A receiving reel for the band after stripping of the labels
A distribution plate placed close to two deviating bars for deviating the band so that the band forms a sharp angle in its path between the first deviating bar, the distribution plate and the second deviating bar, and a band pulling system placed after the second deviating bar
An arm on one end of which is fixed the first deviating bar, said arm being mounted for pivoting about a first pin
A lever carries a stop member and the first pin, and is mounted for pivoting about a second pin, fixed on the frame of the machine
Invention of Labelling Machines
Labelling machines are equipped, not only with means of unrolling the band which is wound on a supply reel, but also means of winding up the band from which the labels have been stripped after its passage over the distribution plate.
In addition, the sharp angle at the level of the distribution plate is formed by driving the band over at least two deviating bars placed close to plate and in such a way as to deviate the band from its path running from the supply reel towards the receiving reel.
Assembly is controlled in relation to the way in which the products to be labelled are presented, generally by means of a mechanical or opto-electronical sensor, provided at the level of the conveyor on which products are moved.
Such a machine is further equipped with extra accessories provided for slowing down the unrolling of the supply reel, for adjusting the tension of the band particularly when band reaches the part between the two deviating bars and the distributing plate so that the band remains stretched and that the labels can be stripped from their non-adhesive base in the best conditions, even if the progression of the band is jerky, such accessories consist in particular in multiple tension rollers for tensioning the band, or flexible bars which are applied against the band, etc.
Thus according to the invention, braking of the supply reel and tensioning of the band throughout its travelling path between the deviating bars and the distribution plate, are achieved due to two pivoting actions, firstly that of the piece on which is mounted the first deviating bar, and secondly that of the lever causing the application or release of the stop member blocking the rotation of the spindle of the supply reel.
Preferably, the supply reel rotating spindle is fast with a circular flange whose edge faces the stop member.
According to the particular disposition of the invention, it is possible to dissociate the supply reel braking function which is achieved by the stop member under the action of the return means associated to the pivoting piece, from the band tensioning function, which is achieved by the displacement of the first deviating bar under the action of the return means associated to the pivoting arm.