US2440523A

US2440523A - Pneumatic thread holder for multistack magazines

Info

Publication number: US2440523A
Application number: US738861A
Authority: US
Inventors: George N Peterson
Original assignee: Crompton and Knowles Corp
Current assignee: Crompton and Knowles Corp
Priority date: 1947-04-02
Filing date: 1947-04-02
Publication date: 1948-04-27
Anticipated expiration: 1965-04-27

Description

pril 27, 1948. G. N. PETERSON PNEUMATIG THREAD HOLDER FOB MLTISTACK MAGAZINES Filed April 2, 194'/ FIG. I

ATTORNEY wardly from edge 40 toward the magazine and verse of said weft ends and within which subatmospheric pressures exist, said passage having a thread intake mouth formed with a curved surface convex toward the magazine and along which the weft ends of one of said grOups are distributed, and guide means fixed with respectto said holder means spaced from said passage and having a curved edge convex toward the magavzine and farther from the latter than is said

surfaces

52 and 53 which may be in the same plane and are inclined downwardly and generally toward the magazine. Both sets of inclined surl.

faces terminate above the plate 28 as shown in Figs. 4 and 5, although this is not an essential relation, and top edge 42 has its' high point a nearer the magazine than are adjacent parts of the horns, see Figs. 5 and 10.

Fig. 10 illustrates the reasons for the relationships just described. When new bobbins are placed in the magazine their weft ends are drawn toward the holder and passed down between the

horns

23 and 25. The rearmost position whichl can be assumed by any thread in group W is indicated by the light dot and dash line b which passes yin front of point a on plate 28. As this thread slides down surface 5l it descends along edge 42 and slips under cusp like point 55 between edges l2 and 4i@ to the heavy dot and dash line c, and when released will be drawn around the latter edge and into passage 35. Obviously, a thread from group W sliding down surface 5i)v of the front horn will not need to be guided by edge 42'.

Similarly, a thread from rear group W engaging the horn 5o in the position of light solid line d, Fig. 10will slide down surface 50 and be behind pcint a on plate 25. As this thread moves to the heavy solid line position `e it will be drawn into passage 35 along surface 36 when released. Point a is thus seen to be so located relatively to the horns and the directions in which the threads approach holder H from the magazine that the curved surface and along which the weft ends of the other groups are distributed and from which the second group enters said passage spaced from f the rst group.

2. In a pneumatic thread holder for a weft replenishing loom having two groups of weft ends leading from a reserve bobbin magazine, thread holder means containing a thread passage transverse of said weftY ends and within which subatmospheric pressures exist, said passage having a thread intake mouth formed with a curved surface convex toward the magazine and along which the weft ends of one of said groups areA distributed, and'guide means fixed with respect to said holder means spaced from said mouth and threads are automatically separated to lie in thev l corresponding compartment 46 or 41.

From the foregoing it will be seen that the two groups of threads are separated by guide plate 28 and enter passage 35 along separate paths. Also, the threads of each group are separated from each other by the curved edges or surfaces which they engage. The plate 28 divides the space 45 into narrow compartments which by their proportions cause strong drafts of air to pass through them to hold the weft ends in the proper spaced relation. While a reciprocating air pump has been shown, the invention can also be used with a continuous suction. Furthermoraeach thread when cut at the cloth selvage subsequent to transfer of the corresponding bobbin Vcan be drawn promptly into passage 35 with little or no entanglement with adjacent threads. The top of plate 28, particularly the point a, relatively to the

horns

23 and 24 permitan automatic separation of the threads into their proper groups when placed downwardly between the horns, as explained in connection with Fig. 10. I

Having thus described my invention itv will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a pneumatic thread holder for a weft replenishing loom having two groups of weft ends leading from a reserve bobbin magazine, thread holder means containing a thread passage transhaving a curved edge convex toward the magazine and aligned with part Aof said passage spaced from said curved surface in a direction away from the magazine and along which the weft ends of the other group are distributed and from which the second group enters said passage.

3. In a weft replenishing loomliaving a reserve bobbin magazine from which front and back groups of weft ends extend, a pneumatic thread holder including a tube within which subatmospheric pressures exist, said tube having a threadv intake mouth the sider of which nearest to the magazine is curved and convex toward the magazine, the weft ends of the back group being distributed along said curved side of the mouth and entering said mouth and tube, and a plate spaced forwardly from the mouth and having a curved edge. convex toward the magazine along which the weft endsl of the front group are distributed and from which said front groupextends into said mouth and tube along paths beyond said curved side of the mouth with respect to the magazine. v

4. In a weft replenishing loom having a reserve bobbin magazine from which front and back groups of` weft ends extend, a pneumatic thread holder including a tube within which subatmospheric pressures exist and having a thread intake mouthfacing transversely of the weft ends, the side of the mouth nearest to the magazine being curved and convex toward the magazine and having the weft ends of the back group dis,

tributed therealong, and a guide having a curvedA edge concentric with said side of the mouth but farther from the magazine along which the'weft ends of the front group are distributed and from which the front group enters the mouth spaced from the back group.

.Y 5.'In a weft replenishing loom having a re serve bobbin magazine from which front and back groups of weft ends extend,v a pneumatic thread vholder including a tube within which subatmospheric pressures exist, two spaced thread guides having curved edges convex toward the magazine and at different distances from the magazine, the weft ends of the back group being distributed along one of said edges and entering the tube from said one edge, and the weft ends of the second group being distributed along the other curved edge and entering the tube from said other edge and spaced from the rst group.

6. In a weft replenishing loom having a reserve bobbin magazine from which front and back groups of weft ends extend, a pneumatic thread holder including a tube within which subatmospheric pressures exist and having a thread intake mouth, two spaced members defining between them a thread space communicating with the mouth and extending toward the magazine and receiving the two groups of weft ends, and a guide in said space dividing the latter into front and back compartments, the back group entering the back compartment and entering the mouth directly therefrom and the front group entering the front compartment and extending partly around said guide and across the back compartment and then entering the mouth. t

7. In a weft replenishing loom having a reserve bobbin magazine from which front and back groups of weft ends extend, a pneumatic thread holder including a tube within which subatmospheric pressures exist and having a thread intake mouth, spaced members defining between them a thread space communicating with the mouth and extending toward the magazine and receiving the two groups of weft ends, a guide in said space dividing the latter into front and back compartments, the back group entering the back compartment and entering the mouth directly therefrom and the front group entering the front compartment and extending partly around said guide and across the back compartment and then entering the mouth, said guide being so located as to cause said front group to enter said mouth spaced from the back group in a direction away from the magazine.

8. In a weft replenishing loom having a reserve bobbin magazine from which front and back groups of weft ends extend, a pneumatic thread holder including a tube within which subatmospheric pressures exist and having a thread intake mouth, front and back spaced members defining between them a thread space communicating with said mouth and extending toward the magazine, and a guide between said members dividing the space into front and back compartments, the weft ends of the back group entering the back compartment and bending laterally to enter said mouth directly and the weft end of the front group entering the front compartment and bending laterally around said guide and extending across said back compartment and then entering the mouth.

9. In a weft replenishing loom having a reserve bobbin magazine from which front and back groups o1 weft ends extend, a pneumatic thread holder including a tube within which subatmospheric pressures exist and having a thread intake mouth, front and back spaced members defining between them a thread space communieating with said mouth and extending 'toward the magazine, and a vertical separat-or between said members lying between said groups of weft ends and having a top edge inclined upwardly and toward the magazine, weft ends drawn from both of said groups when moved down between said members engaging said separator and being separated thereby into their respective groups, one for said back compartment and the other for said front compartment.

10. In a weft replenishing loom having a reserve bobbin magazine from which front and back groups of weft ends extend, a pneumatic thread holder including a tube within which subatmospheric pressures exist and having a 'thread intake mouth, front and back spaced vertical members defining between them a thread space communicating with said mouth .and extending toward the magazine, and a guide between said member dividing the space into front and back compartments, said guide having a top edge inclined upwardly and toward the magazine, a weft end derived from either group when moved down along the member corresponding to the other group engaging said top edge and being deected thereby toward the compartment corresponding to the weit end.

11. In a weft replenishing loom having a reserve bobbin magazine from which front and back groups of weft ends extend, a pneumatic thread holder including a tube within which subatmospheric pressures exist and having a thread intake mouth, front and back spaced vertical members defining between them a thread space communicating with said mouth and extending toward the magazine, and a guide between said member dividing the space into front and back compartments, said guide having a top edge inclined upwardly and toward the magazine, a weft end of the back group when moved down along the front member engaging said top edge and being deected thereby toward the back compartment, and a weft end of the front group when moved down along the back member engaging said top edge and being deflected thereby toward the front compartment.

GEORGE N. PETERSON.

REFERENCES CITED The following references are of record :in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,360,177 Turner Oct, 10, 1944 2,387,302 Santori Oct. 231, 1945 2,401,593 Wakefield June 4, 1946