| 摘要 |
<p>A packaging unit (1) for continuously producing aseptic sealed packages (2), containing a pourable food product, from a tube (14) of packaging material filled with the food product; the unit (1) has a first and second chain conveyor (10,11) respectively having a number of first and second jaws (12,13) which interact with and grip the tube (14) at respective equally spaced cross sections (88) to perform, at the cross sections (88), respective sealing operations on the tube (14); and the unit (1) also has a monitoring device (91) for monitoring the sealing operations, and in turn having at least one fixed sensor (92;93) cooperating with each second jaw (13) to generate at least one monitoring signal (S1,S2;S3,S4) related to an operating value (Vo) of a quantity associated with the second jaw (13), for example temperature or/and position of said jaw, and a comparing circuit (99) for comparing the operating value (Vo) with at least one predetermined reference value (Vf) of the aforementioned quantity, and for generating a fault signal (S5) indicating malfunctioning of the monitored second jaw (13) in the event of a predetermined relationship between the operating value (Vo) and the reference value (Vf). <IMAGE></p> |
