US2705977A

US2705977A - Loom reed

Info

Publication number: US2705977A
Application number: US386216A
Authority: US
Inventors: Matthews La Verne Allen
Original assignee: EXCELSIOR LOOM REED WORKS Inc
Current assignee: EXCELSIOR LOOM REED WORKS Inc
Priority date: 1953-10-15
Filing date: 1953-10-15
Publication date: 1955-04-12
Anticipated expiration: 1972-04-12

Description

April 12, 1955 LA VERNE A. MATTHEWS 2,705,977

LOOM REED Filed (Jet. 15, 1953 INVENTOR. LAVERNE' A. MATTHEWS ATTORNEYS United States Patent LOOM REED La Verne Allen Matthews, Barrington, R. L, assignor to Excelsior Loom Reed Works, Inc., a corporation of Rhode Island Application October 15, 1953, Serial No. 386,216

3 Claims. (Cl. 139-192) This invention relates to reeds suitable for use in the shedding mechanism of looms. The invention is particularly concerned with a type of reed which is used to beat up the filling in the weaving process and which controls the warp threads that pass between the dents thereof. In prior art construction, when several warp ends pass between a pair of dents, there is a tendency for the individual warp ends to stick together, which is thought to be caused by the particular size used in the yarn. Thus when the reed beats up the cloth, the warp ends that are stuck together will tend to streak the finished cloth. Warp streaks are also thought to be caused by the separation of the drop wires and harness and it is quite common for the streaks of warp ends to stay in the same relation to each other from the back of the loom to the finished cloth. Furthermore, a common cause of warp streaks results from the reed itself due to unequal spacing between the dents.

It is, therefore, one of the objects of the present invention to prevent the warp ends from sticking together.

It is a further object of the invention to shake the warp ends back into proper spacing, due to separations of drop wires and harness.

A still further object of the invention is to overcome improper spacing of dents ordinarily mounted in a perpendicular position.

A more specific object is to slant the dents from a perpendicular to an offset position so the warp ends will tend to be rolled or wagged by the slanting dents, as these warp ends pass up and down in the reed and are forced first to the left and then to the right.

In the accompanying drawings:

Figure 1 is a plan view of a reed in accordance with this invention;

Figure 2 is a partial plan view on an enlarged scale, showing the heading end of the reed;

Figure 3 is a sectional view taken on line 3-3 of Figure 2, showing the separating springs and spacer rods holding the dents in position; and

Figure 4 is a sectional view taken on line 4--4 of Figure 3, showing a preferred shape of the dents.

According to the present invention, the reed comprises a plurality of dents, which are slanted with respect to the backs of the reed, the dents being spaced from each other in the backs or lengthwise direction of the reed to allow for the free passage of threads between the dents. The individual dents are spaced in the usual manner by means of spacers or springs near the ends thereof and are held under a great amount of tension so that the separation between the adjacent dents will remain uniform under the stress of the various warp ends tending to bend the dents. By slanting the dents, more uniformity of space between dents can be accomplished.

With reference to the drawings, generally designates a reed according to the invention, which is built up from a plurality of dents 11. The dents 11 are assembled between two backs 12 which each comprise two strips of material 12a, 12b that form a space therebetween. The ends of the dents 11 are held within the hollow portion of the backs by means of solder 13,

as shown in Figure 3. The requisite spacing of the dents is attained by fitting near each end of the dents and adjacent the backs helically coiled wires 14 and 15. The pitch of the coils 14 and 15 is equal having been adjusted to the desired value in the manufacturing process and semi-circular spacer rods 16 are placed between the edges of the dents 11 and the circular section of the coils 14 and 15 so as to hold the edges of the dents in parallel relationship.

The dents 11 are formed of thin steel strips of about one quarter inch in width, the thickness of the dents being small so as to provide a maximum amount of space between the dents for thread movement. An extremely smooth surface is imparted to each individual dent so as not to endanger the individual warp ends or filaments and the dents are held between the backs 12 under considerable tension, so that there is little if any flexibility in the individual dents. Specially shaped oval wire dents, as shown in Figure 4, are preferably used to prevent cutting the warp ends as they are moved from one side to the other. As shown in Figures 1 and 2, the complete reed structure additionally includes headings 18 which are secured between the strips 12a, 12b of the backs 12 by means of suitable fastenings such as rivets 20 and include a slanted edge 19, which conforms to the degree of slant imparted to the individual dents 11. Specifically, it has been found that if the slant is between and V from the perpendicular, good results may be had. In a preferred method of assembly, the dents are placed between the backs in a perpendicular relationship and then slanted. As is readily apparent, this effectively tends to tighten the dents over further for a fixed back spacing and effect a more regular spacing over a longer period of time before the dents stretch sufficiently to become loose.

Warp ends pass betweenadjacent dents with perhaps two or three warp ends being contained in each space, depending upon the type of cloth being woven. As the reed moves forward in the loom to beat up the filling left by the passage of the shuttle, the slanted relationship of the dents will tend to roll the warp ends by moving the individual warp ends up and down between the individual dents. This action tends to wag the warp ends and separate them should there be any tendency for the ends to stick together. As will be readily apparent, the up and down movement of the individual warp ends between the dents will cause a relative sidewise movement between the individual warp ends rel ative to the harness which wags the individual ends eliminating any necessity of manual correction by the loom operator.

I claim:

1. A reed for a loom, said reed having backs and headings, a plurality of parallel dents between said backs, .the longitudinal extent thereof being disposed at an oblique angle to said backs and spaced apart in a fixed relationship to allow threads to pass therebetween.

2. A reed as in claim 1 wherein said dents have an oval cross section.

3. A reed for a loom comprising two parallel spaced backs, a plurality of parallel dents arranged at an oblique angle lengthwise of the dents with reference to a longitudinal vertical plane passing through said backs, said dents being spaced apart in a fixed relationship to allow threads to pass therebetween.

References Cited in the file of this patent UNITED STATES PATENTS 534,229 Reixach et a1. Feb. 12, 1895 696,325 Gable Mar. 25, 1902 921,236 Gourdeau May 11, 1909 1,686,448 Hargrove et a1. Oct. 2, 1928 2,048,001 Fish July 21, 1936