Method of joining flexible fastener strips to flexible web
AssigneeMinigrip, Inc.
InventorAndre M. Herz
Life of this patent
Estimating the term…
Abstract
Extruded flexible fasteners are secured to thin plastic film by adhesive, attaining high speed production and permitting diverse materials which might not be compatible for fusion bonding to be used in the fasteners and the films, respectively.
Claims17
A method of attaching to a prefabricated flexible web a first prefabricated flexible separable plastic fastener strip having an interlocking profile projecting in a direction away from an oppositely facing interface surface area of the strip, and the profile being adapted for interlocking with a complementary second flexible separable fastener profile, comprising:
- guiding the web and the fastener strip travelling at the same high speed and continuously in operation convergently toward one another and joining said interface surface area of the fastener strip to an interface surface area of said web;
- utilizing said profile as guide means for guiding the fastener strip in movement into said convergence with said web;
- continuously in operation applying a thin layer of quickly tacky adhesive to at least one of said interface surface areas as close as practicable to the convergent joining of the web and strip so that the adhesive will reach the joining while tacky, and effecting said applying of the adhesive in a manner assuring that the adhesive will be adheringly effective on the interface area of the fastener strip directly back of and aligned with said profile;
- and pressing said strip and said web together and thereby effecting attachment of said interface surface areas to one another by means of the adhesive layer while the web and fastener strip continue travelling jointly at said high speed.
A method of attaching prefabricated flexible web and prefabricated separable fastener strips having interlocked separable profiles, comprising guiding the interlocked fastener strips as an assembly in longitudinal movement through a guide device having surfaces adapted to cooperate with the fastener strips;
- and relatively adjusting said surfaces to accommodate various widths of said fastener strips.
A method of attaching prefabricated bag making plastic film to prefabricated resiliently flexible fastener strips, comprising:
- folding a continuously travelling plastic film and guiding opposite folded panels of the film convergently toward one another and into face-to-face contiguity;
- delivering into the convergence of said panels separably interlocked fastener profile strips having oppositely facing base surfaces engaged by the respective panels;
- and applying to said base surfaces adhesive at a location in advance of engagement of said surfaces by said film panels so that the film panels are adhesively secured to the strip base surfaces at said convergence at which said interlocked fastener strips are sandwiched between said panels.
A method of attaching to a prefabricated flexible web a first prefabricated flexible separable fastener strip having an interlocking profile projecting away from a base surface area of the strip and the profile being adapted for interlocking with a complementary second flexible separable fastener profile, comprising:
- guiding the web and the fastener strip at high speed and continuously in operation convergently toward one another for joining the base surface of the fastener strip to said web;
- in advance of said joining applying adhesive means to said base surface continuously directly in back of and in alignment with said profile;
- and at said joining securing the strip by the adhesive means to the web so that bonding of the strip to the web occurs directly in aligmnent with said profile.
A method of attaching to a prefabricated flexible web prefabricated flexible separable fastener strips having separably interlocked profiles, comprising:
- moving the web and the interlocked fastener strips at high speed and continuously in operation in the same direction and adjacent to one another;
- folding said web along a longitudinal axis to form two plys and guiding the two plys convergently toward one another;
- directing said fastener strips into the convergence of said plys;
- applying adhesive to the backs of said profile strips from respective adhesive applicator nozzles which are offset relative to one another in the direction of advance of the web plys and the strips;
- and in stopping movement of said web and strips deflecting said strips and substantially removing the strips from the adhesive application field of said nozzles.
A method of attaching to a continuously moving prefabricated flexible web continuously cotravelling fastener strip means having a surface for attachment to said web, comprising:
- moving the web and fastener strip means into convergence
- applying adhesive to the moving fastener strip means from adhesive applicator means located along the path of movement of the fastener strip means;
- and effecting deflection of the strip means relative to said adhesive applicator device when stopping movement of said fastener strip means.
Dependencies are inferred from the claim text.