an automatic package wrapping apparatus of the l - scaler type . the packages to be wrapped are transported through the apparatus in a straight line one by one and in so doing pass through a film inverting head where they are surrounded by a pre - folded thermoplastic film . the film is supplied from the rear of the apparatus in a prefolded condition and is both turned inside out and redirected into a path corresponding to the path of the packages through the apparatus in the film inverting head . also that method of wrapping packages wherein a generally u - shaped inverting head is provided , wherein a length of longitudinally pre - folded thermoplastic film is passed over and then through said head thereby turning the film inside out and redirecting its path and wherein the package to be wrapped is passed through said inverting head thereby surrounding itself with said film .