Valve bag feeding method and machine for powder material packaging apparatus
AssigneesUNICEM-Unione Cementerie Marchino, Emiliane e di Augusta, S.p.A., Andrea Doria
InventorAngelo Raiteri
Life of this patent
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Abstract
To place the bags on a filling spout, the bags are hurled one at a time w the valve flange through a shaping tube, which is distanced from the spout as to allow the filled bag to be removed from the spout without displacing the tube. The bag is hurled at high speed by at least one continuously moving belt engaging the bag body along the entire length of the tube, as to be placed on the spout substantially when the valve flange leaves the tube. This latter is formed of two symmetric parts, the distance between which is adjustable by means of double screws having two ends threaded in opposite directions and engaging corresponding holes of the two parts of the tube.
Claims16
In a packaging apparatus for powder material having at least one filling spout, a valve bag feeding machine for picking up the bags one at a time from a magazine and placing same on said filling spout, comprising:
- a shaping tube having an internal curved surface and a section continuously variable throughout its length for causing the valve flange of a bag crossing said tube to be shaped as to open said valve,
- a downwards directed notch on said tube for the passage of the bag body, said tube having a substantially horizontal axis aligned with said spout and being distanced from said spout as to allow the bag to be filled and removed from the spout without displacing the tube,
- means for bringing one bag at a time to the entrance of said tube, and
- belt means continuously moved for engaging the body of the bag, so brought at said entrance, below said notch substantially along the entire length of said tube, said belt means hurling the engaged bag at high speed as to cause the valve flange to cross said tube and to assure its placing on said spout substantially when said valve flange leaves said tube, due solely to the hurling action of said belt means.
In a packaging apparatus for powder material having at least one filling spout, a valve bag feeding machine for picking up the bags one at a time from a magazine and placing same on said filling spout, comprising:
- a shaping tube having a variable section for shaping the valve flange of a bag crossing said tube as to open said valve,
- a downwards directed notch on said tube for the passage of the bag body, said tube having a substantially horizontal axis aligned with said spout and being distanced from said spout as to allow the bag to be filled and removed from the spout without displacing the tube,
- hurling means for hurling the bag at high speed as to cause the valve flange to cross said tube and to assure its placing on said spout substantially when said valve flange leaves said tube, and a pair of bars for supporting and guiding said valve flanges when crossing said tube, said pair of bars being located inside said tube substantially parallel to the axis of said tube.
Method for placing a bag having a valve flange on a spout of a powder material packaging apparatus, characterized by the step of picking up the bags one at a time from a magazine, the step of bringing the picked up bag to the entrance of a stationary shaping tube having a substantially horizontal axis aligned with said spout, the step of causing the valve flange of said bag to cross said tube, said tube having an internal curved surface and a section continuously variable through its length as to cause said valve to be opened, and by the step of hurling said bag when crossing said tube at such high speed as to assure that said valve be placed on the spout substantially when said valve flange has left said tube due solely to said hurling action.
In a packaging apparatus for powder material having at least one filling spout, a valve bag feeding machine for picking up the bags one at a time from a magazine and placing same on said filling spout, each bag having at one edge a fold flange forming two wings and a valve which can be opened by pushing the two wings one toward the other, comprising:
- a shaping tube having a section continuously variable throughout its length for causing the valve flange of a bag crossing said tube to be shaped by pushing the two wings of the flange one toward the other as to open said valve, said tube being so distanced from said spout as to allow the bag to be filled and removed from the spout without displacing the tube,
- a downwards directed notch on said tube for the passage of the bag body, said tube having a substantially horizontal axis aligned with said spout, means for bringing one bag at a time to the entrance of said tube, and at least a pair of belts permanently in mutual contact and continuously movable for engaging the body of the bag so brought at said entrance, below said notch substantially along the entire length of said tube, for causing the valve flange to cross said tube and to assure its placing on said spout.
Method for placing on a spout of a powder material packaging apparatus, a bag having at one edge of fold flange forming two wings and a valve which can be opened by pushing the two wings one toward the other, characterized by the step of picking up the bags one at a time from a magazine, the step of bringing the picked up bag to the entrance of a stationary shaping tube having a substantially horizontal axis aligned with said spout, the step of causing the valve flange of said bag to cross said tube, said tube having a section continuously variable through its length as to push the two wings of the flange one towards the other to cause said valve to be opened, and by the step of hurling said bag when crossing said tube at such a speed as to assure that said valve be placed on the spout substantially when said valve flange has left said tube.
A valve bag opening device for bags having at one edge a fold flange forming two wings and a valve adapted to be opened, said device comprising:
- a pair of shaping members symmetric with respect to a vertical plane and having a continuously variable cross section throughout their length, said members being so bent as to form a tube with a downwardly directed notch,
- a pair of belts having a portion permanently in mutual contact on said vertical plane along the entire length of said tube, and moving means for continuously moving said belts for engaging the body of a bag to cause its valve flange to pass inside said tube, said members including a first zone at the entrance side for said bag forming a passage larger than said valve flange, a second subsequent zone where said passage becomes narrower than said valve flange as to push said wings one toward the other to cause said valve flange to be curved, said first and second zones having an axis substantially parallel to said portion of the belts, said members including a third zone having an axis forming with the axis of said first and second zones an angle opposite to the body of the bag with respect to the valve flange to cause said flange to be displaced with respect to the bag body so as to open said valve.
Dependencies are inferred from the claim text.