Abstract: An apparatus and process for the production of double wall containers is disclosed. The apparatus comprises a single wall container feeding station, a container blank feeding station and an erecting and telescoping station. In accordance with the disclosed process, flat carton blanks are fed in timed sequence from a blank feeding station into an erecting station where the blank is erected. Previously formed single wall containers are aligned in a feeding station with the erected blank and then telescoped into the erected blank with the aid of a plurality of oscillating guide arms disposed between the single wall container and the erected blank. Thereafter, the completed double wall container is ejected from the erecting and telescoping station.