Cassette reel spring having rolled edges
AssigneeKoller Manufacturing Corporation
InventorWilliam M. Carroll
Life of this patent
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Abstract
A reel spring for a magnetic tape cassette is formed from a thin, elongated strip of stainless steel. The side edges of the strip are folded over by stamping or rolling to form longitudinal stiffeners. The stiffeners effectively increase the thickness of the strip at the edges, allowing the use of less expensive raw material without sacrificing functionality.
Claims14
A reel spring for a magnetic tape cassette comprising an elongated strip of resilient material having first and second side edges extending substantially throughout its length, and at least one longitudinal stiffener of resilient material attached to the strip, the stiffener having a width less than that of the strip and being in contact substantially throughout its width with the strip to provide at least two layers of resilient material at the point of its attachment.
A reel spring for a magnetic tape cassette comprising an elongated strip of resilient material having first and second side edges extending substantially throughout its length, and at least one longitudinal stiffener attached to the strip, the stiffener effectively increasing the thickness of the strip at the point of its attachment, and wherein the strip further includes a flat, central base portion, a first pair of transverse crimps at the ends of the base portion defining transition sections of the strip extending at a first angle to the plane of the base portion, and a second pair of transverse crimps at the outer ends of the transition sections defining outer portions of the strip extending at a second angle to the plane of the base portion.
Dependencies are inferred from the claim text.