US1287945A - Tube. - Google Patents

Description

B. K. FORD.

was. APPLICATION FILED APR. III I918- 1,287,945. Patented Dec. 17, 1918.

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I M jrromvns BEN K. FORD, OF E351 ORANGE, NEW JERSEY.

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Specification of Letters Patent.

Patented net. 17, ieis.

Application filed April 11, 1918. Serial No. 227,843.

I '0 all whom it may concern: Be it known that 1, BEN of the United States, and residing at East Orange, in the county of Essex and State of New Jersey, have invented a new and Improved Tube, of which the following is a specification.

This invention relates to spirally wound tubes which may be formed on the general type of machines shown in my Patent No. 1,059,045, dated April ,15, 1913, and its object is to provide a tube formed by spirally windin a band of paper or other fibrous materia in which the adjacent edges of the band are cemented together.

This invention consists in a tube made up of one or more layers, each layer being formed from a continuous band of fibrous material having its adjacent edges cemented together. It also consists in such a layer formed from a continuous band having its adjacent edges beveled and overlapping and cemented together.

In theaccompanying drawing, Figure 1 is a plan and Fig. 2 an end elevation of this improved tube. Fig. 3 is a longitudinal section of the wall of the preferred form of this tube and Fig. 4 is a similar section of a modifintion thereof.

Similar reference characters refer to like parts throughout the several views.

Spirally wound tubes are usually made of two layers, the joints between. themalternating, and with a minimum amount of glue between the two layers. The joints are not filled with glue and there are, therefore, two continuous spiral lines of weakness in each such tube along which there is only a single thickness of material. 1

, In the present invention, edges of each of the bands of material form ing the tube are cemented together, andbecause of the fact that strawboard, which is the usual material for forming tubes, is usually strongest at the point where two thicknesses are cemented together, the present tube is provided with two continuous spiral lines of reinforcement. In addition'thereto, the tube itself is less impervious to moisture as the usual passages arefilled.

In Fig. 3, both the outer and inner bands.

\ 1 and 2 are shown formed with beveled or skived edges, which, together with the fiat K. Fonn, a citizen i will be distortedand of the just previously wound spiral which '9 and a true cylinder.

the adjacent contacting surfaces, in any desired manner before being wound into a tube. In Fig. 4, the band 3 that forms one layer has beveled edges'while the band i'has edges at right angles to its faces. In both cases, the layer 5 of cement unites the two bands while the inclined layers 6 and radial layers 7 of the cement unite theedges of the bands. I may be beveled as in Fig. 6 before winding, I prefer to form these bands as shown in Fig. 5. Here the edges 9 and 10 of the band 8 slope down in opposite directions, and in passingto the. winding machine, the glue is applied to the surface 11 alone. When the band is wound, the portion 12'of this band laid onto the edge 9 will bring a line of the layer of cement which has been applied to the surface 11, between the portion 12 and the edge 9. This causes the portion 12 to fill the space between the edge Because of the inherent resilience of this tube material, a sufficient pressure will be maintained between the portion 12 and the edge 9 to insure a thorough uniting of the materials. N 0 change need be made in the devices shown in my prior patent for applying the cement to the face 11 of the band.

The proportions of the materials and numbers of layers may e changed by those skilled in this art without departing from the spirit of this invention.

I claim 1- 1. In a tube, the combination of a continuous spirally wound band of fibrous material and cement filling the space between and uniting adja"ent edges of said band, said edges being beveled.

2. In a tube, the combination of a continuous spirally wound band of fibrous material and cement filling the space between and uniting adja ent edges of said hand,

both of the edges of said band normally sloping outwardly of the tube toward each other but one of said edges being distorted to lie upon the other beveled edge of the next spiral to fill thespace between said edge and a true cylinder.

BEN K. FORD.

are coated with cement While the bands 1, 2 and 3 Wlll cause this portion 12 to be bent up, as shown in dotted lines in Fig. 5, and

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