Control device interface especially for vending machines and displays

Interface (10) according to one of the preceding claims, wherein each of said tracks follows a predefined trajectory wherein the trajectories of said tracks are preferably parallel.

Interface (10) according to one of the preceding claims, wherein said interface has a main direction of development of said trajectories, which is rectilinear or curvilinear, and a transverse direction which is substantially perpendicular to said main direction of development;

• wherein, along said transverse direction, each of said tracks and said free portions have a thickness extension;
• the thickness extensions of said tracks being all substantially the same and the thickness extensions of said free portions being all substantially the same.

Interface (10) according to any one of the preceding claims, wherein said masking layer (16) comprises or consists of a solvent-based ink layer.

Interface (10) according to the preceding claim, wherein said ink is deposited by silkscreen printing or offset printing on one of the further layers of said plurality of layers.

Interface (10) according to the preceding claim, wherein said ink is deposited on said protective layer (15), which may be made of polycarbonate.

Interface (10) according to one of the preceding claims, wherein said masking layer (16) comprises, in sequence, towards said rear face (12):

• a chromatic masking layer (161) designed to include differently coloured portions;
• a diffuser masking layer (162).

Interface (10) according to one of the preceding claims, wherein said diffuser layer (22) consists of a glossy ink having a gloss of between 70 Gloss Units and 90 Gloss Units, at 60°.

Interface (10) according to one of the preceding claims, wherein said diffuser layer (22) covers said masking layer (16), towards said rear face (12).

Interface (10) according to one of the preceding claims, wherein said tactile assembly (14) comprises an electrically insulating coating layer (24) which coats, towards said front face (11), said operative layer (17) except for said connection contacts (20);

• said coating layer (24) which may be made of dielectric material and may have a dielectric strength of at least 500 V-AC for a thickness of 30 μm, or of at least 2400 V-AC for a thickness of 25 μm, determined according to the ASTM D149-81 Method A.

Interface (10) according to one of the preceding claims, wherein said tactile assembly (14) comprises covering elements (25), comprising graphite optionally included in a matrix of polymeric material which may be a thermoplastic resin;

• said covering elements (25) cover said connection contacts (20) left uncovered by said coating layer (24) and complement the latter.

Interface (10) according to one of the preceding claims, wherein said matrix layer (21) is electrically insulating, may be made of dielectric material and may have a dielectric strength of at least 2400 V-AC for a thickness of 25 μm, determined according to the ASTM D149-81 Method A.

Interface (10) according to one of the preceding claims, wherein the electronic tracks (18) of said operative layer (17) consist of a silver based conductive ink with silver powder finely dispersed in a matrix which may be made of thermoplastic resin.

Interface (10) according to one of the preceding claims, wherein said protective layer (15) comprises or consists of a layer of polymethyl methacrylate or polycarbonate which is transparent;

• said protective layer (15) has a transparency of not less than 80%, as defined in the DIN EN ISO 13468-3 test, and preferably has a thickness of between 0.75 mm and 15 mm and preferably equal to 1 mm.

Interface (10) according to one of the preceding claims, comprising a light-limiting layer (27) having shapes corresponding to the shaped portions (23) of the matrix layer and associated with the matrix layer (21) on one side facing the rear face (12) and designed to limit the passage of light that passes through it, directed towards said front face (11) and/or to strengthen a masking capacity of said matrix layer (21).

Interface (10) according to one of the preceding claims, wherein said matrix layer (21) consists, except in said shaped portions (23), of an opaque ink having a lightfastness of between 7 and 8 according to the blue wool scale defined by the DIN 16525 standard.

Interface (10) according to one of the preceding claims, wherein the distribution of said tracks (18) is substantially homogeneous and/or wherein said tracks (18) have a shape independent of the shape of said shaped portions (23) of said matrix layer (21) and/or wherein said operative layer (17) is independent of said matrix layer (21).

Kit including an interface (10) according to one of the preceding claims and an assortment of matrices (21) which are different from each other.