| 摘要 |
<p>WRITING INSTRUMENT WITH MOVABLE CLOSURE A writing instrument with a movable closure, having a snap member for automatically closing the opening at the forward portion of the tapered front end of the writing instrument as the writing unit, within the writing instrument, is retracted. The snap member includes, a cylindrical end and a plurality of resilient support segments extending from said cylindrical end and terminating in covers attached to or integrally formed on the ends of the support segments opposite the cylindrical end. These covers provide an airtight seal at the open front end of the writing instrument as they close upon each other in response to the forward movement of the snap member when the writing instrument is placed in its projected, writing position, the snap member is moved rearwardly, out of the open front end of the writing instrument toward the larger diameter section of the tapered front end. Since the resilient support segments are no longer constricted within the narrow diameter front end opening, they expand radially, opening the covers to provide a passage through which the writing unit can pass.</p> |
