Method of making bags
AssigneeRimbo Tekniska Fabrik Rimpac AB
InventorKent A. R. Nordin
Life of this patent
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Abstract
There is provided a method of manufacturing a string of bags from a hose-like blank. The blank is cut along a wave-shape line substantially centrally between two opposed long edges of the blank, to form two blank-halves. Welds are made adjacent selected wave-tops and wave-bottoms of the wave-shape line to form bag handles, and further welds are made perpendicularly to said wave-shape line at selected distances apart to form said string of bags. Separation lines are made adjacent said further welds to bundle a bag to be separated from the string of bags thus formed.
Claims10
A method of making a string of bags from a blank comprising two layers of material joined together along at least three edges thereof, said method comprising the steps of cutting the layers of material along a line of wave-shape extending parallel to a pair of opposed edges, substantially centrally therebetween, the wave-tops and wave-bottoms of said wave-shape being uniformly spaced apart;
- displacing the thus obtained blank halves axially relative to one another in a manner such that a wave-bottom coincides with an adjacent wave-top to form an opening of regular geometric shape;
- welding the material along a line extending centrally between adjacent openings to form bag handles;
- welding the material along further lines extending perpendicularly to said firstmentioned line and being uniformly spaced apart by a distance equal to the desired width of the bag;
- and providing separation lines adjacent to and parallel with said further lines.
A method of making a string of bags from a blank comprising two layers of material placed one upon the other and joined, as by welding, together along at least two edges thereof to form a hose, said method comprising the steps of cutting the blank along a line of wave-shape extending parallel to a pair of opposed edges, centrally therebetween, the wave-tops and wave-bottoms of said wave-shaped line being uniformly spaced apart;
- welding each of the blank halves thus formed along a first line between mutually adjacent wave-bottoms and a second line between mutually adjacent wave-tops, said first line being on one side of the line of wave-shape and adjacent thereto and said second line being on the other side of said line of wave-shape and adjacent thereto to form the handles of the bags;
- welding the material along further lines extending perpendicularly to said first and second line and being uniformly spaced apart by a distance equal to the desired width of the bag;
- and by providing separation lines adjacent to and parallel with the aforementioned further lines.
Dependencies are inferred from the claim text.