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21. 发明授权

US5323286A Method of determining tape length and tape pack position of a tape cassette 失效
标题翻译：确定磁带盒的磁带长度和磁带包位置的方法
公开(公告)号：US5323286A
公开(公告)日：1994-06-21
申请号：US999347
申请日：1992-12-31
申请人： Ivan Faul
发明人： Ivan Faul
IPC分类号： G11B27/13 , G11B15/02
CPC分类号： G11B27/13
摘要： A method of determining the position of a tape in a tape cartridge having a first hub, a second hub, a means for measuring the rotation of the first hub, a means for measuring the rotation of the second hub, and a length of tape with one end of the tape wrapped around the first hub and the other tape end wrapped around the second hub, the tape having a relatively uniform and predetermined thickness and the hubs having predetermined diameters. In accordance with the method, the first hub is locked to prevent rotation of the first hub. A length of tape is then extracted from the cartridge, which causes the second hub to rotate as tape is unwound from the second hub. There is then determined the angle rotated by the second hub in response to the length of tape being unwound from the second hub. The first hub is unlocked and the second hub is locked. The length of tape unwound from the second hub is wound onto the first hub, and there is determined the angle rotated by the first hub in response to the length of tape being wound onto the first hub. Finally, the position of the tape in the tape cartridge is calculated based on the predetermined thickness of the tape, the predetermined diameters of the empty hubs, and the angle of rotations determined for the second hub and for the first hub.
摘要翻译：一种确定带盒中带的位置的方法，所述带盒具有第一轮毂，第二轮毂，用于测量第一轮毂的旋转的装置，用于测量第二轮毂的旋转的装置以及具有所述带的一端缠绕在第一轮毂周围，另一带缠绕在第二轮毂上，带具有相对均匀且预定的厚度，轮毂具有预定的直径。根据该方法，第一轮毂被锁定以防止第一轮毂旋转。然后从盒中取出一段长度的胶带，当胶带从第二集线器展开时，导致第二轮毂旋转。然后响应于从第二轮毂解卷的长度来确定由第二轮毂旋转的角度。第一个集线器被解锁，第二个集线器被锁定。从第二轮毂解开的带的长度被卷绕到第一轮毂上，并且响应于缠绕在第一轮毂上的带的长度，确定由第一轮毂旋转的角度。最后，基于预定的带的厚度，空的轮毂的预定直径以及为第二轮毂和第一轮毂确定的转角来计算带子在带盒中的位置。

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