摘要:
A form-fill-seal machine (1) comprising means for moving a web of packaging material through the machine according to a process path and means for transforming the web (6) into filled bags (6b), furthermore comprising a zipper strip applicator (11) device for applying, in particular by pre-sealing, of a zipper strip onto the web, said zipper strip applicator device having means for supplying a zipper strip for each bag transverse to the process path, which supply means comprise at least one conveyor, which is provided with means for retaining or engaging the zipper strip during supply, wherein the zipper strip conveyor is provided with driving means, the machine further comprising control means having edge noticing means for noticing the position of a longitudinal edge of the web with respect to a fixed reference in the machine.
摘要:
A sheet material (2) for producing packages (17) of food products and having a succession of optically detectable register mark (18); each mark, has a first and a second segment (37a, 37b; 37d) parallel to each other and perpendicular to a feed direction of the material (2), and a sloping segment (37c; 37e) interposed between the parallel segments, so as to define a broken, to substantially Z-shaped line (37), which may be used to determine the position of the material both in the feed direction and in a perpendicular direction.
摘要:
The method for centring print on the wrapper (3) of packs of items (2) involves an initial calibration step in which correct centring of a first print in a first wrapper (3) containing a first pack of items (2) is predetermined. The corresponding reference data is acquired and saved in electronic control means (11). The method then involves a normal operating cycle in which the data relative to each wrapper (3) being formed is compared with the reference data to verify correct print centring and, if the print is incorrectly positioned relative to the data saved, suitable corrective action is activated, to be imparted, by the control means (11), to the operating parts of the machine which implements the method.
摘要:
There is described a forming unit (1) for producing sealed packages (2) from a tube (3) of sheet packaging material fed along a feed path (A) and filled with a pourable food product. The unit (1) has jaw means (6, 6') acting cyclically on the tube (3) to grip and seal it at equally spaced cross sections defining opposite sealing bands (15) of the packages (2); interacting means (23; 16) interacting with the tube (3) and fitted movably to the jaw means (6, 6'); and actuating means (27; 40) for operating the interacting means (23; 16) and mounted entirely on the jaw means (6, 6').
摘要:
The invention relates to a device for aligning a packing material tube (1) with a treatment station in a packaging machine in which a tube (1) with a circular cross-section is produced from a strip of printed packaging material having embossed lines. Said tube is closed by longitudinally sealing it, filled and shaped in a cross-sealing unit (12) and divided into cuboid packages. The cross-sealing unit (12) is provided with an adjustable lift of stroke so that it can intermittently convey the tube (1). It is also provided on diametrical sides with a folding flap (16) that can be pivoted about an axis (15). For feeling the position mark, a sensor is arranged. The aim of the invention is to facilitate a faster termination of the initial phase when the packaging machine is put into operation while at the same time producing less cuttings and to prevent the paper tube from being damaged. To this end, a folding finger (19) is arranged upstream of every folding flap (16). Said folding finger folds the tube (1) to a width that is approximately equal to the finished package in such a manner that the tube (1) is located outside the folding flaps (16).