US1507372A - Multiply paper - Google Patents

Description

Sept. 2 1924.

J.H.GREENSTREET MULTIPLY PAPER Filed Dec. 20. 1919 INVENTOR. Jason M. eii/vsreeer ZIvvrS' ATTORNEYS.

Patented Sept. 2, 1924. i V UNITED STATES PATENT OFFICE.

JASON H. GREENSTREET, OF INDIANAPOLIS, INDIANA; CHARLES J. GREENSTREET ADMINISTRATOR OF SAID JASON H. GBEENSTREET, DECEASED.

HULTIPLY PAPER.

Application filed December 20, 1919. Serial No. 846,231.

To all whom it may concern:

' Be it known that I, Jason H. GREEN- s'rana'rfa citizen of the United States, and a. -resident of Indianapolis, county of Marion,

and State of Indiana, have invented a certain new and useful Multiply Paper; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like numerals refer to like parts. a The object of this invention is to produce a relatively strong and cheap multiply paper board. Broadly stated, this mu tiply paper board comprises a plurality of layers, some of which are preliminarily provided with portions displaced from the normal plane of the paper, combined into a single sheet by interposed adhesive material and the whole sheet compressed to firmly crumple the displaced portions before the adhesive mater1al dries. More specifically the paper board consists of a plurality of sheets of paper superimposed upon each other, the outside sheets preferably being plain and the intermediate sheet or sheets bein folded in relatively narrow parallel fol or corru tions so that the folds or corrugations Wlll preferably overlap each other when compressed or crum led and thus cause a single sheet-to havein itself a plurality of layers or thicknesses of paper. Where a plurality of such folded, corrugated or crumpled sheets of paper are em loyed, they are arranged so that their folds or corrugations Wlll preferably lie crosswise of each other. The sheets constituting the board are coated with adhesive material before they are compressed and dried to form the finished product.

Along with. the foregoing is a. further feature of the invention which consists in utilizing the adhesive material between various layers or sheets as a layer of material which, when applied thickly, is a rigid stiff layer giving great rigidity, stiffness and strength to the ultimate product. In this connection the folded or corrugated intermediate or filler sheets of aper are preferabl saturated with or fiawn throu h a of adhesive material, such as sihcate of soda, which causes the silicate of soda to fill the spaces, between the different sheets, and in the depressions of the different folds or crumples of the material and thus be thick enough to form very of silicate of soda in the finished product. This enables a very stron stiff paper board to be made with relative y less paper stock or material because it, orthe folds thereof, is supplemented by the adhesive material or silicate of soda, and a sheet of paper folded as hereinafter set forth will, with the adhesive material five layers or the equivalent of five layers of papler adhesively and rigidly secured to get er.

The crumpling or folding of the filler layers and the ultimate association of the sheets, result in a compression or crumpling of the folds or corrugations, and, therefore, in a distortion of the fibres of the paper more or less irregularly in such manner as to increase the strength of the ultimate product, not only against bending and stresses, but also against perforations. This lrreglular arrangement 0 crus ed paper cooperates with the adhesive material w finished product.

stiff rigid layers A further ob'ect of my invention is to provide a boar that is stronger than the stock corrugated board by filling the valleys with adhesive material.

Another object of my invention is to provide a strong multiply wrapping and packing pa er comprising a sheet of aper made of a p urality of successive fol or corrugations and successively overlappin each other at their edges to form preferab y five thicknesses at the oint of overlapping and three thicknesses tween the overlapping portions of the folds, and adhesive material inds and secures to ether the five thicknesses at the overlapping of the folds, leaving the three intermediate thicknesses without adhesive material to render the roduct flexible. The uniting of the over appin portions of the folds serves to add strcngt to the pa r.

The fu nature of the invention will be understood from the accompanyin draw ings and the following description and claims: p I

In the drawings, Fig. 1 is a plan view of said new multiply paper board cut away to illustrate the make-up of the product, the folds or crumples being indicated by dotted lines with the layers of adhesive material omitted for clearness. Fig. 2 is a section on or silicate of soda, furnish the fibres of the i 2 on a much lar er scale. Fig. 4 is a section through a modified form of intermediate or filler sheet and adjacent external sheet, being a sheet of well-known corrugated board arranged crosswise of each other. Fig. 5 is a section through the multiply board made of two sheets of said corrugated paper board cross wise of each other. Fig. 6 is a section through a finished paper or board.

formed; of a corrugated board having a single intermediate corrugated sheet between two outside sheets and the whole compressed. Fig. 7 is a section through a modified form of multiply wrapping paper.

In the drawings there is shown in Fig. 3 a multiply paper board having a lower sheet 10 of plain paper, an upper sheet 11 of plain paper, and two intermediate or filler sheets or layers 12 and 13, respectively, which are folded or corrugated sheets and also thicknesses 14 of adhesive material. which has become dry and hard. The elements constituting the board just described are compressed tightly together in their manufacture so as to produce, when finished, a very strong, hard, stiff board. The folds of the intermediate or filler sheets 12 and 13 are relatively narrow folds overlapping each other, and the two sheets 12 and 13 are placed upon each other so that their folds extend preferably transversely of or at right angles to each other.

The nature of the invention will be more fully understood from a brief description of the preferred method of making the same. The sheets 12 and 13 are folded, as shown, with their folds partially overlapping each other so that at one point of each fold there are three thicknesses or layers of paper and where they overlap each other, there are five thicknesses or layers of paper. Thus, re-' ferring to Fig. 3, the upper layer 121 of a fold is, say 1 inches wide, and the lower layer 122 of such fold is of an inch wide,

and the adjacent folds are made in similar dimensions and, therefore, two folds would overlap of an inch. Hence, at the overlapping portions of said folds, there are five thicknesses of said paper and in the remainder of said folds there are three thicknesses of paper. The intermediate filler sheet 13 is similarly folded. Then said sheets 12 and 13 are drawn through silicate of soda or other adhesive in liquid form so that the adhesive material adheres to all surfaces of said sheetsand the folds thereof. As shown in Fig. 3, the two side surfaces of the sheet 12, as a whole, have successive depressions caused by the overlapping edges of the folds and these depressions become filled with the adheive material 14 so that the adhesive material makes a practically smooth surface on both sides of the sheet 12, entirely enveloping said sheet and filling the spaces between the folds. It is obvious that if the folds of the sheet 12 are not compressed flat, as shown in Figs. 2 and 3, but are somewhat open, they will receive and retain a much greater thickness or layerof adhesive material or silicate of soda, as shown in Fig. 7.

The sheets 12 and 13 thus folded and treated with adhesive material. are placed between the two outer layers 10 and 11, with their folds lying cross wise or at right angles to each other. Then all of the sheets and layers are compressed and the adhesive material allowed to dry. When it is dried. it is obvious that a very stiff and strong multiply board is formed, as it has a very large number of thicknesses of paper and also a considerable number and relatively thick layers of adhesive material. 'The invention, however, is not limited to any particular thickness of the layers of adhesive material, that being left to the choice of the manufacturer. It can be applied to the sheets of paper or layers in a thin form and with a brush, if desired, or drawn through a tank containing liquid adhesive. as above explained, and the folds of the intermediate sheets may be relatively close together when the adhesive is applied, or be somewhat open, and thus render the layers of adhesive material relatively thicker, so that when dried, said layers will be stiff and hard.

In the preferred manner of manufacture. plain flat paper is fed into a machine to form the. intermediate layers 12 and 13. Said layers 12 and 13 are laid together crosswise and passed through a bath of an adhesive, such as silicate of soda. As they emerge therefrom, they are preferably fed between the top and bottom sheets 10 and 11 and the whole compressed to the thickness desired and dried preferably by passing between heated rollers or any well known means of compressing and drying.

In the modified form in Figs. 4 and 5. there is shown a multiply paper or board formed of two ordinary corrugated paper boards passed through or saturated or coated with silicate of soda or other adhesive material and compressed and dried, as above explained. The two sheets of corrugated board are arranged so that the corrugations extend transversely of each other and when they are compressed, the corrugations are crushed and crumpled down so as to fold and overlap in substantially the same way as in the form shown in Figs. 2-and 3. but without any regularity, as is obvious. This will give to some portions of the intermediate sheet of paper three or more thicknesses. but the fibres will extend in various directions and the adhesive material will be under and over each fold and portion thereof. as in the other form, and when dried, will form dry, rigid layers of adhesive material, which will not only cause the sheets of paper to adhere to each other, but also give stiffness and strength to the the ultimate product.

It is observed that in building up this board, the adjacent plys are so arranged that the normal ain of one layer of paper is transverse o the grain of the other layer of paper. Also the various folds and corrugations are vertically com ressed or crumpled laterally, and leave epressions for receiving additional thicknesses of adhesive material. It is also noted by the arrangement of the folds of the intermediate sheets of paper, whereby a portion thereof has a thickness of more layers than other portions thereof with intermediate depressions to some extent between them, filled with adhesive material, greater strength, durability and effectiveness of paper board may be obtained without the necessity of having the same thickness in continuous lengths of flat paper for the length of the board. Thus a considerable saving of paper is effected and at the same time a relatively stronger paper board results.

By multiply paper or paper board here- 11'! is meant paper or paper boardincluding in its make-up oneor more sheets of paper folded on itself or corrugated and subsequently compressed and crushed or crumpled. .The invention is not necessarily limited to paper or paper board wherein anintermediate sheet 18 provided with folds or corrugations exactly as herein shown, as

said intermediate sheet or sheets may be otherwise formed in the manufacture of the board so that when the same is compressed, portions thereof will fold, crumple down, or overlap other ortions thereof and give to portions of sai intermediate sheet or sheets a plurality of thicknesses, substantially as above set forth. Nor is the invention necessarily limited to the board substantially as herein set forth which has been com ressed.

Fig. 7 illustrates a form of wrapping paper consisting of a. single sheet of paper with a succession of folds or corrugations with their succesive edges overlapping each other so as to make five thicknesses at the overlapping laces and at such places the layers or thic esses are secured together by adhesive material.

This materially strengthens the paper and leaves the portions intermediate the overlapping portions free from adhesive material so as to be flexible.

By folds herein is meant overlapping folds substantially as shown inFigs. 2, 3, 5, 6 and 7 thereof.

The invelntign claimed is: 1

LA mu tip paper comprisi a urality of layers zecured'together bfii iidhe ive material, one or more intermediate layers being provided with crushed portions displaced from the normal plane of the paper and overlapping each other and secured together by adhesive material, substantially as set forth.

2. A multiply paper, comprising a plurality of layers having the normal grain of one layer arranged transversely to the normal grain of an adjacent layer, and some of the layers provided with crushed portions displaced from the normal plane of the paper or corrugated, and overlapping each other and secured together, the several layers combined into a single sheet by interposed adhesive material.

3. A multiply paper, comprising a plurality of layers, at least one layerbeing folded into a multiplicity of overlapping crushed folds and the spaces therein filled and the surfaces covered with adhesive material for uniting the layers and cementifying the multiply paper.

4. A multiply paper, comprising a plurality of layers, at least one layer being preliminarily folded into a multiplicity of overlapping folds and associated with an adhesive, the several layers being formed into a single sheet by adhesive and pressure sufiicient to firmly compress the overlapping folds.

5. A multiply paper or paper board including a sheet of paper with successive crushed folds leaving depressions in the surface of said intermediate sheet, a plain flat sheet secured to the sides of said folded corrugated sheet, and adhesive material fillin the spaces between the external sheets an adjacent surfaces of the folds of the intermediate sheet.

6. A multiply paper or paper board including one or more sheets of paper, each of which sheets is formed with a'succession of crushed folds for giving portions of said intermediate sheet a plurality ofthicknesses of paper, adhesive material coating the surno faces of said sheet and the folds thereof, and a plain flat sheet of paper.

7 A multip'ly paper or paper board comprising external sheets of paper, one or more intermediate sheets of paper between said external sheets of paper, said intermediate sheet or sheets being formed with a succession of crushed folds for giving rtions of said intermediate sheet a plum ity mo of thicknesses of paper, and a layer of adhesive material between the external sheets of paper and the said folded intermediate sheet or sheets of paper, substantially as set forth.

8. A multiply paper or paper board comprising external sheets of paper, a plurality sheets being arranged so that the folds of one of said sheets will extend transversely of the folds of the adjacent intermediate sheet or sheets, and a layer of adhesive material between the external sheets and. the various sheets of paper constituting the multiply paper board the whole being secured tightly together, substantially as set forth.

.9. A multiply paper or paper board comprising externa sheets of paper, one or more intermediate sheets of paper between said external sheets of pa er, said intermediate sheet or sheets being ormed with a succession of folds for giving portions of said sheet difierent thicknesses of paper at different portions thereof, and a layer of adhesive material between the external sheets of paper and the said folded intermediate shes};1 or sheets of paper, substantially as set fort prising externa sheets 0 paper, one or more Intermediate sheets of paper between said external sheets of paper said intermediate sheet or sheets being formed with a succession of crushed folds, one side of each of said folds bein less than twice as wide as the other side 0% said fold, and said folds overlapping so that portions of. each of said intermediate sheet or sheets will provide three thicknesses of paper and other portions five thicknesses of paper, and a layer of adhesive material between the external sheets of paper and the said folded intermediate sheet or sheets of paper the whole being secured tightly together, substantially as set forth.

11. A multiply paper comprising a pluralit of interior layers of paper having over apped pgrtions producing ridges of a greater num r of layers than portions between ridges, the rldges of one internal la er lying transversely of the ridges of an a acent internal layer, facing sheets, adhesive between the internal layers and between the internal layers and the facing sheets, the whole havin been firmly compressed to cause substantial adherence between the major portions of adjacent surfaces both of the internal layers and the internal layers and facing sheets.

12. A multi 1y paper com rising two filler la are pre iminarily folds into slight- 1y over applng substantially parallel pleats and two adjacent layers being placed with the pleats of one lying transversely of the pleats of the other, two facin heets, and g 4 adhesive between the severa 10. A multipl paper or aper board comsheets, the whole being firmly compacted by pressure suflicient to intimately associate the sheets and adhesive substantially throughout the entire area of the product.

13. A multipl pa er including one sheet of paper forme wit a succession of folds or crumpled corrugations with their adjacent edges overlagping each other for mcreasing the num r of thicknesses of the sheet, and adhesive material securing and uniting togethersaid overla pin portions, the remaining portions of t e s eet being free from adhesive material.

In witness whereof, I have hereunto affixed my signature.

JASON H. GREENSTREET.

Certificete of Correction.

It is hereby certified that the grantee in Letters Patent No. 1,507,372, granted Se tember 2, 1924, upon the application of Jason H. Greenstreet, of Indianapolis, Ingiana, for an improvement in Multiply Paper, was erroneously described and specified Charles J. Greenstreet, administrator of the estate of said Jason H. (:rreenstreet, deceased, whereas said grantee should have been described and specified as Charles J. Greemtreet, executor of the estate of said Jason [1. Greenstreet, deceased, as shown by the records of assignments in this ofiioe; and that the said Letters Patentshouid be read with this correction therein that the same ma. conform to the record of the case in the Patent Office.

bigned and sealed this 11th dey of November, A. D. 1924.

[sun] KARL FENNING,

Acting Commissioner of Patents.

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