| 摘要 |
<p>A binder (14) comprising a front wall (18), a spaced parallel rear wall (20), a bottom wall (22) connecting the front and rear walls, said walls all being elongated, the front wall being apertured, the rear wall being continuous and solid, the front and rear walls each having outer sides facing away each other and inner sides facing each other, the outer sides of the rear wall being unimpeded, the outer side of the front wall being countersunk at the apertures (30), and the inner side of the rear wall having a recess (34) smaller than and axially aligned with each aperture, a separate pin (16) for each aligned aperture (30) and recess (34), each pin having an undercut head corresponding to its respective countersunk aperture, and a reduced free end opposite the head corresponding to its respective recess, said heads and reduced ends positioning the respective pin in the binder, an outstanding element (42) on each pin (34) adjacent the head thereof, said element having a radial dimension that snaps under the edge portion of a respective aperture to lodge at the inner side of the front wall and lock the pin in place as the head of the pin is seated in its countersink and the reduced end in its recess.</p> |
