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US 4,655,862 AGranted
Method of and means for making reclosable bags and method therefor
AssigneeMinigrip, Inc.
InventorsPaul B. Christoff, Steven Ausnit
Life of this patent
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AssigneeMinigrip, Inc.
InventorsPaul B. Christoff, Steven Ausnit
Estimating the term…
A method of making making reclosable bags and material for making the bags, and apparatus wherein in one aspect extruded resiliently flexible plastic profiled reclosable fastener strip means for reclosable bags is located across the longitudinal formation axis of the bag wall web material, and in another aspect of the invention single strip fastener strip has at one or more suitable locations therealong separations across the profiles, such as notches, to facilitate bending or folding of the strip upon itself so that the self-interlocking profiles of the portions of the strip folded upon themselves are adapted for reclosable interlocking with one another. The interlockable portions of the strip may have separable air tight sealing ribs therealong. The web and fastener material and fastener assembly is especially suitable for machines wherein the bags are formed, filled and sealed.
A method of making a reclosable bag having a body with top and bottom ends and confronting walls, comprising:
A method according to claim 6, which comprises securing in laminar relation margins of said web material extending parallel to said longitudinal forming axis, and in the securing of said margins bringing ends of said fastener strip means into end-to-end alignment with one another.
A method according to claim 6, which comprises effecting said securing of the fastener strip means across a length of said web material upstream from the forming and filling nozzle cylinder of a form, fill and seal machine, shaping the web material about said cylinder into a bag making tube, securing at said cylinder longitudinal margins of said web material tube into a laminar joint and bringing ends of said fastener strip means into end-to-end alignment, advancing said tube by a bag length increment beyond a filling nozzle end of said cylinder and sealing said ends of said bag body, and coordinated with said sealing filling contents into the bag from said nozzle end of said cylinder.
A method of making reclosable bag material, comprising:
A method according to claim 13, which comprises supplying said fastener strip from a continuous source, pulling said fastener strip across said web, effecting securing of said fastener strip to the web, and severing the section of fastener strip secured to the web from said continuous fastener strip supply length.
A method according to claim 13, which comprises securing sections of said fastener strip to a continuous elongate sheet of said web at bag length intervals along the sheet.
Apparatus for fabricating bag material, comprising:
Dependencies are inferred from the claim text.