Method and apparatus for interleaving plastic bags
AssigneeCustom Machinery Design, Inc.
InventorsPeter J. Gietman, Jr., Stephen A. Saindon
Life of this patent
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Abstract
The present invention is directed to a method and apparatus for winding bags. A winder in accordance with the present invention includes a dancer assembly for speed regulation, a haul-in assembly for receiving a film, and a tumbler assembly to receive the film from the haul-in assembly. The tumbler assembly increases the path length the film travels to either separate bags and/or to provide for interleaving.
Claims22
An apparatus for winding a roll of bags having a leading and a trailing end from a strip of bags comprising.
- a haul-in assembly;
- a tumbler assembly disposed to receive the strip from said haul-in assembly, said tumbler assembly including a rotating tumbler, whereby the path length the trailing end of each bag travels is increased when said rotating tumbler rotates;
- a perforation sensor disposed upstream of said tumbler assembly, said perforation sensor having an output indicative of the presence or absence of a perforation in said strip;
- and
- a winding assembly disposed to receive the strip from said tumbler assembly;
- wherein said rotating tumbler rotates and separates adjacent bags in response to said perforation sensor output.
An apparatus for winding a roll of bags having a leading and a railing end from a strip of bags comprising:
- a haul-in assembly, including at least one haul-in roll operating at a haul-in speed;
- a tumbler assembly disposed to receive the strip from said haul-in assembly, said tumbler assembly including a rotating tumbler means for increasing the length of the path the trailing end of each bag travels, and said tumbler assembly further includes means for interleaving the bags, whereby the leading end of a second bag is downstream of the trailing end of a first bag;
- a winding assembly disposed to receive the strip from said tumbler assembly, wherein said winding assembly operates at a speed less than said haul-in speed;
- a perforation sensor disposed upstream of said tumbler assembly, said perforation sensor having an output indicative of the presence or absence of a perforation;
- and
- a dancer assembly wherein said dancer assembly includes means for providing a signal indicative of a difference between the speed of the strip upstream from said dancer assembly and downstream from said dancer assembly, and wherein said winding assembly speed and said haul-in assembly speed are responsive to said signal.
An apparatus for winding a roll of bags having a leading and a trailing end from a film of bags comprising:
- a dancer assembly;
- a haul-in assembly, including at least one haul-in roll operating at a haul-in speed;
- a tumbler assembly disposed to receive the film from said haul-in assembly, wherein said tumbler assembly includes a rotating tumbler means for increasing the length of the path the trailing end of each bag travels in said tumbler assembly;
- and
- a winding assembly disposed to receive the film from said tumbler assembly;
- wherein the film passes through said haul-in assembly at a speed less than the speed at which said haul-in assembly operates.
A method for winding interleaved bags from a strip of bags, each bag having a leading and a trailing end, comprising the steps of:
- driving the strip at a first speed in a first stage;
- sensing the presence or absence of a perforation on the strip;
- driving the strip at a second speed in a second stage, said second stage being downstream of said first stage, wherein aid second speed is less than said first speed, thereby creating slack in said strip;
- increasing the path length that the trailing end of each bag follows between the first and second stages and separating adjacent bags by mechanically taking up the slack in said strip;
- interleaving said bags when said path length is increased, whereby the trailing end of a first bag is downstream of the leading end of a second bag;
- and
- winding said bags.
Dependencies are inferred from the claim text.