US2557343A - Packing cord, beading cord, edge roll, or the like - Google Patents

Description

W. S. COOK June 19, 1951 PACKING CORD, BEADING CORD, EDGE ROLL OR THE LIKE Filed Aug. 19, 1948 INVENTOR. [fay/7e 6: ('a /f @mgm Patented June 19, 1951 PACKING .zCGRrD; "BEADI-NG CORD, lEDGE ROLL, OR THE LIKE -Wayne S. Cook, Grand Rapids,"Mieh., assig-norto Sackner-Products, Inc., acorp'ora'tion of Michigan Application August 19, 1948,. Serial No. 45,123

1 This invention relates to improvements in packing cord, beading cord,-edge rollor the like.

The main objects of this invention are: First, to provide a packing cord, beadingcord, edge roll or the like which has relatively high tensile strength, is uniform in dimensions, has a smooth exterior and maybe economically pro-' duced.

Second, to provide a structure of this character which may"beproduced' with minimum waste material.

Further objects relating to detailsand economies of the invention willappear from the description to follow. The invention ispoint'ed out in the claims.

A preferred'embodiment of the invention is illustrated in the accompanying drawings, in which:

Fig. 1 is an enlarged fragmentary view of a packing cord or beading cord embodying my "invention the parts being'-"shown'mainly in conventional 'form.

Fig. 2 is a-cross sectional-View.

Fig. 3 is a fragmentary view illustrating "a fragment of a strip of creped cellulose tissue employed in the forming ofthe bodyportion of the structure.

Fig. 4 is'a conventionalized and enlarged section of a wrappingstrand element of my invention.

In the accompanying drawing the parts are shown in conventionalized form owing to the difiiculti in illustrating 'inproper -proportions. The product or material o'f'myinvention' is variously designated as packing'cords, beading cords, edge rolls and the like, depending'upo'n theparticular use to which it is to be put.

While structures embodying-"my invention are particularly desirable whenused as packing cords or beading cords it should be understood that my invention may be embodied in materials for various uses. A structure of the generalcharacter of my invention is illustrated inthe Sackner Patent No. 1,821,582, issued September "1, 1931. That patent discloses 'cords made up 'of'layers'o'f creped sheets or cellulose'wadding or tissue paper compressed into cylindrical forms 'andretained by braided wrapping threads or yarn of cotton.

In the commercialprac'tice of my. invention I form an elongated body I, usually o'f'cylindrical section, from a strip "orstripsof" tissue '2"which is desirably creped and whichiscrumpled transversely and compressed without twistingintoth'e body. Whether one or more stripsare'employe'd depends on the diameter'of the body desired. In

the preferred embodiment of my invention the body is formed of one or more strips of creped tissue which are compressed and crumpled edge wise,-as is indicated in the- Fig. 3, to form' the body I which can be produced of uniform cross section owing to the fact that the strips of the desired width can be employed and are crumpled and compressed "to'make up the body.

The'body is bound into its formed-shape by wrappingstrandst which are braided thereon in open mesh, closely embracing relationflthe strands being partially 'imbedded in the body. 'These strands are in the embodiment illustrated oi flattened cross section and consist of glass fiber filaments formed into the strand and impregnated and coated with wax preferably microcrystalline. The coating may be a mixture of a microcrystalline wax and'a mineral oil. Microcrystalline wax as commonly known in commerce refers only to those waxes usually derived from petroleum which are not brittle or coarsely crystailline, but which are actually microcrystalline and ductile or nonbrittle. Mineral oil may be defined as any oil of mineral origin as petroleum orshale oil or any oil obtained from them by refining. "I'he Wax coats-and binds the glass fiber filaments together and provides a substantially smooth coating for the "strand. This results in astrand having a much greater tensile strength than thread or yarn and also results in a packing or beading cord or edge roll having a very smooth exterior and one of a tensile strength greatly exceeding that-of the packing cord of the Sackner patent referred-to the increase in tensile strength, particularly in the smaller cords or headings, being as high as'75%.

'-A further advantage of the invention is that this superior product may be produced at a reduction in the cost of the Wrapping strand as compared to the thread or yarn heretofore used.

Further advantages result from the fact that the strands slide freely through the guides or eyes of the braidingmachine and there is no accumulation of lint. Thestrands maybe applied successfullywith-a considerablygreater'tension than is possible with'th'e cotton cord or-strands'commonly used. At the same time, the structure is flexible and resilient. The wrapping strands are not .materially weakened when wet and the stretchability is not. increased by wetting. While it is not ordinarily contemplatedthat thesepacking cords, beading cords, edge rolls and the-like s'hould'be subjected to any considerable amount of moisture somewhat they are sometimesused in conditions where parts may become wetand they are affected by humidity conditions and changes. Impregnation and coating the strands with microcrystalline wax is advantageous over ordinary wax or parafiin in that it permits substantial bending and fiexing of the strands under substantial tension without fraying or separation of the glass fibers, particularly at the ends thereof, such fraying or separation of the fibers tending to weaken the strands. It holds the fibers of the strands together during production operations, especially where breaks may occur and adapts the cord braided therewith to a wide variety of uses particularly when subject to severe bending or flexing stresses over a considerable period of time. Coating and impregnating the glass strands with the micro crystalline wax, also desirably combines lubrication for passage of the strands through the braider and provides tacki ness to hold the yarn on the braider cops and on the final product.

The increased tensile strength of the product permits its being more readily applied and even when undue stress is applied such stress is effectively resisted and it does not objectionably vary the diameter. Rupturing of the body material is minimized owing to the protection afforded by the wrapping or winding strands. After the cord is formed as described it may be shaped into flattened or oval or other cross section and maintains the shape into which it formed.

I would again point out that the drawings are mainly conventionalized and illustrate a practical embodiment of my invention. A structure of the dimension illustrated in Fig. 1 might be used for an edge roll for upholstery and the like. My invention, however, is of particular value when embodied in the smaller packing and edging cords which are produced in large quantities ranging from 1%" to /2" although there is large production in cords of other diameters. It will be understood that the illustrations are not intended to be in proper proportions either as to the material constituting the body or the fiber glass filaments of the wrapping strand. Instead of using individual strips or sheets of creped tissue the cellulose wadding may be used, this consisting of a plurality of sheets of'very thin cellulose tissue more or less interlocked by superimposing one upon another.

It is desired to emphasize that the packing cords, beading cords and the like of this invention have a very smooth surface inasmuch as the relatively fine strands permit braiding with such tension that they are substantially imbedded in the body material of the cord. At

the same time, the thread or strand results in a very strong cord or the like. Cotton and other cords commonly used do not become substantially imbedded into the filler or body material and this results in a rough surface particularly where the threads cross each other.

In the applicants structure the surface is, as stated, substantially smooth throughout. The additional smoothness and additional tensile strength permits the cord material to be pulled easily through a welded seam or the like. Also the applicants strand is very much less than cotton cords and other strands heretofore used in various relations. The smooth surface has a very decided advantage when the cord is used in connection with sheer or thin materials and it permits plastic coatings and coverings in various embodiments of the cord. This is not practical where cotton threads or cords are used 4 as the coating with plastic would result in a rough and uneven surface.

The strands may be formed of strands or yarn commercially known as Fiberglas. I desire to point out, however, that the Fiberglas strands without being impregnated and coated with the wax as I have described do not produce a product comparable with the product of my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. An article of manufacture of the class described, consisting of a strip of creped cellulose tissue crumpled transversely and compressed without twisting into an elongated substantially cylindrical resilient body, and glass fiber strands Wrapped around the compressed cellulose tissue and braided into open mesh closely embracing relation thereto, each strand being composed of a plurality of glass fibers, the strands being impregnated and coated with microcrystalline wax, said strands being embedded in the cellulose tissue to provide a smooth surface, said strands being relatively fine and of substantial tensile strength to facilitate wrapping thereof under substantial tension around the cellulose tissue and the embedding thereof in the cellulose tissue.

2. An article of manufacture of the class described, consisting of a strip of creped cellulose tissue crumpled transversely and compressed into an elongated substantially cylindrical resilient body, and glass fiber strands wrapped around the compressed cellulose tissue and braided into open mesh substantially imbedded relation thereto to provide a smooth surface, each strand being composed of a plurality of glass fibers, the strands being impregnated and coated with microcrystalline wax.

3. A packing cord, beading cord, edge roll or the like, comprising creped cellulose tissue crumpled edgewise and compressed into an elongated body of substantial resilience and uniform section and a wrapping of glass fiber strands of flattened cross section braided in open mesh thereon, each strand being composed of a plurality of glass fibers, the strands being impregnated with microcrystalline wax fiexibly binding the fiber glass filaments together and coating the strand, said strands being embedded in the cellulose tissue to provide a smooth surface, said strands being relatively fine and of substantial tensile strength to facilitate wrapping thereof under substantial tension around the cellulose tissue and the embedding thereof in the cellulose tissue.

4. A packing cord, beading cord, edge roll or the like comprising cellulose tissue crumpled and compressed into an elongated body of substantially uniform section and of substantial resilience and a braided wrapping therefor of strand each of glass fibers, said strands being impregnated with a microcrystalline wax and a mineral oil, said strands being embedded in the cellulose tissue to provide a mooth surface, said strands being relatively fine and of substantial tensile strength.

5. A packing cord, edge roll or the like comprising cellulose fiber material conformed into an elongated body of substantial resilience and a uniform section and a wrapping of glass fiber strands braided thereon, each strand being composed of a plurality of glass fibers, the strands being of flattened cross section and impregnated and coated with wax, said strands being disposed strands of flattened section and of glass fiberwrapped around the compressed tissue and impregnated and coated with wax and braided thereon in open mesh with the strands in closely embracing form retaining relation thereto, said wax facilitating conforming and retaining said strands to flattened section.

WAYNE S. COOK.

6 REFERENCES 'crrnn The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,821,582 Sackner Sept. 1, 1931 2,107,467 Buhler Feb. 8, 1938 2,272,588 Simison Feb. 10, 1942 2,344,181 Stone Mar. 14, 1944 2,393,530 Harris Jan. 22, 1946

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