System and method for palletless shipment of gas cylinder arrays
A system and method are provided for palletless shipment of gas cylinder arrays. A three-dimensional array of gas cylinders is formed from a plurality of vertically-stacked two-dimensional subarrays. First elongated voids extend through the array in a width direction at a first handle elevation. Second elongated voids extend through the array in a depth direction at a second handle elevation. The first and second elongated voids are bilaterally bounded by handle portions of adjacent gas cylinders, and vertically bounded by upper and lower surfaces of surrounding cylinders. Pairs of tunnel elements are disposed within respective elongated voids and are each configured to releasably receive a corresponding forklift tong. Vertically-disposed pillars may be provided to increase the rigidity and load distribution of the system. Flaps may radiate from the pillars to minimize impact and abrasion between adjacent cylinders during shipment. Key system components may be inexpensively formed from recyclable, lightweight materials.
1. A method of packaging an array of gas cylinders for palletless shipment thereof, said method comprising:
providing a base tray element;
placing a first subarray of said gas cylinders on said base tray element, wherein said first subarray has at least three columns extending in a depth direction and at least three rows extending in a width direction, each said gas cylinder including a handle portion and an opposing foot portion;
providing a pair of first tunnel elements, each being configured to releasably receive a corresponding forklift tong;
positioning said first tunnel elements between pairs of said handle portions of said first subarray such that said first tunnel elements extend in said width direction; and
placing a second subarray of said gas cylinders on top of said first subarray such that the foot portions of said second subarray are in nesting engagement with said handle portions of said first subarray.
2. A method as defined in claim 1 , further comprising:
providing a pair of second tunnel elements each being configured to releasably receive a corresponding forklift tong;
positioning said second tunnel elements between pairs of said handle portions of said second subarray such that said second tunnel elements extend in said depth direction; and
placing a third subarray of said gas cylinders on top of said second subarray such that the foot portions of said third subarray are in nesting engagement with said handle portions of said second subarray.
3. A method as defined in claim 2 , further comprising:
providing a plurality of pillar elements, each said pillar element including a first tunnel receiving aperture and a second tunnel receiving aperture;
vertically positioning each said pillar element within a respective void defined by four adjacent said gas cylinders in said first subarray;
during said positioning of said first tunnel elements, inserting said first tunnel elements through at least one respective said first tunnel receiving aperture; and
during said positioning of said second tunnel elements, inserting each said second tunnel element through at least one respective said second tunnel receiving aperture.
4. A method as defined in claim 3 in which, in each said pillar element, said first tunnel receiving aperture is orthogonal to said second tunnel receiving aperture.
5. A method as defined in claim 3 in which each said pillar element includes flap members extendable radially thereof, and further comprising:
placing each said flap member in protective disposition between weld lines of a respective pair of adjacent said gas cylinders.
6. A method as defined in claim 3 , further comprising:
placing a cap element in at least partial receiving engagement with said third subarray; and
substantially rigidly securing said subarrays, base tray element and cap element together.
7. A method as defined in claim 6 further comprising:
forming said base tray element from a respective base tray blank;
forming said first tunnel elements from respective first tunnel blanks;
forming said second tunnel elements from respective second tunnel blanks;
forming said pillar elements from respective pillar blanks; and
forming a cap element from a respective cap blank.
8. A method as defined in claim 7 in which one or more said blanks are comprised of corrugated cardboard.