Ink reservoir unit for writing instruments and writing instruments
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United States of America Patent
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Jun 20, 2023
Grant Date -
N/A
app pub date -
Feb 27, 2020
filing date -
Apr 9, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
An ink reservoir unit for a writing instruments using an ink reservoir tube with which low contamination can be achieved considering environmental problems; and a writing instruments using the same. The ink reservoir tube is composed of a composite material in which a raw material is layered on a paper substrate having paper as a substrate. One end section of the ink reservoir tube is coupled to a connection part formed on a writing member or a relay member that holds the writing member to constitute the ink reservoir unit for a writing instrument. In one preferred aspect, a locking device using a male thread formed on an outer peripheral surface is provided to the connection part to be connected to the ink reservoir tube, and the ink reservoir tube is coupled to the relay member that holds the writing member by the locking device.
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