Basf Aktiengesellschaft

Volker Frank

Klaus Schoettle

Herbert Dietze

Paul Deigner

Juergen Dreyer

Eugen Kamm

Peter Wieme

Oswald Waidele

A transparent window member for a tape cassette, which together with a reel pressure spring, forms a subassembly of the cassette. The reel pressure spring has a U-shaped central portion, the bight of the U being parallel to the plane of the spring arms, and the reel pressure spring having a longitudinal edge with two transverse slits spaced the same as the legs of the U of the central portion of the pressure spring. The central portion may thus be transversely inserted in the longitudinal edge of the window member and it thus forms a locating element for the pressure spring.

Tape cassette, in particular a video tape cassette, and a pressure

A plate spring for tape cassettes advantageously consists of two long and two short spring arms whose shapes and dimensions are optimized to achieve minimum wastage of material during punching from a sheet-metal strip. The length of the fastening arms is preferably about the same as the width of the ends of the long spring arms or less or at most 1.5 times the width. The spring can be used for all types of tape cassettes, regardless of whether they contain magnetic tape, film or other recording media. A tape cassette possesses a plate spring which has this form and is fastened by welding.

Plate spring for a tape cassette

Growing community of inventors

Heidelberg, Germany

Volker Frank