Abstract: A positioning system for floppy disc recording media utilizes a tapered positioner cone mounted on a gimballed structure at the free end of a pivotable support assembly. Straight line, non-tilted entry of the cone into the disc aperture is provided in combination with the gimbal mounting by positive guiding of the axis and attitude of the cone in the entry region. The mechanism for supporting the cone comprises a pivotted assembly incorporating a movable position control with an overtravel guide surface. Movement of a control element first causes pivotting of the assembly to lower the positioner cone relative to the floppy disc. Upon engagement, however, the guide surface and pivot relationship are such that further movement of the control element compresses the positioner cone under a spring force, utilized that the clamping force is controlled and the clamping action is stable until the control element is shifted to release the positioner cone from the floppy disc.

Abstract: A positioning and clamping system for floppy disc recording media utilizes a tapered positioner cone having extremely pliant petals. The cone defines a nominal circumference which is greater than the disc aperture, and the petals yield to conform to disc placement. Centering is accomplished before clamping by a radial return of the petals to balanced positions, acting against the unclamped disc. The geometry of the cone and follower are such that forces that would tend to distort the cone are minimized.