Bag making machine
AssigneeThe Dow Chemical Company
InventorsDavid A. Smith, Herbert B. Geiger, R. Douglas Behr
Life of this patent
Estimating the term…
Abstract
A bag making machine and method for the continuous production of bags from a folded web of thermoplastic material is provided. The apparatus includes a capability for making bags of differing widths. The apparatus includes a rotatable drum having a plurality of sever and seal stations for forming individual positioned about the outer periphery of the drum. A source of a continuous folded web of thermoplastic material is also provided, and continuously fed onto the surface of the drum. Means positioned between adjacent sever and seal stations tuck the web of material inwardly from the periphery of the drum.
Claims15
An apparatus for the continuous production of bags from a folded web of thermoplastic material comprising:
- a source of a continuous folded web of thermoplastic material;
- a rotatable drum having a plurality of sever and seal stations located about the outer periphery thereof for forming individual bags, said sever and seal stations including means for clamping said web of thermoplastic material to the surface of the drum, said clamping means including a plurality of seal bar asssemblies secured to an endless conveyor positioned adjacent said sever and seal stations;
- means for continuously feeding said folded web of thermoplastic material onto the surface of said drum;
- and means mounted on adjacent sever and seal stations and positioned therebetween for tucking said web of material inwardly from the periphery of said drum to control the width of said bags, said tucking means being mounted on respective seal bar assemblies.
An apparatus for the continuous production of bags of differing widths from a folded web of thermoplastic material comprising:
- a rotatable drum having a plurality of sever and seal stations located above the outer periphery thereof for forming individual bags;
- a source of a continuous folded web of thermoplastic material;
- means for continuously feeding said folded web of thermoplastic material onto the surface of said drum;
- a plurality of means for clamping said web to the surface of said drum at each of said respective sever and seal stations, said clamping means including a plurality of seal bar assemblies secured to an endless conveyor positioned adjacent said sever and seal stations;
- means mounted on adjacent sever and seal stations and positioned therebetween for tucking said web of material inwardly from the periphery of said drum to control the width of said bags, said tucking means being mounted on respective seal bar assemblies;
- and
- means for transferring individual bags from said drum.
Dependencies are inferred from the claim text.