US1388467A

US1388467A - Flexible paper tubing

Info

Publication number: US1388467A
Application number: US378245A
Authority: US
Inventors: Keller Emil
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-05-22
Filing date: 1920-05-01
Publication date: 1921-08-23
Anticipated expiration: 1938-08-23

Description

E. KELLER. FLEXIBLE PAPER TUBING. APPLICATION FILED MAY I, I920- Patented Aug. 23, 1921.

UNITED STATES PATENT QFFICE.

EMIL KELLER, 0]! VIENNA, AUSTRIA.

FLEXIBLE rerun TUBING.

Speciiication of Letters Patent. Patented Aug 23, 1921.

Original application filed May 22, 1919, Serial No. 299,056. Divided and this application filed May 1, 19%). Serial No. 378,245.

To all whom it may concern:

- Be it known that I, EMIL KELI IIB, a citizen of the Republic of Austria, residing at Vienna, Austria, have invented certain new and useful Improvements in Flexible Paper Tubing, of which the following is a specifi-- caoutchouc tubes by tubes or hose of paper having side walls provided with grooves or corrugations running transversely to the tube axis. The grooves or corrugations of this known type of tubes are however comparatively flat and distant from each other,

so that a longitudinal section through the tube will offer the general aspectof a more or less steep sine curve. The flexibility and elasticity of the tube acquired by thus form-' ing it will however be only very small. Besides grooves or corrugations of the form above described will not impart a sufficient force of resistance against strains directed" transversely to the tube axis. A high degree of capacity of resistance against lateral strains and a high flexibility are however of primary importance for the practicability of a paper tube, which, unlike the caoutchouc tube, will not return to its original form, squashed or when depressed at some place or flattened at a sudden bend.

The object of this invention is such an improvement of the aforementioned known type of paper tubes that they will form a perfect substitute for the india rubber or caoutchouc tubes. The qualities required to attain this object are imparted to the paper tube. by arranging transversal grooves or corrugations in such a way that they will closely abut, the sides of said grooves being substantially perpendicular tothe tube axis and acting as bracing pieces. By these means the tube acquires an increased elasticity and flexibility as well as the required strength against lateral forces, that have the tendency to depress or flatten its side walls, A further increase of elasticity and flexibility will be obtained according to this invention, by glu ing or cementing the paper layers forming the constituent parts of the tubemerely at certain places properly distributed along the circumference of the tube,

The invention is illustrated in the accompanying drawing inwhich- Figure 1 represents a tube or hose manufactured accordin to this invention, partly in a side view and partly in a longitudinal section.- 1

Figs. 2 and 3 show the paper layers, when unrolled and spread in a plane.

Fig. 4: represents a cross section through the tube.

The improved tube .or hose consists of paper layers 1, the number of which is suitably chosen according to. the intended purpose. The layers are tightly wound upon each other on a cylindrical mandrel and the adjoiningrlayers are glued or connected together. he tube thus formed is then provlded with grooves or corrugations running along a spiral -or helix, the side walls of said corrugations being substantially perpendicular' to the tube axis. As shown in Fig. 1 the grooves or corrugations closel abut, so that their crests and hollows are oi semi-circular ,shape, the side parts of the grooves connecting said crests and hollows being substantially perpendicular to the axis of the tube. The said side parts, forming, as it were, a

the peripheral walls of the tube or hose, are. united to form a' single continuous surface by means of the semi-circular crests and hol 'series of closely abutting rings constituting lows, thus imparting to the tube a high rewhen the load becomes comparatively hig Such yielding and flattening of the grooves or corrugations-is, however, rendered almost impossible, if they are arranged to closely abut in such a way that their side parts will axis.

Moreover, by means of the closely abutting grooves or corrugations an extraordinary increase of the flexibilit and elasticity of the tube is produced. he side parts of the grooves 3, which are of a depth not less than the distance between a crest and an ad'acent hollow, being closely abutting and susten- :be substantially perpendicular to the tube tially perpendicular to the tube axis, a sort sudden turns or of ample lengthening or extension of the tube. Even in the case of very sudden bends the tube retains its perfect circ'ular' cross section; no depressing or breaking on the inner and no flattening on the 2o, 1 A further increase of the flexibility and vention by gluing outer side will occur, as is the case with ordinary' papertubes having fiat ahd not closel abutting corrugations, which frequent y are completely squeezed together at sudden bends of the tube.

A special advanta e of the improved paper tubeconsists in the fact, that the close vicinity of the grooves or corrugations causes e formation of grooves with very small r ius of curvature, whichfacilitate the return into the original shapefa'fter a deformation due to some violent influence elasticity is obtained according to this inor cementing the paper layers 1 pnly at-certain places-and by distributing these places uniforml along the circumference of the tube. A shown in H Figs. 2 and 3, two superposed-paper layers are preferably glued or cemented merely agongax al or elical strips or at certain p aces of such a line or curve, and the places glued of the superposed layers are staggered, in order to obtain'a uniform distribution along the'wholecircumferenc'e (see Fig. 4).

The inner and outer mar ns. of each paper layer are of course lfiiewise glued or cemented to the adjoining layer.

Gluing or cementing only at intervals allows of a ver small displacement of the .ing or stret'chin the tube.

layers relative y to each other, which will occur, when a pull slightly flattenin the grooves o'r'corrugations 3 is caused by end- This lateral play ers, however small, adds exibility and elasticity of of the paper a reatl to the t e tu e. r v

To increase the impermeability against liquids or gases and the capacity-to resist chemical influences, the paper used -for.the

' oil varnish orthe like.

I against mechanicalin manufacture of the tube may be' impreg-Y nated with a. suitable substance as paraflin, Instead of using a paper .slaed 1n the common fashion it is also possible to use a archment paper or some aper prepared wlth a sizing rendered insolu le by a treatment with chromic salts. To increase the 'ca acity of resistance ii uences the tube -may be provided with an inlay of wire gauze or other fabric, as is well known with caout per or muslinpaper or may be lined or coated on its inner or outer side or on both sides with such -fabrics.

Moreover the tube may be given a linin consisting of a very thin seamless meta of corrugations and havin tube,. as shown at 4 in Fig. 4, which is grooved and corrugated together with the paper tube.

aper tubes manufactured according to this invention will have the advantage of being more proof against some chemical iiifluences, and less inclined to become britt e. V

If used to contain fluids under pressure, tubes of the above desc'ri tion will be subject to an extensionwhic can however be minimized by loosely slipping over the tube an envelop or coatin consisting of a stron but flexible fabric, fastened at the ends 0 the tube.

' What I claim is:

1. As an article of manufacture, a flexible tubing consisting of a paper tube, provided with corrugations having intermediate side jparts between their. hollows and crests,

which are closely abutting along their adjacent faces.

2. As an article of manufacture, a flexible 3. As an article of manufacture, a flexible .tubing consisting of a paper tube provided with corrugations having intermediate side "parts between their hollows and crests and of a depth not less than the distance between the hollow and the adjacent crest of a corrugation,said side parts being closely abutting alon their adjacent faces, the said corrugations t us formlng a reserve of material to be paid-out at bends of the tubin 4, As an article of manufacture, a flexib tubing consisting of a paper tube formed y aseries of Sn erposed layers of paper glued together an provided with corrugations having intermediate. side parts between their hollows and crests, closely abutting along their adjacent faces. 5. As. an article of manufacture, a flexible tubing consisting of a paper tube, formed b a series of superposed layers of paper 'gl ued together and provided with corrugations of a de th not less than the distance between the ollow;and the adjacent crest side arts between their hol ows and crests,

close abutting along their adjacent. faces, to forma reserve of material to be paid out at bends of the tubing. j

6. As an article of manufacture,'a flexible y a series of superposed layers of paper glued together at places distributed alo the circumference of the tube and rovid with corrugations having interme late side I tubing consisting of a paper tube formed chouc tubes or it may be made of linen pab 7. As an article of manufacture, a flexible tubing consisting of a paper tube provided with corrugations running alon a helical line and having intermediate si e parts between their hollows and' crests which are closely abutting, the itch of said helix being ofsuch wldth t at close abutment is obtained along the outer and the inner faces of the corrugations of the tube.

8. As an article of manufacture, a flexible tubing, consisting of a paper tube formed by a series of superposed layers of paper glued together at places distributed along the circumference of the tube, the said tube being provided with corrugations running along a helicalline and having intermediate side parts between their hollows and crests, which are closely abuttin the pitch of said helix -bein of such widt that close abutment is o tained along the outer and the inner faces of the corrugationsof the tube. 9. As an article of manufacture, a flexible tubing consisting of a paper tube-formed by a, series of superposed layers of paper 5 glued together at places distributed along a helical line along the circumference .of the tube the said tube being provided with corrugations running along a helical line and having intermediate side parts between their hollows and crests, which are closely abutting along the outer and inner faces of the corrugations. a I i 10. As alggticle of manufacture, a flexible tubing co isting of a paper tube formed by a serles of superposed layers of paper glued together at places distributed along the circumference of the tube, the gluing places in the superposed layers being staggered, the said tube being provided with corrugations runnin along a helical line and having interme late side arts between their hollows and crests whic are closely abutting along the outer and inner faces of 1 the corrugations.

In testimony whereof I have afiixed my signature.

EMIL KELLER.