Pallet roping and wrapping apparatus
View Patent ↗Pallet roping and wrapping machines having a plurality of spools of stretch film supported on one or more spools and guides that form ropes of stretch film without cutting. Specific implementations of guides include guides formed or rings and rollers. Positions of guides may be adjustable. A primary roll of stretch film may be positionally coupled to a primary spool core, and a plurality of secondary rolls of stretch film may be positionally coupled to one or more secondary spool cores. The wrapping machines may include a plurality of guides positioned to narrow the stretch film from the plurality of secondary rolls to form a plurality of ropes fully overlapping a web of the primary roll of stretch film when wrapped around a palletized load.
1. A method of inhibiting tearing of stretch film wrapped around a palletized load, comprising:
dispensing a primary roll of stretch film supported on a first support member;
dispensing at substantially the same rate at least one secondary roll of stretch film supported by a second support member;
narrowing a width of the at least one secondary roll with at least one set of guides to a width less than a width of the primary roll;
positioning, with the at least one set of guides, the stretch film from the at least one secondary roll to overlap the stretch film of the stretch film from primary roll within the width of the primary roll; and
simultaneously applying the stretch film from the primary roll and the stretch film from the at least one secondary roll to a palletized load such that the stretch film from the at least one secondary roll overlaps the stretch film from the primary roll within the width of the stretch film from the primary roll before the stretch film from the primary roll and the stretch film from the at least one secondary roll are applied around the palletized load.
2. The method of claim 1 , wherein the at least one set of guides comprises at least two sets of guides and positioning comprises:
positioning, with a first set of guides of the least two sets of guides, a first rope formed of a first portion of the stretch film from the at least one secondary roll between a central portion of the stretch film from the primary roll and a first edge of the stretch film from the primary roll; and
positioning, with a second set of guides of the at least two sets of guides, a second rope formed of a second portion of the stretch film from the at least one secondary roll between the central portion and a second edge of the stretch film from the primary roll.
3. The method of claim 2 , wherein the at least two sets of guides comprises at least three sets of guides, the at least one secondary roll comprises at least three secondary rolls, and further comprising a third rope formed of a third portion of the stretch film from the at least one secondary roll, the method further comprising positioning, with a third set of guides of the at least three sets of guides, the third rope approximately central between the first edge and the second edge of the stretch film from the primary roll.
4. The method of claim 2 , wherein the at least two sets of guides comprises at least four sets of guides, the at least one secondary roll comprises at least four secondary rolls, and further comprising a third rope formed of a third portion of the stretch film from the at least one secondary roll and a fourth rope formed of a fourth portion of the stretch film from the at least one secondary roll, the method further comprising:
positioning, with a third set of guides of the at least four sets of guides, the third rope between the first edge and the second edge of the stretch film from the primary roll; and
positioning, with a fourth set of guides of the at least four sets of guides, the fourth rope between the first edge and the second edge of the stretch film from the primary roll such that each rope of the first, second, third and fourth ropes is equal distance from the adjacent rope of the four ropes.
5. The method of claim 1 , further comprising simultaneously pre-stretching the stretch film from the primary roll and the stretch film from the at least one secondary roll while the stretch film from the at least one secondary roll is overlapped with the stretch film from the primary roll prior to applying the stretch film from the primary roll and the stretch film from the at least one second roll to the palletized load.
6. The method of claim 1 , further comprising perforating the stretch film from the primary roll and the stretch film from the at least one secondary roll before applying the stretch film from the primary roll and the stretch film from the at least one secondary roll to the palletized load.
7. An apparatus for securing a palletized load, comprising:
a primary roll of stretch film supported by a first spool support member, the primary roll comprising a width defined by top and bottom edges of the stretch film;
a secondary roll of stretch film supported by at least a second spool support member; and
a first set of guides comprising a first guide width between two guides of the set of guides, the first guide width being less than a width of the secondary roll, wherein the two guides are positioned to receive the secondary roll stretch film, narrow the secondary roll stretch film to a width less than the width of the primary roll, and after narrowing the secondary roll stretch film positioning the secondary roll stretch film to overlap the secondary roll stretch film onto the primary roll stretch film between the top and bottom edges of the primary roll stretch film as the primary roll stretch film and the secondary roll stretch film are wrapped around a palletized load.
8. The apparatus of claim 7 , further comprising a third roll of stretch film supported adjacent to the secondary roll of stretch film, and a second set of guides comprising a second guide width less than the width of the primary roll; wherein the second set of guides is positioned to receive stretch film from the third roll, narrow the stretch film from third roll to a width less than the width of the primary roll, and after narrowing the stretch film from the third roll positioning the stretch film from the third roll to overlap the stretch film from the third roll onto the primary roll stretch film between the top and bottom edges of the primary roll stretch film adjacent to the secondary roll stretch film as the primary roll stretch film, the secondary roll stretch film and the stretch film from the third roll are wrapped around a palletized load.
9. The apparatus of claim 8 , further comprising a fourth roll of stretch film supported adjacent to the second roll of stretch film, and a third set of guides comprising a third guide width less than the width of the primary roll; wherein the third set of guides is positioned to receive stretch film from the fourth roll, narrow the stretch film from the fourth roll to a width less than the width of the primary roll, and after narrowing the stretch film from the fourth roll positioning the stretch film from the fourth roll to overlap the stretch film from the fourth roll onto the primary roll stretch film between the top and bottom edges of the primary roll stretch film adjacent to the stretch film from the third roll as the primary roll stretch film, the secondary roll stretch film, the stretch film from the third roll and the stretch film from the fourth roll are wrapped around a palletized load.
10. The apparatus of claim 8 , wherein the second roll and the third roll are positionally coupled to a common core such that the second roll and the third roll unroll at substantially the same rate.
11. The apparatus of claim 8 , wherein the second roll and the third roll are each coupled to a different core of at least two cores, the at least two cores being coupled together such that the second roll and the third roll unroll at substantially the same rate.
12. The apparatus of claim 8 , wherein the second roll and the third roll are colored differently than the primary roll.
13. The apparatus of claim 7 , further comprising a perforating spindle positioned adjacent the second roll of stretch film to perforate the primary roll of stretch film and the at least two secondary rolls of stretch film as the primary roll and the at least two second rolls are wrapped around the palletized load.
14. The apparatus of claim 7 , wherein the second roll is colored differently than the primary roll.