connected to the film roll carriage, through means of a suitable cable, so as to normally tend to elevate the film roll carriage and the roll of plastic wrapping film mounted thereon. The mast member is provided with a plurality of vertically spaced apertures, and the disposition of a spring-biased stop pin, with respect to the individual apertures, is able to be controlled by means of a manually-operated cable and lever mechanism.
More particularly, when the lever is squeezed, in a manner similar to that of a hand-operated brake lever upon a bicycle, the cable causes the stop pin to be released from a particular one of the apertures of the mast member whereby the film roll carriage, along with the roll of plastic wrapping film mounted thereon, willbe elevated along the mast member so as to wrap the palletized load or product as the operator pushes the cart along a circular path around the palletized load or product. If continuous or concentric wrapping of the palletized load or product with the packaging film at a particular elevational level is desired, which is known as reinforcing wrapping, the lever is released so as to permit the stop pin to enter the next aperture located along the mast member. When the stop pin enters such aperture upon the mast member, further elevation of the film roll carriage, and the roll of wrapping film mounted thereon, is halted. At the completion of a wrapping cycle or operation, the operator needs to simply pull the film roll carriage downwardly