초록 ▼

A thin wall extruded flexible web is provided with laterally spaced longitudinally extending complementary resiliently flexible interlocking fastener profiles having an imperforate gusset forming web area therebetween which is collapsibly folded into a gusset extending in one direction away from the

A thin wall extruded flexible web is provided with laterally spaced longitudinally extending complementary resiliently flexible interlocking fastener profiles having an imperforate gusset forming web area therebetween which is collapsibly folded into a gusset extending in one direction away from the profiles. Portions of the plastic web are folded into free terminal digitally manipulatable bag mouth pull flanges projecting to a suitable length in the opposite direction from the profiles, with the remainder of the plastic web being collapsed toward the gusset into bag forming side wall panels and extending to a substantially greater length than the gusset for providing a substantial bag pouch into which the gusset projects only a limited extent, with the fastener profiles being then secured together into interlocking but releasable fastener relation. Several embodiments of the method are disclosed. Apparatus for practicing the method is disclosed.

대표청구항 ▼

A method of making an integral extruded plastic bag, comprising: forming a thin wall extruded flexible plastic web; providing integrally on the plastic web longitudinally extending and laterally spaced complementary resiliently flexible interlocking fastener profiles having an imperforate gusset-for

A method of making an integral extruded plastic bag, comprising: forming a thin wall extruded flexible plastic web; providing integrally on the plastic web longitudinally extending and laterally spaced complementary resiliently flexible interlocking fastener profiles having an imperforate gusset-forming web area therebetween; collapsibly folding the gusset-forming web area into a gusset extending in one direction away from said profiles; folding portions of the plastic web into free terminal digitally manipulatable bag mouth pull flanges projecting to a suitable length in the opposite direction from said profiles; collapsing the remainder of the plastic web into bag side wall panels toward said gusset and to extend to a substantially greater length than the gusset for providing a substantial bag pouch into which the gusset projects only a limited distance; and securing the fastener profiles together into interlocking but releasable fastener relation; whereby the gusset provides a security closure for the bag which closure is adapted to be broken for discharging contents from the bag and the separable fastener profiles being than adapted for reclosing the bag.