Equipment for inserting packets into bags

Abstract

Equipment ( 10 ) for inserting packets ( 11 ) into bags ( 12 ) comprises a device ( 30 ) suitable for deforming the bag and squaring and stiffening means ( 40 ) of the bag suitable for forming a draft and guide for the insertion of one or more packets of products.

1 . Equipment ( 10 ) for inserting packets ( 11 ) into bags ( 12 ) characterized in that it comprises a device ( 30 ) suitable for deforming the bag ( 12 ) and squaring and stiffening means ( 40 ) of the bag ( 12 ) suitable for forming a draft and guide for the insertion of one or more packets ( 11 ) of products.  
   
   
       2 . The equipment ( 10 ) according to  claim 1 , wherein said device ( 30 ) comprises a pair of suction sleeves ( 31 ) which can be transversally translated, symmetrically and synchronously, with respect to the moving direction of the bags and are positioned opposite each other to the side of the bag ( 12 ) close to its upper opening ( 12 ′) and in a central position so as to withhold by suction a portion of each side wall ( 12   a ) of the bag.  
   
   
       3 . The equipment ( 10 ) according to  claim 2 , wherein said squaring and stiffening means ( 40 ) comprise a pair of shaped blades ( 41 ) having flap-folded side edges ( 42 ) so as to produce a “U” section.  
   
   
       4 . The equipment ( 10 ) according to  claim 3 , wherein said shaped blades ( 41 ) are supported by pins ( 43 ) capable of effecting a rotation and bringing the blades to a horizontal position in which they cover the mouth ( 12 ′) in a substantially vertical position by rotation of about 90 degrees, whereby the ends of the blades are inserted inside the bag, engaging the front walls ( 12   b ) and give the mouth ( 12 ′) of the bag a square form having a maximum amplitude.  
   
   
       5 . The equipment ( 10 ) according to  claim 4 , wherein said pins ( 43 ) are connected to rotation leverisms comprising a pair of rods ( 44 ), one for each side of the station, connected at the ends by means of transmission levers ( 45 ) and driven by at least one linear actuator ( 46 ), preferably two linear actuators ( 46 ).  
   
   
       6 . The equipment ( 10 ) according to  claim 5 , wherein said equipped is positioned along a feeding line ( 13 ) of bags ( 12 ) coming from a forming plant or from a distributor and supported on trays ( 14 ) having folded edges ( 15 ), suitable for containing and also supporting the bags.  
   
   
       7 . The equipment ( 10 ) according to  claim 6 , wherein said bags are made of a plastic material such as polyethylene for food or similar, and have a limited rigidity which allows self-sustainment in an open position and in elevation and have a substantially parallelepiped form delimited by side walls ( 12   a ) positioned parallel to the translation direction of the bags and front walls ( 12   b ), transversal to said direction.  
   
   
       8 . The equipment ( 10 ) according to  claim 6 , wherein said packets ( 11 ) are of the soft type.  
   
   
       9 . A packaging plant equipped with equipment ( 10 ) according to  claim 1.