| 摘要 |
MDT 076 P2 of The Disclosure A binder having a rectangular stiffener board and a sheet retaining assembly. The stiffener board is provided in its first surface with at least three spaced parallel channels medially located between the side edges of the board. Each channel defines a hinge line extending along the height of the stiffener board. The sheet retaining assembly is mounted on the first surface of the board adjacent to the channels but outside the medial section of the board where the channels are located. The binder thus structured allows the stiffener board to define front and rear cover of the binder interconnected by the medial section which is foldable conformingly about the retaining assembly.
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