BACK LATCHING SEAMING

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Manual737K-504M5-04/BK(BK-1)1340.7-23.66DCX27#117000
Manual747K-514M5-2□/BK(BK-1)2423,40.7-23.66DCX27#117000
Manual747K-514M7-2□/BK(BK-1)2424,50.7-23.67DCX27#117000
Manual737K-504M5-04/BK(BK-1)/DKK□1340.7-23.66DCX27#117000
Manual747K-514M5-2□/BK(BK-1)/DKK□2423,40.7-23.66DCX27#117000
Manual747K-514M7-2□/BK(BK-1)/DKK□2424,50.7-23.67DCX27#117000
Manual737Qe-504M5-04/BK(BK-1)1340.7-23.66DCX27#117000
Manual747Qe-514M5-2□/BK(BK-1)2423,40.7-23.66DCX27#117000
Manual747Qe-514M7-2□/BK(BK-1)2424,50.7-23.67DCX27#117000
Semi-Auto747K-514M5-23/BKS/DKK□24230.7-23.66DCX27#117000
Semi-Auto747K-514M7-24/BKS/DKK□24240.7-23.67DCX27#117000
Semi-Auto747Qe-514M5-23/BKS24230.7-23.66DCX27#117000
Semi-Auto747Qe-514M7-2□/BKS2424,50.7-23.67DCX27#117000
Simplied Fully Auto737K-504M5-04/ECB/BKT/DKK□1340.7-23.67DCX27#117000
Simplied Fully Auto747K-514M2-24/ECB/BKT/DKK□24240.7-23.67DCX27#117000
Simplied Fully Auto737QD-504M5-04/ECB/BKT1340.7-23.67DCX27#117000
Simplied Fully Auto747QD-514M2-24/ECB/BKT24240.7-23.67DCX27#117000
Fully Auto737K-504M5-0□/BKF133,4,50.7-23.67DCX27#117000
Fully Auto747K-514M5-2□/BKF2423,40.7-23.67DCX27#117000

BACK LATCHING SEAMING 

To prevent seam looseness, turn over the thread and then insert into overlock seaming at the beginning of sewing. For sleeve and sideway sewing of underwear, sportswear etc.

Remark 1: 
Reduce needle thread’s tension, and adjust
fabric guide to get the special outlook
showing the needle thread on top side.

Remark 2: 
Replace upper looper by blind looper LP231
to make 2-thread overlock stitch

OperationCodeDiscriptionApplicable SeriesDrive Type
ManualBK Rotary Plate  737K
747K
737Qe
747Qe
To equip with servo motor for needle position function is optional and recommended.
BK-1 Fixed Plate  
Semi-AutoBKS4 Thread overlock applicable,Needle plate tongue Auto-retracted.747K
747Qe
Padel valve control Pneumatic type
Simplied Fully AutoBKT

1. Simplified type, back latch length 2cm.
2. With ECB cutter, Needle plate suction channel for thread-end down turning .

737QD
747QD
700QD Control system Pneumatic type
Fully AutoBKF

1. With VT suction trimmer,
2. Multi-operartion mode setting 
3. Thread-end side turning. Back latch length is adjustable (Min. 1cm)

737K
747K
Hohsing i70 Servo Motor Pneumatic type