TANNER preform feeding systems for PET stretch blow machines or PET preform test systems. More than 30 years ago, Tanner designed and manufactured PET preform feeding systems for PET blow moulding machines. The first systems were developed for an output of 500 preforms per hour. Since 2012, the Tanner VZT-6172 preform feeding system has been able to feed over 80,000 preforms per hour to the PET stretch blow machine.