US2250776A - Upholstery cord - Google Patents

Description

y 1941. w. E. SACKNER UPI-IOLSTERY CORD 7 Filed July 24. 1939 IN VENTOR.

Wade 5. Jack/1 er I 'Lw-Q ATTORNEYS.

Patented July 29, 1941 UPHOLSTERI ooan Wade E. Sackner, Grand Rapids, -Mich., assignor to Grand Rapids Fibre Cord Company, Grand Rapids, Mich. L

Application July 24, 1939, Serial No. 286,186

. This invention relates to upholstery cord and. the method of making the same. In particular it relates to the type of cord shown in Sackner Patent No. 1,821,582, issued September 1, 1931, for Packing cord.

Such cords are used in upholstered furniture and as packing. They consist of a core or body of resilient material around which retaining threads are wound. The body portion is made of wadded and compressed cellulose tissue material which has the necessary resiliency for producing an inexpensive efiective cord. The objects of this invention are:

First, to produce such an improved cord.

Second, to produce such a cord which may be made inexpensively and which will retain its shape and on which the retaining threads are firmly held against unwrapping.

"Third, to provide a new and improved method of producing such cords.

Fourth, to provide such a methodwhich permits :faster production than heretofore.

'Fifth, to produce such a method which is inexpensive and simple.

Further objectsand advantages pertaining to details and economies of construction and operation will appear from the description to follow. The invention is defined in the claims. A preferred embodiment of my invention is shown in the draw n in which: Fig. 1 is an elevational view of the cord embodying this invention and made according to the method, the end of the cord being unraveled to show theconstruction.

Fig; 2 is a'detail sectional View taken on line 22 ofFig. 1.- r

Fig. 3 is a' view showing diagrammatically the improved method of producing the cord.

The cord 1 consists of a body portion 2 which is made of wadded cellulose tissue material. I prefer to employ a product sold commercially under the trade name Kimpak. This material consists of assembled sheets of thin creped cellulose tissue. This material is wadded and made into a substantially cylindrical core and is retained in position by spirally wound wrapping threads.

Although the wadded cellulose material to which I have referred specifically provides a superior cord, it would be apparent that the present invention may be applied to wadded cotton, cotton padding, cotton roving and tissue paper either crushed, pressed or twisted to form.

In making up my material, I employ apparatus such as is shown in Fig. 3. The core material 9 Claims. (01. 57450) is formed into a cylindrical core by means of a forming tube 5 and is fed along in the direction of the arrow in Fig. 3. Two revolving heads 6 and 1 are provided for applying the cords or threads 3 and 4 respectively. One head spins in one direction and the other in the opposite direction. They are disposed in'approximately the same plane and the cords 3 and 4 are wound on the core just prior to its passage to a finishing die 8. Each head applies a series of cords wound spirally on the core in a single direction. One head applies the cords directly on the core and the other head applies its cords in an opposite spiral on the core and over the other cords. The heads are shown illustratively and only one of several spools of cord on each head is shown.

In order to hold the cords in position and to assist them in retaining the core in its desired form, I apply an adhesive to the cords as they are applied to'the core. I prefer to use a starch suspension or solution and apply it to the'cords just prior to the wrapping of thecords' on'the' core so that the cords will still be tacky when they are applied to the core; 'I employ for this .purpose spreading rings 9 and H! which are supplied with adhesive which may be the starch solution indicated from a reservoir I! provided with'a conduit l2 branching into conduit l3 pro' viding adhesive to the ring 9, and conduit l4 supplying adhesive to the ring In. The cords 3 from the head 6 all contact'the ring 9 'on their way to the core and the cords 4 contact the ring In, picking up the necessary supply of adhesive.

Itwill be apparent that one series of cords is wound spirally on the core in one direction and thatthese cords adhere to the core because of the adhesive. The other set of cords applied over the first set adheres to the core and to the other cords because of the adhesive on the second set of cords. The finished product consists of the core with the two sets of wrapping threads therearound. The threads are adhesively secured to the body portion 2 and to one another at their points of crossing.

Instead of using thread or cord as shown in the specification, it will be apparent that other forms of strands could be employed. Narrow strips of paper applied in the same manner would retain the core firmly to form and would serve the same purpose as the cords 3 and 4.

By employing the adhesive to hold the cords or strands to the core and to one another, it is possible to cut cords for use without having the threads or strands unwrap. There is no danger of the core losing the form which it has which would be the case if the threads or strands were not retained in position by the adhesive. The use of my improved method speeds up production on the cord, making it practically double that which could be produced employing prior methods.

I have found that very satisfactory results may be obtained by applying the adhesive to only one set of helical threads, since the adhesive at the point of the crossing of the threads will secure the threads to which the adhesive has been applied and those to which it has not been applied together, particularly in small cords.

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

1. The method of forming packing cord comprising forming a core of compressed crepe sheets of cellulose wadding, applying starch to a plurality of threads to make them tacky and while said threads are still tacky wrapping them helically around said core in one direction and spaced from one another, applying starch to a plurality of other threads to make them tacky, and while said second mentioned threads are still tacky wrapping them helically around said core in a direction opposite to that of the wrapping of the first mentioned threads, and overlying said first mentioned threads and spaced from one another.

2. The method of forming packing cord comprising forming a core of resilient material, applying starch to a plurality of threads to make them tacky and while said threads are still tacky wrapping them helically around said core in one direction and spaced from one another, applying starch to a plurality of other threads to make them tacky and while said second mentioned threads are still tacky wrapping them helically around said core ina direction opposite to that of the wrapping of the first mentioned threads and overlying said first mentioned threads and spaced from one another.

3. The method of forming packing cord comprising forming a core of compressed crepe sheets of cellulose wadding, applying adhesive to a plurality of threads to make them tacky and while said threads are still tacky wrapping them helically around said core in one direction and spaced from one another, applying adhesive to a plurality of other threads to make them tacky and while said second mentioned threads are still tacky wrapping them helically around said core in a direction opposite to that of the wrapping of the first mentioned threads and overlying said first mentioned threads and spaced from one another.

4. The method of forming packing cord comprising forming a core of resilient material, applying adhesive to a plurality of threads to make them tacky and while said threads are still tacky wrapping them helically around said core in one direction and spaced from one another, applying adhesive to a plurality of other threads to make them tacky and while said second mentioned threads are still tacky wrapping them helically around said core in a direction opposite to that of the wrapping of the first mentioned threads and overlying said first mentioned threads and spaced from one another.

5. A packing cord comprising a core of compressed crepe sheets of cellulose wadding, a helically disposed wrapping of spaced threads adhesively secured to said core, and a second helically disposed wrapping of spaced threads extending transversely of and over said first mentioned threads and adhesively secured to said core and said first mentioned threads.

6. The method of forming packing cord comprising forming a core of resilient material, applying adhesive to a plurality of strands to make them tacky and while said strands are still tacky wrapping them helically around said core in one direction and spaced from one another, applying adhesive to a plurality of other strands to make them tacky and while said second mentioned strands are still tacky wrapping them helically around said core in a direction opposite to that of the wrapping of the first mentioned strands and overlying said first mentioned strands and spaced from one another.

7. The method of forming packing cord comprising forming a core of compressed crepe sheets of cellulose wadding, wrapping a plurality of threads helically around said core in one direction and spaced'from one another, applying adhesive to a plurality of other threads tomake them tacky and while said second mentioned threads are still tacky wrapping them helically around said core in a direction opposite to that of the wrapping of the first mentioned threads and overlying said first mentioned threads and spaced from one another.

8. The method of forming packing cord comprising forming a core of resilient material, wrapping a plurality of strands helically around said core in one direction and spaced from one another, applying adhesive to a plurality of other strands to make them tacky and while said second mentioned strands are still tacky wrapping them helically around said core in a direction opposite to that of the wrapping of the first mentioned strands and overlying said first mentioned strands and spaced from one another. I

9. A packing cord comprising a core of compressed crepe sheets of cellulose wadding, a helically disposed wrapping of spaced threads on said core, and a second helically disposed wrapping 'of spaced threads extending transversely of and over said first mentioned threads and adhesively secured to said core and said first mentioned threads. 7

WADE E. SACKNER.

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