US3344812A

US3344812A - Looms with stationary weft supply

Info

Publication number: US3344812A
Application number: US540544A
Authority: US
Inventors: Duran Magin Desveus
Original assignee: Individual
Current assignee: Individual
Priority date: 1965-04-06
Filing date: 1966-04-06
Publication date: 1967-10-03
Anticipated expiration: 1984-10-03
Also published as: BE681542A; ES311799A1; CH459914A; GB1142031A

Description

M. D. DURAN Oct. 3, 1967 LOOMS WITH STATIONARY WEFT SUPPLY 2 Sheets-Sheet 1 Filed April 6, 1966 INVENTOR:

MAG/N DESVEUS OUR/UV yam 923m ATTORNEY Oct. 3, 1967 M. D. DURAN LOOMS WITH STATIONARY WEFT SUPPLY Filed April 6, 1966 2 Sheets-Sheet 2 INVENTOR; MA Gl/V 0551/5115 DURAN ATTORNEY United States Patent 3,344,812 LOOMS WITH STATIONARY WEFT SUPPLY Magin Desveus Duran, San Olegario 35, Sabadell, Spain Filed Apr. 6, 1966, Ser. No. 540,544 Claims priority, application Spain, Apr. 6, 1965, 311,799 6 Claims. (Cl. 139123) The present invention relates to looms with a stationary weft supply, and more particularly to rapier looms. In a rapier loom, weft insertion is carried out by a rapier, which is projected into the warp shed from one side to carry a loop or strand of weft into the shed. The rapier has to be guided and for this purpose, it is known to provide a series of guides on the sley, each guide being formed with a horizontal slot or recess in which the rapier slides, the guides being relatively narrow and having rounded tops, to allow warp threads to pass down each side of the guides into the lowered shed position. In this known arrangement alternate guides are placed on opposite sides of the rapier path, the slots of all the guides on each side being aligned to provide an effective guide across, the width of the loom.

It is a disadvantage of the known arrangement that the rapier tends to wear the ends of the slots, thereby cutting the slots deeper so that eventually the tops of the guides break off, and the guides have to be replaced frequently. The object of this invention is to overcome this disadvantage.

According to this invention a guide element for the rapier of a rapier loom has an open-ended horizontal slot with converging sides. With such a guide element it is possible to make the rapier head of such a thickness that the edges of the head engage on the converging sides and the head does not engage with the end of the slot.

Preferably, the slot is V-shaped and it is also preferred to make the edges of the rapier head V-shaped, with the sides of the slot at a more acute angle to each other than those of the V-shaped edge of the rapier head.

According to a further preferred feature of the invention, the strap to which the head of the rapier is connected is narrower than the head so that it does not wear the edges of the slots in the guide members.

One construction of guide means for the rapier in a rapier loom will now be described by way of example only, with reference to the accompanying drawings, in which:

FIGURE 1 is a plan view of the head end of a rapier,

FIGURE 2 is a cross-section through a rapier loom sley, with a rapier head in a projected position,

FIGURE 3 is a detailed front view of a guide element, and

FIGURE 4 is a plan view of the parts shown in FIG- URE 2.

Referring to FIGURE 1, there is shown a rapier for a loom comprising a metal head 1 to which is attached a hook device (not shown) which carries the weft through the shed of the warp threads. The hook is not described here, because it forms no part of the present invention, and there are various types of hooks which could be carried by the rapier. A steel strap 2 is fixed at one end to the head 1, the other end being anchored on the rapier drive mechanism (not shown). The strap 2 has to be long enough to allow the rapier head to carry the weft the required distance into the shed; but it will be noted that it is considerably narrower than the head 1, and it is also thinner.

The edges 3 and 4 of the head are double bevelled to produce an edge portion of substantially V-shaped crosssection (see FIGURE 2).

Referring now to FIGURES 2, 3 and 4, the loom sley 3,344,812 Patented Oct. 3, 1967 15 carries a series of rapier guide elements 5, which are arranged across the full effective length of the sley, in abutting relationship (see FIGURE 4) the elements being secured to the sley by screws 11. Each element 5 comprises a base portion 12, and an upstanding lug 13, the lugs being tapered *(see FIGURE 4) and rounded on top (see FIGURE 3) to allow warp threads to divide easily on each side of the lug. An open ended slot 6 is formed in the upper part of each lug 13, and it will be noted that alternate elements 5 are set with their lugs on opposite sides. This arrangement enables all the slots 6 on each side of the sley to provide an effective guide for the edge of the rapier head. Each element 5 is made in nylon or other hard wearing material.

The slots 6 are V-s'haped, with substantially horizontal top faces 7, curved upwardly at their inside ends, and flat downwardly and inwardly sloping bottom faces 8. The faces of the slots 6 make more acute angles with each other than the bevelled edges 3 and 4 of the rapier, and the dimensions of the slots are such that the rapier head engages with the

faces

7 and 8 but does not penetrate to the inner end 9 of each slot. This prevents the head wearing the slot deeper than it is originally formed and so reducing the width of material 10 in the lug 13 between the slot 6 and the opposite edge of the lug.

In practice there may be a certain amount of play between the head 1 and the

faces

7 and 8 of the guide slots so that the head will tend to rest on the faces 8; but the dimensions must still be such as to prevent engagement of the edges of the rapier head with the bottoms 9 of the slots.

I claim:

1. A rapier guide element for a rapier loom wherein at least one side of said rapier has a longitudinally extending bevelled side edge, said element having a hori zontally open slot having outwardly diverging upper and lower sides for slidably engaging said bevelled rapier edge.

2. The guide element defined in claim 1, wherein the relative angularity of the contacting surfaces of said slot sides and the bevelled side edge of said rapier is such that said rapier does not engage the apex of the slot.

3. The guide element defined in claim 2, wherein said slot is V-shaped and its sides extend to enclose an acute angle less than the angle between the bevelled rapier side edge surfaces.

4. In a rapier loom, rapier guide means comprising a series of guide elements arranged along the sides of the rapier path, each of said guide elements having a horizontally inwardly open slot with divergent sides for slidable engagement with said rapier, and in combination therewith a rapier of such cross section that its opposite side surfaces extend into said slots to slidably engage the slot sides without engaging the bottoms of said slots.

5. In the rapier loom defined in claim 4, said slot sides each defining an acute angle, and said opposite side surfaces of said rapier having bevelled contacting surfaces defining an acute angle larger than said slot side angle.

6. In the rapier loom defined in claim 4, a strap secured to said rapier, the width of said strap being sufficiently small that it does not engage said slot sides.

References Cited UNITED STATES PATENTS 2,316,703 4/ 1943' Moessinger 139188 3,263,707 8/1966 Kubelka et a1 1'39'l22 3,299,9 1 1 1 1967* Dewas 139123 MERVIN STEIN, Primary Examiner.

H. JAUDON, Assistant Examiner.

Claims

1. A RAPIER GUIDE ELEMENT FOR A RAPIER LOOM WHEREIN AT LEAST ONE SIDE OF SAID RAPIER HAS A LONGITUDINALLY EXTENDING BEVELLED SIDE EDGE, SAID ELEMENT HAVING A HORIZONTALLY OPEN SLOT HAVING OUTWARDLY DIVERGING UPPER AND LOWER SIDES FOR SLIDABLY ENGAGING SAID BEVELLED RAPIER EDGE.