Pocket with stress relief

Abstract

A pocket structure including a first panel, and a second panel coupled to the first panel to define a pocket with the first panel. The second panel has an opening intersecting an outer edge thereof. The opening has a transverse portion oriented generally parallel to the outer edge and a leg portion oriented generally perpendicular to the outer edge.

Claims

1. A pocket structure comprising: a first panel; a pocket panel coupled to the first panel along a first secured edge to define a pocket with the first panel, the pocket panel having a free edge extending perpendicular to the first secured edge, the free edge not coupled to the first panel; and an opening intersecting the free edge of the pocket panel and positioned at or adjacent an intersection of the first secured edge and the free edge of the pocket panel, the opening comprising: a first portion extending at an angle of greater than 60 degrees relative to the free edge; and a second portion extending from the first portion towards the first secured edge, the second portion oriented at an acute angle relative to the free edge of the pocket panel, wherein the first portion of the opening extends perpendicular relative to the free edge and parallel to the first secured edge.

2. The pocket structure of claim 1, wherein the opening further comprises a third portion extending from the second portion at an angle generally parallel to the first secured edge, the first portion being a proximal leg, the third portion being a distal leg, and the second portion being a transverse portion extending between the proximal leg and the distal leg.

3. The pocket structure of claim 1, wherein the second portion of the opening includes a first edge and a second edge, and wherein the first edge and the second edge are parallel to one another.

4. The pocket structure of claim 1, wherein the second portion of the opening has a uniform width.

5. The pocket structure of claim 1, wherein a terminal point of the opening is curved.

6. The pocket structure of claim 1, wherein the at least one free edge includes a plurality of free edges.

7. The pocket structure of claim 1, wherein the pocket panel is coupled to the first panel by sonic or heat welding.

8. The pocket structure of claim 1, wherein the pocket panel is coupled to an inner surface of the first panel.

9. The pocket structure of claim 1, wherein the acute angle is equal to or less than 30 degrees.

10. The pocket structure of claim 1, wherein second portion extends inwardly into the pocket panel from the free edge.

11. A pocket structure comprising: a first panel; a pocket panel coupled to the first panel along a first secured edge to define a pocket with the first panel, the pocket panel having a free edge extending perpendicular to the first secured edge, the free edge not coupled to the first panel; and an opening intersecting the free edge of the pocket panel and positioned at or adjacent an intersection of the first secured edge and the free edge of the pocket panel, the opening comprising: a first portion extending at an angle of greater than 60 degrees relative to the free edge; and a second portion extending from the first portion towards the first secured edge, the second portion oriented at an acute angle relative to the free edge of the pocket panel, wherein the pocket panel is additionally secured to the first panel along a second secured edge, wherein the second secured edge is parallel to the first secured edge and wherein the free edge extends between the first secured edge and the second secured edge.

12. A folder including a pocket structure, the folder comprising: a first major panel; a second major panel pivotably coupled to the first major panel along a spine; a pocket panel coupled to the first major panel along a first secured edge to define a pocket with the first major panel, the pocket panel having a free edge extending perpendicular to the first secured edge, the free edge not coupled to the first major panel; and an opening intersecting the free edge of the pocket panel and positioned at or adjacent an intersection of the first secured edge and the free edge of the pocket panel, the opening comprising: a first portion extending at an angle of greater than 60 degrees relative to the free edge; and a second portion extending from the first portion towards the first secured edge, the second portion oriented at an acute angle relative to the free edge of the pocket panel, wherein the second portion is disposed between the free edge and the first portion.

13. The folder of claim 12, wherein the opening further comprises a third portion extending from the second portion at an angle generally parallel to the first secured edge, the first portion being a proximal leg, the third portion being a distal leg, and the second portion being a central portion extending between the proximal leg and the distal leg.

14. The folder of claim 12, wherein the second portion of the opening includes a first edge and a second edge, and wherein the first edge and the second edge are parallel to one another.

15. The folder of claim 12, wherein the second portion of the opening has a uniform width.

16. The folder of claim 12, wherein a terminal point of the opening is curved.

17. The folder of claim 12, wherein the pocket panel is coupled to the first major panel by sonic or heat welding.

18. The folder of claim 12, wherein the pocket panel is coupled to an inner surface of the first major panel.

19. The folder of claim 12, wherein the acute angle is equal to or less than 30 degrees.

20. The folder of claim 12, wherein the pocket panel is additionally secured to the first major panel along a second secured edge, wherein the second secured edge is parallel to the first secured edge and wherein the free edge extends between the first secured edge and the second secured edge.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a top view of one embodiment of a binder in its open position utilizing a disclosed pocket design;

(2) FIG. 2 is a top view of the area designated Detail A in FIG. 1;

(3) FIG. 3 is a top view of the area indicated Detail B in FIG. 1;

(4) FIG. 4 is a top view of a binder in its open position utilizing another pocket design;

(5) FIG. 5 is a top view of the area designated Detail A in FIG. 4;

(6) FIG. 6 is a top view of a binder in its open position utilizing another pocket design; and

(7) FIG. 7 is a top view of the area indicated Detail A in FIG. 6.

DETAILED DESCRIPTION

(8) As shown in FIG. 1, in one embodiment the present disclosure is a folder or binder 10 having a pair of opposed major panels 12, 14. Each major panel 12, 14 is attached to opposed sides of a spine 16 that is positioned between the major panels 12, 14. In this manner, each major panel 12, 14 is independently pivotable about the spine 16 such that the binder 10 is moveable between an open position (shown in FIG. 1) wherein the major panels 12, 14 lay generally flat and co-planar, and a closed position (not shown) wherein the major panels 12, 14 are generally parallel, aligned, and face each other. If desired, a binding mechanism (such as a three-ring binding mechanism) or the like may be mounted to the spine 16 or to one of the major panels 12, 14.

(9) Generally rectangular pocket panels 18, 20 are attached to the inner surface of an associated major panel 12, 14 to define a pocket 22 therebetween. More particularly, each pocket panel 18, 20 may be securely coupled to the underlying major panel 12, 14 along two major outer edges 24, 26 thereof, for example by welding. Each pocket panel 18, 20 may be further secured to the associated major panel 12, 14 by a pair of short inwardly-extending attachment lines 28, for example by welding. Each pocket panel includes a pair of free edges 30, 32 that are not directly coupled to the associated major panel 12, 14. Each pocket 22 can be sized to receive the lower portions of eight and one-half inch by eleven inch sized papers, or can be sized to receive various other-sized papers or components therein.

(10) The major panels 12, 14, pocket panels 18, 20 and spine 16 can be made of any of a wide variety of materials, including but not limited to cardboard, paperboard, plastic (such as polypropylene or vinyl), plastic encased cardboard, etc. The pocket panels 18, 20 can be attached to the associated major panel 12, 14 by any of a wide variety of methods, such as heat welding, sonic welding, stitching, adhesives, staples, rivets or other mechanical fasteners, etc.

(11) Each free edge 30, 32 of each pocket panel 18, 20 is moveable away from the underlying major panel 12, 14 to allow any flat, paper-like objects such as papers, loose components or the like to be inserted into the pocket 22. As best shown in FIGS. 2 and 3, a stress relief feature, generally designated 38, may be located at the outer edge of each free edge 30, 32 (i.e. at or proximate to a location where a free edge 30, 32 and a secured edge 24, 26, 28 intersect). The stress relief feature 38 can be an opening, recess or cut-out (hereinafter collectively termed an opening 40) in the pocket panel 18, 20. In the illustrated embodiment, the opening 40 is generally zigzag or “z”-shaped having a pair of relatively short legs 42, 44 (a proximal leg 42 and a distal leg 44) connected by a longer transverse portion 46.

(12) In the illustrated embodiment, each leg 42, 44 extends generally or at least partially perpendicular to the adjacent free edge 30, 32, and the transverse portion 46 extends generally or at least partially parallel to the free edge 30, 32 and generally perpendicular to the legs 42, 44. In addition, in the illustrated embodiment, the transverse portion forms an acute angle (in one case between about 0 and about 30 degrees) relative to the free edge 30, 32. The distal leg 44 terminates at a terminal point 50. Each leg 42, 44 may have length that is about equal to or less than the length of the associated transverse portion 46. The transverse portion 46 is positioned between the legs 42, 44, or between the distal leg 44 and the adjacent free edge 30, 32 of the pocket 22.

(13) An opening 40 can be located at each position of each pocket 22 where a free edge 30, 32 and a secured edge 24, 26, 28 intersect. The openings 40 help to reduce stress and tearing of the pocket 22 when the pocket panel 18, 20 is pulled away from the underlying major panel 12, 14. More particularly, when the pocket panel is pulled away any stresses are guided to the terminal tip 50 of the opening 40. In addition, the applied stresses are applied in the direction of the arrow A of FIG. 3. It can be seen that there is a relatively large amount of material of the pocket panel 20 about the terminal point 50 to help accommodate the stresses at the terminal point 50. In addition, because the stress A is directed generally perpendicular to the associated free edge 32, and generally parallel to the adjacent secured edge 24, it can be seen that any tear in the pocket panel 20 can travel for a significant distance in the direction of arrow A before the tear would reach any outer edges 24, 26, 28, 30, 32 of the pocket panel.

(14) Thus, it can be seen that the proximal leg 42 of the opening 40 of FIG. 3 guides any applied stresses inwardly away from the free edge 32, the transverse portion 46 guides the stresses further inwardly away from the free edge 32 and away from the proximal leg 42. Finally, the distal leg 44 guides the stresses even further away from the free edge 32 and in a direction generally perpendicular to the free edge 32.

(15) The changes of directions, corners and terminal point 50 of the opening 40 may be curved (i.e. having a radius of at least about 0.06 inches) to avoid the presence of sharp corners which can concentrate stresses. The opening 40 may have a generally uniform width (i.e. between about 0.05 and about 0.2 inches) and may have a total length that is between about one and about ten times as long as its width. The opening 40 may extend a total distance that is less than about 1/10 of the perimeter of the pocket 22. In one embodiment the proximal leg 42 of the opening 40 can terminate in a relatively wide mouth, as shown in FIG. 2.

(16) Thus, the stress relief feature 38 allows the pocket panels 18, 20 to be pulled away from the major panel 12, 14 while reducing and minimizing tearing, and also reducing any adverse effects should any tearing occur. This provides a more durable tear-resistant pocket 22. Furthermore, the stress relief feature 38 can allow the pocket panels 18, 20 to be made of thinner and/or cheaper materials while still resisting tearing to thereby reduce the overall cost of the pocket 22.

(17) FIGS. 4 and 5 show another binder 10 with a relatively large pocket panel 56 attached to the underlying major panel 12 about three edges 58, 60, 62, for example by welding and along two short attachment lines 64, for example by welding. The pocket panel 56 is unattached along its free edge 66. A pair of stress relief features 38/openings 40 having features similar to the stress relief features 38/openings 40 described above are provided at the outer tips of the free edge 66 of the pocket panel 56.

(18) In the embodiment of FIGS. 6 and 7, the pocket panel 56 is coupled to the underlying major panel 12 about three secured edges 58, 60, 62, and the pocket panel 56 includes a free upper edge 66. In addition, a rivet 70 is located at each corner of the pocket panel 56, and extends through the pocket panel 56 and major panel 12 to securely couple the pocket panel 56 and major panel 12 together. The rivets 70 provide an extremely strong connection, but the location of the rivets 70 also provides a position of high stresses when the pocket panel 56 is pulled away from the major panel 12. A stress relief feature 38, in the form of an opening, recess or cut-out (hereinafter collectively termed an opening 72), can be positioned between each rivet 70 and the adjacent free edge 66. In the embodiment illustrated in FIGS. 6 and 7, the opening 72 is a generally “v” or “u”-shaped notch.

(19) When the pocket panel 56 is pulled away from the major panel 12, the openings 72 allow the free edge 66 to be pulled further away from the underlying panel 12 before large stresses, which can cause tearing in the pocket panel 56, are induced in the pocket panel 56. Thus the openings 72 provide a greater range of motion and direct stresses away from the rivets 70. The tip of each opening 72 may be curved, and may have a radius of at least, for example, about 0.05 inches, or at least about 0.1 inches, or at least about 0.5 inches, to help avoid or minimize tearing.

(20) The pocket design of the present invention can be used in nearly any pocket used alone or in pockets used in conjunction with or integrated into other school or office items, such as binders, notebooks, portfolios, planners, date books, insert pockets and the like. Further it should be noted that the various materials and dimensions shown in the attached drawing are illustrative of only a few embodiments of the invention, and the invention is not limited to such materials and dimensions.

(21) Having described the invention in detail and by reference to the various embodiments, it should be understood that modifications and variations thereof are possible without departing from the scope of the invention.

(22) In one embodiment, the present invention is a pocket structure including first and second generally flat, planar panels. The first panel is coupled to the second panel at least partially along at least one secured edge, and is not coupled to the second panel at least partially along at least one free edge, to define a pocket therebetween. The first panel has an opening positioned at or proximate to an intersection of the secured edge and the free edge. The opening includes a transverse portion extending generally parallel to the free edge, and a leg portion extending generally perpendicular to the free edge, wherein the transverse portion is positioned between the leg and the free edge.