Patent Number: 6,308,497

Title: Apparatus for driving the folders in machines for packaging or wrappingproducts in a sheet of flexible material-

Abstract: The lower folders (P1, P2) of the packaging machine are driven by a rod andcrank system (1, 2) moved by an electric motor (5) with control of speedand phase, regulated by an electronic processor (7) with a correspondingprogramming and dialogue unit (8). The rod and crank system is designedand arranged in such a way that, when the folders are closed, the rod (1)is aligned with the crank (2), and this position (K) is taken to be thezero position by the said processor and is detected for this purpose by asensor (6). To drive the folders through a complete cycle of closing andopening, the motor (5) has to execute only one pulse, to transfer the rodand crank system from one to the other of two limit positions (K1, K2),spaced apart from the said zero position by an identical distance which isvariable, according to the format of the products to be packaged, by meansof the said programming unit (8). The rod and crank system is alsopreferably designed in such a way that, when the product has the maximumformat, the motor (5) executes intermittent rotations through 360.degree.,always in the same direction, with a cyclical stop in a position oppositeto the zero position (K).

Inventors: Cassoli; Paolo (Casalecchio Di Reno, IT), Gorrieri; Giordano (Pianoro, IT), Bonafe'; Giorgio (Casalecchio Di Reno, IT)

Assignee:

International Classification:

Expiration Date: 10/32013