Abstract: A reusable seal applicable to a slender portion of a commercial article, comprising a first plate and a second plate which are arranged side by side and are joined at corresponding edges by at least one elastically deformable hinge body. The first and second plates are provided monolithically, on the respective edges arranged opposite the at least one hinge body, respectively with a first wing and a second wing, which can be mutually coupled, by way of reversible engagement elements, in order to accommodate and lock the slender article portion between the first and second plates.

Abstract: An anti-theft device for items having portions that can be surrounded by straps, comprising a strap, a container that contains an excitable signaling component and an engagement element in which one end of the strap can be inserted and locked, the strap incorporating at least partially a metallic insert.

Abstract: A seal with anti-theft device for items having rod-like portions, particularly for eyeglasses. The seal comprises a hollow body which contains an electronic signal-emitting component and forms a plane of arrangement for a rod-like portion. Two parallel and mutually opposite guides protrude from the body and each guide has at least one sawtooth engagement surface for the nonreversible sliding, in a direction which is perpendicular to the plane of arrangement, of a slider which has complementary sawtooth engagement surfaces. The rod-like portion is retained between the plane of arrangement and a parallel plane of arrangement formed by the slider.

Abstract: An anti-theft container, comprising two half-box-like components wherebetween the item to be protected is enclosed. A first one of the components has an enclosure containing an excitable signaling component and an engagement means in which one end of a tab which protrudes from a second one of the components is insertable and lockable.

Abstract: An anti-theft device for objects provided with portions which can be surrounded by straps or the like. The anti-theft device comprises a strap, an enclosure which contains an excitable signaling component and an engagement elements in which it is possible to insert and lock a first end of the strap, the engagement means being rigidly coupled to, and adjacent to, the enclosure together with a coupling element for the mating of a second end of the strap, which is closed like a noose onto the element to be protected against theft.

Abstract: A seal with anti-theft device for items having rod-like portions, particularly eyeglasses, comprising a hollow body suitable to contain an electronic signaling component and defining a contact surface for a rod-like portion. Two parallel and mutually opposite guides protrude from the body, each guide having at least one saw-tooth engagement surface for the irreversible sliding, at right angles to the contact surface, of a slider which has complementary saw-tooth engagement surfaces. The rod-like portion is retained between the contact surface and a parallel contact surface defined by the slider. The seal is provided with an annular gasket, in which the rod-like portion is to be inserted, which is arranged between the saw-tooth engagement surfaces of the slider and is rigidly coupled thereto by being monolithically provided with an annular tab which surrounds a portion thereof.

Abstract: An anti-theft seal for commercial articles having rod-like portions such as spectacles includes a box-like body for containing an electronic indication component. The body has a tab which is constituted by three consecutive elements which are articulated by reducing their cross section so that they can fold back onto the body and define a containment seat for a rod-like element to be secured. A slider engages, in a non-reversible manner, a guide which is rigidly associated with the box-like body; the slider has a mushroom-shaped head which is suitable for inserting, by translatory motion, in a seat of the tab so as to lock it in folded position.