公开(公告)号：US5321566A

公开(公告)日：1994-06-14

申请号：US882728

申请日：1992-05-14

申请人： Frederic F. Grant ,  Garry Hierman

发明人： Frederic F. Grant ,  Garry Hierman

IPC分类号： G11B15/60 ,  G11B15/61 ,  G11B15/665 ,  G11B5/027 ,  G11B15/00

CPC分类号： G11B15/61 ,  G11B15/6656

摘要： A magnetic tape cassette helical scan magnetic tape recorder has a magnetic tape threading and transport apparatus including multi-surface, multi-radius air bearing blocks for transporting magnetic tape in a helical path around a tilted rotary head scanner. Vacuum walls located on either side of the rotary head scanner assist in threading the magnetic tape from a magnetic tape cassette around the rotary head scanner. The air bearing blocks are moved into position contiguous to the rotary head scanner after the vacuum threading operation is completed. The vacuum walls have longitudinal slots which are substantially coextensive with the extent of the air bearing blocks. A vacuum sensor is positioned at the end of the slots away from the rotary head scanner so that the sensor is only actuated when the tape is against the whole length of the wall. This prevents damage to the tape when the air bearing blocks are moved behind the threaded tape.

摘要翻译： 磁带盒螺旋扫描磁带录像机具有磁带穿线传送装置，其包括多面多圆形空气轴承座，用于在围绕倾斜旋转头扫描器的螺旋路径中传送磁带。 位于旋转磁头扫描器两侧的真空壁有助于将磁带从旋转磁头扫描器周围的磁带插入。 在完成真空穿线操作之后，空气轴承块移动到与旋转头扫描仪相邻的位置。 真空壁具有与空气轴承块的程度基本上共同延伸的纵向槽。 真空传感器定位在远离旋转头扫描器的槽的端部处，使得传感器仅在带子抵靠壁的整个长度时被致动。 这样可以防止当空气轴承块移动到螺纹带后面时损坏磁带。