Automatic labeling machine, for containers in the form of mesh bags or the like

An automatic labeling machine for containers in the form of bags of mesh or the like, of the type which comprises a bobbin joined to a frame and fed with a continuous strip of labels, in particular labels joined by very narrow appendices, guide means for guiding said strip, cutting means for separating labels from the strip, a regulation and control device, actuation means having an anti-slip surface roller for moving the strip traverse to the guide means of the strip of labels and in which is supported said strip to be dragged toward a discharge end of the machine, said roller revolving in response to power means and through corresponding transmission means, making available a printer mechanism, preferably printing heat-selectively at predetermined and programmable points, which is applied against a corresponding surface, preferably a heat-sensitive surface, of the strip of labels by elastic means and in the zone in which the opposite surface of said strip is supported above the aforementioned revolving roller, to which the printer mechanism is articulated along a longitudinal axis mounted in a transverse axis joined to the frame, and

• means for separating the printer mechanism from the strip;
• characterized in that said labeling machine includes
• a carriage displaceable back and forth by an actuation device along a support plate projecting downward and fixed to the frame, the support plate holding guide means for guiding the displacement of the label of the strip and a central, longitudinal channel, with a shaped transverse profile, preferably staggered toward an interior, which extends forming an appendix facing downward and also provided with said shaped profile;
• an axis passing through both sides of the carriage, to which are affixed connecting rods on each side, swivelling and contiguous, with respect to one another and on the outside, on each one of said sides, one end of the axis projecting out with respect to one of such connecting rods thus forming a stud, said stud being provided with a bushing fixed to the same, while the other end of the axis projects out from the other connecting rod and is joined to a lever;
• a brace member securely joining free ends of the two connecting rods;
• a finger provided in the middle of the brace with at least one small catch which can come face-to-face with the shaped profile and be introduced into the same with intercalation of the corresponding part of the label, already cut from the strip, to be dragged toward the discharge from the machine;
• wherein the actuation means for the carriage are articulated to the brace in which is fixed the finger for presenting a retaining push rod, articulated to the frame and provided with a lateral groove into which is introduced the stud of the axis of revolution of the connecting rods, whereby when the carriage is in its position most proximate to the cutting means, and said push rod is being thrust against said stud by an elastic means, the retaining push rod presents its free end following a plane inclined to the inside, against which is slid the stud during part of the forward and return travel of the carriage;
• wherein the connecting rod provided with the aforementioned stud also has a bumper situated in a forward position with respect to the stud wherein, when the carriage moves forward (toward the discharge from the machine), the bumper is displaced to the outside by the retaining push rod, freeing the stud from the groove of that member;
• and
• wherein during the forward movement of the carriage, the lever of the axis of revolution of the connecting rods actuates the cutting means for the separation of the corresponding terminal label from the strip of labels across corresponding transmission means.