Abstract: A machine for forming from a one-piece flat carton blank a carton suitable for packaging biscuits and the like, which carton can be folded between transit and display positions and which is normally shrink-wrapped for transit purposes, which shrink-wrapping can be removed to allow the carton to be folded into its display position for use in supermarkets, the machine including a frame, support means for supporting the blank at a first folding station and folding means at said station for partially forming the blank into a carton and transferring it to a second folding station at which second folding means complete the erection of the carton, the first folding operation causing carton divider panels to be folded into back to back relationship and the second folding operation folding up side, end and glue flaps so that the carton is in a display position ready for filling, whereupon it can subsequently be folded to a transit position ready for shrink-wrapping.