DURKOPP ADLER M-TYPE 867 - Opening the Thread Tension

6.3 Opening the thread tension
Subclasses
867-190020, 867-190020-M, 867-190040, 867-290020, 867-290040,
867-190020-70, 867-190040-70, 867-290020-70, 867-290040-70
When lifting the sewing feet with the knee switch, main and
supplementary tension are automatically opened.
Subclasses
867-160152, 867-190122, 867-190125, 867-190142, 867-190142-M,
867-190145, 867-190146, 867-190322, 867-190342, 867-190425,
867-190445, 867-260152, 867-290122, 867-290142, 867-290322,
867-290342, 867-290445, 867-392342, 867-393342, 867-394342,
867-490322, 867-190122-70, 867-190322-70, 867-190342-70,
867-290122-70, 867-290322-70, 867-290342-70, 867-290342-100
The thread tension is automatically opened when trimming the thread.
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Keystone Sewing Machine Company, Inc.