US1458918A - Composite fabric - Google Patents

Description

June 12; 1923.

. 1,458,918 G. O. COOMBS COMPOSITE FABRIC Filed May 5, 1921 2 Sheets-Sheet 1 June 12, 1923. 1,458,918

G. O. COQMBS COMPOSITE FABRIC- Filed May 5, i921. Sheets -Sheet 2 ,wswm ll Patented June 12, 1923.

UNITED s'r enoaen o'rrs coomns, or rnovrnnrrcn, BHODE IsLAnn.

' COMPOSITE FABRIC.

Applicatlonflled Kay 5, 1921. Serial No. 466,887.

' To all'whom it may concern:

, relates to a composite fabric stifl'ened and reinforced by filaments and adapted for making boxes and containers or other packaging purposes.

One of the purposesof the invention is to provide a composite fabrichaving a layer reinforced by strengthening fibres or filaments and having a relatively thick stiffening layer which may be of cheap material with a stiffness suflicient to enable a box or container formed thereof to stand up with out 'colla sing.

The c aracter of the invention will be best understood by reference to the follow ing description of one good form thereof shown in the accompanying drawings,

V wherein Fig. 1 is a perspective view of one form 'of composite fabr1c embodying the invention, having a portion pulled outward and backward to disclose the internal construction of the fabric;

Fig. 2 is a perspective view of another form of the composite fabric having a por-' inforcing filaments segregated to facilitate understanding of the relation thereof;

is a'perspective view'of a box which Fig? -may d formed of the fabric shown in Fig.

Fig. 7 is a lan of a blank died out into proper form or the production of part of the box shown in Fig; 6.

Refer g'more particularly to Fi s.- 1, 3 and 5 o the drawing, the composite abric shown therein as one good form of the invention, comprises a layer 1 which may be of paper or other'appropriate fabric. his layer may be desirably of a strong, thin character, such, forexample, as afforded by maniIla paper. This layer may be pliant 'or so easily flexible that it will not have stifi ness suflicient to render the same self-sustaining.

A suitable material or layer 3 may be provided to give the composite fabric substantial stiffness, in order that it may serve the uses referred to. .This material preferably is made of cheap substance or substances which may not have substantial.

stren' h to resist tearing strains, but yet will ave substantial stiffness.

One good-- form of material for this purpose may be' made of waste materials, such, for example, as the product commercially known as c ip board. The thickness of this stiffening material or board preferably is substantially greater than the thickness of the layer 1.

The layers described ma be provided with suitable reinforcing fi aments of various kinds, but preferably these filaments are unspun fibres preferably of long staple, such, for example, as sisal, flax, ramie, hemp, and otl ier forms offiiibres. H d

he unspun res are usua prepare 1n rovings or sliver form. That is, the fibres are reclaimed from the woody or other material which naturally adheres to them, and are then formed into long, untwisted repin s, rovings or slivers.

hese rovings may .,be flattened or made into sheet-like form, with the fibres in substantial parallel relation. The sheet may be attenuated to the thickness desired. The fibresmay be brought into substantial parallel relation in sheet-like form by any suitable known maohine for the purpose.

For some purposes it'is desirable that the composite fabric shall be provided with unspun fibres extending longitudinally and transversely of the fabric in crossing relation. In the present instance, in the form of fabric shown in Fig. 5, a sheet 5 of unspun fibres is shown extending longitudinally -of the fabric, and a sheet 7 of unspun fibres is shown extending transversely of the fabric.

, The present invention contem lat'es that these sheets of unspun fibres she. be adhesively secured to the layers 1 and 3. Any suitable adhesive ma be employed, but

preferably a waterproofadhesive is used, a

to the adhesive layers, and all of thelayers are pressed together so as to form a composite fabric, as shown'in Figs. 1 and 3.

For certain purposes it may suflice to have reinforcing filaments or fibres extending in one direction only. In Figs. 2 and 4 is shown such a fabric comprising a layer 13 which may be similar to the layer I referred to, a stiffening layer 15 which may be similar to the stifiening layer 3 referred to, unspun fibres 17 extending in substantial parallel direction, and an adhesive layer or coating 19 between the layers 13 and 15, and in which the unspun fibres are embedded.

In pressing the layers together, they may be passed through suitable rollers, one having a metallic surface, and the other having a rubber surface, the construction being such that when the fabric is passed between the rollers, the fibres may form slight ridges 21 in the paper or fabric layer adjacent the rubber surface roll.

The thinner outer layer 1 provides a strong outer surface, the relatively thick layer 3 provides stiffness, the filaments or unspun fibres provide strength, and the waterproof layer or layers prevent moisture from working through the fabric.

The fabric of the present invention is adapted for many different uses, such, for example, as in the production of boxes, wrappers and other containers. I

As illustrating the use of the fabric in making boxes, reference may be had to Figs. 6 and 7 of the drawing. A blank 23 may be died out from the reinforced stiffened fabric, and have a back 25, sides 27 and ends 29 provided with wings 31 suitabl formed to interlock with slits 33 in the si cs 27.

Preferably the stiffening layer'is at the inner face of the box, and the strong and more durable layer 1 is at the outer face of the box. To enable bending-of the sides,

I ends and wings, the blank may be scored along lines 35 at the juncture of the body with the sides, along lines 37 at the juncture of the body with the ends, and along lines 39 at the juncture of the wings with the ends. These scoring lines are on the stiffening layer, and weaken the same somewhat, so that the sides and ends may be folded into planes perpendicular with the plane of the body 25 and the wings 31 may ,be folded into planes perpendicular to the ends 29, and be interlo ed with the slits 23,

thereby forming the body 41 of the box.

shown in Fig. 6. The cover may be siniilarl formed.

en the blank is made 'froma composite the same and prevent rupture of the composite fabric along said lines.

Thus, -a box or container is provided which is self-sustaining and of sufficient stiffness 'to hold itsshape due to the stiffening layer 3. The outer surface is sufliciently strong to resist wear due to the character of the layer 1. The folds of the box are reinforced by the filaments or unspun fibres extending transversely thereof, and the ingress of moisture through the box is prevented by the waterproof adhesive. The wings 31 are desirably reinforced by the filaments or fibres, and can be relied upon to securely interlock with the slits 33 without rupture of the wings and consequent release of the con nection of the sides and ends. For some purposes the box may be formed of a fabric having reinforcing filaments or fibres running in one direction only, but in boxes or 1. As an article of manufacture, a composite reinforced stiffened fabric for making'boxes and other purposes, comprising a paper layer, a stiffening board substantially thicker than the paper layer, a sheet of reinforcing or strengthening unspun fibres extending in general parallel relation, and an adhesive layersecuring the paper layer, backingand the series of unspun fibres together.

2. As an article of manufacture, a cornposite reinforced stiffened fabric for making boxes and other urposes, comprising a fabric layer, a stiffening board substantially thicker than the paper layer, a series of reinforcing strengthenin unspun fibres ex-. tending in general pa lel relation, and a waterproof adhesive layer securing the paper layer, stiffening board and unspun fibres together.

3. As an article of manufacture, a composite reinforced stiffened fabric for making boxes and other purposes, comprising-a paper layer, a stiffening board substantia ly thicker than the paper layer, sheets of reinforcing strengthening unspun fibres adhesively secured to the paper la er and' stiffening board, the fibres of said sheets extending in transverse relation to reinforce the fabric-in transverse directions.

4. As an article of manufacture, a composite reinforced stiffened fabric for making boxes and other purposes, comprising a strong, thin fabric, a stiffening board substantially thicker than said fabric, and a series of reinforcing strenthening unspun fibres extending in general parallel relation, and adhesively secured to the fabric and stiffening board.

5. As an article of manufacture, a composite reinforced stiffened fabric for making boxes and other purposes, comprising a a series of reinforcing or strengthening in dependent filaments extending in general parallel relation and adhesively secured to {)he paper layer and the thicker stiffening oard.

6. As an article of manufacture a cornposite reinforced stiffened fabric for ma-krelation between the paper layer and the stiffening board and embedded in the adhesive layer.

In testimony whereof, I have signed my name. to this s ecification.

G ORGE OTIS COOMBS.,

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