Abstract: A device for cutting a plate of a pre-determined thickness, preferably a glass plate, includes a frame; a support device for a cutting utensil, which is connected to the frame and adapted to have and upward and downward movement; and a hinged lever system, which has a feeler element and is kinematically coupable with the support device to bind it in a pre-determined initial position with respect to the frame. When the feeler element is pressed against a surface, the hinged lever system causes the support device with the cutting utensil to move downward from an initial position.

Abstract: The present invention concerns a device (1) for cutting a plate (70) of a pre-determined thickness, preferably a glass plate. The device foresees: —A frame (10, 31); —A support device (12, 20) for a cutting utensil connected to the frame. In accordance with the invention, the support device (12, 20) is mobile according to an extraction/retraction motion with respect to the frame (10). Further, a hinged lever system (32, 33, 34) is further foreseen, having a feeler element (50), said hinged lever system being kinematically coupable with said support device (12, 20) in such a way as to bind it in a pre-determined initial position with respect to the frame and so that, when said feeler element is pressed against a surface (70), an operation of the hinged lever system is determined which conducts the support device, starting from said initial position, to an extraction motion.

Abstract: The present invention refers to a grooving device comprising grooving means for realizing a grooving line on a sheet, said grooving means comprising: —A first and a second blade-holder support arranged one opposite the other in such a way as to allow the application of a first and of a second blade, one facing the other according to a pre-determined penetration angle (tt) in the sheet, said first and said second blade-holder support being eliding in such a way as to allow a lowering/lifting of the blades that can be applied on them; —An operating device for controlling the sliding of said first and second blade-holder support, said operating device comprising a piston that alides in the grooving device and a pair of fixing pins, each one fixed on one part to a respective blade-holder support. In accordance with the invention, on the opposite part, said pins are maintained in contact in a sliding manner along a surface of the piston.

Abstract: A system is disclosed for the rapid change of heads in operating machines, such as equipment for the cut and/or decoration of passe-partout, or of items made of cardboard, glass, ceramic or the like. A system according to the present invention couples the head of the machine with a machine arm through a connecting element that contains one or more magnets. Said magnets retain the head connected to the connecting device by attraction, but also allow the head to be easily removed with just one hand.

Abstract: A system is disclosed for the rapid change of heads in operating machines, such as equipment for the cut and/or decoration of passe-partout, or of items made of cardboard, glass, ceramic or the like. A system according to the present invention couples the head of the machine with a machine arm through a connecting element that contains one or more magnets. Said magnets retain the head connected to the connecting device by attraction, but also allow the head to be easily removed with just one hand.