Method of and means for making reclosable bag material, and material produced thereby
AssigneeSignode Corporation
InventorsDonald Van Erden, Donald W. Noren
Life of this patent
Estimating the term…
Abstract
A method of and apparatus for making, and the resulting material for fabricating reclosable bags and in which a length of web of predetermined width of bag material as wound on a mandrel has fastener strip sections joined to and across the width of the web. The web is adapted to travel continuously spirally about the mandrel. The fastener carrying web may be folded longitudinally and resiliently flexible profiles of the folded fastener strip sections separably joined. Ends of the fastener strips before, and after, folding may be flow melted and fusedly flattened. Ends of the fastener strips may be aligned with a fold juncture of an underturned flange of the web and the margin then unfolded to extend beyond the strip ends.
Claims39
A method of making reclosable bag material, comprising:
- winding a length of web of predetermined width of bag material on a mandrel;
- and joining a fastener strip section to and across the width of the web as wound on the mandrel.
Apparatus for making reclosable bag material, comprising:
- a mandrel;
- means for winding a length of web of predetermined width of bag material on said mandrel;
- and means for joining a fastener strip section to and across the width of said web as wound on the mandrel.
Bag making material in the form of a continuous ribbon web having extending thereacross from longitudinal side to longitudinal side and at longitudinally spaced intervals therealong resiliently flexible profile fastener strip sections, and comprising:
- at least one of the ends of said sections being flow melted and fusedly flattened.
A method of making reclosable bag material, comprising:
- folding under at least one margin of web material along a side edge so that a fold juncture results where the margin joins the remainder of the web;
- assembling with and joining to the web a separable fastener strip extending across the web with an end of the strip aligned with said juncture;
- and unfolding the margin to project beyond said strip end.
Dependencies are inferred from the claim text.