Single needle or twin needle lockstitch flat bed machines with bottom feed and DA Direct Drive
The particularly wide range of applications in the field of “medium-heavy duty sewing” leads the used machine technology to its limits in many cases. On the one hand these operating means have to be able to process especially thick sewing materials with thick threads and large stitch lengths, on the other hand the same machines are expected to sew fine leather goods with very thin threads without tension puckering and without markings caused by the feeding components.
The machines of the subclass “SENSITIVE” have exactly been designed for these sensitive applications.
Technically, these machines are different due to the PTFEcoated throat plates, hook covers and attachment slides enabling a trouble-free material feed during the sewing process, even when working with difficult-to-feed materials like fine leather. Furthermore, the needle bars and feeding foot bars are coated with diamond-like carbon (DLC) allowing a nearly oil-free sewing.
In order to guarantee a constant hook thread tension from the full to the empty bobbin the innovative CTB bobbins are used as standard. On the upper side these extremely light and high-strength bobbins are equipped with an inspection window for the optical control of the bobbin thread capacity.
On the underside a cylindrical braking and lifting spring dramatically reduces the overspinning of the bobbin and facilitates the bobbin change for the operator.
The especially adapted sewing kinematics with reduced needle bar stroke guarantees a perfect stitch formation in fine materials.
Apart from the thread trimming system also an electropneumatic sewing foot lift and automatic backtacking belong to the basic equipment of all subclasses.