| 摘要 |
<p>The present invention is directed to a travel document folder (22), such as an airline ticket folder, U-rail folder, passport holder, card case, luggage tag, key chain or the like, having a time zone conversion chart (10) rotatably mounted to one leaf (40) of the folder or to the card case or luggage tag. In the preferred embodiment, the time zone conversion chart (10) is made from mounting an inner dial (14) to an outer dial (12) such that the two dials (12, 14) share a common spindle (20) and are arranged concentrically. A time scale in units of hours is provided on the outer dial (12), while geographic location divisions (18) are provided on the inner dial (14). Cities (32) around the world that are located in a common time zone are then grouped and assigned to the geographic location divisions (18). By rotating a local city (32) on the inner dial (14) into alignment with a time (16) on the outer dial (12), a local reference time is established. Then by moving around the inner dial (14) to find the desired city (32), it is possible to look up the local time there by reading off the outer dial (12) the particular hour that is aligned with the desired city (32). In the preferred embodiment, the outer dial (12) is imprinted into the leaf (40) of the travel document folder (22).</p> |
