bernette 62 AIRLOCKThe coverstitch machine with easy air threading The bernette 62 AIRLOCK is the coverstitch machine of the b60 series. The automatic air threader makes threading the looper thread child's play. The machine has 4 coverstitches and 3 chainstitches and can be used for countless applications, with which different fabric types stretchy fabrics in particular can be sewn perfectly. The presser foot can be lowered and temporarily raised with the knee lifter,