Marking instrument

B - Operations – Transporting – 43 – K

Patent

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Details

B43K 5/18 (2006.01)

Patent

CA 2220379

A marking instrument, especially a reservoir pen, has a diaphragm (8) which is deflected by retraction of the marking tip to open a port (7) to connect a feed channel (5) to the reservoir (2) containing the marking fluid. A cavity (11) communicating with the port (7) 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 (10) which seals against the feed member (4) 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.

L'invention concerne un instrument de marquage, en particulier un stylo plume à réservoir, pourvu d'un diaphragme (8) qui est défléchi par retrait de la pointe de marquage pour ouvrir un orifice (7) et relier un canal d'alimentation (5) au réservoir (2) contenant le liquide de marquage. Le volume de la cavité (11) communiquant avec l'orifice (7) se réduit lorsque le diaphragme est défléchi pour ouvrir la valve et il s'agrandit lorsque le diaphragme se déplace pour fermer la valve. Le diaphragme dispose d'une jupe (10) intégrée qui s'étend en avant et qui se plaque hermétiquement contre l'élément d'alimentation (4) à l'extrémité antérieure de la jupe. Ces éléments empêchent le liquide de marquage de couler vers la pointe lorsque cela n'est pas nécessaire et les fuites de liquide de marquage entre le diaphragme et l'élément d'alimentation.

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