公开(公告)号：US5084786A

公开(公告)日：1992-01-28

申请号：US224655

申请日：1988-07-27

申请人： Kazutoshi Konno ,  Hidehumi Goto ,  Hiroshi Chiba ,  Tohru Sampei

发明人： Kazutoshi Konno ,  Hidehumi Goto ,  Hiroshi Chiba ,  Tohru Sampei

IPC分类号： G11B5/008 ,  G11B5/53 ,  G11B15/467 ,  G11B20/10 ,  G11B20/12

CPC分类号： G11B15/4678 ,  G11B20/10 ,  G11B20/1209 ,  G11B5/008 ,  G11B5/0086 ,  G11B5/534 ,  G11B20/1211 ,  G11B2220/90 ,  G11B2220/913

摘要： A helical scan tape apparatus including a first pair of magnetic heads having mutually different azimuth angles disposed on a peripheral face of a rotary drum at an angle interval of 180 degrees so as to oppose each other, a second pair of magnetic heads disposed on of the rotary drum so as to be perpendicular to a disposition direction of the first magnetic heads, a magnetic tape helically wound around the rotary drum so as to extend over an angle of 90 degrees, the tape being moved while the drum is controlled to rotate in synchronism with a reference signal, the first magnetic heads having a wider gap width than a track pitch of tracks recorded on the tape without providing a guard band for enabling azimuth recording of a data signal on the tracks, the data signal being recorded repeatedly into a particular recording area, wherein the first magnetic heads are used substantially for recording and the second magnetic heads are used substantially for reproduction and are positioned with a downward shift in the height direction of the drum equivalent to half of a scanning width of the second magnetic heads as compared with said first magnetic heads. Alternatively, the second magnetic heads may be disposed with a predetermine amount of shift so that an end of said second magnetic heads opposite to a tape traveling direction is located within a track recorded in advance by a predetermined value.

摘要翻译： 一种螺旋扫描带装置，包括第一对磁头，其具有相互不同的方位角，以相对于180度的角度间隔设置在旋转磁鼓的外周面上;第二对磁头， 旋转鼓，以便垂直于第一磁头的配置方向，以旋转磁鼓的方式螺旋缠绕以便延伸超过90度的角度的磁带，当磁鼓被控制同步旋转时磁带被移动 具有参考信号，第一磁头具有比记录在磁带上的轨道的轨道间距更宽的间隙宽度，而不提供用于使得轨道上的数据信号的方位记录的保护带，数据信号被重复记录到特定的 记录区域，其中第一磁头用于基本上用于记录，并且第二磁头用于基本上用于再现，并且被定位 相对于所述第一磁头，h相对于第二磁头的扫描宽度的一半，鼓的高度方向的向下移动相当于第二磁头的扫描宽度的一半。 或者，第二磁头可以以预定量的偏移量设置，使得与磁带行进方向相反的所述第二磁头的端部位于预先记录的预定值的轨道内。