Zippered film and bag
OwnerJames W. Yeagerinventor
Life of this patent
Estimating the term…
Abstract
A reclosable bag and plastic film and method for making the bag. The bag has a reclosable fastener connected to a single wall of the bag, and the film has a reclosable fastener connected to one side thereof which does not require attachment to any other portion of the film when making a bag. The fastener has a tamper-proof member attached thereto to indicate if the bag has been previously opened. The method includes providing a roll of film with attached fasteners, unwinding the film, forming it into a tube, and sealing the tube to form a bag.
Claims5
A method for making reclosable bags comprising:
- a. connecting a plurality of reclosable fasteners each with two interlocking profile strips to a rectangular sheet of film having two parallel side edges and a top and a bottom edge, said reclosable fasteners being less than half the width of said rectangular sheet of film and spaced a single bag length apart, said reclosable fasteners being perpendicular to said two side edges, each profile strip of each reclosable fastener being maintained in interlocked position and being independently connected to the same side of said film, said film being maintained in a flat unfolded state,
- b. winding said sheet of film in said flat unfolded state into a roll on a cylindrical core material, said reclosable fasteners being perpendicular to the direction said film is wound upon said core,
- c. unwinding said roll of film and overlapping said side edges of said film to form a tube to enclose said reclosable fasteners on the inside of said tube, said tube having a top edge and a bottom edge,
- d. sealing said overlapped side edges of said film,
- e. sealing said bottom edge of said tube, and
- f. sealing said tube said single bag length from said bottom edge to form a top edge of said bag to enclose a single reclosable fastener.
A roll of film for making reclosable bags on form, fill, and seal machines, said film comprising:
- a. a rectangular sheet of film having two parallel side edges and a top and a bottom edge,
- b. reclosable fastener assemblies each with two interlocking profile strips independently connected to one side of said film a single bag length apart, said reclosable fastener assemblies being perpendicular to said two side edges, said reclosable fastener assemblies being less than half the width of said rectangular sheet of film,
- c. each profile strip of each reclosable fastener being maintained in interlocked position and being independently connected to the same side of said film while said film is maintained in a flat unfolded state, and
- d. said film being wound into a roll while being maintained in said flat unfolded state whereby said side edges of each spiral of said roll are substantially aligned.
Dependencies are inferred from the claim text.