Improved Means for Restoring the Surface of." Raised" Articles of Tinplate.
Year: 1886

page_text: Date of Application, 4th Oct., 1886.
Complete Left, 2nd July, 1887.
Complete Accepted, 12th Aug., 1887.
PROVISIONAL SPECIFICATION.
Improved Means for Restoring the Surface of." Raised" Articles
of Tinplate.
I, ALFRED NIND HOPKINS, of the firm of J. H. Hopkins and Sons, of Granville
Works, Granville Street, Birmingham in the County of Warwick, tinplate workers
and japanners, do hereby declare the nature of this invention to be as follows:-
66
"
In making "raised "articles of tinplate the surface of the tin coating becomes
abraded or injured and rendered dull by the operation of the tools employed in
raising the tinplate; and the surface is restored, according to the usual method
employed, by re-dipping the "raised "articles in a bath of molten tin. This process
of restoring the surface of the coating metal is however expensive, and the object of
this invention is to restore the abraded or injured surface of the tin without re-dipping
in molten metal.
According to this invention, the evenness and brightness of the tin coating are in a
large measure restored, by dipping the "raised "articles in a bath of cocoa nut oil,
Russian tallow, or other suitable grease, raised to a high temperature. The hot
grease appears to act upon the tin coating by causing a partial fusion of the metal
and thus making it run again into an even and bright surface.
The surface is afterwards cleaned from grease and further brightened by rubbing
with sharps, in the manner ordinarily employed after re-dipping.
Cond day of October 1886

page_text: COMPLETE SPECIFICATION.
Improved Means for Restoring the Surface of "Raised" Articles
of Tinplate.
I, ALFRED NIND HOPKINS, of the firm of J. H. Hopkins and Sons, of Granville
Works, Granville Street, Birmingham in the County of Warwick, tinplate workers
and japanners, 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 :-
In making "raised "articles of tinplate the surface of the tin coating becomes
abraded or injured and rendered dull by the operation of the tools employed in
raising" the tin plate; and the surface is restored, according to the usual method
employed, by re-dipping the "raised" articles in a bath of molten tin. This process
of restoring the surface of the coating metal is however expensive, and the object of
this invention is to restore the abraded or injured surface of the tin coating without
redipping in molten tin.
According to this invention the abraded or injured surface of the tin coating is
restored by dipping the "raised" articles in a bath of suitable oil or grease, such as
cocoa nut oil, tallow, or palm oil, raised to a high temperature, that is, preferably, to
as high a temperature as may be perfectly safe in view of the liability of the oil or
grease to fire, as will be readily understood.
According to my present experience I find that cocoa nut oil is the most suitable
material to employ for the purpose of this invention.
The heated oil or grease appears to act upon the tin coating by causing a partial
fusion of the metal and thus making it run again into an even and bright surface.
The surface is afterwards cleaned from grease, and further brightened, by rubbing
with sharps in the manner ordinarily employed after re-dipping, or any convenient
known or obvious method may, of course, be adopted for cleaning the surface or for
cleaning and further brightening it.
:-
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim, is :-
1. The improved means herein described for restoring the surface of ".
articles of tinplate.
"
raised
"
2. Restoring the surface of "raised articles of tinplate by dipping such articles in
a bath of suitable oil or grease, such as cocoa nut oil, tallow, or palm oil, raised to a
high temperature, substantially as described.
Dated this First day of Tule. 1007