Marking instrument
AssigneeThe Gillette Company
InventorRoy Nicoll
Life of this patent
Estimating the term…
Abstract
A marking instrument, especially a reservoir pen, has a diaphragm which is deflected by retraction of a marking tip to open a port to connect a feed channel to the reservoir containing a marking fluid. A cavity communicating with the port has a volume which reduces when the diaphragm deflects to open the valve and increases when the diaphragm moves to close the valve. The diaphragm has an integral forwardly extending skirt which seals against the feed member at the forward end of the skirt. These features are effective in preventing marking liquid flowing to the tip when not required and leakage of marking fluid between the diaphragm and feed member.
Claims16
A marking instrument comprising a feed member with a channel for conducting to a marking tip marking fluid supplied from a reservoir chamber, the channel having an inlet port at a peripheral surface of the feed member, a resilient valve member surrounding and arranged to seal against said peripheral surface for isolating the channel from the reservoir chamber, the feed member being retractable to deflect the valve member to open the port to the reservoir chamber, and a cavity defined between the valve member and the feed member to communicate with the port, deflection of the valve member in the opening direction causing the volume of the cavity to diminish and deflection in the other direction causing an increase in the cavity volume.
A marking instrument comprising a feed member with a channel for conducting to a marking tip marking fluid supplied from a reservoir chamber, the channel having an inlet port at a peripheral surface of the feed member, the exterior of the feed member being stepped to define a shoulder in front of the peripheral surface and an outer surface extending forwardly from the shoulder, and a resilient diaphragm surrounding and arranged to seal against the peripheral surface for isolating the port from the reservoir chamber, the diaphragm being arranged to seal also against said outer surface.
A marking instrument arranged to receive a replaceable cartridge containing marking fluid and comprising a seal element for sealing co-operation with a forward end of the cartridge, said seal element being integral with a diaphragm forming part of a valve which controls flow of marking fluid to a marking tip.
Dependencies are inferred from the claim text.