Marking instrument
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United States of America Patent
Stats
-
Mar 30, 1999
Grant Date -
N/A
app pub date -
Jul 30, 1997
filing date -
Nov 14, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A marking instrument, such as a reservoir pen, has a valve for controlling communication between a reservoir chamber and a feed channel extending through a feed member to a marking tip. The feed member is retractable to open the valve when the tip is pressed against a surface. A subchamber is confined by a diaphragm sealingly connected between the feed member and the barrel, and when the marking tip is lifted from the surface, the diaphragm pushes the feed member forwardly so that the valve closes, after which the volume of the subchamber increases so that the ink is drawn through the channel from the tip.
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Family
International Classification(s)
Cited Art Landscape
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