concerns a packaging fabric source device of coil master

The present creation refers to a packaging substance source device, a packaging machine with two dispensers.

This gadget consists of two servomotors exercise routine4 and 34, reels 1, 31, a travel system 24, 25 in the coil master packaging materials in strip kind, two programming devices 54, 55 and 56 for finding, 57, which finds a signal related to the instant size in the reel of packaging material utilized and supply a transmission for managing the drive speed from the reels. In addition, it comport presses 17, 21 for quickly assembling the end from the strip of coil master packaging the coil operational at the start of the strip coming from the following reel fabric.

Dispostif supply of packaging material, of a packaging machine, comprising two reels each carrying a coil of packing material in strip form, these reels being alternately placed in service to ensure continuous machine approvisionnemnt, characterized in that it comprises two drive actuators for driving independently the two reels, a drive device of the packaging material, two coding devices and detection, for providing a control signal controlling the speed drive reels, according to the driving speed of the packaging material and the instantaneous diameter of the reel in use, two tape end sensor and a device for automatically assembling the end of the strip of material amballage in use of the coil to the beginning of the strip coming from the following reel, this device comprising a press for applying the two ends of the strips one on the other and a control device of the press, arranged to receive a signal detecting end of tape by one of the two detectors tape end and for controlling said press, after a delay depending on the driving speed of the packaging material.

2. According to coil master packing machine, characterized in that the two coding devices each comprise detection and an arm pivoting about a fixed axis whose position of equilibrium is determined at each instunt by the tension exerted by the material of packaging and the return force exerted by a spring, the said position of equilibrium is a function of the instantaneous diameter of the reel of wrapping material in use, an arcuate segment with a coding, fixed to one end of each of these arm and a detector arranged to detect said encoding and transmitting a signal for correcting the drive speed of the reel corresponding to the diameter of the reel carried by the reel, device.

3. According to coil master packing machine, characterized in that the device for automatically assembling two strips of packaging material from two coils successively entering service, comprises an electromagnet, arranged to act on a press, said press comprising a movable roller mounted on a pivoting support and a fixed roller, the ends of the strips to be assembled being momentarily pressed between the rollers, device.

4. Device according to coil master packing machine, characterized in this it comprises two drive rollers of the packaging material and a pulse generator rotating in synchronism with the rollers, mentioned pulse generator becoming arranged to provide a indicate called setpoint speed at which the drive of the drive reel momentarily in use.

5. According to claims 4 and 2, characterized in that it comprises a digital multiplier to correct the speed as a function of the correction signal transmitted by the detector coding, device.

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