Retractable capless marking pen
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 10, 1985
Grant Date -
N/A
app pub date -
Feb 24, 1984
filing date -
Feb 25, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A retractable capless marking pen using an oil ink or an aqueous ink, having a retractable writing member consisting of a small diameter portion and a large diameter portion, and having a constitution capable of preventing the evaporation of the ink by storing the writing head of the writing member hermetically within a sealed elastic cylinder. The constitution comprises a fixed pressing protrusion provided within the sheath, an elastic cylinder enclosing part of the small diameter portion of the writing member, an elastic pressing member having a slanting surface adapted to engage the pressing protrusion and adapted to squeeze the open end of the elastic cylinder as the slanting surface engages the pressing protrusion when the writing member is moved toward the retracted position so that the writing head of the writing member is stored hermetically within the elastic cylinder between the closed front end of the elastic cylinder and the rear end thereof and is sealed by sealing means after the writing head of the writing member has been retracted fully into the sheath.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully