production of a ball point pen cartridge
AssigneePelikan Aktiengesellschaft
InventorsRudolf Boiko, Gunter Ulrich
Life of this patent
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Abstract
A ball point pen cartridge capable of being pressurized in a pressure vessel including an end stopper having an enlarged section shaped to seal the end of a cartridge tube, a narrower section connected to the enlarged portion and extending into the cartridge, an axial tube running completely through the enlarged section and partly through the narrower section, a radial tube in the narrower section that intersects the axial tube and a flexible, gas impervious tube surrounding the narrower section to form a check valve with the radial tube.
Claims1
Process for production of a great quantity of ball point pen cartridges, the ink columns of which are constantly acted upon by high-pressure gas, characterized by providing at the rear end of each ink tube at a distance from the end of the ink column, a valve which opens into the interior of the ink tube, placing the cartridges into a container, introducing high-pressure gas into the container at a pressure to correspond to the pressure wanted in each cartridge, then reducing the gas pressure in the chamber and removing the cartridges from the chamber.
Dependencies are inferred from the claim text.