Synthetic resin pen unit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 20, 1989
Issued Date -
N/A
app pub date -
Oct 15, 1987
filing date -
Apr 14, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A synthetic resin pen unit has a cylindrical outer annular member with inwardly extending bent and straight members. Each bent member has a base portion extending from the inner wall so that it is inclined with respect to a phantom line connecting the base of the bent member to the central axis of the cylindrical member. Ink grooves are formed between the inwardly extending members. The flexibility of the pan unit is a function of the percentage of bent members so that by proper selection and arrangement the pen characteristics can be optimized.
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Cited Art Landscape
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