Flexible, stackable container including a lid and package body folded from a single sheet of film

• US 8,066,137 B2
• Filed: 08/08/2008
• Issued: 11/29/2011
• Est. Priority Date: 08/08/2007
• Status: Active Grant

• Current Assignee: PrimaPak, LLC
• Original Assignee: Clear Lam Packaging Incorporated (Sonoco Products Company)
• Inventors: Speer, Roy, Sanfilippo, James J., Sanfilippo, John E., Skaggs, Jeanne M.
• Primary Examiner(s): Pickett; J. Gregory
• Assistant Examiner(s): WALKER, NED ANDREW
• Application Number:
  US12/188,328
• Publication Number:
  US 20090039078A1
• Time in Patent Office: 1,208 Days
• Field of Search: 220/6, 220/270, 229/125.05, 229/125.09, 229/125.13, 229/125.15, 229/125.17
• US Class Current: 220/6
• CPC Class Codes: B65B 1/06 by gravity flow
• CPC Class Codes: B65B 2220/12 Creating additional longitudinal welds on horizontal or vertical form fill seal [FFS] machines for stiffening packages or for creating package edges
• CPC Class Codes: B65B 2220/18 the primary packaging being bags the subsequent secondary packaging being rigid containers, e.g. cardboard box
• CPC Class Codes: B65B 51/144 Closing paperboard containers
• CPC Class Codes: B65B 61/02 for perforating, scoring , slitting, or applying code or date marks on material prior to packaging scoring ampoules B65B3/006
• CPC Class Codes: B65B 61/186 by applying or incorporating rigid fittings, e.g. discharge spouts
• CPC Class Codes: B65B 61/202 for attaching articles to the outside of a container B65B61/205 takes precedence
• CPC Class Codes: B65B 61/24 for shaping or reshaping completed packages
• CPC Class Codes: B65B 61/28 for discharging completed packages from machines
• CPC Class Codes: B65B 7/06 by collapsing mouth portion, e.g. to form a single flap
• CPC Class Codes: B65B 9/20 the webs being formed into tubes in situ around the filling nozzles
• CPC Class Codes: B65B 9/2042 Means for altering the cross-section of the tube filling opening prior to transversal sealing, e.g. tube spreading devices subdividing filled tubes to form two or more packages by sealing involving displacement of contents B65B9/12
• CPC Class Codes: B65D 75/008 Standing pouches, i.e. "Standbeutel"
• CPC Class Codes: B65D 75/5877 connected to a planar surface of the package wall

Abstract

A flexible, stackable container for storing a quantity of a product may include a sealed package formed from a single sheet of film and retaining the quantity of the product disposed therein, and a lid fitment attached to a first side of the package. The first side of the package may have an outer first surface of the film and outwardly extending first corner seals formed in the film at the edges of the first side and surrounding the first side of the package. The package may also have a second side disposed opposite the first side and outwardly extending second corner seals formed in the film at the edges of the second side and surrounding the second side of the package. The lid fitment may include a base having a central opening and a lid having a complimentary shape to the base to form a seal therebetween when the lid is closed down onto the base. The base may be sealed to one of the first surface of the first side, to the first corner seals surrounding the first side, or to both, such that a portion of the first surface is accessible from the exterior of the container when the lid is separated from the base of the lid fitment.

Claims

1. A flexible, stackable container that is used for storing a quantity of a product and has:

a sealed package that;

(i) is formed from a single sheet of film that has oppositely disposed lateral edges and oppositely disposed leading and trailing edges, the sheet of film being wrapped inwardly with portions of the film proximate the lateral edges being sealed to each other;

(ii) has at least three folds in the film that are parallel to the lateral edges of the film and forms corners that define opposite edges of top, bottom, front, and back panels of the package;

(iii) has secondary folds in the film that are parallel to the at least three folds and bring an inner surface of the top and bottom panels into contact with corresponding portions of an inner surface of the front and back panels, the contacting inner surfaces being sealed and forming corner seals that extend outwardly from and border more than two sides of both the top and bottom of the package;

(iv) has front and rear side portions of the leading edge of the film that are sealed together with inner surfaces of the film proximate thereto forming a leading seal that is folded over and attached to corresponding portions of an outer surface of the package, forming a portion of one lateral side of the container, said lateral side portion thereby comprising two layers of film; and

(v) has front and rear side portions of the trailing edge of the film that are sealed together with inner surfaces of the film proximate thereto forming a trailing seal that is folded over and attached to corresponding portions of an outer surface of the package, forming a part of an opposed lateral side of the container, the package being sealed once, the leading seal, the trailing seal, and the seal between the portions of the film proximate the lateral edges are formed; and

,

a lid fitment that;

(i) is attached to one of the sides of the package that have the corner seals;

(ii) has a base that has a central opening; and

(iii) has a lid that has a shape that is complementary to the shape of the base and seals down onto the base, wherein a portion of the surface of the package is accessible from the exterior of the container when the lid is separated from the base of the lid fitment.

2. The flexible, stackable container of claim 1, wherein a quantity of produce is deposited in the package after one of the leading seal and the trailing seal are formed and before the other of the leading seal and the trailing seal are formed.

3. The flexible, stackable container of claim 1, wherein the corner seals extend outwardly perpendicular to the top of the package.

4. The flexible, stackable container of claim 1, where the base of the lid fitment is heat sealed to the top of the package or the corner seal that borders more than two sides of the top.

5. The flexible, stackable container of claim 1, wherein the lid fitment comprises a living hinge connecting the lid to the base.

6. The flexible, stackable container of claim 1, wherein the base of the lid fitment is sealed to the corner seals that border more than two sides of the top.

7. The flexible, stackable container of claim 1, wherein the base of the lid fitment has a bottom surface surrounding the central opening of the base, and wherein the bottom surface of the base is sealed to the top surface of the top of the package.

8. The flexible, stackable container of claim 1, wherein the package is hermetically sealed to retain the product disposed therein.

9. The flexible, stackable container of claim 1, wherein the container is sealed to retain the product disposed in the package when a portion of the first surface is penetrated to expose the interior of the package and the lid is closed down onto the base of the lid fitment.

10. The flexible, stackable container of claim 1, wherein the lid of the lid fitment comprises an outer wall extending around the perimeter of the lid and having an upper edge, and a central raised portion within the outer wall and extending upwardly with a top surface of the central raised portion being higher than the upper edge of the outer wall.

11. The flexible, stackable container of claim 10, wherein the top surface of the central raised portion is approximately one-eighth inch above the upper edge of the outer wall.

12. The flexible, stackable container of claim 1, wherein the lid of the lid fitment comprises an outer wall extending around the perimeter of the lid and having an upper edge, and a rim extending upwardly from the upper edge of the outer wall with an outer edge of the rim being disposed inwardly from an outer edge of the outer wall.

13. The flexible, stackable container of claim 12, wherein the outer edge of the rim is disposed approximately one-eighth inch inwardly from the outer edge of the outer wall.

14. The flexible, stackable container of claim 12, wherein the rim extends approximately one-eighth inch upwardly from the upper edge of the outer wall.

15. The flexible, stackable container of claim 1, wherein the top panel has a flap defined by a line of reduced strength in the film forming the top surface such that the line of reduced strength yields to separate the flap from the top surface when a force is applied to the top surface.

16. The flexible, stackable container of claim 15, wherein the line of reduced strength is a continuous score line through the top surface of the film.

17. The flexible, stackable container of claim 15, wherein the line of reduced strength is a series of alternating score lines having 100% penetration through the film and bridge portions having less than 100% penetration through the film.

18. The flexible, stackable container of claim 15, wherein the line of reduced strength defines three sides of the flap such that the flap does not completely detach from the package when the flap detaches from the film at the line of reduced strength.

19. The flexible, stackable container of claim 15, wherein the line of reduced strength comprises a series of perforations through the top surface of the film.

20. The flexible, stackable container of claim 19, wherein the perforations extend approximately 50% of the distance through the thickness of the film.

21. The flexible, stackable container of claim 19, wherein the distance the perforations extend through the film is in the range of 40% to 60% of the thickness of the film.

22. The flexible, stackable container of claim 19, wherein the perforations extend 100% of the distance through the film and through the inner surface of the film.

23. The flexible, stackable container of claim 15, comprising a pull tab attached to the outer surface of the flap and having a gripping portion that is grasped by a user, wherein the pull tab is attached to the flap such that the flap detaches from the film along the line of reduced strength before the pull tab detaches from the flap when the gripping portion is pulled by a user.

24. The flexible, stackable container of claim 23, wherein the perimeter of the pull tab extends beyond the perimeter of the flap.

25. The flexible, stackable container of claim 24, wherein the perimeter of the pull tab has a pressure sensitive adhesive disposed on a surface thereof to reattach the perimeter of the pull tab to the top panel to reclose the package after the flap is detached from the top surface.