Heat-shrinkable packaging receptacle
OwnerGregory Robert Pockat, Thomas Andrew Schellinventors
Life of this patent
Estimating the term…
Abstract
An individual end-sealed packaging receptacle, such as a bag, formed from a sheet of heat-shrinkable film having a first edge and an opposing second edge. The packaging receptacle includes a first seal bonding the first edge and second edge to define a tube member having a first bag wall, a second bag wall, first and second opposing lay-flat bag edges, an end and an open mouth. The packaging receptacle includes a second seal through the first and second bag walls, extending laterally across the width of both the first and second walls and thereby closing the end. A method of forming a individual, end-sealed, heat-shrinkable packaging receptacle is also disclosed.
Claims43
An individual end-sealed packaging receptacle formed from a sheet of a heat-shrinkable film, said film having a first edge and an opposing second edge, said receptacle comprising:
- a first seal bonding said first edge and said second edge thereby defining a tube member having a first tube wall, a second tube wall, opposing first and second lay-flat edges, an end and an open mouth, said first seal being positioned between said first and second lay-flat edges;
- a second seal provided through said first and second tube walls, said second seal extending laterally across the width of both said first and second walls at a position approximate said end, whereby an empty product receiving chamber is defined by said first wall, said second wall, said second seal and said open mouth.
An end-sealed packaging receptacle formed from a sheet of a heat-shrinkable film, said film having a first edge and an opposing second edge, said receptacle comprising:
- a first seal bonding said first edge and said second edge and defining a tube member having a first tube wall, a second tube wall, opposing first and second lay-flat edges, a closed end and an open mouth, said first seal comprising a lap seal;
- a second seal provided through said first and second walls, said second seal extending laterally across the width of both said first and second walls at a position approximate said end, whereby a product receiving chamber is defined by said first wall, said second wall, said second seal and said open mouth.
An end-sealed packaging receptacle formed from a sheet of a heat-shrinkable film, said film having a first edge and an opposing second edge, said receptacle comprising:
- a first seal bonding said first edge and said second edge and defining a tube member having a first tube wall, a second tube wall, opposing first and second lay-flat edges, a closed end and an open mouth, said first seal comprising a butt-seal;
- a second seal provided through said first and second walls, said second seal extending laterally across the width of both said first and second walls at a position approximate said end, whereby a product receiving chamber is defined by said first wall, said second wall, said second seal and said open mouth.
A method of forming an individual, end-sealed, heat-shrinkable packaging receptacle from a flat sheet of film, said method comprising the steps of:
- (a) providing a heat-shrinkable thermoplastic film having a first edge and an opposed second edge;
- (b) bringing said first and second edges together;
- (c) forming a first seal joining said first and second edges to form a tube member having a first tube wall, a second tube wall, a bottom and an open mouth;
- and,
- (d) providing a second seal through said first and second tube walls, said second seal extending laterally across said tube member at a position approximate said bottom.
A method of forming a heat-shrinkable bag comprising the steps of:
- (a) coextruding a primary film tube;
- (b) biaxially stretching said film tube to provide a heat-shrinkable film tube stock;
- (c) slitting said tube stock to form a continuous sheet of film;
- (d) slitting said continuous flat sheet of film longitudinally to form a desired-width bag film;
- said desired-width bag film having a first edge and an opposing second edge;
- (e) sealing said first and second edges to form a tube member having a first wall, a second wall and a product receiving chamber defined between said first and second walls;
- (f) providing a first lateral seal through said first and second walls, said seal extending laterally across the width of said tube member;
- and
- (g) providing a cut through said tube member, said cut extending laterally across the width of said tube member, whereby a bag is formed having a bag mouth on one end formed by said cut and having said first lateral seal proximate a bag end at an opposing end from said bag mouth.
A tubular film for producing end-sealed packaging receptacles, said tubular film formed from a sheet of a heat-shrinkable film, said film having a first edge and an opposing second edge, said tubular film comprising:
- a first seal longitudinally joining said first edge and said second edge and defining a tube member having a first tube wall, a second tube wall and opposing first and second lay-flat edges;
- said first seal selected from the group consisting of a lap seal, a butt-seal and a fin seal, wherein said tube member has a lay-flat width of greater than or equal to 22 inches.
A tubular film for producing end-sealed packaging receptacles, said tubular film formed from a sheet of a heat-shrinkable film, said film having a first edge and an opposing second edge, said tubular film comprising:
- a first seal longitudinally joining said first edge and said second edge and defining a tube member having a first tube wall, a second tube wall and opposing first and second lay-flat edges;
- said first seal selected from the group consisting of a lap seal, a butt-seal and a fin seal, wherein said tube member includes an indicia thereon.
A tubular film for producing end-sealed packaging receptacles, said tubular film formed from a sheet of a heat-shrinkable film, said film having a first edge and an opposing second edge, said tubular film comprising:
- a first seal longitudinally joining said first edge and said second edge and defining a tube member having a first tube wall, a second tube wall and opposing first and second lay-flat edges;
- said first seal selected from the group consisting of a lap seal, a butt-seal and a fin seal, wherein said tube member has a lay-flat width of greater than or equal to 22 inches and said tube member includes an indicia thereon.
Dependencies are inferred from the claim text.