Abstract: A shut-off instrument for a flow medium, in particular a slide valve instrument designed for pressurization on both sides with an instrument housing forming a flow channel and a slide valve chamber and with a soft-sealing shut-off element closing off the flow channel and with a slide valve stem which penetrates a seal arrangement and/or bearing arrangement in a housing neck extension delimiting the slide valve chamber and which is rotationally connected to a stem nut coupled to the shut-off element by a screw contact. The shut-off element is designed to include more than one part and at least one external dimension of the main body is slightly smaller than a nominal width of the flow channel and seal elements are arranged on opposite support surfaces of the main body via an engaged connection projecting over the external dimension with a peripheral edge collar.

Abstract: Tube connection (1) for pullout-resistant connection of an insertion end (2) of a tube (3) to a connection sleeve (4), with a retention ring (18) encompassing the insertion end (2) at the circumference and is disposed in an inner groove (12) of the connection sleeve (4), wherein the insertion end (2) projects beyond the retention ring (18) by an excess length (25) in the insertion direction of the tube, and a sealing ring (34), preferably a lip sealing ring (35), which circumferentially encompasses the insertion end (2) is disposed in a ring groove (33), adjacent to the ring groove (12) and at a distance from it in the insertion direction of the tube end, and the connection sleeve (4) has a slit-shaped wall cutout (13) that allows radial insertion of the retention ring, over a partial region of the circumference of the sleeve section (11) that has the inner groove (12), wherein the wall cutout (13) extends over a cross-section sector whose inner angle is less than 180°.

Abstract: A shut-off instrument for a flow medium, in particular a slide valve instrument designed for pressurization on both sides with an instrument housing forming a flow channel and a slide valve chamber and with a soft-sealing shut-off element closing off the flow channel and with a slide valve stem which penetrates a seal arrangement and/or bearing arrangement in a housing neck extension delimiting the slide valve chamber and which is rotationally connected to a stem nut coupled to the shut-off element by a screw contact. The shut-off element is designed to include more than one part and at least one external dimension of the main body is slightly smaller than a nominal width of the flow channel and seal elements are arranged on opposite support surfaces of the main body via an engaged connection projecting over the external dimension with a peripheral edge collar.

Abstract: A shut-off instrument for a flow medium, in particular a slide valve instrument designed for pressurization on both sides with an instrument housing forming a flow channel and a slide valve chamber and with a soft-sealing shut-off element closing off the flow channel and with a slide valve stem which penetrates a seal arrangement and/or bearing arrangement in a housing neck extension delimiting the slide valve chamber and which is rotationally connected to a stem nut coupled to the shut-off element by a screw contact. The shut-of element is designed to include more than one part and at least one external dimension of the main body is slightly smaller than a nominal width of the flow channel and seal elements are arranged on opposite support surfaces of the main body via an engaged connection projecting over the external dimension with a peripheral edge collar.

Abstract: A process and device is provided to handle the yarn after piecing or bobbin replacement where conical bobbins are used. According to the process and with the apparatus, the yarn is transferred to the yarn guide in such a manner that the yarn is first guided in direction of the smaller diameter of the bobbin or former before the winding of the yarn over the entire bobbin width of the bobbin takes place.

Abstract: In an open-end spinning device a yarn draw-off nozzle suitable to ensure constant spinning conditions even at very high rotational speeds is provided. This is achieved in that the yarn draw-off nozzle is designed so as to be especially capable of heat dissipation and thus being capable of preventing a heat accumulation in the area of the yarn draw-off nozzle thanks to its high capability of heat dissipation.

Abstract: An open-end spinning device with a fiber feeding channel which extends from a housing with a rotating opening roller to a spinning element. The fiber feeding channel comprises two channel sections which can be moved towards each other and can be brought into alignment with each other. The first channel section is located in an insert of the housing and is capable of axial movement in the housing. The insert is urged by an elastic element in the direction of the second channel section and is covered by a screen on its end towards the interior of the housing, at least on the downstream side (with reference to the rotational direction of the opening roller). A seal is located between the insert and the housing.

Abstract: A yarn draw-off pipe for drawing off a yarn from an open-end spinning device. The draw-off pipe is equipped with first and second pipe sections, which are connected to each other through a connecting piece. The connecting piece contains a chamber and is provided with a deflection surface extending into the chamber. The latter is part of an insert. The connecting piece is provided with an insertion opening for this insert on its side towards the spinning element, when assembled, the insert is secured axially between the front end of the insertion opening and the first pipe section or, alternatively, between the two pipe sections. The insert is made of a ceramic material and, with its end towards the spinning device, projects radially beyond the outside diameter of the first pipe section. The area of the guide left free by the insert is filled with a plastic material.

Abstract: The housing (1) of a opening device for an open-end spinning apparatus is lined by a thin-walled insert (3) which exhibits a perforation for the discharge of material (dirt, fibers) from the interior space of the housing (1). For the protection of the edge (310) bounding this perforation downstream relative to the fiber flow, an edge protector (4) is provided which is slidable onto the edge (310) engaging over the latter. For sliding the edge protector (4) onto the edge (310) to be protected, or for stripping it therefrom, a combined insertion and ejection tool (5) is provided which is introducible into the insert (3) and movable with a contact surface (51) along the peripheral wall (33) of the insert (3). The combined insertion and ejection tool (5) has a receiving throat (6) for the temporary reception of the edge protector (4) with a step (60) overhanging the contact surface (51) and in turn exhibiting a stripping edge (67).

Abstract: An insert (3) is arranged in the interior space (10) of a housing (1) of an opening device for an open-end spinning apparatus. The insert (3) is of pot-like construction with a recess (35) provided in the base (34). The recess (35) exposes a bearing bore (18) through which a drive shaft extends for supporting the opening roller. A fixing device (41, 42) is likewise associated with the insert (3) securing its relative position to the housing. A guide element (5) introducible into the insert (3) is provided to guide the insert (3) during introduction into the housing (1) or during its removal. This has a contour corresponding to the interior space (10) of the housing (1) and one or more positioning lugs (50) on its end face opposite the base (34), corresponding to the number of the positioning cavities provided in the insert (3).