A Process for the Manufacture of a Sealing Material for Rendering Sheet Metal Joints Tight, particularly applicable for Sheet Metal Cans and the like, for the Storage and Transport of Solid or Liquid Substances Containing Oil, and for like purposes.
Year: 1899

page_text: Date of Application, 28th Aug., 1899-Accepted, 3rd Feb., 1900
COME LEIE DIFCIFICATION.
A Process for the Manufacture of a Sealing Material for Rendering
Sheet Metal Joints Tight, particularly applicable for Sheet Metal
Cans and the like, for the Storage and Transport of Solid or Liquid
Substances Containing Oil, and for like purposes.
We, WALTER RUTTENBERG, of 116, Veststraat, and MATTHYS VAN ZANTEN, of
73, Wynstraat, both of Dordrecht, in the Kingdom of the Netherlands, Manu-
facturers, do hereby declare the nature of this invention and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement:-
It has been tried without success to substitute for the tin solder, used for
soldering sheet metal goods, particularly cans and the like for storing and trans-
porting preserved and other substances, a soldering or sealing substance, which
shall be of the same technical value in the art and more easily manufactured
and applied.
In several countries, particular in Germany, the application of the legally
prescribed solder, containing 90 per cent. of tiu, for cans for preserved and other
goods is difficult, the solder not being easily fused; and its use is expensive,
particularly for large cans or vessels to hold petroleum and other mineral or
vegetable oils, naphtha, benzine, turpentine, linseed oil, rape seed oil, lubri
cants and the like. The use of cans thus soldered has been found indispensable
hitherto, particularly for oversea transport in large quantities. The cost of such
soldered cans is great not only through the use of the expensive tin solder, but
also by the necessary soldering tools, fuel, time and wages.
This invention is designed to solder or seal such cans and the like with greater
ease and less cost. The substance used consists of a mixture of animal and
vegetable adhesive substances, and carbon hydrates is mixed and heated with an
addition of chloride of calcium; or other metallic salt to act as a precipitant
which sealing composition though not so hard as tin solder has sufficient firm-
ness to seal the vessels effectively. The substance is introduced into a groove
of the sheet metal as in the case of tin solder and a bead is then formed of the
sheet metal, also as in the case when tin solder is used.
The materials used to form this sealing substance are animal and vegetable
glues, gelatine, starch, dextrine, glucose and the like. A mixture of these adhe-
sive substances is first dissolved in water and a small quantity of chloride of
calcium is then added. The peculiarities of the mixture and the addition of
chloride of calcium prevent the substance drying up like glue; and it appears
that particularly the reaction started by the chloride of calcium renders the sub-
stance permanently plastic but firm and impermeable. The adhesive and gum-
like properties are increased by an addition of carbo hydrates, preferably in the
form of sugar, either cane or starch sugar. The whole process is carried out
under the application of heat. After cooling, the substance is dense, tough and
elastic and has the appearance and elasticity of soft sticky india rubber. Experi-
ments with this mixture have been made for years and the following method
has been found especially suitable:-40 parts of glucose are intimately mixed

page_text: with 30 parts of joiners glue and 30 parts of water, the glue having been pre-
viously digested with water at a temperature of from 80° to 100° C. To the
mixture is then added chloride of calcium in the proportion of from 10% to 1%.
The sealing substance thus produced suffices for all requirements for the
purpose, and is not affected or dissolved by oils and like substances, which act
through their acids on metals and gums; the substance thus has properties
quite different from sealing wax, gum and the like. The substance becomes
firm, but not brittle and has exactly the elasticity desirable for a sealing sub-
stance intended to unite metals. A sweet taste which it obtains from the carbo
hydrates is neutralised by a bitter substance such as assafoetida.
The materials stored and transported in cans thus sealed, for instance petro-
leum and vegetable oils, have not the least effect on the permanent durability
of this sealing substance, which remains perfectly neutral to the most various
products, which has been proved by many trials. The substance is soluble in
water and watery solutions; it is introduced into the groove formed by the
sheet metal by flat devices like rules, or by dipping the article to be sealed into
the fluid substance; the filled grooves being then beaded if desired.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what
we claim is :-
1st. A process for the manufacture of a non-metallic sealing substance, con-
sisting of a mixture of vegetable and animal glues or adhesive materials and
carbo hydrates mixed with a precipitating agent, such as chloride of calcium,
or another metallic salt, substantially as described.
2nd. In the process claimed in Claim 1 glucose joiners glue and water in
about equal parts, digested while hot and mixed with chloride of calcium in the
proportion of from th% to 1%, substantially as described.
3rd. In the process claimed in Claim 1 the addition of bitter substances, such
as assafoetida having a neutralizing effect on the carbo-hydrates of the sealing
substance, substantially as described.
DLL
Anment 1900