| 摘要 |
A closed portable card file comprises a base, cover, retractable carrying handle and a releasable latch to hold the cover closed. The back of the cover is square and extends down behind the back of the base and is hinged near the bottom of the base so that when the card file is in closed condition the back of the cover is approximately perpendicular to the base and when the card file is open, the back of the cover lies approximately in the plane of the base. Hence the card file can stand upright on the back of the cover when closed. When the card file is open and rests on a horizontal surface, the cover stands upright and is retained in open position by its weight. The base has rails for receiving notched cards and guides, and ribs which are parallel to the rails and are of a height to engage lower edges of the cards and guides and thereby reduce wear on the notches which receive the rails.
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