Patent ID: 7431234
Filing Date: 2008-10-07
Classification: B65B

Abstract:
1. Automatic reel unwinding apparatus in a machine for packaging products comprising a bearer structure ( 14 , 15 ) carrying a pair of rotating arms ( 16 ), centrally hinged to the bearer structure ( 15 ) through a rotation shaft ( 17 ) and carrying at each ends, on two shafts ( 18 , 18 ′) that are adapted to be removed from said arms ( 16 ), and having at least a pair of reels ( 12 , 12 ′), said rotation shaft ( 17 ) being commanded through a speed reducer ( 20 ) and each of said two shafts ( 18 , 18 ′) being commanded by a speed reducer ( 21 ) through a respective transmission ( 22 ) able to be selectively engaged with the speed reducer, a U-shaped support bracket ( 24 ) which is connected to a piston ( 30 ), said U-shaped bracket further characterized as having two ends, one end being supported by central shaft ( 17 ) so as to allow an opposed end to pivot around said central shaft ( 17 ) by action of a cylinder ( 30 ), said U-shaped bracket having at least two idle rollers ( 25 , 26 ) attached to said U-shaped bracket ( 24 ) fore storage of a film ( 13 ), the U-shaped bracket and idle rollers ( 25 , 26 ) being adapted to allow for said film ( 13 ) to unwind from a first reel ( 12 ) and through a fastening and cutting means ( 27 ) so as to fasten an end portion ( 28 ) of film of the first reel ( 12 ) to an initial portion ( 29 ) of film of a second new reel ( 12 ′), said removable shafts ( 18 , 18 ′) being fixed to at least one openable support ( 19 , 19 ′) arranged at an end of said arms ( 16 ).