摘要:
A sheet material for producing packages of food products and having a succession of optically detectable register mark; each mark, has a first and a second segment parallel to each other and perpendicular to a feed direction of the material, and a sloping segment interposed between the parallel segments, so as to define a broken, to substantially Z-shaped line, which may be used to determine the position of the material both in the feed direction and in a perpendicular direction.
摘要:
There is described a packaging machine (1) for producing sealed packages (2) of a pourable food product from a strip (6) of heat-seal sheet packaging material. The packaging material (1) has a number of photocells (14), which are programmable externally as regards their setting parameters, are positioned facing the strip (6) of packaging material to detect optically detectable elements on the strip, and have setting means (26, 210, 300). The packaging machine (1) also has a control unit (16) connected to the photocells (14) and having enabling means (24) for enabling the setting means of a specific photocell (14), data downloading means (26, 240, 310) for downloading off the specific photocell (14) the setting parameters of the photocell, and data uploading means (26, 260, 330) for uploading onto the other photocells (14) setting parameters calculated as a function of the setting parameters downloaded off the specific photocell (14).