| 摘要 |
<p>A method is provided for making a superimposed recording on a pre-recorded magnetic audio or video tape (48), and also a device for facilitating such recording. The method involves positioning a shielding member (51) between the erase head of a tape recorder and the tape. The shielding member attenuates the erasing field thus allowing additional intelligence to be recorded on the tape over the original recording. The device comprises attachment means, such as arms (15, 17) with dimples (27,29) for snapping into apertures (30, 32) in the top and bottom walls (34, 36) of a standard audio cassette (13), and also a shielding member (51), for example a flexible strip of material partially or totally impermeable to magnetic field, which extends between the arms and, when the cassette is inserted in a tape recorder, lies between the tape and erase head.</p> |
