| 摘要 |
A combined blousing, stripping and sealing operation is disclosed for providing increased speed and efficiency to a form, fill and seal packaging system. An AC/DC brushless servomotor (6O, 5O) is utilized for driving the stripping/sealing carriage (12), as well as operating the sealing jaws (3O, 32) to form the bags (B) from a continuous film tube (T). Each servomotor (6O, 5O) drives a crank (62, 36) that is coupled for oscillating movement in response to a programmable index controller (58). Drive linkage (63) connects the crank to the carriage/sealing jaws. The blousing function is provided by a pair of plates (54, 55) on the top of the sealing jaws. On the return movement of the carriage (12), the plates (54, 55) contact the bottom of the bag next in line to bulge the sides for receipt of the product. The programmable index controller (58) provides a signal to the carriage/sealing jaws in dependence on an external signal indicative of the selected bag size being packaged. |
