Rieter Machine Works, Ltd.

Maschinenfabrik Rieter Ag

Sulzer Rueti Ag

Luwa Ag

Sulzer Ruti Ag

Emil Briner

Herbert Stalder

Urs Keller

Peter Novak

Hermann E Gasser

Arthur Wurmli

Werner Oeggerli

Richard Hieronymi

Samuel Wehrli

Heinz Clement

Isidor Fritschi

Georg Senn

Johann W Ferri

Josef Baumgartner

Bruno Tanner

Bruno Fritschi

Heiner Eberli

Werner Steinmetz

A carriage for changing a harness or heald frame on a loom has a frame with a device for offering up the warp beam, a framework which includes a carrier mounted on the frame, and devices mounted on the carrier for offering up the warp stop motions and the heald shafts. Relative movement between the offering-up device is thus prevented due to the fact that the devices are mounted together on the carrier. The carrier is journalled in supports and is pivotable about an axis so that the offering-up devices can automatically align themselves with the corresponding supports

Carriage for changing the harness or heald frame in a loom

In the combination of a carriage for the preparation and storage of fabric to be changed on a loom, a loom for receiving the fabric to be changed, and an insertion vehicle for changing the fabric at the loom, improvements in the method of fabric change as well as the associated carriage and insertion vehicle are set forth. The method allows the carriage for the preparation and storage of fabric to be changed to have the working distance between the warp stop motion and the loom to be adjusted dependent upon shed size, density of fabric and warp material. The carriage for the preparation and storage of fabric includes a warp clamp and adjustment for spacing the warp stop motion with respect to the loom harness and heald frames. The insertion vehicle includes a centering mechanism for placing the loom harness and heald frames to the loom.

Insertion vehicle and carriage for changing a fabric to be woven on a

The method and apparatus for supplying a reserve feed stock to a spinning machine or spinning position thereof, contemplates monitoring the operational state of a production feed stock and upon reaching a predeterminate operational state thereof, such as near depletion or depletion of the production feed stock, or even rupture thereof, bringing a reserve feed stock previously held in readiness into a production position where such reserve feed stock now assumes the role of a production feed stock. In this way, downtime of the spinning machine or spinning position can be minimized and its operation at least partially automated insofar as there is always available a reserve feed stock to allow for essentially continuous or continual production of a spun yarn or thread.

Method and apparatus for supplying reserve feed stock to a spinning

The delivery roller pair are made with continuous uninterrupted cylindrical surfaces so that air flows on the input side converge in the nip and then flow from the central zone thereof to opposite end zones. In addition, the air flows on the output side flow from the end zones towards the central zone. The suction nozzle is disposed downstream and in alignment with the nip so as to receive the fiber material for spinning into yarn.

Drafting arrangement for false twist spinning

There are formed at the wall of the friction spinning element bores or holes with a predeterminate bore diameter and a coating on their side facing a fiber feed duct, the coating extending over the bore edges into the bores or holes. Each bore or hole thus formed has a diameter at the bore or hole entrance or inlet which is smaller than the bore diameter of the related bore or hole. Each bore or hole has a cross-sectional area of less than 0.283 mm.sup.2, but amounting to at least 0.07 mm.sup.2. In this way, the undesirable penetration of fibers or fiber parts into the bores or holes is prevented as far as possible when air flows through the bores or holes at the side of the coating, while retaining a hole form or configuration which is favorable from the standpoint of airflow and blockage of the bores or holes.

Method for production of friction spinning means

For performing a start spinning operation in a friction spinning apparatus, upon starting or recommencing spinning of a yarn after yarn breakage, there are accomplished the following steps: fibers opened in a fiber sliver opening device are delivered by a fiber infeed duct to a rotating friction spinning drum and twisted into a twisted fiber structure or coil. When the coil has reached a substantially predeterminate diameter it is entrained by an air jet delivered by a blowing duct into a yarn entraining nozzle which deflects the coil and the yarn following the coil, before they reach the rotating yarn drawn-off rolls, axially of the yarn draw-off rolls, into a yarn guide duct. A suction device is located at the outlet of the yarn guide duct such that a negative pressure is produced therein for taking up the air from an injector part of the yarn entraining nozzle and the coil and the yarn following the coil and supplying such to the suction device. After the coil has passed by a non-continuous draw-off roll of the yarn draw-off rolls, the entraining air in the injector part and in the blowing duct is interrupted such that the yarn extracted by the suction nozzle is stretched and issues from the yarn guide duct through a slot therein and is guided between the yarn draw-off rolls. This yarn take-up by the yarn draw-off rolls accelerates the yarn to the operative yarn draw-off speed.

Method of, and device for, performing a start spinning operation for

The wall of the friction spinning element has bores or holes with a predeterminate bore diameter and a coating on their side facing a fiber feed duct, the coating extending over the bore edges into the bores. Each bore or hole thus formed has a diameter at the bore or hole entrance or inlet which is smaller than the bore diameter of the related bore or hole. Each bore or hole has a cross-sectional area of less than 0.283 mm.sup.2, but amounting to at least 0.07 mm.sup.2. In this way, the undesirable penetration of fibers or fiber parts into the bores or holes is prevented as far as possible when air flows through the bores or holes at the side of the coating, while retaining a hole form or configuration which is favorable from the standpoint of airflow and blockage of the bores or holes.

Open end friction spinning device for production of a yarn or the like

A textile machine, such as a spinning machine, is suction cleaned from spinning position to spinning position by a movable programmable robot provided with a suction device. This enables individual elements of the spinning machine prone to impurity or contaminant fouling to be maintained effectively free of such impurity depositions including fiber accumulations and the like without requiring use of the heretofore employed blowing-suction fucntion. The movable programmable robot is controlled by virtue of its being programmaged such that a suction trunk or nozzle thereof is guided in such close proximity to the individual elements to be suction cleaned that the suction cleaning operation can be effectively carried out and in a short period of time, following which the movable programmable robot is moved to the next spinning position for performance of the same or desired suction cleaning operation.

Apparatus for cleaning a textile machine comprising a plurality of

In order to start or recommence spinning of a yarn in a friction spinning apparatus, in the course of starting of spinning or piecing after a yarn break, by means of a fiber transport duct, fibers separated by an opening device, are delivered to a rotating friction spinning drum and twisted to form a twisted fiber structure. When the twisted fiber structure has reached a substantially predetermined diameter, the twisted fiber structure is moved by an airstream delivered from a pressure air infeed channel towards and into a guide tube and from that location, into the convergent space of rotating withdrawal rolls. The twisted fiber structure is entrained at production speed by these withdrawal rolls and is delivered to the diverging or outlet side of the withdrawal rolls to a suction device placed in readiness. This suction device can transfer the formed yarn following the twisted fiber structure to the succeeding or downstream elements provided for further processing.

Device for starting or recommencing spinning of a yarn in a friction

The method of, and apparatus for, producing a yarn uses a friction spinning device comprising a perforated first friction spinning drum and a second friction spinning drum which can also be perforated. Two fiber feed passages project to the first friction spinning drum and are each supplied by opening assemblies which individualize or individually separate the fibers. The fibers are transported toward the first friction spinning drum using a feed air stream in the fiber feed passages. This feed air stream is produced by the first friction spinning drum which is maintained under sub-pressure. Advantageously, the fiber double-feed to the friction spinning drum permits supplying two different fiber types to the same yarn end. Also, different inclinations of the fibers at the friction spinning drum can be obtained by different inclinations of the fiber feed passages in order to produce yarns of different character. The first and second friction spinning drums can be each divided into cooperating drum sections to define a first pair of coacting drum sections and spaced therefrom a second pair of coacting drum sections. The respective pairs of drum sections can be operated at different rotational speeds and can be subjected to different vacuum conditions.

Methof of, and apparatus for, producing a friction spun yarn

In the manufacture of friction spinning drums, in order to be able to select the size of the holes or perforations, on the one hand, to oppose technological fiber loss and jamming of sucked in foreign particles and, on the other hand, to provide airflow advantages, it is proposed to manufacture the friction spinning drum from a thick-walled support and a thin-walled perforated body. As a result, holes or perforations having a sufficiently small cross-section to counteract the above-mentioned fiber loss can be formed in the thin-walled perforated body. On the other hand, holes or perforations having a large enough cross-section to prevent jamming of sucked in foreign particles or other contaminants can be provided in the thick-walled support.

Friction spinning drum

The method of, and apparatus for, producing a yarn uses a friction spinning device comprising a perforated first friction spinning drum and a second friction spinning drum which can also be perforated. Two fiber feed passages project to the first friction spinning drum and are each supplied by opening assemblies which individualize or individually separate the fibers. The fibers are transported toward the first friction spinning drum using a feed air stream in the fiber feed passages. This feed air stream is produced by the first friction spinning drum which is maintained under sub-pressure. Advantageously, the fiber double-feed to the friction spinning drum permits supplying two different fiber types to the same yarn end. Also, different inclinations of the fibers at the friction spinning drum can be obtained by different inclinations of the fiber feed passages in order to produce yarns of different character.

Method of and apparatus for producing a friction spun yarn

The method of, and apparatus for, producing a yarn using a friction spinning device comprising a perforated first friction spinning drum and a second friction spinning drum which can also be perforated. Two fiber feed passages project to the first friction spinning drum and are each supplied by opening assemblies which individualize or individually separate the fibers. The fibers are transported toward the first friction spinning drum using a feed air stream in the fiber feed passages. This feed air stream is produced by the first friction spinning drum which is maintained under sub-pressure. Advantageously, the fiber double-feed to the friction spinning drum permits supplying two different fiber types to the same yarn end. Also, different inclinations of the fibers at the friction spinning drum can be obtained by different inclinations of the fiber feed passages in order to produce yarns of different character.

Method of and apparatus for producing a yarn

A friction spinning device has a pneumatic fiber transport passage or channel inclined at an angle to a perforated friction spinning element and a yarn formation position of the perforated friction spinning element is located at a spacing from an opening of the pneumatic fiber transport passage or channel. In such a friction spinning device, it is desired to ensure that the fibers located on the perforated friction spinning element are transported towards the yarn formation position neither parallel to nor at right angles to the yarn formation position. For this purpose, the perforations of the perforated friction spinning elements are so arranged that straight lines joining the perforation centers are disposed neither parallel to nor at right angles to the yarn formation position. In this way, fibers transported onto the perforated friction spinning element are laid on such perforated friction spinning element in the direction of the rows of perforations due to the intensity of the transporting air. In this way, a desired or appropriate disposition of these fibers is ensured.

Friction spinning device containing a friction spinning means and method

In order to start or recommence spinning of a yarn in a friction spinning device, the following method steps are carried out upon start-up of a new spinning operation or upon piecing after a thread break: fibers separated by an opening device are delivered by means of a fiber transporting passage to a rotating friction spinning drum and are twisted to form a twisted fiber structure; when the twisted fiber structure has substantially reached a predeterminate diameter or size, then the twisted fiber structure is transported by an airstream delivered by a pressure duct towards and into a guide tube and is forwarded therein into a convergent space of rotating withdrawal rolls; and the twisted fiber structure is caught at production speed by these withdrawal rolls and delivered on a divergent side of the withdrawal rolls to a receiving suction device which transfers the spun yarn subsequent to the twisted fiber structure to further processing elements.

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Winterthur, Switzerland

Emil Briner