Process for the production of a ball point pen cartridge
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United States of America Patent
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May 13, 1986
Grant Date -
N/A
app pub date -
Dec 22, 1980
filing date -
Dec 21, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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