US878485A

US878485A - Manufactured leather.

Info

Publication number: US878485A
Application number: US35615507A
Authority: US
Inventors: Alfred Wells Case
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-02-07
Filing date: 1907-02-07
Publication date: 1908-02-04
Anticipated expiration: 1925-02-04

Description

unrrnn STATES PA -Eur orrrcn.

ALFRED WELLS CASE, OF HIGHLAND PARK, CONNECTICUT.

\ MANUFACTURED LEATHER.

Specification of Letters Patent.

Patented Feb. 4, 1908.

Application filed February 7, 1907. Serial No. 356.165-

T 0 all whom it may concern: Be it known that I, ALFRED WELLS CASE, a citizen of the United States, and a resident of Highland Park, in the county ofHartford and State of Connecticut, have invented a new and Improved Manufactured Leather, of which the following is a specification.

- My invention relates to the manufacture of comparatively thick sheets of material from fiber, and more particularly to such sheets as are partially orwholly formed from animal fiber.

The object of the invention is the production of a piece or sheet of such material that shall possess throughout the entire mass properties of consistency or density which are material in the articles usually produced. from such sheets; and a further object of the invention is to provide means for properly stiffening sheets or pieces of such material to the required degree and maintain them in this condition until such time as they may be required for use for manufactur ng purposes; and a furtherobject of the invention is to e to such sheets properties which will enab e a nice finish to be given to the articles made therefrom.

In the manufacture of sheets of comparatively thick material from fiber, and more especially that class commonly known as leather board, the leather scrap or like material, either alone or mixed with other fibrous matter, is reduced to pulp by a beating engine or the like, which by well-known treatment is formed into sheets or board of the desired thickness. ably dried asby the action of the elements, orby' artificial means. in using the board for manufacturing 1purposes it is desirable that the sheets shal have considerable density and consistency and shall-have within certain well defined limits proper qualities as to stiffness. it is also desirable to give to articles formed therefrom a certain degree of finish, and as such articles are, in many in stances, formed from superimposed layers or pieces of material, the edges of which.

form the surface of the finished article it is evident that such material shall possess throughout the entire thickness of the mass qualities to enable the articles made therefrom to take the desired finish, and to produce the best results that the ualities as to density and consistency shal be present throughout the entire mass.-

I have found by extended experiment that The sheets are then suit rosin, if properly distributed throughout the mass, Wlll give the board proper qualities as to density and consistency and also as to stiffness, and will also roduce an article which will receive a nlce finish; how to roperly introduce the rosin into the mass, liowever, has been a problem The rosin can not be introduced to the.

pulp for the reason that it not only gums up the machinery to such an extent as to practically preventits operation, but the rosin thus introduced will be in granulated form, which, upon melting, under the heat to which the sheets must subsequently be subjected leaves cells throughout the mass formerly occupied by the grains of the rosin. This forms a cellular mass which is extremely objectionable. If the rosin is melted and the sheets immersed in a bath it is found that the rosin chills so quickly as to. that part in contact with the sheet that it permeates but very little if at all into the sheet. The rosin mixed with othermaterials has been applied. to the sheets as a size,.but it has been found that such treatment produces little, if any, effect in causing the rosinto penetrate the fiber. After extended experiment i. have found, however, that a liquid composed of a greasy or oily substance, as wax-or mineral oil, either or both, mixed with the rosin,

heated to the proper degree and applied to vehicle to convey the rosin throughout the entire mass, but maintains the rosin in a liquid state and prevents such chilling as to cause the rosin tic assume granular "form. The rosin, inaddition to giving the qualities above described to the sheets of material, also acts to a certain extent as a water-proof ing substance, and its mixture with the mineral oil or wax, or both, thorpughly waterproofs the sheets and preserves them n a pliable state, while maintaining the required density and stiffness for indefinite lengths of time and until required for manufacturing purposes.

I have found. that very beneficial results are obtained in a bath heated to about 180 degrees. The proportions of the Wax or mineral oil may be'varied to any extent, and, in fact, wax alone or mineral oil alone may be mixed with the rosin and produce satisfactory results. The hi her the proportion of Wax to the mineral 0' the better will be the grade of the leather board. Sheets treated with mineral oil and rosin alone sup: ly a "large demand forcertain classes of wor and *hence it ,will be obvious that the better the grade of work required the more wax in proportion to the mineral oil should'beused; he proportion of the rosin maybe varied almost indefinitely, depending upon the de-- greeof finish required or the amount of densitynor consistencyde'sired. making the mixture the mineral oil'is employed as an element for the reason that' the rosin and 'waxwill bet-retained in the tem erature. 4

e I have found oil or wax to possess the necessary greasy or oily properties, and

which will serve the desired end. I

invention and desire 4 also the necessary penetrating'properties'to produce excellent results, yet it is obvious.

that other greasy or oily substances maybe employed, and as these materials resist the entrance of water into, the sheets of fiber board described herein-I have termed the material used with the rosin a water resist, this includingany greasy or oily substance What I claim as'm to secure by Letters atent is:

As an improved article of manufacture, a

sheet of leather boardforme'd from leather pulp material and after bein formed and dried treated'to a bath'inclu ing resin and heated mineraloil. Y 1

ALFRED WELLS CASE.

Witnesses:

ARTHUR B. JENKINS,

LENA E. BERKOVITCHf