Back to results
US 4,466,540 AGranted
Merchandizing package
AssigneePlastiques Industriels Thecla
InventorsRobert Lotrous, Paul Darbois
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneePlastiques Industriels Thecla
InventorsRobert Lotrous, Paul Darbois
Estimating the term…
A package comprises a cover closing an article housing formed in a baseplate. A contiguous compartment closed by a plate contains a spring assembly comprising two arc members joined at their ends and bearing on abutment members. A profiled rod inserted through a complementarily profiled opening pushes on thrust member against the abutment of the ends of the spring assembly on the abutment members so as to bring about, by symmetrical reaction, retraction of the bar supporting the bolt members. However, if a fly-weight has not previously been retracted by a magnetic field a projection engages in a groove in the fly-weight to lock the lock. The consecutive action of the magnetic field and the pressure on thrust member are applied by a key device retained at the checkout of the self-service store. The invention has one particular application in the merchandizing of prerecorded magnetic tape cassettes.
A re-usable theft-resistant package suitable for self-service merchandizing of goods, comprising a cover, a lock adapted to be operated mechanically and electromagnetically and to retain said cover, a bolt member incorporated in said lock, a profiled opening in said package adapted to admit a complementarily profiled rod adapted to push back said bolt member and forming part of a corresponding key device, a fly-weight of ferromagnetic material disposed to resist selectively pushing back of said bolt member and adapted to permit pushing back of said bolt member by retracting in response to a magnetic field and a return spring adapted to resist retraction of said fly-weight, the arrangement being such that said fly-weight is retracted by a magnetic field produced by said key device to permit pushing back of said bolt member so as to unlock the package.
Dependencies are inferred from the claim text.