Table for feeding a plastic film for a bundling machine

Abstract

The invention relates to an feeding table, comprising a pair of rollers ( 13, 14 ), referred to as pressers, arranged downstream from the cutting system, said pair including a motor-driven roller ( 13 ) and at least two driven rollers ( 14 ) which are arranged so as to form at least two pressure tracks engaging with the plastic film ( 6 ) moving between said pair of rollers ( 13, 14 ). Each pressure track includes a driven roller ( 14 ), the shaft ( 23 ) of which is supported by a mobile frame ( 19 ) that is guided on a beam ( 20 ), wherein said beam ( 20 ) is secured to the general frame ( 2 ) and a foolproof system for applying pressure is provided between said beam ( 20 ) and said frame ( 19 ) in order to restrain said driven roller ( 14 ) and hold the latter in tangential contact with the motor-driven roller ( 13 ).

1 - 7 . (canceled) 
     
     
         8 . A feeding table comprising, along a path traveled by a plastic film, upstream from a bundling module, pairs of rollers for advancing and maintaining tension on said plastic film and a cutting system for cutting said plastic film, said pairs of roller being supported by a table frame and being arranged respectively upstream and downstream of said cutting system;
 wherein one of said pairs of rollers is a tensioning pair, arranged downstream from said cutting system, and which comprises a pressure roller which is motorized and, associated with said motorized pressure roller, at least two driven pressure rollers, said driven pressure rollers being arranged so as to form at least two pressure tracks pressing on said plastic film which is traveling between said motorized pressure roller and said driven pressure rollers, and   wherein each driven pressure roller is made of steel with an axle supported by a roller frame, said driven pressure rollers being assembled independently of each other, each roller frame being mobile, guided on a beam which acts as a reference and which is solidly attached to said table frame , each roller frame being independent of the other.   
     
     
         9 . The feeding table according to  claim 8 , comprising a foolproof pressure application system placed between said beam and each roller frame in order to restrain each of said driven pressure rollers and hold said driven pressure rollers in tangential contact with said motorized pressure roller. 
     
     
         10 . The feeding table according to  claim 9 , wherein said pressure application system comprises at least one coil spring arranged on said beam, said at least one coil spring being associated with a tappet which is guided relative to said beam, said tappet being in contact with and pressing continuously against said roller frame of the corresponding driven pressure roller, due to a force exerted by said at least one coil spring, the number of tappets and coil springs being chosen to establish a given pressure at said tensioning pair, comprising at least three pressure rollers. 
     
     
         11 . The feeding table according to  claim 10 , wherein said pressure application system comprises at least one pressure element, each pressure element comprising a spring and a tappet and being arranged in a bore-hole created within the thickness of said beam, said bore-hole comprising, at an end on a roller frame side, a shoulder which serves as a support for a base of said tappet, and at another opposed end, a plate acting to cover said bore-hole and serving to support said spring, said plate being removable to allow accessing said pressure element, in order to be able to modify the amount of pressure between the pressure rollers. 
     
     
         12 . The feeding table according to  claim 8 , wherein said beam has two ends and comprises, at said ends, attachment means for fastening said beam to said table frame. 
     
     
         13 . The feeding table according to  claim 12 , wherein said attachment means fasten said ends of said beam to a part of said table frame which is retractable to provide access to said pairs of rollers and to said cutting system. 
     
     
         14 . The feeding table according to  claim 12 , wherein an assembly comprising said driven pressure rollers, said roller frames, and said beam is in the form of a module, said module being equipped with removable attachment means to enable practical and convenient attachment of said assembly onto said table frame.