US 4,060,839 AGranted

Flexible information storage disc

AssigneeTexas Instruments Incorporated

InventorRobert Alan Meadows

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Abstract

A flexible information storage disc includes a central mounting portion and an outer body portion providing a surface area on which information may be recorded. The central mounting portion is provided with a least first and second apertures disposed radially outwardly with respect to the geometric center of the disc. The first and second apertures are respectively arcuately elongated in directions conforming to rotation of the disc about its geometric center. The leading end of the first aperture is defined by a pair of straight edges angularly intersecting at an apex and the leading end of the second aperture is defined by a single straight edge. The pair of intersecting straight edges of the central mounting portion bounding the leading end of the first aperture and the single straight edge of the central mounting portion bounding the leading end of the second aperture cooperate to provide three abutment edges arranged in respectively different planes normal to the disc for precisely locating the disc both radially and angularly.

Claims16

Dependent claims

A flexible information storage media comprising:

a sheet of flexible material including a central mounting portion extending radially outwardly from the approximate geometric center of said sheet,
and an outer body portion integral with the central mounting portion and concentric therewith, said outer body portion providing a surface area on which information may be recorded,
said central mounting portion being provided with at least first and second drive pin-receiving apertures disposed radially outwardly with respect to the approximate geometric center of said sheet and on opposite sides thereof,
said first and second apertures being respectively arcuately elongated in directions conforming to rotation of said sheet about its geometric center,
the leading end of said first arcuately elongated aperture being defined by a pair of straight edges angularly intersecting at an apex,
the leading end of said second arcuately elongated aperture being defined by a single straight edge,
the pair of intersecting straight edges of said central mounting portion bounding the leading end of said first aperture and the single straight edge of said central mounting portion bounding the leading end of said second aperture to provide three distinct drive pin abutment edges for a pair of drive pins with said edges being arranged in respectively different planes normal to the sheet.

4 more elements

A flexible information storage media comprising:

a circular sheet of flexible plastic material including a central mounting portion extending radially outwardly from the geometric center of said circular sheet,
and an outer body portion integral with the central mounting portion and concentric therewith, said outer body portion including a layer of magnetic flux responsive material providing a surface area on which magnetic information may be recorded,
said central mounting portion being provided with at least first and second drive pin receiving apertures disposed radially outwardly with respect to said geometric center of said circular sheet and on opposite sides thereof,
the leading end of said first aperture being defined by a pair of straight edges angularly intersecting at an apex,
the leading end of said second aperture being defined by a single straight edge,
the pair of intersecting straight edges of said central mounting portion bounding the leading end of said first aperture and the single straight edge of said central mounting portion bounding the leading end of said second aperture to provide three distinct drive pin abuttment edges for a pair of drive pins with said edges being arranged in respectively different planes normal to the circular sheet for precisely locating said sheet both radially and angularly.

3 more elements

Dependencies are inferred from the claim text.