Integral extruded construction for bags (4191230)

Inventors:
Steven Ausnit
Company:
Minigrip, Inc.
Issued Date:
1980-03-04
Tags:
bag body

Abstract

A plastic extruded bag construction comprises a unitary one piece plastic extrusion including a thin wall plastic closure web area which may serve as a gussett normally extending into the bag and adapted to be projected from the mouth of the bag as a pouring spout. Pull flange portions of substantial length all in one piece in the extrusion together with the closure web have proximal ends joined respectively to opposite sides of the closure web area. Separable resiliently flexible interlocking complementary fastener profiles integral in one piece in the extrusion with the closure web area and the pull flange portions adjacent to the proximal ends of the pull flange portions are arranged to be interlockingly separably coupled together and separated by manipulation of the pull flange portions and flexing of the closure web area. A bag body has side wall panels with end parts thereof joined to the extrusion adjacent to the profiles whereby the closure web provides a closure for the bag inwardly from the fastener profiles and which closure must be ruptured to gain access into the bag. Several embodiments are disclosed. [USPTO]

Claims

I claim as my invention:

1. A plastic extruded bag construction, all of the following named parts of which are in a unitary one-piece plastic extrusion including:

a thin-wall plastic closure web area;

pull flange portions of substantial length having their lower proximal ends joined respectively to opposite ends of said closure web area, with said pull flange portions arranged to extend upwardly at respectively opposite sides of a bag mouth at the top of the bag;

separable interlocking complementary fastener profiles adjacent to said proximal ends of said pull flange portions and arranged to be interlockingly separably coupled together and separated by manipulation of said pull flange portions;

said closure web area being collapsed and extending inwardly into the bag clear of the coupled fastener profiles;

and a bag body having bag wall panels with the upper ends thereof joined with the rest of the extrusion adjacent to the profiles whereby the closure web area provides a closure across the bag mouth inwardly from the fastener profiles and which closure must be ruptured to gain access into the bag body.

2. A bag construction according to claim 1, wherein said closure web area comprises an infolded gusset which extends inwardly into the bag to a length sufficient to enable the gusset to be extended from the bag outwardly between said pull flanges to serve as a pouring funnel.

3. A bag construction according to claim 1, wherein said lower proximal ends of said pull flange portions are joined in coincident integral extrusion in a common one piece juncture with said upper ends of said side wall panels and also with upper end portions of said closure web area.

4. A bag construction according to claim 1, wherein said bag body comprises a continuous one piece folded web structure to provide said bag wall panels.

5. A plastic extruded bag construction according to claim 1, wherein said fastener profiles are located on said pull flange portions.

6. A plastic extruded bag construction according to claim 1, wherein said fastener profiles are located as integral plastic extrusions on said closure web area adjacent to lower proximal ends of said pull flange portions and below where the upper ends of said wall panels are joined in the extrusion.

7. A unitary one piece extruded bag construction, having:

a collapsed thin flexible plastic extruded web having an area thereof infolded into a gusset along parallel folds which join opposite ends of said gusset to bag wall panels, and said gusset being adapted to provide a bag closure which may be opened to enable pouring of contents from the bag;

a respective flange connected integrally in one coincidentally extruded piece with and projecting outwardly along each of said folds and adapted to serve as bag opening flanges;

complementary separably interlockable fastener profile means in a coincidentally extruded one piece connection with and on the opposite faces of the flanges;

and said bag wall panels being substantially longer than said gusset.

8. A construction according to claim 7, wherein said folded gusset is seal formed into a generally triangular funnel pouring spout element.

9. A construction according to claim 7, wherein said extrusion comprises an originally tubular extrusion and said infolded gusset comprises about one-third of the circumferential area of the tubular extrusion before it is collapsed, said wall panels of the collapsed extrusion forming walls between which said infolded gusset.

10. A construction according to claim 7, wherein said extruded web comprises a generally flat extruded sheet and said infolded gusset is located between substantial length bag wall panel portions of the web collapsed onto the gusset.

11. A plastic extruded bag construction, comprising:

a unitary one-piece plastic extrusion including a thin-wall plastic closure web area, and pull flange portions of substantial length having their lower proximal ends joined respectively to the opposite ends of said closure web area, said pull flange portions arranged to extend upwardly at respectively opposite sides of a bag mouth at the top of the bag;

separable interlocking complementary fastener profiles fixed on said extrusion adjacent to proximal ends of said pull flange portions and arranged to be interlockingly separably coupled together and separated by manipulation of said pull flange portions;

a bag body having side wall panels with upper end parts which are secured in laminar relation to the outer faces of said pull flange portions so that the pull flange portions and said upper end parts of the wall panels together form double thickness pull flanges for the bag wherein the closure web area provides a closure across the bag mouth and which closure must be ruptured to gain access into the bag body;

said unitary one-piece plastic extrusion being of tubular form and having said fastener profiles integrally extruded in one-piece on the inside of the tubular form with said pull flange portions extending above said profiles and having their upper ends joined by a top fold;

said closure web area extending downwardly from the fastener profiles and having at the lower end thereof a closed fold;

and said bag body wall panels having upper ends joined in a common extruded joint with one another and overlying the joined upper ends of said pull flange portions.

12. A plastic extruded bag construction made from a plurality of unitary plastic extrusions, comprising:

a first unitary plaastic extrusion including a thin-wall plastic closure web area, and pull flange portions of substantial length having their lower proximal ends joined respectively to the opposite ends of said closure web area, said pull flange portions arranged to extend upwardly at respectively opposite sides of a bag mouth at the top of the bag;

separable interlocking complementary fastener profiles fixed on said first extrusion adjacent to proximal ends of said pull flange portions and arranged to be interlockingly separably coupled together and separated by manipulation of said pull flange portions;

a second unitary plastic extrusion providing a bag body having side wall panels with upper end parts which are secured in laminar relation to the outer faces of said pull flange portions so that the pull flange portions and said upper end parts of the wall panels together form double thickness pull flanges for the bag wherein the closure web area provides a closure across the bag mouth and which closure must be ruptured to gain access into the bag body;

said first unitary plastic extrusion comprising a flattened collapsed tubular extrusion having said fastener profiles extruded integrally in one piece on the inside of said extrusion;

and said bag body comprising a larger tubular extrusion which envelops said first tubular extrusion.

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