US1382740A - Conduit - Google Patents

Description

R. P. PERRY.

CONDUIT.

APPLICATION FILED Aus.26, 1913.

1,382,740. Patentgd June 28,1921.

INVENTOR ATTORNEY UNITED STATES PATENT OFFICE.

RAY P. PERRY, OF "UPPER MONTGEAIR, NEW JERSEY, ASSIGNOR TO THE BARRETT COMPANY, A CORPORATION OF NEW JERSEY.

CONDUIT.

To all whom it may concern Be it known that I, RAY P. PERRY, a citizen of the United States, residing at Upper Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Conduits, of which the following is a specification.

This invention relates to the process. of producing conduits or hollow articles and the )roducts thereby obtained.

T e object of the invention is to produce a conduit containing mixed fibrous and was terproofing materials which is substantially homogeneous and impervious to water, which shall possess good wearing qualities and a considerabledegree of strength and rigidity, and which shall be capable of being cut into various lengths to be used for different purposes.

In practising comminuted waterproofing material such as pitch, asphalt, resin, etc., may be mixed with a watery pulp of'fibrous material and this mixture formed into a sheet upon an ordinary felt or paper-making machine. After the sheet has been. formed and partially or entirely freed from water, it may be wound upon a mandrel, for example, to form a hollow cylinder having a wall of the desired thickness which thickness will depend upon the thickness of the sheet and the number of sheet serves to give convolutions. After the cylinder is formed, it is subjected to high heat and pressure whereby the successive convolutions are intimately joined together thus forming a hard and densifiedv product. The union of the convolutions is greatly promoted by the par ticles of waterproofing material which become fused by the heat and effectively cause them to' become intimately united. The fibrous material distributed throughout the more strength and rigidity to the product than could be obtained by using fibrous or waterproofing material alone.

The invention will be readily understood by reference to the accompanying drawings in which, 7

Figure 1 is a view showing the sheet coming from a paper-making machine and being wound up;

Fig. 2 is a view showing how the cylinder may be heated and compressed; and

Fig. 3 1s a view showing another way of heating and compressing the-cylinder.

Specification of Letters Patent.

this invention a quantity of.

Patented June 28, 1921.

Application filed August 26, 1918. Serial No. 251,536.

of the same into the paper-making machine- Where it is formed into a sheet on the cylinder 0 and passes out along the blanket 1 as indicated. Any other suitable means may be used for forming the sheet, the papermaking machine being indicated merely for illustrative purposes. The amount of water proofing material may vary from to 90% or more of the weight of the water free content of the finished material, and will preferably be introduced in the form of filaments or shot when an ordinary papermaking machine is used.

The sheet 2 passes over the suction box 3 where a portion of the water is extracted, and then passes between the rollers 4 where more of the water is squeezed out. From the squeeze rolls 4 the partially dried sheet 2 may be wound up into a cylinder 5. upon a mandrel M, or formed into a cylinder in any other convenient manner so that the successive convolutions are in contact with each other. When a sufficient number of turns have been taken to produce a cylinder 5 having the desired thickness, the sheet 2 is severed and the cylinder 5 is dried and then subjected to heat and pressure which serves to fuse or melt the waterproofing material so that the convolutions become joined together and the material becomes greatl densified. 4

Di erent means may be used for heating and compressing the cylinder 5 to densi'fy the same and unite the convolutions. The ones shown in Figs. 2 and 3 are for illustrative purposes' a In Fig. 2, the cylinder 5 upon the mandrel 6 is shown surrounded by a number of pressure rollers 7 which cause the layers to become united to produce a substantially homogeneous cylinder. The mandrel M and rollers 7 may be heated by heatin means indicated at 8, and the mandrel will be of such strength as to sustain thecompressive force. of the pressure rollers 7, as the cylinpressed while being revenient manner after the heating and pressingloperation is completed.

. any modifications of the details of the invention will suggest themselves to those skilled in the art. he sheet 2 may be made only a few hundredths of an inch thick, and few or many convolutions may be used for the cylinder 5; the sheet 2 ma be made of different widths to form cylin ers of different lengths; the diameter of the mandrel M may be varied through a very wide range so as to produce cylinders of different sizes; mandrels of different. shapes such as square, rectangular, etc., may beused and may be made to bulge out in the middle so as to produce hollow articles somewhat in the shape of barrels, .as the sheet 2'will conform closely to the outline of the mandrel upon which it is wound; the beginning and end of a sheet 2 which forms the cylinder- 5 may have a larger proportion of waterproofing material than the middle portion, thus producing a cylinder having a smaller proportion of waterproofing material in the interior than near the inner or outer surface;

the water may be entirely or substantially entirely dried out of the sheet 2 before it is wound up, or the sheet 2 may be wound up in a wet or damp state; and additional waterproofing material in liquid or comminuted form may be applied to the surface of the sheet 2 as it is being wound up.

Some of the essential differences between this invention and that disclosed in my coending application Serial No. 194,77 5 filed ctober 4,1917, are that I use heat and pressure in this case to unite the layers initimately and do 'not find it necessary to saturate the finished. article with liquid Waterproofing material.

Where the term cylinder is used in the specification and claims it is intended to include bodies which have circular as well asother shapes incross-section, and also bodies whose diameters may be the same or may vary Claims:

1. As a new article of manufacture, a hollow cylinder containing mixed fibrous and waterproofing materials which have been sufficiently densified by heat and pressure to produce a substantially homogeneous and rigid product.

2. As a new article of manufacture, a

considerably in different portions.

' rigid cylinder containing fibrous and waterproofing materials, the waterproofi g mateducing a, hollow cylinder rial being in excess of the fibrous material, said cylinder having been densified by high heatand pressure.

3. As a new article of manufacture, a rigid cylindrical body comprising layers of mixed fibrous and waterproofing materials wvhich'have been intimately united by heat and pressure so as to produce a substantially homogeneous product.

4. As an article of manufacture, a hollow cylinder comprising a plurality'of layers of fibrous and waterproofing materials in substantially the proportions of one to three,-

which have become intimately united with each other by heat and pressure.

5. As'an article of manufacture, a hollow cylinder composed of a plurality of sheets which have been intimately united by heat and pressure to produce a substantially homogeneous product, said sheets M containing a felted mass of fibrous material and bituminous material in excess of the fibrous material.

6. The herein described process of pro ducing a hollow cylinder which comprises the steps of forming a sheet of mixed fibrous and comminuted waterproofing material, winding said sheet into a roll, and subjecting said roll to heat and pressure so that the bituminous material becomes fused and the convolutions firmly united.

7. The herein described process of producing a hollow cylinder, which comprises the steps of forming a sheet of mixed fibrous and comminuted Waterproofing materials, winding said sheet into a roll, and heating and pressing said roll to unite the convolutions.

8. The herein described process of producing a hollow cylinder which comprises the steps of providing fibrous material, mixing therewith more comminuted bituminous material than the weight of the fibrous material, forming a sheet of the mixture, winding said sheet into a roll, and heating and pressing said roll to unite the convolutions.

9. The herein described process of producing a hollow cylinder which comprises the steps of forming a sheet of mixed fibrous and comminuted bituminous materials, having a larger proportion of bituminous material than fibrous material, winding said sheet to form a cylinder, and subjecting said and comminuted waterproofing materials on a paper-making machine, windingsaid sheet upon a mandrel, and subjecting said wound sheet to heat and pressure so that the bituminous material becomes fused and the convolutions firmly united.

12. The herein described process of producing a hollow cylinder which comprises the steps of forming, as a moist sheet, a

layer of mixed fibers and comminuted waterproofing materials, winding said sheet into a roll and drying, heating and pressing said roll to unite the convolutions.

13. The herein described rocess of producing a hollow cylinder w ich comprises the steps of forming a sheetof mixed fibers and comminuted waterproofing materials, windlng said sheet upon a mandrel, and SllbjGCtlllg said wound sheet to heat and pressure so as to make the mass substan-' tially homogeneous throughout.

14. The herein described process of producing a hollowcylindcr which comprises the steps of forming a sheet of paper-making fibers and comminuted pitch, winding said sheet to form a cylinder, and subjecting said cylinder to heat and pressure so that the pitch becomes fused and the convolutions become united.

In testimony whereof I afiix my signature.

RAY P. PERRY.

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