Open-top container with laminated end panels

• US 5,575,419 A
• Filed: 08/24/1995
• Issued: 11/19/1996
• Est. Priority Date: 08/24/1995
• Status: Expired due to Fees

• Current Assignee: Riverwood International Corporation
• Original Assignee: Riverwood International Corporation
• Inventors: Fogle, James C., Ross, John A.
• Primary Examiner(s): Elkins, Gary E.
• Application Number:
  US08/518,694
• Time in Patent Office: 453 Days
• Field of Search: 229/23 R, 229/109, 229/110, 229/915, 229/916, 229/919, 229/199, 220/416, 206/509, 206/511, 206/512
• US Class Current: 229/122.21
• CPC Class Codes: B65D 11/10 of polygonal cross-section and all parts being permanently connected to each other B65D11/18 takes precedence
• CPC Class Codes: B65D 11/1893 with semidetachable components, i.e. with some side walls hinged to each other or to a base panel and the other side walls being detachable to allow collapsing of the container
• CPC Class Codes: B65D 21/0215 Containers with stacking feet or corner elements B65D21/0211, B65D21/023 take precedence
• CPC Class Codes: B65D 5/003 having ledges formed by extensions of the side walls B65D5/0045 and B65D5/0065 take precedence
• CPC Class Codes: B65D 5/323 and two further opposed body panels formed from two essentially planar blanks
• CPC Class Codes: B65D 5/443 Integral reinforcements, e.g. folds, flaps double walls B65D5/02
• CPC Class Codes: Y10S 229/916 Means for ventilating while stacked
• CPC Class Codes: Y10S 229/919 Reinforced wall

Abstract

A container formed by wrapping a slotted flexible sheet about rigid end panels having upper corner projections that extend through the slots. The end panels are formed from a blank having end flaps which are folded and adhered to the main body of the blank to provide double thickness at the end portions. Additional reinforcement may be provided by a reinforcing flap connected to the main body or by a stiffener insert. Stacking projections on the end panels extend through slots in the flexible sheet to maintain the sheet in place.

Claims

1. In a container comprised of:

two spaced, substantially parallel, relatively rigid end panels;

each end panel having two spaced upper corner areas and two upwardly extending projections, each projection being inwardly spaced from one of the upper corner areas;

a flexible sheet forming bottom and side panels extending between the end panels;

each side panel including an upper inwardly sloped portion;

the upper corner areas of the end panels extending through slots in the upper sloped portions; and

means for securing end portions of the flexible sheet to associated of said end panel projections;

the improvement comprising;

each end panel having a main body portion and foldably connected end flaps adhered to end sections of the main body portion, the end sections and the adhered end flaps forming a two-ply structure;

the projections of each end panel being of two-ply construction, one of the plies of the projections of each end panel being comprised of projections extending upwardly from the end sections of the main body portion and the other ply of the projections of each end panel being comprised of projections extending upwardly from the end flaps.

2. The improvement of claim 1, wherein both the end sections of the main body portion of each end panel and the end flaps connected thereto include lower corner areas and aligned recesses inwardly spaced from the lower corner areas, the recesses being located opposite associated of said end panel projections.

3. In a container comprised of:

two spaced, substantially parallel, relatively rigid end panels;

each end panel having two spaced upper corner areas and two upwardly extending projections, each projection being inwardly spaced from one of the upper corner areas;

a flexible sheet forming bottom and side panels extending between the end panels;

each side panel including an upper inwardly sloped portion;

the upper corner areas of the end panels extending through slots in the upper sloped portions; and

means for securing end portions of the flexible sheet to associated of said end panel projections;

the improvement comprising;

each end panel having a main body portion and foldably connected end flaps adhered to end sections of the main body portion, the end sections and the adhered end flaps forming a two-ply structure;

the projections of each end panel being of single-ply construction, the single ply being comprised of projections extending upwardly from the end flaps.

4. The improvement of claim 3, wherein the end sections of the main body portion of each end panel and the end flaps connected thereto include lower corner areas, the end flaps including recesses inwardly spaced from the lower corner areas and being located opposite associated of said end panel projections, the end sections of the main body portion of each end panel being devoid of recesses aligned with the recesses in the end flaps.

5. In a container comprised of:

two spaced, substantially parallel, relatively rigid end panels;

each end panel having two spaced upper corner areas and two upwardly extending projections, each projection being inwardly spaced from one of the upper corner areas;

a flexible sheet forming bottom and side panels extending between the end panels;

each side panel including an upper inwardly sloped portion;

the upper corner areas of the end panels extending through slots in the upper sloped portions; and

means for securing end portions of the flexible sheet to associated of said end panel projections;

the improvement comprising;

each end panel having a main body portion and foldably connected end flaps adhered to end sections of the main body portion, the end sections and the adhered end flaps forming a two-ply structure;

the projections of each end panel being of single-ply construction, the single ply being comprised of projections extending upwardly from end sections of the main body portion.

6. The improvement of claim 5, wherein the end sections of the main body portion of each end panel and the end flaps connected thereto include lower corner areas, the end sections of the main body portion of each end panel including recesses inwardly spaced from the lower corner areas and being located opposite associated of said end panel projections, the end flaps being devoid of recesses aligned with the recesses in the end sections of the main body portion.

7. In a container comprised of:

two spaced, substantially parallel, relatively rigid end panels;

each end panel having two spaced upper corner areas and two upwardly extending projections, each projection being inwardly spaced from one of the upper corner areas;

a flexible sheet forming bottom and side panels extending between the end panels;

each side panel including an upper inwardly sloped portion;

the upper corner areas of the end panels extending through slots in the upper sloped portions; and

means for securing end portions of the flexible sheet to associated of said end panel projections;

the improvement comprising;

each end panel having a main body portion, foldably connected end flaps adhered to end sections of the main body portion and a reinforcement flap foldably connected to the main body portion between the projections;

the end sections, the adhered end flaps and the reinforcement flap forming a three-ply structure;

the projections of each end panel being of two-ply construction, one of the plies of the projections of each end panel being comprised of projections extending upwardly from the end sections of the main body portion and the other ply of the projections of each end panel being comprised of projections extending upwardly from the end flaps.

8. The improvement of claim 7, wherein both the end sections of the main body portion of each end panel and the end flaps connected thereto include lower corner areas and aligned recesses inwardly spaced from the lower corner areas, the recesses being located opposite associated of said end panel projections.

9. In a container comprised of:

two spaced, substantially parallel, relatively rigid end panels;

each end panel having two spaced upper corner areas and two upwardly extending projections, each projection being inwardly spaced from one of the upper corner areas;

a flexible sheet forming bottom and side panels extending between the end panels;

each side panel including an upper inwardly sloped portion;

the upper corner areas of the end panels extending through slots in the upper sloped portions; and

means for securing end portions of the flexible sheet to associated of said end panel projections;

the improvement comprising;

each end panel having a main body portion, a separate stiffener insert of substantially the same size as the main body portion and end flaps foldably connected to end sections of the main body portion, the end flaps being adhered to the stiffener insert;

the end sections, the stiffener insert and the end flaps forming a three-ply structure;

the projections of each end panel being of at least two-ply construction, one of the plies of the projections of each end panel being comprised of projections extending upwardly from the stiffener insert and the other ply of the projections of each end panel being comprised of projections extending upwardly from either the end flaps or the end sections of the main body portion.

10. The improvement of claim 9, wherein the insert and at least the end flaps or the end sections of the main body portion include lower corner areas and aligned recesses inwardly spaced from the lower corner areas, the recesses being located opposite associated of said end panel projections.

11. The improvement of claim 9, wherein the end flaps are connected to the main body of each end panel by spaced parallel fold lines, the distance between fold lines substantially corresponding to the thickness of the insert to which the end flaps are adhered.