B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
156/56
B65B 11/02 (2006.01)
Patent
CA 1076947
ABSTRACT OF THE DISCLOSURE This invention is directed to a stretch-wrap machine wherein a motive unit carries a stretch-wrap unit around material to be wrapped. One approach to retaining a number of packages on a pallet has been steel banding. Steel bands were placed around the packages and the pallet and the bands tightened and clamped. The problem with steel banding is that loads can be crushed. Furthermore, the steel bands are difficult and dangerous to handle. Shrink wrapping has also been used, but requires special equipment for causing the shrinkage. Further, it cannot be used in cold rooms or other areas where high heat loads are objec- tionable. Also, it cannot be used over polyethylene wrapped pack- ages because of sticking between the shrink wrap material and such packages. Machines which wrap stretch-material have been developed. However, these machines cannot be effective unless the load is small enough to fit on a turntable. To overcome these disadvantages, the present invention provides a motive unit which carries stretch wrap unit around stationary material to be wrapped. The motive unit Is preferably self-propelled and may be self-guided by means of a track follower, although manual motive unit guide controls can be pro- vided. Alternatively, the motive unit may be self-propelled and biased to be self-guided around the unit to be wrapped. In such embodiment, a follower wheel contacts the unit to be wrapped and controls its steering. A propulsion urges the motive unit toward the material to be wrapped.
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