An Improved Method of and Process for Annealing Metal Plates and Sheets.
Year: 1889

page_text: Date of Application, 17th Dec., 1889
Complete Specification Left, 17th Oct., 1890-Accepted, 22nd Nov., 1890
PROVISIONAL SPECIFICATION.
An Improved Method of and Process for Annealing Metal Plates
and Sheets.
I ADOLF GUTENSOHN of the Globe Works Old Ford in the County of Middlesex
Manufacturer do hereby declare the nature of this invention to be as follows:-—
The object of my invention is to provide a method of and process for annealing
metal plates and sheets by the use of which a great economy will be effected in the
consumption of the necessary fuel and the desired annealing will be completed in a
much shorter time than is at present required whereby also amongst other advantages
more fuel will be saved.
To carry out this object I take the plates or sheets when they have been duly rolled
and cut or otherwise so treated as to be ready for annealing and I immerse these plates
in a bath of a very hot preferably nearly boiling solution of such material as is capable
of chemical combination with the plate on the surface thereof. For example with iron
plates any of the alkalies will serve for this purpose especially sulphate of soda and
I preferably use this solution in as concentratod a form as is possible. The plates are
plunged into this bath and when taken thereout are placed in a suitable receptacle
which can be tightly closed and therein are subjected in any convenient furnace or
otherwise for a short time to such an heat as will produce in them a red heat and are
then caused or allowed to cool. This process when desired may be repeated after the
plates have been brushed or rolled or otherwise treated or the second annealing if any
may be perforined in the usual manner without the previous immersion in the bath.
The plates thus annealed are then ready for their further treatment as may be
desired.
Dated this 17th day of December 1889.
COMPLETE SPECIFICATION.
An Improved Method of and Process for Annealing Metal Plates
and Sheets.
I ADOLF GUTENSOHN of the Globe Works Old Ford in the County of Middlesex
Manufacturer 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 :—
The object of this my invention is to provide a method of and process for annealing
metal plates and sheets by the use of which a great economy will be effected in the
consumption of the necessary fuel and the desired annealing will be completed in a
much shorter time than is at the present ordinarily required whereby also amongst
other manifold and manifest advantages more fuel will be saved.
To carry out this object and to anneal the required iron plates and sheets for the
which metal this invention has been chiefly if not solely designed and to the which
metal this method and process is chiefly if not solely applicable I take these plates and
sheets when they have been duly rolled and cut or have otherwise been so treated in
any usual manner as to be ready for the annealing and I proceed to deal with the same
in the following manner.
I make a solution of the sulphate of one of the alkalies or alkaline earths such for
example as soda potassa ammonia lime baryta alumina or magnesia and I make this
solution as strong or in as concentrated a form as is possible or practicable or con-
venient and I then heat this solution to or about the boiling point and there or
thereabouts I maintain the same when it will be capable of the desired chemical

page_text: combination with the surfaces of the plates or sheets. In this bath so heated I
immerse the plates or sheets in any convenient manner and by or through any usual
or suitable appliances and I retain the same therein until they have attained the
temperature of the bath or thereabouts which as a general rule will be in about five or
it may be even ten minutes when they are removed therefrom.
The plates or sheets so treated as aforesaid can then be subjected to the usual and
ordinary annealing process or that is to say they can be placed in any suitable
receptacle which can be and is tightly closed and therein they are subjected in any
convenient furnace or otherwise to such a temperature as will produce in these plates
or sheets a red heat and when this red heat has been fully and properly attained the
receptacle is withdrawn from the influence of the heat or partially so and the plates
or sheets therein are allowed gradually to cool down and preferably as slowly as is
possible care being taken that the receptacle is closed quite tightly and that no fresh
air is allowed access to the plates or sheets therein.
When the plates or sheets are cool the receptacle can be opened and the plates or
sheets can be taken thereout and on exposure to the air the scale or lamina or lamella
that has been formed or produced or that is on the surfaces thereof will speedily soften
and can be allowed to drop off of itself or by its own accord but to quicken this
latter operation I preferably swill the plates or sheets in water or in extremely diluted
acid or ile like and the plates or sheets can also be brushed or otherwise treated in any
usual and convenient manner to remove all and all traces of this scale or lamina or
lumella.
The plates or sheets can then if desired be cold rolled and are ready for their
further treatment in any usual or other manner as may be required.
Whenever it may be desirable or necessary or convenient so to do the plates or
sheets can after the cold rolling aforesaid or on other occasions be treated and annealed
a second time in the manner herein before described or the simple and usual procoss
of annealing may only be used on this occasion and so on as often as may be.
requisite.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. In the annealing of metal plates and sheets the use of an hot solution of the
sulphate of an alkali or alkaline earth substantially as hereinbefore described and
set forth.
2. The method of and process for annealing metal plates and sheets substantially as
herein before described and set forth.
D
1000