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US 4,279,608 AGranted
Bag bottom forming machine and transfer apparatus
AssigneeDevelopak Corporation
InventorJack R. Evers
Life of this patent
Estimating the term…
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AssigneeDevelopak Corporation
InventorJack R. Evers
Estimating the term…
This relates to a bag forming machine wherein a continuous tube is formed from a contuous web, the tube having a side seam and being cut off at predetermined intervals to form short tubes with closed bottoms. The tubes are placed on mandrel assemblies of a turret and the mandrel assemblies, as the turret is indexed, are actuated so as to axially elongate the closed tubes while holding the open end of each tube against movement, thereby generally forming a flat bottom on the tube and triangular bottom portions. The turret is next indexed so as to plow down the triangular bottom portions flat against the flat bottom portion followed by further indexing of the turret to heat seal the triangular positions to the flat bottom portion and then cool the heat seals. Finally, each closed bottom bag is gripped by a combined rotator and orientation device wherein the side seam of the bag is rotated to a selected orientation. The flat bottom bag is then transferred from the turret into a pocket of a conveyor which directs the bag to a filler and then a heat sealer for closing the closed bag. In order to effect the transfer of the bag from the turret, it is necessary that an outer mandrel of each mandrel assembly be projected radially from the turret a considerable distance. This is effected by way of a plunger carrying the mandrel and an associated cam. The cam has a sector thereof which is radially movable relative to the remainder of the cam by a rocker arm which is actuated in timed relation to the indexing of the turret so as to provide for the necessary outer mandrel travel.
An apparatus for shaping a sealed tube bottom into a flat bag bottom and delivering the shaped bag to take-away means, said apparatus comprising a turret, means mounting said turret for indexing movement about a fixed generally horizontal axis, said turret having a plurality of stations, each of said stations including a mandrel assembly, each mandrel assembly including an inner mandrel, and an outer mandrel, a plunger for each outer mandrel and extending into the interior of said turret through said inner mandrel, and cam means cooperating with an inner end of said plunger for positioning said outer mandrel relative to said inner mandrel, and orienting means for engaging the bag while on said mandrel assembly and rotating the bag about the axis of said mandrel assembly.
An apparatus for shaping a sealed tube bottom into a flat bag bottom and delivering the shaped bag to take-away means, said apparatus comprising a turret, means mounting said turret for indexing movement about a fixed generally horizontal axis, said turret having a plurality of stations, each of said stations including a mandrel assembly, each mandrel assembly including an inner mandrel, and an outer mandrel, a plunger for each outer mandrel and extending into the interior of said turret through said inner mandrel, and cam means cooperating with an inner end of said plunger for positioning said outer mandrel relative to said inner mandrel, said cam including a discharge portion in the form of a separately formed cam segment, and means for moving said cam segment radially away from the remainder of said cam to project said outer mandrel to a greatly projected discharge position.
An apparatus for shaping a sealed tube bottom into a flat bag bottom and delivering the shaped bag to take-away means, said apparatus comprising a turret, means mounting said turret for indexing movement about a fixed generally horizontally axis, said turret having a plurality of stations, each of said stations including a mandrel assembly, each mandrel assembly including an inner mandrel, and an outer mandrel, a plunger for each outer mandrel and extending into the interior of said turret through said inner mandrel, and cam means cooperating with an inner end of said plunger for positioning said outer mandrel relative to said inner mandrel, clamp means for clamping a tube to each mandrel assembly and restraining the tube against radial outward movement, each mandrel assembly including a fixed mandrel portion adjacent said inner mandrel, and said clamp means being cooperable with said fixed mandrel portion.
An apparatus for shaping a sealed tube bottom into a flat bag bottom and delivering the shaped bag to take-away means, said apparatus comprising a turret, means mounting said turret for indexing movement about a fixed generally horizontal axis, said turret having a plurality of stations, each of said stations including a mandrel assembly, each mandrel assembly including an inner mandrel, and an outer mandrel, a plunger for each outer mandrel and extending into the interior of said turret through said inner mandrel, and cam means cooperating with an inner end of said plunger for positioning said outer mandrel relative to said inner mandrel, said apparatus including a main support in the form of a vertical wall separating said machine into a sanitary product handling half and a drive machinery half.
Dependencies are inferred from the claim text.