US2857113A

US2857113A - Suction nozzle for catching thread ends

Info

Publication number: US2857113A
Application number: US466395A
Authority: US
Inventors: Kupper Wilhelm
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-11-03
Filing date: 1954-11-02
Publication date: 1958-10-21
Anticipated expiration: 1975-10-21

Description

Ot.21, 1958 wmppm 2,857,113

SUCTION NOZZLE FOR CATCHING THREAb ENDS Filed Nov. 2. 1954 I 2 Sheets-Sna 1 INVENTOR. WILHELM KzJ'PPF 0:.21',1'95s w W'Q UPPER 2,857,113-

' SUCTION NOZZLE FOR CATCHING THREAD ENDS Filed Nov. 2,1954- ,2 hets .-Sneet z INVENTOR. WI HEl-M KJFPER 2,857,113 SUCTION NozzL-E 1:1 61: gATeHING runnin- Wilhelm Kiipper, Erkelenz, Germany; assignor to Dr. Ing. Walter Reiners, Gladbach, Rhineland, Germany Application November 2", 1954, Serial No; 466,395 Claims priority, application Germany November 3; 1953, s'c'nims; er 20:18

The present invention relates to suction nozzles" for catching thread ends, and more particularly to a' suction nozzle provided with a retainingmean's for retaining" a caught thread end.

In winding machines, broken thread ends are caught by suction nozzles which are arranged adjacent the surface of a body of thread so that when the body of'thread is rotated in a direction opposite to the winding direction thereof, a thread end on the body of thread is sucked into the suction nozzle. Frequently a thread end, which has been sucked into the suction nozzle, is again pulled out of the suctionn'ozzle since a portion of the thread end adheres to" the body of thread so that during further rotation of the body of thread the pull exerted by the rotating body of thread on the thread end adhering thereto is greater than the pull enerted by the suction of the suction nozzle. The thread end may adhere to the body er thread bec'aus'ei'tis somehow intertwined with the other thread, or felted therewith.

It is the object of the pre's'ent invention to" overcome this disadvantage of the known suction nozzle arrangement for catching thread ends, and to provide a suction nozzle which is capable of retaining a sucked in thread end, even if the same as felted with the body'of thread.

It is another object of the present invention to provide retaining means on the suction nozzle'which do not obstruct the sucking-in et the thread end, but-engage the sucked-in thread end and retain the thread end when the same tends to move out of the suetion' nozzle.

It is a further object of the presenfinvention to provide in a suction nozzle of the above-described type a retaining means which'exerts friction on the' 'cau'ght thread end. 7

It is a' still further object of the present invention to provide retaining means of the above -d'e's'cr'ibed'type only on the nozzle lip portion which is located rearwardly'in the direction of relative movement between the surface of the body of thread and the suction nozzle so that the thread may easily pass over the forward lip portion of the nozzle into the suction nozzle, but" is retained by the retaining means on the rearwardly located nozzle lip portion.

With these objects in view, the" presentinvention mainly consists in an apparatus for catching; thread ends of a body of thread comprisingdncombination, suction nozzle means; means for moving the surface of a body of wound thread and the suction nozzle means relative to each other so that the suction nozzle nieaiis passes along and exerts suction on the surface of the body of thread whereby thread ends are sucked from the body of thread into the suction nozzle means;- and retaining means on the suction nozzle means for retaining a thread end sucked into the'suction nozzlemean's so as to prevent pulling out of a sucked-in thread end during continued relative movement between the body of thread and the suction nozzle means.

According to a preferred embodiment of th'e present rammed Oct. 21, 1958 invention the bodyof thread is rotated so that the surface of the body of thread passes an annular edge of a suction opening spaced a short distance from the same; The leading edgetportion of the annular edge located forwardly in direction of movement of the surface of the body of thread is smooth, whereas the trailing lip portion located rearwardly with respect to the direction of movementofthe surface of the thread body is provided with-retaining means which increase the friction on the caught thread end.

According to one embodiment of the present invention the trailing edge portion is roughened. According to another embodiment of the present invention a needle means is provided on the trailing edge portion. Preferably, the needles of the needle means extend at an acute angle with respect to the direction inwhich the sucked-in air moves in the suction nozzle and point inwardly into the suction nozzle so that a sucked-in thread is not obstructed during inward movement due move outwardly material attached to the edge of the suction nozzle for increasing the friction exerted on the'sucked-in thread end. I

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, to-

gether with additional objects and advantages thereof,

will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:

Fig. 1 is a fragmentary side view, partly in section, of an embodiment of the present invention;

Fig. 2 is a fragmentary side view, partly in section, of the embodiment illustrated in Fig. 2 in a-different operational position;

Fig. 3 is an end view of the suction nozzle shown in the embodiment of Figs. 1 and 2;.

Fig.4 is an end view of a suction nozzle according to a modified embodiment of the present invention taken in the direction of the arrow 4 in Fig. 5;

Fig. 5 is a sectional view of a suction nozzle according to a modified embodiment of the present invention;

Fig. 6 is a sectional view of a suction nozzle according to another embodiment of the present invention;

Fig. 7 is an end view of asuction nozzle illustrated in Fig. 6 taken in the directions of the arrow 7; and

Fig. '8. is a sectional view of a suction nozzle according to a further embodiment of the present invention.

Referring now to the drawings and more particularly to Figs. 1 and 2, a body of thread 1 is mounted on a rotatable support 1a and is rotated by a drive roller 2 which engages the surface 15 of the wound body of thread. Consequently, the drive roller 2 constitutes a mean'sfor moving thev surface 1b and the suction nozzle '3 relative to eachother. The body of thread "1 is wound ina' direction opposite the direction of'the-arrow 4, but duringoperation' of drive roller 2 rotates in the direction ofthe arrow 4a so that the body of thread is rotated in'the direction ofvthe' arrow 4 opposite to th direction in which the thread is wound thereon.

The "suctionnoz'zle 3 is arranged adjacent the drive roller 2 and has an annular edge 8" including a leading edge portion 821' located forwardly in the "direction of movement of the surface lb of the body at thread;

to the direction of movement of the surface 1b of 'the' body of thread.

A thread end is sucked into thesuction nozzle when theportion ofthe surface 112 in which the thread end is located passes the annular edge 8 of the suction nozzle.

However, when the thread end 5 is" intertwined at the point A with thread of the body of thread. 1, further rotation of the body of thread 1 in the direction of the arrow 4 may effect pulling out of thejthread end 5 since the suction exerted by the suction nozzle 3 may be insufficient to pull the thread end S from the intertwined point A. M I

As the body of thread 1 continues its rotation and moves from the position shown in Fig. 1 to the position shown in Fig. 2, the point A moves into the position A. The thread end 5 engages the retaining means 7 provided on the trailing edge portion 8a so that the friction exerted by the retaining means 7 is added to the suction force of the suction nozzle 3. While the suction alone may be insufficient to loosen the thread at the point A, the retaining rneans 7 according to the present invention retains the thread so. that further movement of the body of thread will cause at the point A separation of the thread from the body of thread, whereupon the thread end 5 is sucked further into the suction nozzle.

The retaining means 7 illustrated in Figs. 1 and 2 is a strip of emery paper or sandpaper. The thread end 5 engaging the surface of the retaining means 7 is held by the friction of the rough surface so that it cannot be pulled out of the suction nozzle 3. After the thread has been separated at the point A from the body of thread, the suction in the suction nozzle 3 is sufiicient to pull the thread end 5 off the rough surface of the retaining means 7.

Fig. 3 illustrates the annular edge 8 of the suction nozzle 3 on an enlarged scale. The sheet of sand or emery paper 7 is attached to the trailing edge portion 8a of the suction opening while the leading edge portion 8b is smooth so that the sucked-in thread easily passes over the leading edge portion 8b into the suction nozzle 3.

' Another embodiment of the retaining means is illustrated in Figs. 4 and 5. It will be understood that the general arrangement in which the retaining means according to these figures is used corresponds to Figs. 1 and 2. However, the retaining means illustrated in Figs. 4 and 5 is a needle comb 7a whoseneedles extends at an acute angle to the direction of the flow of air in the I suction nozzle 3. Moreover, the needles of the needle comb 7a point inwardly into the nozzle as best seen in Fig. 5. Fig. 5' illustrates a position corresponding to the position illustrated in Fig. 2. The point A has moved beyond the trailing edge 8a of the suction nozzle, and consequently, the thread end 5 is pulled into the needle comb so that the needles of the same impale and retain the thread end 5. Consequently, the thread end 5 is separated from the body of thread at the point A during further rotation of the body of thread 1. After such separation has taken place, the suction of the suction nozzle is sufiicient to separate the thread end 5 from the needle comb since the needles extend inwardly in the direction of the flow of air. I

In the embodiment illustrated in Figs. 6 and 7, the trailing edge 8a of the suction nozzle 3 is provided with a series of wedge-shaped grooves 8a'.. When the thread end 5 is drawn into one of the wedge-shaped grooves 801 it is slightly clamped at the bottom of the grooves so that the thread end is retained and separated at the point A from the body of thread.

In the embodiment illustrated in Fig. 8, the resilient clamping means is 'secured to the edge portion 8a and engages the opposite surface of the nozzle means. The end of the clamping means is provided with a member 9a rough surface.

4 which is either a rubber body or a member having a It is also contemplated to provide very short teeth or needles on the member 9a, which however are considerably shorter than the needles provided in the embodiment illustrated in Fig. 5.

It will be understood tha t each of the elements described above, or two or more together, may also find a useful application in other types of suction nozzles differing from the types described above.

While the invention has been illustrated and described as embodied in a suction nozzle for catching'thread ends and provided at the trailing edge thereof with a retaining means for retaining sucked-in thread ends, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. In a winding machine, an apparatus for catching thread ends of a body of thread comprising, in combination, suction means formed with a suction opening having an edge including a first edge portion, and an oppositely arranged second edge portion means for moving a body of wound thread and said suction means relative to each other so that said suction opening passes along the surface of said body of wound thread with said first edge portion thereof leading and said second edge portion thereof trailing with respect to said body of wound thread whereby thread ends are sucked from the body of thread into said suction means along said first leading edge portion and tend to leave said suction opening along said second trailing edge portion thereof; and retaining means on said second trailing edge portion for retaining a thread end sucked into said suction opening so as to prevent pulling out of a sucked-in thread end during continued relative movement between said body of thread and said suction means.

2. In a winding machine, .an apparatus for catching thread ends of a body of thread comprising, in combination, suction nozzle means formed with a suction opening bounded by an annular edge including a first edge portion and an oppositely arranged second edge portion; means for rotating a body of wound thread arranged with respect to said suction nozzle means in such manner that the surface of a rotated body of thread passes first over said first edge portion and then over said second edge portion whereby thread ends are sucked from the body of thread into said suction opening along said first edge portion and tend to leave said suction opening along said second edge portion thereof; and retaining means on said second edge portion for retaining a thread end sucked into said suction opening so as to prevent pulling out of the sucked-in thread end during continued movement of said surface of said body of thread.

3. In a winding machine, an apparatus for catching thread ends of a body of thread comprising, in combination, suction nozzle means formed with a suction opening bounded by an annular edge including a first edge portion and an oppositely arranged second edge portion; means for rotating a body of wound thread arranged with respect to said suction nozzle means in such manner that the surface of a rotated body of thread passes first over said first edge portion and then over said second edge portion whereby thread ends are sucked from the body ofthread into said suction opening along-said first edge portion and tend to leave said suction opening along said second edge portion thereof; and retaining means on said second edge portion for exerting friction on the thread end and for retaining a thread end sucked into said suction opening so as to prevent pulling out of the suckedin thread end during continued movement of said surface of said body of thread.

4. In a winding machine, an apparatus for catching thread ends of a body of thread comprising, in combination, suction nozzle means formed with a suction opening bounded by an annular edge including a first edge portion and an oppositely arranged second edge portion;

, means for rotating a body of wound thread arranged with respect to said suction nozzle means in such manner that the surface of a rotated body of thread passes first over said first edge portion and then over said second edge portion whereby thread ends are suckedfrom the body of thread into said suction opening along said first edge portion and tend to leave said suction opening along said second edge portion thereof; and retaining means having a rough surface and being secured to said second edge portion and partly located within said suction nozzle means for retaining a thread end sucked into said suction opening so as to prevent pulling out of the sucked-in thread end during continued movement of said surface of said body of thread.

5. In a winding machine, an apparatus for catching thread ends of a body of thread comprising, in combination, suction nozzle means formed with a suction opening bounded by an annular edge including a first edge portion and an oppositely arranged second edge portion; means for rotating a body of found thread arranged with respect to said suction nozzle means in such manner that the surface of a rotated body of thread passes first over said first edge portion and then over said second edge portion whereby thread ends are sucked from the body of thread into said suction opening along said first edge portion and tend to leave said suction opening along said second edge portion thereof; and a needle comb means including needles projecting inwardly into said suction nozzle means for retaining a thread end sucked into said suction opening so as to prevent pulling out of the sucked-in thread end during continued movement of said surface of said body of thread.

6. In a winding machine, an apparatus for catching thread ends of a body of thread comprising, in combination, suction nozzle means formed with a suction opening bounded by an annular edge including a first edge portion and an oppositely arranged second edge portion, said second edge portion being formed with a plurality of wedgeshaped grooves; means for rotating a body of wound thread arranged with respect to said suction nozzle means in such manner that the surface of a rotated body of thread passes first over said first edge portion and then over said second edge portion whereby thread ends are sucked from the body of thread into said suction opening along said first edge portion and tend to leave said suction opening along said second edge portion thereof so that said grooves in the same are adapted to engage and to retain a thread end sucked into said suction opening so as to prevent pulling out of the sucked-in thread end during continued movement of said surface of said body of thread.

7. In a winding machine, an apparatus for catching thread ends of a body of thread comprising, in combination, suction nozzle means formed with a suction opening bounded by an annular edge including a first edge portion and an oppositely arranged second edge portion; means for rotating a body of wound thread arranged with respect to said suction nozzle means in such manner that the surface of a rotated body of thread passes first over said first edge portion and then over said second edge portion whereby thread ends are sucked from the body of thread into said suction opening along said first edge portion and tend to leave said suction opening along said second edge portion thereof; and retaining means including resilient clamping means secured to said second edge portion and resiliently engagingthe inner surface of said suction nozzle means so as to be adapted to engage and clamp a thread end sucked into said suction opening so as to prevent pulling out of the sucked-in thread end during continued movement of said surface of said body of thread.

8. In a Winding machine, an apparatus for catching thread ends of a body of thread comprising, in combination, suction means formed with a suction opening having an edge including a first edge portion, and an oppositely arranged second edge portion; means for moving a body of wound thread and said suction means relative to each other so that said suction opening passes along the surface of said body of wound thread with said edge portion thereof leading and said second edge portion thereof trailing with respect to said body of wound thread whereby thread ends are sucked from the body of thread into said suction means along said first leading edge portion and tend to leave said suction opening along said second trailing edge portion thereof; and retaining means having a rough surface and located on said second trailing edge portion for retaining a thread end sucked into said suction opening so as to prevent pulling out of a sucked-in thread end during continued relative movement between said body of thread and said suction means.

References Cited in the file of this patent UNITED STATES PATENTS 1,558,264 Hathaway Oct. 20, 1925 1,887,342 Vickerman Nov. 8, 1932 2,208,930 Kahlisch July 23, 1940 2,267,481 Turner Dec. 23, 1941 2,338,914 Esser et al. Ian. 11, 1944 2,400,963 Turner May 28, 1946 2,431,556 Hooper et al. Nov. 26, 1947 2,482,691 Peterson Sept. 20, 1949 2,758,799 Furst Aug. 14, 1956 FOREIGN PATENTS 6,451 Great Britain Apr. 17, 1884 253,745 Great Britain June 24, 1926