Patent · US Expired

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

US4717091A · kind A · utility

17Cited by

5References

9Claims

0Family size

Assignee

BASF SE

Inventors

Klaus Schoettle · Heidelberg, DE
Paul Deigner · Bad Dürkheim, DE
Herbert Dietze · Berghaupten, DE
Volker Frank · Heidelberg, DE
Oswald Waidele · Ettenheim, DE

Key dates

Filing date	Dec 10, 1984
Grant date	Jan 5, 1988
Priority date	—
Expiry date	Dec 10, 2004

Classification

Technology area (CPC G)Physics
CPC primaryG11B23/08721
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.