Aktiengesellschaft Adolph Saurer

Sauer Sticksysteme Ag

Adolph Saurer Ag

Max Schreiber

Armin Kobler

Hans Wallimann

Ernst Kuhnis

Jurg Henz

Livio Selm

A cutting apparatus for embroidery machines that facilitates the positive cutting of the threads at the end of each embroidery operation. Large-scale embroidery machines may provide several hundred embroidery positions, and each position is provided with an individually-actuable cutting and gripping device. These individual cutting mechanisms are in turn collectively mounted on one or more feeder bars that permit the pivotal movement of the cutter/grippers into and away from a position in close proximity to the embroidery needle stitch points. This pivotal movement permits the close cutting of the thread when required, yet otherwise locates the thread cutter/grippers at a position away from the stitch points during the embroidery operation itself.

Cutting and nipping apparatus for the front yarn for embroidery machines

The embroidery machine encompasses a large number of embroidery locations equipped with displaceably guided embroidery needles for the embroidery threads. These embroidery threads partially wrap about adjacently situated, conjointly to-and-fro oscillating thread guides of a thread delivery device in order to respectively accomplish the thread advance and thread retraction. At the region of the thread guides there is arranged a thread guide and clamping device comprising adjacently mounted guide elements located in a row upon a machine-fixed holder rail. These guide elements correspond in number to the number of embroidery locations and are constructed for guiding the threads, for clamping of the threads and for the cutting of the threads. With this arrangement there can be constructed or retrofitted, respectively, an embroidery machine of the aforementioned type such that there can be simply undertaken and with a good visual overview of the embroidery machine the guiding including the threading-in of the threads into the relevant guide elements, the clamping and severing of the thread ends of threads which do not participate in the embroidery operation, in other words are at standstill, and the non-participating threads can be optimally prepared for accomplishing a subsequent color or repeat change.

Embroidery machine equipped with thread guide and clamping device

A freely rotatably mounted roll body couplingly engageable with a brake shaft comprises an exchangeable thread brake liner. The rotatable roll body carrying the thread brake liner in a groove is exchangeably mounted between stationary guide discs which extend radially beyond the roll body on both sides and form a radial continuation of walls of the roll body, laterally defining a thread groove with their radially protruding portions and between which the roll body is exchangeably arranged.

Thread-guiding roll

The needle of an individual embroidery location of a multitude or row of linearly arranged embroidery locations in an embroidery machine is mounted at an axially displaceably guided needle carrier. According to a programmed control and by means of a related switching lever the needle can be individually coupled to or decoupled from an oscillating drive rail which is common to all the needles of the row. A thread guiding roller which is journaled for free rotation at a roller supporting lever and associated with a related one of the needles supplies a thread to the related needle. Simultaneously with the coupling or decoupling of the needle to the oscillating drive rail the roller supporting lever is pivoted between an operative position and an inoperative position in which the thread guiding roller is respectively coupled to or decoupled from a braking member which is common to all embroidery locations. The driving connection arrangement between the thread guiding roller and the common braking member is designed to act in the manner of a reducing gear, so that a rotary movement of the thread guiding roller causes a significantly less extensive rotary movement of the common braking member. The pivoting of the roller supporting lever is effected via a connecting member which may constitute a cord or a wire and which is connected to the switching lever which activates or deactivates the related embroidery location.

Growing community of inventors

Arbon, Switzerland

Max Schreiber