Patent claim: Machine for performing incision and breaking operations on glass plates L in particular laminated glass plates comprising two overlapped glass layers with a film of synthetic material interposed between them said machine comprisinga fixed work bench 1 defining a supporting plane 2 intended to receive the plate L to be processeda fixed cutting bridge 3 equipped with an upper carriage 4 and a lower carriage 5 movable along the cutting bridge 3 in a direction Y parallel to the longitudinal direction of the cutting bridge 3said upper carriage 4 and said lower carriage 5 carrying an upper incision tool 6 and a lower incision tool 7 respectively for the incision of the upper and lower layers of the glass plate Lsaid cutting bridge 3 being provided with actuating means for the movement of said upper 4 and lower 5 carriages along the Y directionmeans for moving 8 9 10 said plate L on the fixed bench 1 in a horizontal direction X perpendicular to the aforesaid direction Y andmeans for the electronic control PC of said actuating means for the movement of said upper 4 and lower 5 carriages along the Y direction and said means for moving 8 9 10 the plate in the X directionboth the upper incision tool 6 and the lower incision tool 7 being rotatably mounted about an axis Z1 perpendicular to the X direction and the Y directionthe electronic control means PC being further programmed to control during the incision operation of the glass plate L a movement in the X direction of the plate L and a movement in the Y direction of said carriages 4 5 these movements being coordinated in such a way as to obtain an incision according to a predetermined path T S Q in the plane of the plate L with rectilinear andor curved lines and without the need to impart a rotation to the platesaid upper and lower incision tools 6 7 being always orientated during the incision operation according to the tangent of the incision path at the point of the path in which they are located said machine being characterized in that it further comprises at least one breaking tool 18 20a 21a 32a 33a for breaking at least one glass layer of theplate said breaking tool 18 20a 21a 32a 33a being carried by one of said upper 4 and lower 5 carriages and in that the aforesaid electronic control means PC are further programmed to control during a breaking operation of the glass plate L subsequent to an incision operation a movement in the X direction of the plate L and a movement in the Y direction of said at least one carriage 4 5 carrying said at least one breaking tool 18 20a 21a 32a 33a these movements being coordinated in such a way as to achieve breaking of said at least one layer of the plate according to the said predetermined path T S Q in the plane of the plate L with rectilinear andor curved lines and without the need to impart a rotation to the plate L.

Related passage: Automatic cutting of multilayered glass sheets is obtained with machines of the type illustrated in Figure 2 comprising a bench 1 defining a resting surface 2 for the glass sheets L and a fixed bridge 6.Cutting of the multilayered glass sheet L is obtained with a first step of scoring of the top and bottom sheets a step of breaking of each of said top and bottom sheets into two separate portions a step of softening of the plastic film and a step of detachment or of tearing of the plastic film to obtain a total separation of the two portions of the multilayered glass sheet.On account of the relative complexity of said operations the bridge 6 is fixed with respect to the work bench in so far as it has a very complex and heavy structure.An example of embodiment of the devices prearranged on the fixed bridge 6 may be seen in the annexed Figure 3 which also regards the prior art.The fixed bridge 6 comprises wheel scribing tools 7 and 8 set respectively beneath and above the working surface 2 carried respectively by two slides 9 and 10 that slide in the direction Y on the bridge 6.The bridge 6 further comprises means for breaking the top sheet and the bottom sheet included between which is for example a breaking wheel of the type designated by 11 in Figure 3.Likewise provided are means for heating the plastic film not illustrated that intervene following upon the breaking operation.