Synthetic resin pen nib
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United States of America Patent
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-
Aug 2, 1988
Issued Date -
N/A
app pub date -
Nov 25, 1986
filing date -
Jun 27, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Thermoplastic synthetic resin pen nib is disclosed, which may suitably be employed in writing instruments for fine lettering or for drawing fine lines. The pen nib is formed of thermoplastic crystalline synthetic resin, e.g. polyethylene terephthalate resin, whose molecules are in a specific mixed cystallization structure obtained by controlling the crystallization. This structure consists essentially of molecularly oriented crystals, non-oriented fine crystals dispersed and grown between the oriented crystals, and remaining amorphous regions, and provides the pen nib with highly improved physical and chemical properties.
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