US1735427A - Production of fiber articles - Google Patents

Description

Patented Nov. 12, 1929 UNITED STATES PATENT OFFICE MEYRL M. FROST, OF CAPAG, MICHIGAN PRODUCTION OF FIBER ARTICLES No Drawing.

w taking an excellent finish.

Other objects will readily appear to those skilled in the art upon reference to the following description. 1

Heretofore, such articles of manufacture as chair or toilet seats, doors, boxes and the like have been usually made of wood pieces glued or otherwise secured together. WVood has been considered the only suitable material because of its plentifulness and also because of its low heat conductivity. However, due to its property of absorbing moisture, it is diflicult if not impossible to build up an article, such as a toilet seat, from pieces of wood glued together and have the pieces adhere permanently.

The present process producesan article that is not built up of pieces but is of homogeneous composition, waterproof and has all of the advantageous properties of wood.

The process is carried out by first forming so a fluent pulp of fibrous material, such as ground wood pulp or pulp of rag fiber, waste paper, hemp, jute or even asbestos to the pulp,

having preferred from four to twenty per cent solids added rosin soap to fifty per cent 85 of the total solids. This mixture is agitated and pumped into suitable dies where the water is expressed andv the article formed under a pressure depending on the article to be produced, up to about six hundred pounds per square inch. The formed article is then removed from dies and dried and rough finished if necessary. I

After'the drying step the article is then dipped in a molded solution of six parts sulphur three parts rosin and one part paraffin and allowed to remaina short time say from live to fifteen minutes or longer if necessary to allow the sulphur, rosin, and paraffin which is quite fluid to impregnate to some extent after which it is allowed to cool. If it Application filed August 20, 1927. Serial No. 214,439.

is desirable to completely impregnate the article should remain in this solution for a considerable period. The thus treated article is then painted if desired and is ready to be marketed.

The treatment with the sulphur solution of six parts sulphur three parts rosin and one part p'arafiin by dipping and submergin'g for a short time is sufficient for ordinary r purposes but if desired to impregnate deeply pressure methods such as are used to impregnate other porous articles may be used. Such methods consists in subjecting to pressure. this impregnation and special coating renders the complete fiber article until water proof and there is thus produced on that strength and substantially permanent.

Now having described the invention and the preferred form of embodiment thereof it is to be understood that the said invention is to be limited not to these specific details herein set forth but only by the scope of the claims which follow:

1. The process of producing homogeneous fiber articles which consistsin forming a pulp of the fiber in finely divided condition with water, mixing with said pulp an adhesive,

expressing said water and moulding the fiber under high pressure drying and subjecting the mold to an impregnation treatment with a solution of six parts sulphur, three parts rosin and one part para'fiin.

2. This process of producing homogeneous fiber articles which consists. of forming a pulp of finely divided condition with water 'mixing with said pulp an adhesive, expressing said water and molding the fiber under high pressure up to six hundred pounds per square inch drying and subjecting the molded article to impregnation, treating with a solution of six parts sulphur, three parts rosin and one part parafiin.

3. An article of manufacture comprising a hard tough body of finely divided organic fiber and an adhesive material with a coating and atleast a superficial impregnation with a solution of six parts sulphur, three parts rosin and one part paraffin.