Flexible package and method of making the same

• US 9,850,036 B2
• Filed: 10/25/2013
• Issued: 12/26/2017
• Est. Priority Date: 10/26/2012
• Status: Active Grant

• Current Assignee: PrimaPak, LLC
• Original Assignee: Clear Lam Packaging Incorporated (Sonoco Products Company)
• Inventors: Sanfilippo, James J., Sanfilippo, John E., Skaggs, Jeanne M., Soria, Francisco Javier, Radenovic, Milorad, Wyslotsky, Bohdan, Georgelos, Paul, Montefusco, Pat, Speer, Roy, Forowycz, Roman
• Primary Examiner(s): Battisti, Derek
• Application Number:
  US14/064,108
• Publication Number:
  US 20140185962A1
• Time in Patent Office: 1,523 Days
• Field of Search: 383200, 383203, 383205, 383207, 383210, 383211
• CPC Class Codes: B31B 2155/00 Flexible containers made from webs
• CPC Class Codes: B31B 2160/20 with structural provision for thickness of contents
• CPC Class Codes: B31B 2170/20 having multi-layered walls, e.g. laminated or lined
• CPC Class Codes: B31B 70/00 Making flexible containers, e.g. envelopes or bags
• CPC Class Codes: B31B 70/60 Uniting opposed surfaces or edges; Taping
• CPC Class Codes: B65B 61/184 by applying tabs over discharge openings, e.g. over discharge openings defined by tear or score lines
• CPC Class Codes: B65B 9/22 Forming shoulders; Tube formers
• CPC Class Codes: B65D 33/16 End- or aperture-closing arrangements or devices valves of valve bags B65D31/14 ; removable stoppers or caps B65D39/00, B65D41/00; closures of filled bags B65D77/10; closing filled bags in association with packaging B65B7/00, B65B51/00
• CPC Class Codes: B65D 5/4266 Folding lines, score lines, crease lines
• CPC Class Codes: B65D 75/5838 combined with separate fixed tearing means, e.g. tabs

Abstract

A flexible, stackable, recloseable container for storing a quantity of products comprising a plurality of walls defined by a first sheet and a second sheet attached to at least a portion of the first sheet. The second sheet extends over at least three of the walls. The opposing container walls each have a sealed portion and one or more tucks, the tucks comprising a portion of the first sheet tucked toward the interior volume. A portion of the second sheet defines a recloseable feature located over an opening for reclosing the container. The second sheet includes a line of reduced strength at or adjacent at least a boundary adjacent the tucks and disposed between the opposing container walls each having the sealed portion and an adjacent container wall. The second sheet can include a hinge about which the recloseable feature pivots from closed position to open position.

Claims

1. A flexible container comprising:

a plurality of walls that cooperate to define an interior volume, the plurality of walls being defined by a first sheet, wherein the plurality of walls comprises;

opposed side walls each having a seal disposed along a portion of the side wall and one or more tucks, the tucks each comprising a portion of the first sheet tucked toward the interior volume and disposed at least partially under the seal,

at least one wall defining an opening panel comprising at least a portion of an opening for accessing the interior volume,

a second sheet attached to at least a portion of the first sheet, the second sheet at least partially extending over at least three of the plurality of walls, wherein each of the at least three of the plurality of walls is adjacent to at least one of the other at least three plurality of walls, one of the at least three of the plurality of walls is the at least one wall defining the opening panel and a portion of the second sheet defines a resealable flap disposed over the opening for resealable closure of the container, one of the at least three of the plurality of walls is a side wall, the second sheet extends over boundaries between adjacent ones of the at least three of the plurality of walls and a portion of the second sheet extends into at least one tuck, and the second sheet includes a line of reduced strength at or adjacent to the boundary between the side wall and the adjacent one of the at least three plurality of walls, wherein the at least one wall defining the opening panel includes four corners defined by the first sheet, the second sheet includes apertures in portions of the second sheeting extending across the corners such that the corner extends through the aperture.

2. The flexible container of claim 1, wherein the second sheet includes lines of reduced strength at each of the boundaries between adjacent ones of the at least three of the plurality of walls.

3. The flexible container of claim 1, wherein the second sheet has a thickness of 10 mils or less, the line of reduced strength comprises one or both of perforations having at least 10% cut openings, score lines extending at least 10% into the thickness of the second sheet.

4. The flexible container of claim 1, wherein the second sheet has thickness greater than 10 mils wherein at least one of the lines of reduced strength comprises one or both of perforations having at least 50% cut openings, score lines extending at least 50% into the thickness of the second sheet.

5. The flexible container of claim 1, wherein:

the at least three of the plurality of walls comprise the at least one wall defining an opening panel, one of the side walls, and a third wall adjacent to the at least one wall defining the opening panel,

the second sheet extends across the at least one wall defining the opening panel and over a first boundary disposed between the at least one wall defining the opening panel and the side wall,

the second sheet having a portion that extends into the tucks of the side wall,

the second sheet further extends over a second boundary disposed between the at least one wall defining the opening panel and the third wall,

the second sheet extends at least partially over the third wall,

the second sheet includes a first line of reduced strength at or adjacent to the first boundary, and

the second sheet includes a second line of reduced strength at or adjacent to the second boundary.

6. The flexible container of claim 5, wherein the first and second lines of reduced strength comprise perforations and the first line of reduced strength has a greater percentage of cut opening than the second line of reduced strength.

7. The flexible container of claim 5, wherein the first line of reduced strength has about 50% to about 100% cut openings, and the second line of reduced strength has about 1% to about 50% cut openings.

8. The flexible container of claim 7, wherein the first and second line of reduced strength comprise score lines and the first line of reduced strength has score lines that extend more deeply into the thickness of the second sheet than the second line of reduced strength.

9. The flexible container of claim 8, wherein the first line of reduced strength comprises a score line extending about 50% to about 100% into the thickness of the second sheet and the second line of reduced strength extends about 1% to about 50% into the thickness of the second sheet.

10. The flexible container of claim 5, wherein the third wall is adjacent to the side wall, the second sheet extends over a third boundary disposed between the third wall and the side wall, and the second sheet includes a third line of reduced strength at or adjacent to the third boundary.

11. The flexible container of claim 10, wherein the second sheet has a thickness of less than 10 mils, and the third line of reduced strength comprises perforations having about 1% to about 60% cut openings and/or score lines that extend about 1% to about 60% into the thickness of the second sheet.

12. The flexible container of claim 10, wherein the second sheet has a thickness of greater than 10 mils, and the third line of reduced strength comprises perforations having about 50% to about 100% cut openings and/or score lines that extend about 50% to about 100% into the thickness of the second sheet.

13. The flexible container of claim 10, wherein the third line of reduced strength is substantially linear and an edge of the container defined at the third boundary is substantially linear.

14. The flexible container of claim 10, wherein the third line of reduced strength is curved, thereby defining an edge of the container disposed at the third boundary to have a curvature corresponding to the curve of the third line of reduced strength.

17. The flexible container of claim 10, wherein the third line of reduced strength has substantially same cut opening percentage as the first line of reduced strength, and or the penetration of one or more score lines of the third line of reduced strength is substantially equal to the penetration of one or more score lines of the first line of reduced strength.

18. The flexible container of claim 5, wherein the first boundary extends between first and second corners, and the second sheet includes apertures at each of the first and second corners.

19. The flexible container of claim 1, wherein the second sheet further comprises a hinge defined by a line of reduced strength, the hinge is disposed at an end of the resealable flap, and the resealable flap is pivotable about the hinge from a closed position in which the resealable flap is in contact with the opening panel to resealable close the opening, and an open position in which the resealable flap is pivoted away from the opening panel.

20. The flexible container of claim 1, wherein the second sheet further comprises first and second projections disposed at an end of the resealable flap, the first and second projections being pivotable from a first position in which the first and second projections are in the same plane as at least one wall defining the opening panel and the resealable flap is in a closed position, and a second position in which the first and second projections are oblique to the at least one wall defining the opening panel and the resealable flap is in an open position.

21. The flexible container of claim 20, wherein the second sheet further comprises a hinge about which the resealable flap pivots from the closed position to the open position and the first and second projections are disposed on opposed sides of the hinge.

22. The flexible container of claim 20, wherein the first and second projections are disposed equidistant from the hinge.

23. The flexible container of claim 20, wherein the first and second projections have a semi-circular shape.

24. The flexible container of claim 1, wherein the resealable flap comprises a pull tab for gripping the resealable flap.

25. The flexible container of claim 24, wherein the pull tab is disposed adjacent a boundary between adjacent walls and the pull tab is spaced about 0.03 inches to about 0.1 inches from a line of reduced strength at or adjacent the boundary adjacent to the pull tab.

26. The flexible container of claim 24, wherein the pull tab extend up to or past the line of reduced strength at or adjacent the boundary adjacent the pull tab.

27. The flexible container of claim 1, wherein at least one of the first and second seals is attached to the sidewall.

28. The flexible container of claim 1, wherein at least one of the first and second seals extends substantially perpendicularly to the sidewall and comprises a gripping aperture in a portion of the seal to define a handle.

29. The flexible container of claim 1, wherein the second sheet has a thickness of about 2 mils to about 30 mils.

30. The flexible container of claim 1, wherein at least one of the plurality of walls defines a bottom wall of the container upon which the flexible container stands, and the bottom wall comprises a corner seal.

31. The flexible container of claim 30, wherein the at least one of the plurality of walls defining the opening panel is adjacent to the bottom wall, the opening comprises a pull tab at an end, and the pull tab is disposed adjacent to the corner seal.

32. The flexible container of claim 30, wherein the at least one of the plurality of walls defining the opening panel is opposite the bottom wall.

33. The flexible container of claim 1, wherein at least one of the plurality of walls defines a bottom wall of the container upon which the flexible container stands, and a third sheet is attached to the first sheet at the bottom wall.

34. The flexible container of claim 1, wherein the opening extends across at least two adjacent ones of the plurality of walls.

15. A flexible container comprising:

a plurality of walls that cooperate to define an interior volume, the plurality of walls being defined by a first sheet, wherein the plurality of walls comprises;

a first side wall and an opposed second side wall, each of the first and second side walls having a seal disposed along a portion of the side wall and one or more tucks, the tucks each comprising a portion of the first sheet tucked toward the interior volume and disposed at least partially under the seal,

at least one wall defining an opening panel comprising at least a portion of an opening for accessing the interior volume,

a second sheet attached to at least a portion of the first sheet, the second sheet at least partially extending over at least three of the plurality of walls, wherein;

each of the at least three of the plurality of walls is adjacent to at least one of the other at least three plurality of walls, and the at least three of the plurality of walls comprises the at least one wall defining an opening panel, the first side wall, and a third wall adjacent to the at least one wall defining the opening panel,

a portion of the second sheet defines a resealable flap disposed over the opening for resealable closure of the container,

the second sheet extends across the at least one wall defining the opening panel and over a first boundary disposed between the at least one wall defining the opening panel and the first side wall,

a portion of the second sheet extends into at least one tuck,

the second sheet includes a first line of reduced strength at or adjacent to the first boundary,

the second sheet further extends over a second boundary disposed between the at least one wall defining the opening panel and the third wall,

the second sheet extends at least partially over the third wall,

the second sheet includes a second line of reduced strength at or adjacent to the second boundary,

the third wall is adjacent to the first side wall, the second sheet extends over a third boundary disposed between the third wall and the first side wall,

the second sheet includes a third line of reduced strength at or adjacent to the third boundary,

the third line of reduced strength is curved, thereby defining an edge of the container disposed at the third boundary to have a curvature corresponding to the curve of the third line of reduced strength, and

a portion of the second sheet extending into the first side wall from the third boundary comprises a contouring line of reduced strength that is a mirror image of the third line of reduced strength.

16. The flexible container of claim 15, wherein the contouring line of reduced strength comprises perforations having substantially the same cut opening percentage as the third line of reduced strength and/or the contouring line of reduced strength comprises score lines having substantially same percentage of penetration as score lines of the third line of reduced strength.

35. A method of forming a sealable package, comprising:

providing a web comprising a first sheet having a second sheet attached to a portion of the first sheet, the first sheet comprising an opening defined therein; and

folding the web to define a plurality of walls that cooperate to define an interior volume of the container, the interior volume being accessible through the opening;

sealing edges of the web to define first and second seals thereby defining the first and second side walls,

wherein;

the plurality of walls comprises;

opposed first and second side walls having first and second seals, respectively, disposed along a portion of the side wall and a tuck portion, the tuck portion comprising a portion of the first sheet tucked toward the interior volume and disposed at least partially under the seal,

at least one wall defining an opening panel comprising at least a portion of the opening,

the second sheet at least partially extends over at least three of the plurality of walls, wherein each of the at least three of the plurality of walls is adjacent to at least one of the other at least three plurality of walls, one of the at least three of the plurality of walls is the at least one wall defining the opening panel and a portion of the second sheet defines a resealable flap disposed over the opening for resealable closure of the container, one of the at least three of the plurality of walls is a side wall, the second sheet extends over boundaries between adjacent ones of the at least three of the plurality of walls and a portion of the second sheet extends into at least one tuck, and the second sheet includes a line of reduced strength at or adjacent to a boundary between the side wall and the adjacent one of the at least three plurality of walls, wherein the at least one wall defining the opening panel includes four corners defined by the first sheet, the second sheet includes apertures in portions of the second sheeting extending across the corners such that the corner extends through the aperture.

36. The method of claim 35, wherein the web is folded about a forming tube, the forming tube comprises an outward extension on at least one side and a plate for creasing the web about the outward extension.

37. The method of claim 35, the method further comprising folding over at least one of the first and second seals and attaching the seal to the respective sidewall.

38. The method of claim 37, wherein folding over the at least one of the first and second seals comprises disposing the package in a holder having a size and shape corresponding to the flexible container, actuating a first plate against a portion of the side wall, not including the seal, and actuating a second plate against a remaining portion of the side wall including the seal, the second plate disposing the seal against the side wall to attach the seal to the side wall.