USRE2596E - Improvement in tanning - Google Patents

Description

guitar. gist 25 gaunt g f JOHN M. MULLER, I OH COBLESKILL, NEW YORK. Letters Patent No. 50,945, dated November 14, 1865 reissue No. 2,596, dated Zifay 711867.

IMPROVEMENT IN TANNING.

TO-ALL WHOMIT MAY CONCERN! Be it known that I, JOH N M. MULLER, nowof Cobleskill, in the county of Schtoharie, State of New York, but formerly of North BsckeQin the county of Berkshire, and Commonwealth of Massach usetts, have invented a new and useful Process of Tanning Hides; and I do hereby declare thatthe following is a full, clear, and exact description thereof, g p

The first part of my invention consists in makingu strong ooze of yarrow and black birch bark; or willow bark, in which liquor thelhide s are to liei'or' about ten days, and handled everyday. The liquor is again strengthened, and the hides subjected to itfor the space of ten days more, at which time the tanning will be complete. For one hundred'sides I take one-half of a. cord of black biro" willow bark, to which are added about five hundred pounds of yarr'ow. These substances canbe leached several times in warm water, to obtain the full benefitof the tanning principlo'in them. which will maketho liquor strong-enough for ten days-t tanning, afterwhich-the liquor should bestrengthe'ned again by another leaching.

The second part of my invention consists iu'subjecting stufi'ed hides or leather to the action of a steam bath, as follows: i I

I take a strong solution of an one made fr om the same substances which I employ in the previous process of tanning, or other astringent liquors and place the same in a suitable vessel, and raise it to a tempe'rature, say of 1409, or thereabouts, andthen dip the hides, after they have been properly stufi'ed and driechinto it, allowing them to remain from five to fifteen seconds, more or less, according to the terture and condition of the leather. The object of this second treatment is to cause a thorough permeation of the leather by the tallow or greasewhich is 'applied in the'process of stufling or rubbing.- The steam acting upon the stuffed leather, will not only strikein the grease, but it will also'close up the pores of' the leather, and render it water-proof, and at the same time soft. and pliable. The steaming process may also be conductediu a tight vessel of such capacity as to contain a considerable number of hides, and this treatment will be found very beneficial to leather which has notbeen previously stufl'echfor increasing its solidity and durab-ilityl h I do not confine my invention to the precise proportions of the ingredients horein'r'ncntioned for tanning the hides, nor to the length oftime stated 'for completing the tanning process. I have found the proportions herein stated to Work w,ell and to make very good leather, but other proportions. may be found to answer equally as well. lVith regard to the process of, steaming the skins after they have been tanned, I will state that the hides may be tanned in the usual manner, by auy of the knowntnnning compounds or liquors, andjhe tanned skins may be .stufiedf' or not, previously. to subjecting them to the steam bath. I

Having thus described-my process of tanning hides, what I claim as new-and of my invention, and desire to secure by Letters Patent,-is I 1. A tanning ooze, which is made-from the ingredients herein mentioned, and combined in about the proportions set forth.

2. The combination and use of yarrow with other astringent substances for making an ooze for tanning. 3'. subjecting stufl'edor u'nstnlfed skins or leather to the action of a steam bath substantially as described.

JOHN M. MULLER. [L. 8.] Witnesses:

STANTON Gonnrsn, G120. D. STANLEY.

n bark, and a similar quantity of