| 摘要 |
PROBLEM TO BE SOLVED: To provide a free enclosure for a book in which there are no abrasion, nor breakage of an engagement section, and which inhibits detachment of the loaded book. SOLUTION: The free enclosure for the book comprises a pair of enclosure strips. The first enclosure strip consists of: an abbreviation rectangular cover section; a central tongue section which projects in the direction of engagement from the engagement end; and a side tongue section which separates to its both sides and projects in parallel. The second enclosure strip consists of: a substantially rectangular cover section; and a central tongue section which projects in the direction of the engagement from the engagement end. The central tongue section of the second enclosure strip has a long hole for inserting the central tongue section of the first enclosure strip to be wider than the central tongue section of the first enclosure strip formed in its width direction. A covering piece is extended in a width direction and attached to the outside of the one enclosure strip in the neighborhood of the engagement portion of both the enclosure strips, and a holding piece projects from at least one end of the covering piece in the width direction. COPYRIGHT: (C)2008,JPO&INPIT
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