US293364A - Process of tanning hides - Google Patents
Process of tanning hides Download PDFInfo
- Publication number
- US293364A US293364A US293364DA US293364A US 293364 A US293364 A US 293364A US 293364D A US293364D A US 293364DA US 293364 A US293364 A US 293364A
- Authority
- US
- United States
- Prior art keywords
- vats
- liquor
- hides
- vat
- hide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 32
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 12
- 235000015450 Tilia cordata Nutrition 0.000 description 12
- 235000011941 Tilia x europaea Nutrition 0.000 description 12
- 239000004571 lime Substances 0.000 description 12
- 238000004140 cleaning Methods 0.000 description 6
- 238000010025 steaming Methods 0.000 description 6
- 239000010985 leather Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 235000007173 Abies balsamea Nutrition 0.000 description 2
- 240000006523 Abies balsamea Species 0.000 description 2
- 235000016976 Quercus macrolepis Nutrition 0.000 description 2
- 244000305267 Quercus macrolepis Species 0.000 description 2
- VXMKYRQZQXVKGB-CWWHNZPOSA-N Tannin Chemical compound O([C@H]1[C@H]([C@@H]2OC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)O[C@H]([C@H]2O)O1)O)C(=O)C1=CC(O)=C(O)C(O)=C1 VXMKYRQZQXVKGB-CWWHNZPOSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000010871 livestock manure Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 235000018553 tannin Nutrition 0.000 description 2
- 229920001864 tannin Polymers 0.000 description 2
- 239000001648 tannin Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C1/00—Chemical treatment prior to tanning
- C14C1/06—Facilitating unhairing, e.g. by painting, by liming
Definitions
- My object is to lessen the bark used
- the accompanying drawing shows the internal arrangement of a tannery.
- vats markedAareleaching-vats
- B layer-vats
- C lime-vats
- D bedmill
- E color-mill
- F hidemill
- G receiving-tank for distributing the liquor after being used
- I-I soaking-vats.
- the first operation is to put the hides into freshwater for five or six hours, then into the
- the hide-mill is a vat having a long wheel with-open buckets that, as it revolves, stirs up the hides; then into fresh water-in the summer, thirty-four hours, in the winter, thirty-six hours; then back into the hiden1illonehalf hour. After this operation all the superiiuous flesh is taken off by the ordinary means. It is then put into the several lime-vats and changed from one to another until the hide has been into ve 1ime-vats.
- the lime-water in the iirst vat must be 25 in strength, and the hide remains Y therein one day.
- the bed-mill is similar in construction to the hide-niill-that is, the vat has a revolving wheel in it to agitate the hides.
- the mill is run five hours and the hide remains in twelve hours ,after the stoppage of the wheel.
- the hide is then put into the hide-mill and washed clean in cool water. It is then soaked in temperately warm water about one to two hours. Then the fine hair is taken-off. Itis then put into the color-mill, the liquor of which is made of hemlock or oak bark and water, and must be 4 to 5 of strength.
- the hide is left in three hours, and stirred by a moving wheel therein or otherwise. Then it is taken out and put into the handling-vats.
- tanning hides consisting in, first, treating the hides in fresh Water and in the hide-mill; second, placing the hides inthe lime ⁇ vats untilV the coarser hair is taken off;
- hidesA in a bed made of human excrenient or fowl-manure; fifth, Washing the hides clean; sixth, soaking them in Water until thefinehairy is taken off; seventh, placing the hides in a coloring-mill; eighth, then placing them yinhandling-vats; ninth, placing the hides in thelayervats, substantially as described.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Description
(No'Model.) L. SOHN-ADEL.
PROCESS OP TANNING HIDES.
No. 293,364..v atented Feb. 12,`]l884.
' hide-mill for one-half hour.
IJNiTnD STATES' PATENT Orman..
LOUIS SOHNADEL, OF CHICAGO, ILLINOIS.
PRocr-:ss oF'TANNmci-lloes. 4
SPECIFICATION forming part of Letters Patent No. 293,364, datedFebruarylZ, 1884.
Application led June 23, 1883. (Nomiodel.)
My object is to lessen the bark used, and
produce a better leather in less time, and add more weight to it.
The accompanying drawing shows the internal arrangement of a tannery.
The vats, markedAareleaching-vats; B, layer-vats; C, lime-vats; D,bedmill; E, color-mill; F,hidemill; G, receiving-tank for distributing the liquor after being used; I-I, soaking-vats.
The first operation is to put the hides into freshwater for five or six hours, then into the The hide-mill is a vat having a long wheel with-open buckets that, as it revolves, stirs up the hides; then into fresh water-in the summer, thirty-four hours, in the winter, thirty-six hours; then back into the hiden1illonehalf hour. After this operation all the superiiuous flesh is taken off by the ordinary means. It is then put into the several lime-vats and changed from one to another until the hide has been into ve 1ime-vats. The lime-water in the iirst vat must be 25 in strength, and the hide remains Y therein one day. It is then changed into the second vat, the limawater being 26, and re-` mains one day. It is then changed into the third vat, the lime-water being 28, for one day; then into the fourth vat, the linie-water being 32, for one day; then into the fifth vat,
e the lime-water being 35, for one day. If any change is made in these several periods of time, the lime water must be changed in strength in the same proportion. The hide is then put into a sixth vat of pure water. This is followed up until three several packs have passed through the several vats. By this time a large quantity of lime has been deposited in the fresh-water vat. I then draw out the exhausted lime-water in No. 1 and add to No. 6 one barrel of lime, and ll No. 1 with fresh water, and then follow that up with three more packs of hides in the same manner. By thus going around continuously I make and keep the lime water of a right degree of strength, and economize the lime. The -water must be kept at in the summer and .80 in the winter. The hide is then washed in the hide-1nill until the lime is entirely cleaned Off.
one-half bushel to one hundred heavy hides;
one bushel to a hundred light sides; threefourths bushel to one hundred light kips; onehalf bushel for two hundred calf.
The bed-mill is similar in construction to the hide-niill-that is, the vat has a revolving wheel in it to agitate the hides. The mill is run five hours and the hide remains in twelve hours ,after the stoppage of the wheel. The hide is then put into the hide-mill and washed clean in cool water. It is then soaked in temperately warm water about one to two hours. Then the fine hair is taken-off. Itis then put into the color-mill, the liquor of which is made of hemlock or oak bark and water, and must be 4 to 5 of strength. The hide is left in three hours, and stirred by a moving wheel therein or otherwise. Then it is taken out and put into the handling-vats. lThe operation there is to change it from one to the other until it has passed through six vats, remaining a day in each, 'the liquor of each one increasing one-fourth of a degree in strength up to the last vat. It is then put into the layer-vats, which consist of a layer of hides and a layer of fine bark in as many layers as required, and changed from one to another until it has been in five successive vats, having the liquor in the following degrees or" strength and remaining the following lengths of time: in the rst layer-vat three days, liquor 8 to 9; then into vat No. 2, six days, liquor 10- to 11; No. 3 vat, nine days, liquor 12 to 13; No. 4 vat, twelve days, liquor 14 to 15; No. 5 vat, {ifteen days, liquor 17 to 18. By this process the hide is gradually permeated by the liquor. The liquor of these vats must be especially prepared according to my plan, both to get good liquor andget all the strength out of the bark. The bark is ground into the several leaching-vats, made of wood, and in any desired shape and size, and six or more in number. I use six to a set, so that the process IOO hereinafter stated makes the entire revolution used in the layer-vats and tempered to suit f above stated the liquor as it passes through 1the fresh bark is filtered and strengthened.
the several layer-vats, as hereinbefore stated, then part of' the exhausted liquor of'the handling-vats is run into the color-mill, as much as is necessary to fill it. rlhe remainder of thelaquor in the handling-vatsis run over thesameleach: No. 1, and, being strengthened' and purifiedis run back into they handling`vats.l I can run \weak liquor over this leach from; the; storage.- vtank until time for steaming, which comes.
every sixv days, Whensix vatsareused," In the meantime leach No. 3A having been treated as No. 1 therewill be asmallpercentageo tannin left inthe bark. I nowsteam it and the residue is passed over into. the: next vat and. goes on with the other liquor,- getting cool beforebeing used'. This is of the greatest importance, as unless` it is cool it spots the hide; andY rots it. The saine processl is usedA in all of the several vais-that is, the bark ink No. 2, being treated and exhausted as No., 1 it is thrown out and lledWit-hfresh-ground bark, and While this is being run overby'exhausted liquor, as No. 1, No. 4 is ready for steaming, that vat having been, treated asl No. l, so that by filling and treating each as abovedescribed p I keep rotating the leaching and steam-ing in succession throughout any space of time, and by thus continuallyV using the liquor over and` Q ruiming it through fresh-ground bark it gains strength and is cleared of impurities deposited in it by hides having been through it. 'Ihis is the only means by Which hides can be treated Without a risk of spoiling. By the ordinary process large quantities of hides are lost in the tanneres of the country. 'Often Whole yards are lost by the liquor not being kept l"pure, whereas I can by the above-mentioned process keep the liquor pure and prevent that I loss.
It can easily be seen bythe several leachings By this process I am enabled to make a saving of forty per cent. of the bark, a desirable obect as that article is 0rowing scarce ever 7 ZD b year. I also make the leather in a shorter yspace of time andy add more Weight to a hide,
and produce abetter article, -and prevent any loss in the beam-house, Where great loss often takes place.
Vhat I claim, and am desirous of securing by Letters Patent, is-
The process of tanning hides consisting in, first, treating the hides in fresh Water and in the hide-mill; second, placing the hides inthe lime`vats untilV the coarser hair is taken off;
hidesA in a bed made of human excrenient or fowl-manure; fifth, Washing the hides clean; sixth, soaking them in Water until thefinehairy is taken off; seventh, placing the hides in a coloring-mill; eighth, then placing them yinhandling-vats; ninth, placing the hides in thelayervats, substantially as described.
. LOUIS SCHNADEL.
Witnesses.:
J As. LORENZO GAGE, Louis W. H. Nnnrv.'
third, Washing thehides; fourth, placing the
Publications (1)
Publication Number | Publication Date |
---|---|
US293364A true US293364A (en) | 1884-02-12 |
Family
ID=2362551
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US293364D Expired - Lifetime US293364A (en) | Process of tanning hides |
Country Status (1)
Country | Link |
---|---|
US (1) | US293364A (en) |
-
0
- US US293364D patent/US293364A/en not_active Expired - Lifetime
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Coxe | A View of the United States of America, in a Series of Papers, Written at Various Times, between the Years 1787 and 1794 | |
CN105803131B (en) | A kind of process for tanning of leather | |
CN103290148B (en) | Process for making goat denim line simulated upper leather | |
CN113308581B (en) | Production method of clean cowhide plain nappa sofa leather | |
GB1290347A (en) | ||
US293364A (en) | Process of tanning hides | |
KR950014924B1 (en) | Non-chrome tanning process | |
Welsh | Tanning in the United States to 1850: a brief history | |
Vankar et al. | Sodium sulphate as a curing agent to reduce saline chloride ions in the tannery effluent at Kanpur: a preliminary study on techno-economic feasibility | |
Karabay | Waste management in leather industry | |
US1173182A (en) | Method for the tanning of hides and skins. | |
US50998A (en) | Improvement in tanning | |
US3639A (en) | Tahwi | |
CN109295267B (en) | Process for preparing high-grade mink fur and leather by using chromium-free multi-metal tanning agent | |
DE855981C (en) | Device for the production of malt on one or more rotatable round trays | |
Davis | The Manufacture of Leather: Being a Description of All the Processes for the Tanning and Tawing with Bark, Extracts, Chrome and All Modern Tannages in General Use... with Special Reference to the Best American Practice; to which are Added Lists of American Patents (1884-1897) for Materials, Processes, Tools, and Machines, for Tanning, Currying, Etc | |
US60701A (en) | Improvement in tanning | |
US222944A (en) | Improvement in finishing leather | |
US81237A (en) | Improved composition for tanning | |
US2756A (en) | Improvement in the process of bating hides | |
DE803613C (en) | Method for tanning animal hide in the pit and means for practicing the method | |
Mohammed et al. | Improvement and Upgrading of Rural Tanneries | |
SU51373A1 (en) | Method of vegetable or combined tanning of leather with several tanning agents | |
SU46015A1 (en) | Combined tanning method | |
US680222A (en) | Tanning compound. |