US925128A - Paper material. - Google Patents

Description

M. A. MGGUIRE.

PAPER MATERIAL.

APPLIOATION FILED Nov.1e, 1908.

925 ,1218. Patented June 15, 1909.

v f7/form? MICHAEL A. MCGUIRE, OF CINCINNATI, OHIO.

PAPER MATERIAL.

Specification of Letters Patent.

Patented June 15, 1909.

Application led November 16, 1908. Serial No. 462,848.

To all whom it 'may concern:

Be it known that I, MICHAEL A. MoGUInE, a citizen of the United States, residing in Cincinnati, county of Hamilton, and State of Ohio, have invented certain new and useful Improvements in Paper Material, of which the followinnr is a full, clear, and eX- act description, reference being had to the accompanying drawing, forming part of this specification.

My invention relates to improvements in what is known as vulcanized ber for use in the manufacture of trunks, suit cases and the like, and it has for its object, to render such material elastic and better adapted to stand the strains o usage than the paper material now in use for such purposes.

For many Vyears it has been customary to use vulcanized ber for the manufacture of packing cases, trunks and the like, but the great objection to the use of the material is that when indented by rough handling, or contact with other baggage, there is not sufcient resiliency in the material, and the depressions and marks of rough usage remain permanently.

My invention consists in embedding in the paper ber in the manner and for the purpose to be hereinafter particularly pointed out and claimed, a mat or mesh of thin spring steel strips, whereby the necessary resiliency will be imparted to the paper material.

In the drawin Fi re l is a perspective view of a sheet o my lmproved paper board, with a portion of the upper portion of the sheet removed down to the steel mat. Fig. 2 is a cross section of the same.

In carrying out my invention, I rst weave a mat of thin and fiat strips of spring steel 1 and 2, as shown in Fig. 1, and this mat is then subjected to a bath ofgrained shellac varnish to render same thoroughly water proof. I then take sheets of vulcanized ber paper material-and subject them to a steamvging process'to thoroughly soften and I then dry one side of each sheet by subjecting same to heat, and I then lay the steel mat between the two sheets with the dried surface toward the mat, and then subject the sheets to hydraulic pressure, which forms one homogeneous mass of ber material 3, with the steel springsembedded in the mass, so that a new sheet of vulcanized ber results with the steel strips an integral part of the paper board.

Instead of making use of vulcanized ber material after the same has been manufactured, and is ready for use, and then softening saine by steam, the spring steel mat may be embedded in the ber during theprocess of the manufacture of the ber material. That is to say, after the treatment of the paper pulp by which the vulcanizin is effected, and before the sheets are ro led or subjected to other pressure, and while the sheets are still soft, the mat may be embedded between the sheets.

I am aware that it is old to embed wire mesh in paper pulp fabric, but the embedding of such wire mesh in vulcanized ber material, would not impart to the vulcanized ber the quality of elasticity which will overcome the objections above referred to in the use of such material for the manufacture of trunks, packing cases and the like.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is:

1. As a new article of manufacture, elastic sheet material consisting of flat spring steel' strips interlaced together to form at mat com letely embedded in layers of Vulcanized ber whereby at contacting surfaces are provided to permit of the ready adherence of the layers of vulcanized ber substantially as described.

2. The process of manufacturing elastic sheet material for trunks and the like, which consists in softening sheets of vulcanized ber by the application of steam, then drying one side of each sheet by the application of heat, then laying a mat vof spring steel strips previously subjected to a ath of anti-rust material between the softened sheets with dried 'sides together, and then uniting the sheets Witnesses:

ROBERT P. I-IAnerr'r, 4Bassin A. BEAU..

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