Патент USA US2129956код для вставки
sept. 13, 1938. c. T. PASTOR SPIRAL COVERING MACHINE Filed Nov. 11, 19.56 2,129,956 2,129,956 Patented Sept. 13, 1938 UNITED STATES PATENT OFFICE v 2,129,956 sPmAL covEmNG MACHINE Carl Theodor Pastor, Huls, near Krefeld, , - Germany - ' Application November 11, 193s, serial No. 110,32 ’ In Germany October 27, 1934 - - s claims. (ci. 117-42) My invention relates to a spiral covering ma chine with spindles having individual electric as indicated at 1 or 'l' depending upon Whether the thread runs oiï from the lower -or upper end' drives. When covering threads, the core threadpass- . of the bobbin 2. . " The essential feature ofthe invention lies, con 5 ing through the hollow spindle of the yarn hold sequently, in the fact that the thread 1 isi pressed 5 ing bobbin is spirally covered with the covering onto the revolving calotte 5 by the air current thread. At high operating speeds, such as, for coming from above as indicated `by tli'e arrows instance, 6,000 and more R. P. M., the drawback 8. The ring 6 has a nozzle-like effect. The air l exists that the point, where the covering thread current is produced according to the embodiment l0 runs on the core thread, begins to wander in the u shown in Fig. 1 by the revolving calotte from the 10 i axial direction, thereby impairing the quality of` the covering thus produced. _This is particular edge of which the air is centrifuged thus creating a depression, whereby a supplementary aircur rent is produced a's indicated bythe arrows 8 textile threads. ' which presses the thread onto the calotte. The 15 'I'his drawback is avoided according to the in calotte, therefore, fulfills at the same time two 15 vention by the use of'a mushroom-shaped thread requirements, i. e., it serves to guide the thread guide adapted to the form of the thread balloon and to produce the air current. and secured to thel upper end of the spindleThe invention is not limited tothe embodiment revolving at a speed exceeding 6,000 R. P. M. At disclosed, particularly not to the means described 20 such a high speed, the air is centrifugated from for guiding the thread and for producing the air 20 ly the case when covering rubber threads with the outer'edge of the thread guide, thus causing by the depression thereby produced a supplemen tary air current in a substantially axial direc tion which then flows from the center Aof the 25 calotte to the periphery thereof. 'I'his air cur rent presses the covering thread running 'on the core thread against the surface of‘the calotte. In this manner, a wandering of the point where the covering thread runs on the core thread mov 30 ing in the axial direction is prevented. ` The air current is strengthened according to the inven tion by a stationary ring arranged above the'up current. - , _ ~ 'I'he device shown in'_diagrammatic form in Figs. 2 and 3 serves to strengthen the air current which presses the` covering thread onto the calotte. This is brought aboutv by longitudinal 25 apertures arranged in the bobbin holding the cov ering thread. 'I'hese longitudinal apertures have a fan-like -eiîect, since owing to the high speed of the bobbin the air present in the longitudinal apertures is caused to flow outwardly and, there- 30 fore,>in the downward direction out of the bores of the bobbin. 'I‘he depression thereby created per end of the bobbin and having a convex sur in the bores of the bobbin causes a suction of face with respect >to the axis of the spindle. In the air in the axial direction. This current of 35 operation the ring influences the air current in_ air pas'ses along the covering thread and presses 35 the neighborhood of the. covering thread. The the latter firmly against the surface of th'e revolving covering thread doesI not, however, mushroom-shaped ,thread guide. For strength come into contact with the ring. ~ ' In the accompanying drawings two embodi which has fan-like acting projections, recesses 40 ments of my invention are vshown in diagram matic form, in which - ~ Fig. 1 shows> an elevational view of a spiral ening the air current a >circular cover plate or inclined perforations or any suitable means 40 for producing a fan effect maybe preferably ar ranged on the upper end of thethread holding , covering machine and ' bobbin. This eñect may be further strengthened Figs. 2 and 3 show a modiñed form of the in- ~ by giving the inner surface of the longitudinal apertures a convenient shape by providing these 45 ~ 'I'he motor I carries on its hollow spindle the 'surfaces with grooves or the like which under thread holding bobbin 2. The thread to be cov- " circumstances have such a twist as to act as an ered, for instance,- a rubber thread 4 passes axial pump. _ Other means such as devices which through the hollow spindle 3. The mushroom are based on the principle of the Francis tur 50 shaped thread guide 5 adapted to the form of bine'or the Kaplan turbine or also other blade 50 the thread balloon is secured to the upper end wheels and >the like may be employed for of the hollow spindle 3 so as to directly face the l strengthening the air current. >It has been found particularly advantageous running-on point of the cover thread. 6 denotes to design spiral covering devices each combined the ring which strengthens the air current pro 66 duced. The thread balloon 'l assumes the shape with an electric motor in such a manner that the 55 45 vention. 2 2,129,956 air current produced by the motor-ventilator is utilized for influencing the run of the thread. 'I_'he means forproducing the air current are so designed that the air current is regulable. In Fig. 2, 2l denotes the thread passing through the hollow spindle and which is to be covered with the thread 22. 23 is the running-on point, 24 is4 the motor, 25 the spindle thereof and 26 the bobbin mounted thereon. The body of the bob 10 bin has longitudinal bores 21. 30 denotes a plate or cover mounted on the upper frontal side of the bobbin 26 and gripping over the rim 33 of this bobbin. 'I'he cover 34 has openings and projecting parts 35, thus forming a fan for pro guiding surface adapted to the shape of the ad jacent part of said balloon. 3. In a machine for twisting cover threads around a core thread, a tubular spindle designed to carry a bobbin of said cover thread and to guide through its bore said core thread, an elec tric motor connected with said spindle and adapted for revolving-said spindle at a speed above 6,000-R. P. M., a mushroom-shaped guide for said cover thread mounted on one end of 10 said spindle, a body for holding a bobbin of said cover thread, said body being arranged on said spindle between said motor and said thread guide and having longitudinal apertures for the passage 15 ducing an air current which passes the bores 21. ~ of air, and a fan-like element on said body for The direction of the air current is indicated by the arrows 28. The mushroom-shaped thread guide 29 adapted to the thread balloon is pro vided with a hole 30 for the passage of the 20 thread 2| to be covered. yarn on the bobbin. 3| denotes the covering - Fig. 3 illustrates a plan View of the bobbin hav ing a hub 3.2 as shown. The machine according to the invention may 25 be under circumstances employed also for twist ing when the core threadto be covered is omitted. I claim as my invention: 1. In a machine for twisting cover threads around a core thread, a rotatable tubular spindle producing an air current flowing'in axial direc tion against said thread guide and partly pass ing through said apertures of said body. 4. In a machine for twisting cover threads around a core thread, a tubular spindle designed 20 to carry a bobbin of said cover thread and to guide through its bore said core thread, an elec tric motor connected with said spindle and adapt ed for revolving said spindle at a speed above 6,000 R. P. M., a mushroom-shaped guide for said 25 cover thread mounted on one end of said spindle, means for holding a bobbin of said cover thread on said spindle between said motor and said mushroom-shaped guide, said machine being de for guiding the core thread, means for holding a bobbin of the cover thread, a thread guide fixedly mounted on one end of said spindle for guiding said cover thread coming from said bob bin around said core thread, said machine being designed to allow, when in operation, said cover thread to form a thread balloon, said thread guide having a guidingsurface adapted to the shape of signed to allow, when in operation, said cover 30 thread to form a thread balloon, said thread guide havinga convex surface shaped according to the contour of the-adjacent portion of said thread balloon and being arranged to Ycontact with said the adjacent part of said balloon, and a sta ing a bobbin of a th'read to be twisted, means for revolving said spindle, a thread guide ñxedly mounted on said spindle, said thread guide hav 40' ing a convex surface shaped according to the shape of the thread balloon near the running on point of said thread and being arranged to contact said thread, and means for producing an air current and for directing said current against 45 said convex surface of said thread guide in order `to hold said thread in contact with said surface, said machine being designed to allow, when in -operation, said cover thread to form a thread tionary ring arranged between said bobbin and 40 said thread guide and having a convex inner an nular surface in order to guide the air current produced by said thread guide and said balloon ‘ when in operation, said ring surrounding -said spindle portion balloon balloon face, concentrlcally and the diameter of the of theI inner ring surface nearest to said being larger than the diameter of the portion next adjacent to said ring sur , 2. In a machine for twisting cover threads 50 around a core thread, a tubular spindle designed to carry a bobbin of said cover thread and to guide through its bore said core thread, an elec tric motor connected with said spindle and adapt ed for revolving said spindlev at a speed above 55 6,000 R. P. M., a mushroom-shaped guide for said cover thread mounted `on one end of said spindle, means, actuated by said spindle, for producing an air currentl flowing in axial direc tion against said thread guide, and a body for holding a bobbin of said cover thread, said body being arranged on said spindle between said mo tor and said thread guide and having apertures in axial direction for the passage of said air current, said machine being- designed to allow, 05 when in operation, said cover thread to form a thread balloon, and said thread guide having a portion. 5. In a machine for twisting strands from threads, a revolvable spindledesigned for carry- » balloon, and said thread -guide having a guiding surface adapted to the shape of the adjacent part of said balloon. 6. With a machine for twisting cover threads around a core thread, said machine being de signed to allow said cover _thread to form a thread balloon, in combination, a rotatable tubular spin dle for guiding said core thread, means for hold ing a bobbin of said cover thread, and a rotatable thread guide ñxedly mounted on the end of` said spindle so as to be in immediate proximity of co the running-on point of said cover thread, said thread guide having a convex surface shaped ac cording to the contour of the adjacent portion of said thread balloon and being arranged to con tact with said portion. ‘ CARL THEODOR PASTOR.