Multi-tab folder for ring type stretch film wrapping machine, and a method of operating the same

Abstract

A new and improved film wrapping or packaging machine has incorporated therein a new and improved mechanism or system for implementing the downward folding of outwardly projecting edge or tab portions of slip sheets interposed between successive tiers, levels, or layers of articles or goods forming a palletized load. The folding mechanism or system comprises a plurality of vertically oriented posts which are initially disposed above the outwardly projecting tab portions, subsequently independently aligned with outer edge portions of the outwardly projecting tab portions of the slip sheets, and thereafter lowered so as engage the tab portions of the slip sheets and fold the same vertically downwardly against the vertical sides of the palletized load such that the downwardly folded tab portions can now be enveloped within the wrapping or packaging film. As the wrapping or packaging film constantly envelops the downwardly folded tab portions, the vertically oriented posts are being moved upwardly so as to constantly be released from their engagement positions with the tab portions until the wrapping or packaging operation or cycle is completed. The film wrapping carriage and the vertically oriented posts are then moved to uppermost positions in preparation for the start of a new wrapping or packaging cycle.