Patent ID: 6688082
Filing Date: 2004-02-10
Classification: B65B,B65H

Abstract:
A method for stopping and restarting an automatic machine (1) for wrapping products (2), in particular rolls of toilet or kitchen paper, in a collective pack using a wrapping film (4a; 4b) unwound from a reel (31a; 31b), the method comprising the following automatic sequence of steps, triggered by the activation of a control for stopping the machine (1):reducing speed of the machine (1) to a speed (V2) suitably lower than the working speed (V1); stopping infeed of the products (2) to the machine (1); stopping infeed of a first wrapping film (4a) to the machine (1) with a delay of at least four steps after stopping the infeed of the products (2); stopping the machine (1) after the products (2) inside the machine (1) have moved at least three steps forward; the method further comprising the steps of: substituting the second first reel (31a) of the first wrapping film (4a) with a second reel (31b) of a second film (4b); loading the film (4b) of the second reel (31b) into the related film feed means (33, 34); restarting the machine (1) and thereby automatically activating a sequence of steps including: restarting the second wrappng film (4b) unwinding from the second reel (31b); positionally centering the wrapping film (4b); restarting the machine (1) at a reduced speed (V2), lower than the working speed (V1); restarting the product (2) infeed; restarting infeed of sheets (18) of the second wrapping film to the machine with a delay of at least four steps after restarting the product (2) infeed.