Automatic baler for bundling together individual food bags previously filled in automatic packers

An automatic baler for bundling together packages previously filled, closed and sealed in a packer machine, comprising:

• an endless conveyor constituting an inlet of said automatic baler, said endless conveyor operatively associated with an outlet of a packer machine in such a way that every new package therein formed is fed upon a moving surface of said conveyor;
• a first station comprising a first pneumatic cylinder and a first sensor, said first station being disposed at an end of said endless conveyor in such a way that each of said packages, upon arrival at said first station is stopped and detected by said sensor and subsequently pushed by said first pneumatic cylinder in a lateral movement toward a second station;
• said second station comprising a stacking hopper having a top side upon which said packages displaced from said first station by said first pnuematic cylinder are disposed side by side to constitute a layer of packages, said top side of said stacking hopper comprising a pair of endless bands of modifiable configuration, rotatably supported on respective pulley sets in such a way that said configurations are modifiable between a closed position and an open position such that when taken to said closed position said endless bands adjoin in coplanar relationship over said stacking hopper thereby closing said stacking hopper and constituting at the same time said second station for receiving said packages, and when taken to said open position, said endless bands are laterally separated in opposite directions leave open said stacking hopper allowing said packages grouped at said second station to drop downwardly into said stacking hopper, each of said endless bands being associated with a set of pulleys comprising a driven pulley, a fixed idle pulley, and a pair of moveable idle pulleys, said driven pulley and said fixed idle pulley having shafts mounted in rotatable fixed form and said pair of moveable idle pulleys having shafts mounted in rack and pinion form so as to be moveable in lateral, parallel, and opposite fashion between said closed position and said open position, said top side of said stacking hopper having a second sensor such that when said second sensor determines that a predeterminate number of said packages have been therein grouped said second senosr will activate said top side of said stacking hopper to separate said endless bands leaving open said top side of said stacking hopper in order that said layer of packages drops freely downward into said stacking hopper;
• an extension of said stacking hopper defining a rear projecting mouth for receiving a mouth of bigger bag, said projecting mouth having therein associated a bag opener comprising a flat surface conforming to an upper moveable side of said rear projecting mouth capable of being moved in a vertical fashion driven by a second pneumatic cylinder between a lower position and an upper position, in such a way that when taken to said lower position said flat surface rests upon said upper side of said rear projecting mouth thereby reducing said rear projecting mouth in size so as to allow an operator to install said bigger bag, by surrounding a rear side of said rear projecting mouth with said mouth of said bigger bag, and when taken to said upper position said mouth of said bigger bag is displaced to an open condition readying said bigger bag to receive a stacking of said layers of packages integrated together by said stacking hopper;
• a third pneumatic cylinder disposed in association with said stacking hopper having a piston and a flat pusher on a distal end of said piston so as to be moveble in a path longitudinal to said stacking hopper when a third sensor determines that a predeterminate stack of said layers of packages has been formed in said stacking hopper, pushing in skidding fashion said stack of layers into said bigger bag while said flat surface keeps said mouth of said bigger bag open;
• said second pneumatic cylinder being operable to lower again said flat surface to a resting position upon said upper side of said projecting mouth freeing said mouth of said bigger bag in order that an operator can proceed to withdraw said bigger bag for later or consequently closing or sealing said bigger bag in any known manner.