作者: Dave Eide , Kurt Rozek
DOI:
关键词: Radius of curvature (optics) 、 Geology 、 Compact disc 、 Optics 、 Aperture (computer memory) 、 Flange 、 Base (geometry) 、 Retainer
摘要: A protective retainer for a planar disc having an outer peripheral edge, information containing area, and central portion defining aperture. The includes first cover surface second surface. also has layer. retaining device flange that is interdisposed between retained by the layers in order to prevent from inadvertently becoming detached after repeated use. outwardly projecting button adapted be engageable aperture of so as maintain relative position resiliently deformably detachable when pressure exerted on device. pair opposing upright curved walls, each base rim. rims have radius curvature greater than its respective define chords. Each chords together periphery opposed shoulders. channel interconnecting exerts directed walls engaged position, while being deformable permit engage detach disc.