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US 4,528,224 AGranted
Method of making multiple reclosable bag material
AssigneeMinigrip, Inc.
InventorSteven Ausnit
Life of this patent
Estimating the term…
Abstract
A method of making multiple reclosable bag material, which comprises advancing from a supply source bag wall film in continuous strip form and providing confronting colinear wall panel portions with surfaces facing toward one another, feeding separable fastener assembly in continuous strip form from a supply source into corunning relation between the wall panel portions, and permanently securing to the wall panel portion surfaces oppositely facing base surfaces of the fastener assembly. The material thus formed is adapted to be split longitudinally into a plurality of bag material strip sections adapted to be sealed across at spaced intervals into bag units.
Claims14
A method of making multiple reclosable bag material, comprising:
- advancing from a supply source bag wall film as a continuous ribbon and providing confronting colinear wall panel portions with surfaces facing toward one another and of a width sufficient to provide two continuous bag strip sections;
- feeding a continuous length of double separable fastener assembly from a supply source into corunning relation between said wall panel portions and intermediate and spaced from the longitudinal sides of said wall panel portions, and wherein said fastener assembly has two coextensive webs which carry along confronting opposite longitudinal margins respective complementary resiliently flexible fastener profile sets which are separably interlocked and with substantial width areas of the webs intervening between the profile carrying margins on each of the webs and having respective oppositely facing base surfaces;
- placing said web base surfaces respectively in laminar relation to said facing surfaces on superjacent parts of the bag wall film panel portions;
- and permanently securing into a laminate each of said superjacent parts of said wall panel portions and only intermediate areas of the webs and leaving the profile carrying marginal portions of each of the webs free from the panel portion surfaces;
- so that by longitudinally separating said laminates between and spaced from said fastener profile sets into separate bag making strips, each strip will have thereon one of said fastener profile sets and each strip will be provided with multi-layer pull flanges formed from said laminates and with both of the fastener carrying margins free from the panel portion surfaces on both wall panel portions of each strip.
2 more elements
A method of making multiple reclosable bag material, comprising:
- advancing from a supply source bag wall film as a continuous ribbon and providing confronting colinear wall panel portions with surfaces facing toward one another and of a width sufficient to provide two continuous bag strip sections;
- feeding a continuous length of double separable fastener assembly from a supply source into corunning relation between said wall panel portions and intermediate and spaced from the longitudinal sides of said wall panel portions, and wherein said fastener assembly has two spaced coextensive webs having along confronting opposite longitudinal margins respective complementary resiliently flexible fastener profile sets which are separably interlocked and with substantial width areas of the webs intervening between the profiles on each of the webs and the webs having respective oppositely facing base surfaces;
- permanently securing each of said web areas into a laminate with the respective subjacent of said wall panel portions;
- and slitting said laminates longitudinally along respective substantially offset lines and thereby providing two bag making strips having differential length pull flanges along said fastener sets.
1 more element
A method of making multiple reclosable bag material, comprising:
- advancing from a supply source bag wall film in the form of a collapsed tubular plastic extrusion wherein the collapsed extrusion provides colinear wall panel portions with surfaces facing toward one another;
- slitting one of said wall panel portions along a longitudinal line intermediate the opposite edges of said one panel portion;
- separating margins of said one panel portion along said slit to provide a longitudinal opening;
- feeding a continuous length of double separable fastener assembly from a supply source through said longitudinal opening into corunning relation between said wall panel portions;
- returning said one panel portion along said slit into coplanar relation and with the edges along said slit in edge-to-edge relation;
- and permanently securing to said wall panel portion surfaces oppositely facing base surfaces of said fastener assembly.
3 more elements
A method of making multiple reclosable bag material, comprising:
- advancing from a supply source bag wall film in a continuous ribbon of collapsed tubular film extrusion having opposite edges and wherein the collapsed tubular extrusion provides confronting colinear wall panel portions with surfaces facing toward one another;
- slitting one edge of the collapsed extrusion to provide an entrance into the collapsed extrusion;
- feeding a continuous length of double separable fastener assembly from a supply source laterally through said entrance and then diverting the continuous length into corunning longitudinal relation between and in intermediate position between said wall panel portions;
- permanently securing to said wall panel portion surfaces oppositely facing base surfaces of said fastener assembly;
- and sealing said slit side edge closed downstream from said diverting of said fastener assembly.
2 more elements
A multiple reclosable bag material, comprising:
- bag wall film in a continuous ribbon and providing confronting colinear wall panel portions with surfaces facing toward one another and of a width sufficient to provide two continuous bag strip sections;
- a continuous length of double separable fastener assembly in colinear relation between said wall panel portions and intermediate and spaced from the longitudinal sides of the wall panel portions;
- said fastener assembly having two coextensive webs which carry along confronting opposite longitudinal margins respective complementary resiliently flexible fastener profile sets which are separably interlocked and with substantial width areas of the webs intervening between the profile carrying margins on each of the webs and having respective oppositely facing base surfaces;
- said web base surfaces being respectively in laminar relation to said facing surfaces on superjacent parts of the bag wall film panel portions;
- and only intermediate areas of the webs being permanently secured into a laminate with superjacent parts of said wall panel portions and the profile carrying marginal portions of each of the webs being free from the panel portion surfaces;
- so that the laminate is adapted to be longitudinally separated between and spaced from the fastener profile sets into separate bag making strips wherein each of the strips will have thereon one of said fastener profile sets and each strip will be provided with multi-layer pull flanges formed from said laminate and with both of the fastener carrying margins free from the panel portion surfaces on both wall panel portions of each strip.
3 more elements
Dependencies are inferred from the claim text.