| 摘要 |
A cover folder having a binder and a cover. The binder includes an elongated channel shaped member having a pair of oppositely facing side walls and a pair of ribs, the side walls converging at a slit and defining an interior slot along the length of the elongated channel shaped member. Each rib protrudes into the slot from the interior side of one of the side walls in a direction away from the slit and at an acute angle with the side wall from which it protrudes. The cover is slidably and removably mounted in the binder and includes a sheet and an elongated strip, the sheet being folded to form a pair of cover sheets having a common folded edge. The elongated strip has a lock portion and a securing portion. At least a portion of the securing portion is secured to the exterior side of one of the pair of cover sheets close to the common folded edge and the lock portion protrudes in a direction away from the common folded edge and forms an acute angle at its intersection with the sheet from which the strip is secured. When the cover is inserted into the interior slot of said binder the lock portion of the elongated strip on the cover sheet extends up into the area between the rib and its respective side wall so as to retain the cover within the binder even when the cover is opened.
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