| 摘要 |
<p>A cap for writing instruments containing ink, having safety ventilation meams enabling an air flow along the cap, if the cap has lodged in a person's windpipe when swallowed accidentally, the cap being closed on all sides with the exception of an insertion end (4). The safety ventilation means comprising at least one axial ventilation path on the outside of the cap, which along at least part of its axial extension has an open cross-sectional configuration, whereby when a covering is placed around the cap, a cross-sectionl area for ventilation in each radial plane is defined having a throughflow capacity corresponding to the air requirement of a person. The ventilation path being formed by a pair of axial ribs (102) projecting from the outside of the cap and arranged parallel to each other at a distance with an air passage (106) formed therebetween. The ribs (102) are closely spaced to define an air passage therebetween of a mimimum cross-sectional area of 3.4 mm² and have outer side faces (110) tangentially and substantially continuously merging into the peripheral surface of the cap (101).</p> |
