US2760330A

US2760330A - Method of making a resilient twisted band

Info

Publication number: US2760330A
Application number: US292846A
Authority: US
Inventors: William J Lowney
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-06-11
Filing date: 1952-06-11
Publication date: 1956-08-28
Anticipated expiration: 1973-08-28

Description

- Aug. 28, 1956 2,760,330

METHOD OF MAKING A RESILIENT TWISTED BAND Filed June 11, 1952 W. J. LOWNEY IN VEN TOR.

BY l mma/gm.

United States Patent METHOD OF MAKING A RESILIENT TWISTED BAND William J. Lowney, Raeford, N. C.

Application June 11, 1952, Serial No. 292,846

2 Claims. (CI. 57-158) This invention relates to certain novel improvements in garment supporters of the twisted covered rubber thread type used to encircle the limb of the wearer.

It is among the objects of this invention to provide a resilient twisted rope band made from twisted covered rubber or elastic thread which will be extremely flexible and yieldable and which will be particularly adapted for use with hook-on boot bands.

Another object of the invention is to provide a new article of manufacture of the above described character which may be made from twisted covered rubber or elastic covered thread.

Another object of the invention is to provide a new article of manufacture consisting in the stretching of a length of bare elastic thread to a predetermined tension, and maintaining this tension while the elastic thread is covered with two coverings of either cotton, rayon or nylon, or both. The undercovering is wrapped on the bare elastic thread in one direction, while the outer covering is wrapped on the first wrapping in a reverse direction.

It is a further object of this invention to provide a new article of manufacture comprising a balanced covered elastic thread, which will lay straight without twists or kinks, and possess maximum strength.

Other objects will become apparent as the invention is more fully set forth.

For a clearer understanding of the invention and the objects thereof, reference is made to the accompanying drawings, wherein a particular form of the invention is indicated. These drawings when used in conjunction with the following description serve to illustrate the invention, its principles and the operation thereof, while the claims indicate the scope thereof.

In the drawings:

Figure 1 is a perspective view of the boot-band embodying this invention;

Figure 2 is an enlarged section of the elastic thread showing its reverse wrappings;

Figure 3 is a side elevation of the machine used for twisting the elastic covered threads after they have been 1 formed into a loop, the loop being shown in full lines on the hooks, ready for the first operation;

Figure 4 is a plan view of Figure 3; and

Figure 5 is a diagrammatic view of the twisting operations used to produce the boot-band.

Similar reference numerals indicate the same parts throughout the drawings.

In the construction of the hook-on boot-bands, a length of bare elastic thread is stretched to a specified tension, and the tension is maintained while the elastic thread 10 is covered with a covering 11 preferably of cotton thread termed the under covering and wrapped on the elastic thread in one direction, while the outer covering 12 preferably of nylon or rayon yarn or thread is wrapped on the under covering in an opposite direction. This produces a balanced covered elastic thread, which will lay straight without kinks or twist and which will have maximum strength. The amount of stretch in the 7 2,760,330 lifatented Aug. 28, 1956 finished covered thread can be regulated by the amount of tension placed on the bare rubber or elastic thread while it is being covered, and this is controlled by a feeding device, and a pull up device on a conventional thread covering machine (not shown).

The covered elastic thread 14 is formed into a loop 15 by winding on a conventional reel (not shown) to give the length of loop desired. The loop of covered elastic thread 14 (see diagram A) is stretched between a rotatable hook 16 mounted in a head stock 17 and the other end is attached to a stationary hook 18 mounted in a tail stock 19. The hook 16 is then rotated one revolution in a clockwise direction for the first twist. The end of the loop is then removed from the hook 18, and without releasing the twist is then brought over and around the center rod 20, and placed on the hook 21 (see diagram B). The other end of the loop is then removed from the hook 16 and placed on the hook 21 (see diagram C). The net effect of these steps is to fold the twisted loop about its middle around the center rod as clearly shown in diagrams B and C of Figure 5. A second twist consisting of onehalf revolution is then applied in a counterclockwise direction, by rotating the hook 21. The result of this action is to twist both halves of the band together. The last mentioned twist is applied in a direction counterclockwise to that imparted originally in order to create a substantial state of balance in the finished article, since after folding the tendency to unwind in both halves of the band is exerted in opposite directions. By applying a twist in the folded band only half that of the original twist and in an opposite direction, the aforesaid state of balance is substantially obtained. The closed book 23 is placed through the ends of the band at one end on the hook 21, sealing the twist. An open hook 24 is placed in the opening in the loop in the opposite end. The band 14 is then impregnated with a rubber latex, which protects it against moisture and improves the wearing qualities of the band. The machine used for twisting the loop into the boot band preferably comprises

rotary shafts

26 and 27 attached to the rotatable hooks 16 and 21 respectively, and mounted in a head stock 17.

Gears

28 and 29 drive the hooks 16 and 21 in opposite directions with a ratio of 2 to 1, by a motor 30 through the operation of its pulley 31, belt 32 and pulley 33 attached to the shaft 26. The revolutions of the hooks are recorded on a counter 34 to control the amount of twist in each band. The head and tail stock are mounted on a base plate 22.

While but one general form of the invention is shown in the drawings and described in the specification, it is not desired to limit this application for patent to this particularly form as it is appreciated that other forms of construction could be made that would use the same princi ples and come within the scope of the appended claims.

Having thus described the invention, what is claimed is:

l. The method of preparing a hook-on boot band comprising selecting an elastic thread and tensioning same, wrapping a covering on the elastic thread, while so tensioned, in one direction, wrapping a top covering on the first covering and in an opposite direction, forming a loop with said covered thread, twisting said loop in one direction while under tension, folding the twisted loop about its center to form two equal parts while the tension is maintained, twisting the folded loop in a direction opposite to the original twist and, said twisting being also of a lesser amount than the original twist, then sealing the two adjoining ends together and sealing the opposite end, to form a band.

2. In the method set forth in claim 1, the added step of impregnating the band with rubber latex.

(References on following page) References Cited'in 'the'file of this fiatent UNITED STAIES PATENTS 7 3,662 Culver Nov. 23, 1915 12,490 Swansea 5 -Ailg. 6, 1 918 263576 Arnold JMai. 1,319.33 5 656,824 Shnller N WEZZ 1949 Cres'by et al.- j Mar; 14; 1950 4 V FOREIGN PATENTS Great Britaigi of 1813 Great Britain of 1849 Germany Aug. 15, 1913 Germany Feb. 22, 1938