| 摘要 |
PROBLEM TO BE SOLVED: To provide a size-adjustable book cover which can be adapted to various sizes of books. SOLUTION: The size of the book cover can be adjusted by sewing the upper part of an insertion part mounted at one end of a main cover of the book cover, sewing the lower part of an insertion part mounted at one end of a rectangular lower cover overlapping with the main cover so as to envelope the same, adjusting an overlapping degree of the main cover with the lower cover to adjust a vertical size of the book, and changing a folding line of one end where no insertion part of the cover mounted to adjust a lateral size and a thickness of the book. COPYRIGHT: (C)2009,JPO&INPIT
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