IMPROVEMENTS IN THE TREATMENT OF LEATHER TO RENDER IT WATERPROOF
Year: 1884

page_text: We JOHN COVE of Northampton Shoe Manufacturer and WILLIAM PETER
SHERWOOD of 63 Mare Fair Northampton Dentist do hereby declare the nature
of our Invention for "IMPROVEMENTS IN THE TREATMENT OF LEATHER TO
RENDER IT WATERPROOF," to be as follows:-
This Invention has for its object improvements in the treatment of leather to
render it waterproof.
For this purpose we take leather or it might be leather cloth commonly called
composition made up to a great extent of leather shavings in a perfectly dry state
and immerse it in a bath compounded of melted paraffin and vaseline--the amount
of vaseline added to the paraffin will depend upon the degree of hardness required
in the leather. If a hard leather be required a comparatively small proportion of
vaseline would be used but for flexible leathers the proportion would be increased.
Usually we employ the vaseline in the proportion of about one part of vaseline to
3 or 4 of paraffin.
The leather should be left in the bath of melted material until bubbles cease to
arise from it.
The leather when taken from the bath should be wiped clean and when cold is
ready for use or previously to allowing it to cool it might be subjected to pressure
if desired.
It will be found that leather treated in the above manner is perfectly water-
proof and that the waterproofing is not only effected upon its surface but also
throughout the whole of its substance.
Dated this 30th day of June 1881.
CARPMAEL & Co.,
Agents for the Applicants.

page_text: We JOHN COVE of Northampton Shoe Manufacturer and WILLIAM PETER
SHERWOOD of 63 Mare Fair, Northampton, Dentist do hereby declare the nature
of our Invention · for "IMPROVEMENTS IN THE TREATMENT OF LEATHER TO
RENDER IT WATERPROOF" and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement:―
This Invention has for its object improvements in the treatment of leather to
render it waterproof.
For this purpose we take leather, or it might be leather board commonly called
"composition "made up to a great extent of leather shavings in a perfectly dry
state and immerse it in a bath compounded of melted paraffin and vaseline the
amount of vaseline added to the paraffin will depend upon the degree of hardness
required in the leather. If a hard leather be required a comparatively small
proportion of vaseline, would be used but for flexible leathers the proportion would
be increased. Usually we employ the vaseline in the proportion of about 1 part.
of vaseline to 3 or 4 of paraffin.
The leather should be left in the bath of melted material until bubbles cease to
arise from it.
The leather when taken from the bath should be wiped clean and when cold is
ready for use or previously to allowing it to cool it might be subject to pressure if
desired.
It will be found that leather treated in the above manner is perfectly water-
proof and that the waterproofing is not only affected upon its surface but also
throughout the whole of its substance.
The following is the manner in which we prefer to conduct the operation.
We store the leather to be treated for some time previously in a dry warm
chamber until it ceases to loose weight by the evaporation of moisture.
We then prepare the bath of vaseline and paraffin and heat it to a temperature
of 113° Fahrenheit.
We immerse the leather in this bath and retain it there for some time till bubbles
cease to rise.
On the removal of the leather from the bath as much of the composition is
removed from its face as can be taken off by wiping with a cloth and the operation
is complete.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed we declare that what
we claim is:-
The treatment of leather with a composition consisting of vaseline and paraffin
thereby rendering the same waterproof as heroin described...
D
L 100
CARPMAEL & Co.,
Agents for the Applicants.