| 摘要 |
<p>This invention relates to a ribbon of flat material, preferably stiff paper, which is pre-weakened or partially pre-cut along tear lines which define easily separable triangles of the ribbon. The ribbon is rolled within a tubular container for facile removal and separation of one of the separable triangles for a single use as a cleaning device to remove foreign particles which are lodged between human teeth.</p> |
