The use of INNLOP internal envelopes, in place of the process with wheel, allows a time reduction of 30 minutesin autoclave. With this, the retreader saves time, electric power and steem, increasing profitability. It also providesbetter finishing in bead repairs and other repairs. It increases the envelope life, exempts the use of curing tubes, flaps and metallic wheels. It also allows great convenience on tyre mounting for vulcanization.