US1540563A - Method of forming protective linings - Google Patents

Description

June 2, 1925.

E. L. OLIVER METHOD OFFORMING PROTECTIVE LININGS Filed Jan. 30. 1923' lll!!!lllllllllllllllilllllllillllllllilflllll R. E R V w m T A. Y B

Patented June 2, 1925.

UNITED STATES METHOD OF FORMING PATENT OFFICE.

EDWIN LETTS OLIVER, F PIEDMONT, CALIFORNIA.

PROTECTIVE LININGS.

Application led January 30, 1923. SeriaI No. 615,946.

' acitizen of the United States, and a resident of Piedmont, county of Alameda, State of California, have invented new and useful Improvements in Method of Form ing Protective Linings, of which the following is a specification.

My .invention has for its object the lining of structures otherwise liable to corrosion and is particularly applicable to metal or wooden structures such as tanks, vats, vessels, and the like, whereby the said structures are suitably protectedl from any corrosive liquid or gaseous substances, confined in or traveling through the said structures.

My invention is also particularly applicable to protection against erosion of cutting material. It is well known that mining s'limes, particularly those of an abrasiveA nature, and material containing quartz generally, as also mixtures employin abrasives in industries as emery and car orundum, have a particularly erosive, action upon steel or metallic containers or conduits and in such cases the application of a rubber lining as here set forth forms a complete protection to the metallic supporting structure whether it be a trough, tank or conuit.

These objects I accomplish by covering the inner surface ofsuch a structure -with a coating of relatively elastic material, held in place by means ofwire-netting or mesh, or sheet metal screen, and which has been previously affixed to or formed in the body of the structure to be protected.

By referring to the accompanying drawings, my invention will be made clear.

Figure 1 is a cross section of a'conventional tank of sheet metal to which my protecting lining has been Japplied.

Fig'. 2 is afront view of the wire netting. and screws in lplace ready for fastening.

Fig. 3 is an enlarged cross section through a portion of thel wall of the tank with the wireI mesh in place thereon and the coating of protective material being applied.

Fig-4 is a front view of sheet metal punched for receiving the protective coat-x ing and adapted to be used in the same way as Fig. 4 to which the as the wire nettin 2. L

Fig. 5 is a section through a plate such protective coating has been applied. J

As is well known. rubber has especially valuable resisting qualities to the action 0f acid, alkalis or abrasive substances in motion, and in the figures above set forth 'I have assumed the use of rubbber as the non-corrosive and non-erosive substance to be employed as `the lining, although it will be understood that other relativel elastic substances may be employed 'in t. esame manner.

Throughout the figures similar numerals referto identical parts.

The numerals 1, 1 indicate the -walls of a tank or vat of` iron, steel or wood supported on sills 2, 2, 2, 2, and having my rubber or other protective lining 3, by'which the contents 4 is prevented at all times from coming in contact with the side walls 1 or bottom 5 of the said tank. At 6 is shown a wire mesh or netting which is superimposed upon the interior surface of the walls aol and .bottom 5 and preferably c arried over the upper edge thereof as shown at 7 in Fig. 1. This wire mesh is .suitably anchored at various points as 8, 8, as by spot welding or riveting to the Surface 1 if the latter is of metal, or it may be fastened by a screw 9 into a wooden tank or vat wall l as shown Ain Fig. 3, and if the space to be protected is a: relatively large area or the wire mesh of relatively light weight, it is advantageous to support the mesh 6 in spaced relation to the plate or wall 1, by the employment of thev spacing rings or blocks 10.

The protective material 3 I employ ina plastic state, preferably in the form of sheets for laying against the wire mesh as `shown in Fig. 3. When the sheets are in place I employ a roller 11, or other suitable pressing means., whereby the plastic material is pressed against and flows around Y the individual wires of the Wire mesh, thus securing an embedding of the mesh in the reinforcing of the latter. The rubber can l then be vulcanized in place in any well known manner.

By referring to Fig. 3 it will1 beseen that the plastic material under the action of the pressure abovevdescribed flows through the opening and around the wire mesh or edges of the metal plate, at all points except where the mesh is in contact with or is held against thev container surface, and at these latter points its full thickness is maintained over thev rivet or screw' head as the case may be. It will thus be seen that the tank shown in Fig. 1' has a complete lining of non-corture from corrosive or erosive action or both.

In some instances it is advantageous to employ punched sheet metal in place of the Wire screen for the purpose of supporting the protecting lining and in such case a screen such as shown in Fig. 4 may be em-l ployed and which may be spot Welded or riveted at intervals or otherwise supported from the wall of the tank. rlhe protective material may then be placed upon both sides of such a screen and pressedthrough the holes so that the two layers of protective material are in eect welded together through the interstices oit' the metal screen. This plate form of supporting the lining shown in Fig. 4 has the advantage of being subject to less distortion, especially for temperature changes, and also provides frequent points of support for the non-corrosive lining as at each of its perforations. Moreover in 'certain structures the body of the tank itself may be formed of such metal screen as shown 1n Fig. 4 or a section as shown in Fig. 5.

Although I have described my invention asapplied to a tank and to prevent the corrosive or erosive action of the contents upon the surfaces of the tank, it will now be seen that my invention may also be employed in troughscontainers or conduits, in which the liquid contents is completely sealed from the metallic walls by my coating.

I claim: c

1. The method of protecting a surface which consists of securing a supporting screen over said surface at a plurality of points and in spaced relation therewith and thereafter overlaying said screen by pressing a plastic rubber composition over the screen until the said screen is embedded in said composition, and then vulcanizing said rubber` in place.

2. The method of providing a container with a non-corrosive lining which consists of securing a metallic screen to a surface of said container by aiiixing it at a plurality of points and in spaced relation with said surface, and thereafter pressing plastic rub-l ber around the screen and against said surface so that the mesh is entirely embedded in the rubber, and then vulcanizing said rubber in place.

3. The method of providing a container with a non-corrosive lining which consists of a-tixing a perforated backing to the inner surface of said container in spaced relation thereto, thereafter pressing lastic rubber against said backin and t ereby forcing a part of it throug the perforations against said container while theremainder entirely overlays the backing to form a lining and 'then vulcanizing the rubber iny place.

EDWIN LETTS OLIVER.

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