Magnetic tape spool

Claim 2

An endless magnetic tape cassette spool comprising a circular base, an inner sleeve mounted on and coaxial with saId base, a plurality of resilient fingers projecting upwardly from said base and peripherally spaced about the axis of said base inwardly of the peripheral edge thereof and being outwardly concave, and a resilient collar extending between and joined to the upper inner faces of said fingers.

Claim 3

The cassette spool of claim 1 wherein each of said fingers includes an inwardly upwardly inclined lower section and an outwardly upwardly inclined upper section joining said lower section and terminating in an upwardly directed leg.

Claim 4

The cassette spool of claim 1 wherein the outer faces of said fingers are curved convex surfaces.

Claim 5

The cassette spool of claim 1 wherein said base comprises an outer ring section and angularly spaced spokes extending radially inwardly from said outer ring section, said fingers being mounted on said spokes.

Claim 6

The cassette spool of claim 1 wherein said base comprises an outer ring section and angularly spaced spokes extending radially inwardly from said outer ring section, said fingers being mounted on said spokes and each of said fingers including an inwardly upwardly inclined lower section and an outwardly upwardly inclined upper section joining said lower section and terminating in an upwardly directed leg.

Claim 7

An endless magnetic tape cassette spool comprising a circular base having an outer ring section and angularly spaced spokes extending radially inwardly from said outer ring section, an inner sleeve mounted on and coaxial with said base, and a plurality of resilient fingers projecting upwardly from said base and peripherally spaced about the axis of said base inwardly of the peripheral edge thereof and being outwardly concave, said fingers being mounted on said spokes, each of said fingers including an inwardly upwardly inclined lower section and an outwardly upwardly inclined upper section joining said lower section and terminating in an upwardly directed leg, said sleeve being located above the plane of said base, and alternate of said spokes terminating at their inner ends in upwardly directed legs joining the outer face of said sleeve and the other spokes terminating at respective fingers.

Claim 8

An endless magnetic tape cassette spool comprising a circular base having an outer ring section and angularly spaced spokes extending radially inwardly from said outer ring section, an inner sleeve mounted on and coaxial with said base, and a plurality of resilient fingers projecting upwardly from said base and peripherally spaced about the axis of said base inwardly of the peripheral edge thereof and being outwardly concave, said fingers being mounted on said spokes, each of said fingers including an inwardly upwardly inclined lower section and an outwardly upwardly inclined upper section joining said lower section and terminating in an upwardly directed leg, said sleeve being located above the plane of said base, and alternate of said spokes terminating at their inner ends in upwardly directed legs joining the outer face of said sleeve and the other spokes terminating at respective fingers.

Claim 9

The cassette spool of claim 6 wherein the upper face of said base outer ring and the outer faces of said fingers are convex.

Claim 10

The cassette spool of claim 6 formed as an integral unit of a synthetic organic polymeric resin.

Claim 11

A one piece plastic spool for supporting a coil of endless magnetic tape for use in a magnetic tape cartridge comprising a circular base having an outer ring section and a first and second sets of angularly spaced spokes extending radially inwardly from said outer ring section, said ring and spokes supporting the lower edges of said tape coil, said first set of spokes terminating at their inner ends in upwardly directed vertical legs defining an inner sleeve disposed above and coaxial to said base, said second set of spokes interdigitating the first set of spokes and terminating at their inner ends at points between said ring and the inner sleeve, a plurality of resilient fingers projecting upwardly from the inner ends of the second set of spokes and defining a hub coaxial with said inner sleeve, the upper faces of said spokes being convex shaped, said fingers including an inwardly and upwardly inclined lower section and an outwardly upwardly inclined upper section joining said lower section and terminating in an upwardly directed leg.

Claim 12

A one piece plastic spool for supporting a coil of endless magnetic tape for use in a magnetic tape cartridge comprising a circular base having an outer ring section and a first and second sets of angularly spaced spokes extending radially inwardly from said outer ring section, said ring and spokes supporting the lower edges of said tape coil, said first set of spokes terminating at their inner ends in upwardly directed vertical legs defining an inner sleeve disposed above and coaxial to said base, said second set of spokes interdigitating the first set of spokes and terminating at their inner ends at points between said ring and the inner sleeve, a plurality of resilient fingers projecting upwardly from the inner ends of the second set of spokes and defining a hub coaxial with said inner sleeve, the upper faces of said spokes being convex shaped, said fingers including an inwardly and upwardly inclined lower section and an outwardly upwardly inclined upper section joining said lower section and terminating in an upwardly directed leg.

Claim 13

A spool in accordance with claim 9 in which fingers project upwardly from said first set of spokes and are within the loci of the hub.