US2203006A - Paper tube and method of making - Google Patents

Description

June 4, 1940. 0 L. A. YOUNG PAPER TUBE AND METHOD OF MAKING Filed July 23, 1958 2 Sheets-Sheet 1 INVENT OR. BY Leo/70m. Xaz/fiy 6 mzfigA i T RNEYS L. A. YOUNG PAPER TUBE AND METHOD OF MAKING June 4, 1940.

Filed July 23. 1938 2 Sheets-Sheet 2 ATTORNEYS A UNITED srA'ras- T PATEN OFFICE- mm runs am) METHOD or Mama Leonard A. Young, Detroit, Mich.

Application July 23, 19:8. Serial No. 220.2114

a Claims. (01. ss- -94) very economically and rapidly produced.

Second, to provide a paper tube which is very rigid in proportion to the amount of material or stock.

Third, to provide a paper tube which is well adapted for use as a garment hanger strut.

Fourth, to provide a method of making paper tubes and similar structures having the advantages above indicated.

Objects relating to details and economies of the invention will appear from the description to follow. The invention is defined and pointed out in the claims.

Preferred embodiments'of the invention are illustrated in the accompanying drawings, in which,

Fig. 1 is a fragmentary view illustrating various steps in the manufacture of a preferred embodiment of my invention.

Figs. 2, 3, 4, 5, 6 and 7 are enlarged sections on lines 22, 3-3, 4-4, 55, 6-4 and- '|-'I of Fig, 1 illustrating successive steps of my method,

Fig. 7 illustrating the completed tube.

Fig. 8 is a plan view of a section of the tubing of my method cut to form a garment hanger strut.

Fig. 915 a conventionalized side elevation of a machine or apparatus for practicing the steps of my method when a single strip of paper is employed as distinguished from the two strips shown in Fig. 1.

Figs. 10 to 14 inclusive are enlarged fragmentary sectional views on lines corresponding to line 10-10, 11-, lI-II, l3-l3, 14- respectively of Fig. 9 illustrating successive steps of the method. a

Fig. 15 is a side elevation of a garment hanger embodying the strut of this invention.

One of the main objects of my invention is to provide a paper strut for garment hangers such, for example, as illustrated in my Patent No. 2,011,265 issued August 13, 1935, or the Oldham Patent No. 2,025,887 issued to me as assignee under date of December 31, 1935, which may be very rapidly andeconomically produced and possesses great rigidity in proportion to the amount of stock contained therein.

' Paper tubes have heretofore been produced by spiral winding and by convolute winding and while the spiral wound tubes may be rapidly produced they are easily broken when subjected to lateral stresses. The convolute wound tubes are stronger but are quite expensive and production is quite expensive and requires a relatively large amount of time in production thereof; also they require a fairly good quality of paper, My improved struts and paper tubes may be very rapidly produced of a relatively low or poor giraige of paper and they are very strong and Referring to Figs, 1 to 7 inclusive, I illustrate a preferred form of my invention both as to product and method. I provide a plurality of strips of paper I and 2 which are arranged in a superimposed relation, the strip 1 being substantially wider than the strip 2. These strips of paper are coated on one side with an adhesive, preferably a quick drying adhesive. The paper and the adhesive are of such a character that when the adhesive is applied to the strips there is a substantial penetration of the adhesive into the paper aswell as the surface coating which is indicated by the stippling 3 in the drawings.

The adhesive is applied to the strip l before the strip 2 is superimposed thereon so that the strips are adhesively secured together in their superimposed relation. The superimposed strips are first folded longitudinally upon themselves, as shown in Fig. 3, and it will be noted that this brings the adhesive bearing surfaces of the strip 2 together. The wider strip is then folded down upon the previously folded double strip to the position shown in Fig. 4 with one edge of the strip I projecting to provide a joint flap 4. The multiply strip or body designated by the numeral 5 is then rolled longitudinally upon itself, preferably by a series of successive operations as shown in Figs. 5, 6 and 7 into the completed tube 5 with the joint flap I within the tube and overlapping the joint 8 resulting from the abutting edges of the multiply strip being brought together. These abutting edges are preferably adhesively secured together although for many uses of the tube that is not essential. It will of course be understood that the folding to provide a multiply strip or body 5 takes place before the adhesive is set and this is also true of the rolling or tube-forming strips. With the adhesive in its unset or plastic condition, the

plies readily slip upon one another as the multiply body or strip is rolled into the tube and when the cement or adhesive is set they retain their shape, the adhesive serving as a stiffening medium.

There are two advantages in employing a relatively poor or cheap grade of paper, one being that substantial amounts of the adhesive are absorbed thereby even though the manufacturing steps are being carried on at high speed and there is a sufiicient quantity of the adhesive present to serve as a stiffening medium so that the final product is capable of sustaining very substantial loads even when of comparatively light stock. It will be understood that in the accompanying drawings I have not attempted to show the parts in relative proportions as it is impractical to do that and still provide clearness.

The completed tube 6 may be cut into suitable lengths to provide a strut 9, as shown in Fig. 8. and I preferably notch the ends as at In to receive the arms of a hanger yoke such as indicated in the patents referred to.

In Fig. 9 I illustrate a method of forming a tube or strut from a single strip of paper II as distinguished from a plurality of strips, this strip ll being drawn from a roll l2 between a pair of rollersl3 and II, the roller It being a glue or adhesive applying roller receiving the glue or adhesive from the tank IS. A pair of folders are conventionally shown at l6 and II, the folder I6 bringing the strip to the position shown partially by dotted lines in Fig. 10 and the folder I! bringing it to the position shown by full lines in Fig. 10. The folders are not illustrated, as folders are known, particularly in the textile manufacturing art.

From the folder I! the partially folded strip designated by the numeral I8 is passed between a pair of rollers it! where it is brought into the completely folded strip 20. The strip then passes to a pair of coacting forming rollers 2| and 22, see Fig. 12, in which the multiply strip 20 is partially conformed or rolled longitudinally upon itself, this being preferably merely a matter of turning the edges 23. It is then passed to the 'coacting rollers 24, when it is brought to a channel section. It" is then passed to the rollers 26 and 21 which brings it to the form of the completed tube 28. Between the rollers 24, 25 and 26, 21 is a reducing gauge or .die 29 which brings the edges together somewhat for the final rolling operation and also smooths the exterior surface.

A glue applying device 30 is disposed in advance of the sizing gauge 29 to apply glue to the edges of the'multiply strip or at least one edge thereof so that when they are brought together to the position shown in Fig. 14 they are adhesively secured together. It will be understood that the meeting surfaces as indicated by the lines 3| and 32, Fig. 14, are coated with adhe- .sive.' No attempt is made in these figures to maintain the proportion.

After passing the rollers 21, the completedtube, indicated at 33, passes through a shear block 34 where it is severed by the cutter 35 coacting with the shear block into suitable lengths to form the struts 9.

Fig. 15 illustrates the manner of mounting the strut in the wire yoke 21 of the 'type described.

When a plurality of strips are used, I prefer- I ably for the sake of economy and also to permit substantial impregnation use a rather porous soft grade of paper which permits the adhesive to penetrate substantially even when the method is practiced at a high rate of speed. When multiply strips are used, the strip I may be, if desired, of a better grade of paper than the strip 2.

While my improved tubes and method were intended primarily by me for the manufacture of the economy of the material itself and the other 7 paper struts and hangers and the production thereof, my method may be used in the production of tubes.

Tubes embodying my invention have a wide application and larger tubes, for example mailing tubes, storage tubes and the like, cores for winding paper, and various other uses, may be economically produced. I have not attempted to illustrate the various adaptations as it is believed that this disclosure will enable those skilled in the art to which my invention relates to embody or adapt the same as may be desired.

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

1. A strut for garment hangers comprising a plurality of strips of paper disposed in superimof the body abutting and adhesively secured-together.

3. A paper tube comprising .a strip of paper folded longitudinally upon itself into a multiply strip, the paper being substantially impregnated and coated on the meeting faces of the plies with adhesive constituting a stiffening medium, the lmltiply strip being rolled longitudinally'into a 4. A paper strut for garment hangers comprising a strip of paper folded longitudinally-upon itself into a multiply strip and the multiply strip conformed into a strut. of tubular section, the paper being substantially impregnated and coated on the meeting faces of the piles 'withadhesive, the adhesive constituting" a stiffening medium.

5. The method of producing paper tubes com-- prising the steps of superimposingand adhesively securing together strips of paper',"one strip being wider than the other, folding the superimposed strips longitudinally into a multiplybody with the edge of the wider strip projecting beyond one edge of the multiply body, and conforming the multiply body by rolling longitudinally upon itself to bring the edges of the body into abutting relation with the said projecting edge overlapping the joint. g

6. The method of producing papertubes comprising the steps of superimposingand adhesively securing together strips ofpaper in superimposed position, folding the superimposed strips longitudinally into a multiply body with a ply of one strip projecting beyond one edge of the multiply body to provide a projecting joint flap, and conforming the multiply body by rolling longitudinally upon itself to bring the edges of the body into abutting relation with the said projecting flap overlapping.; the joint. p

7; The method of producing tubes comprising the steps of applying adhesive to one side of a strip of paper and substantially impregnating the strip with the adheslve,-folding the strip longitudinally upon itself into. a multiply strip with the adhesive bearing surfacesinteriorly of the to the setting of the adhesive.

9. ll paper strut for garment hangers comprising a strip of paper iolded longitudinally upon itseli intoa multiply strip with a D Proiecting at one edge of the multiply strip to provide a. joint flap, the multiply strip being conformed into a strut of tubular section with the edges thereof abutting and the flap overlapping the joint. 1 v

LEONARD A. YOUNG.

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