| 摘要 |
A structure of book page for binding a book or album comprising an elongate sheet composed of a plurality of continuous sections each including a wide rectangular portion abutting a narrow rectangular portion divided by a first and a second folding lines, a pair of flap members abutting two ends of the wide rectangular portion and divided by a pair of third folding lines, a pair of trapezoidal indentations in two ends of the narrow rectangular portion engageable with the trapezoidal flap members. Both the flap members and the narrow rectangular portion are folded upward along the second and third folding lines and attached to the upper surface of the wide rectangular portions. Where the sections are folded downward along the first folding lines. So that a continuous double-layer book pages are therefore accomplished with a trapezoidal concave in the inside margin of each of the outmost pages for receiving the trapezoidal flaps of a pair of hard covers.
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