| 摘要 |
<p>Clasping device for portfolio interchangeable-sheets, embodied in only one piece (1) made of plastic material which is composed of a laminate strip properly fixed to the inner face of one of the portfolio covers, rising from the said strip two or more projections (2) like open clamps closely to one of the longitudinal edges of the said laminate strip (1), whilst the same number of projections or pivots (3) having a less width rise closely to the another longitudinal edge, the said projections (3) or pivots being arranged closely to each projection (2) constituting the clamps, preferably in different planes, with the particularity that the free ends (4) of the clamp (2) and pivot (3) pertaining to each couple are overlaped, joined or fastened each other and slightly out of phase with the separation defined between the planes pertaining to each said projection (clamp and pivot) of each said couple, being provided in addition that the strip (1) has in the centre and longitudinally a weakening line (5) which will corrrespond to another provided in the corresponding portfolio in which such a strip (1) is applied in order to allow the portfolio covers to be turned until 45 DEG in a contrary sense to the closure of the said portfolio and to attain therefore the separation of the free overlaped ends (4) of the clamps (2) and pivots (3) to facilitate the change of the filing sheets.</p> |
