Package assembly, in particular a returnable type package assembly

1. A package of returnable and reusable type, comprising:

a plurality of confining elements mutually assembled in a removable manner and defining a holding volume and having at least a first interfacing surface for contacting an interfacing surface of another package when two packages are (a) stacked, (b) flanked, or (c) stacked and flanked, the confining elements being effective (a) to be assembled around an item to be transported from a first location to a second location, (b) when the item reaches the second location, to be disassembled from around the item, and (c) to be subsequently reassembled around a second item to be transported from a third location to a fourth location;

grip means provided on said first interfacing surface, said grip means defining a first directrix and a second directrix, said first directrix comprising a first curvilinear stretch developing along a first path, said second directrix comprising a second curvilinear stretch developing along a second path, said first and second stretches being side by side, said first and second paths being (a) concentric circular paths or (b) concentric elliptic paths, each stretch being defined by a series of individual engagement protrusions which are separate from each other and which are spaced apart along said stretch, each engagement protrusion extending from said first interfacing surface, wherein the grip means are effective to permit a pair of said packages to be engaged via stacking or flanking and then to be lifted in engagement together without slipping relative to each other.

2. A package as in claim 1 , wherein each of said engagement protrusions has an extension axis emerging from said first interfacing surface.

3. A package as in claim 2 , wherein each of the engagement protrusions has a tapering shape along said extension axis, said tapering shape defining a frusto-conical configuration, a truncated-pyramid configuration or a partly spheroidal configuration.

4. A package as in claim 1 , wherein each of the engagement protrusions comprises self-centering means.

5. A package as in claim 4 , wherein said self-centering means are integrally formed at least on the engagement protrusions to enable mutual interfacing of the same.

6. A package as in claim 1 , wherein each of the engagement protrusions has a cylindrical shape along an extension axis emerging from said first interfacing surface.

7. A package as in claim 1 , wherein the grip means further comprises engagement recesses at least partly matching said engagement protrusions and disposed along said directrices.

8. A package as in claim 7 , wherein said engagement recesses are in an alternated sequence with the engagement protrusions.

9. A package as in claim 7 , wherein said engagement recesses are defined in a space included between two engagement protrusions.

10. A package as in claim 7 , wherein the engagement recesses have an extension axis entering said first interfacing surface consisting of a frusto-conical cavity, a cavity in the form of a truncated pyramid or a partly spheroidal cavity.

11. A package as in claim 7 , wherein the engagement recesses consist of a cylindrical cavity.

12. A package as in claim 1 , wherein the confining elements comprise:

at least one base element having a main wall with an edge; secondary walls emerging from said edge of said main wall; the grip means being formed on an outer surface of (a) said main wall, (b) said secondary walls, or (c) said main wall and said secondary walls.

13. A package as in claim 12 , wherein the base element comprises a plurality of sectors having said grip means on the main wall or on at least one secondary wall.

14. A package as in claim 13 , wherein said sectors are disposed in correspondence of the edge of the main wall.

15. A package as in claim 1 , wherein the package further comprises shock-resistant means activated into the holding volume between the package and an item contained therein.

16. A package as in claim 1 , wherein the confining elements comprise additional stiffening means.

17. A package as in claim 1 , wherein the confining elements comprise a base element and an upright.

18. The package of claim 1 , wherein each of the engagement protrusions has an at least partly spheroidal configuration.

19. The package of claim 1 , wherein the first interfacing surface is a vertical surface.

20. The package of claim 1 , wherein the first interfacing surface is a horizontal surface.

21. A package of returnable and reusable type, comprising:

a plurality of confining elements mutually assembled in a removable manner and defining a holding volume and having at least a planar vertical first interfacing surface for contacting a planar vertical interfacing surface of another package when two packages are flanked, the confining elements being effective (a) to be assembled around an item to be transported from a first location to a second location, (b) when the item reaches the second location, to be disassembled from around the item, and (c) to be subsequently reassembled around a second item to be transported from a third location to a fourth location;

grip means provided on said first interfacing surface, said grip means defining a first directrix and a second directrix, said first directrix comprising a first stretch developing along a first path, said second directrix comprising a second stretch developing along a second path, said first and second stretches being side by side, each stretch being defined by a series of individual engagement protrusions which are separate from each other and which are spaced apart along said stretch, each engagement protrusion extending from said first interfacing surface, wherein the grip means are effective to permit a pair of said packages to be engaged via flanking and then to be lifted in engagement together without slipping relative to each other.