Improvements in Materials and Moulds or Machinery for the Manu- facture of Cases for the Contents of Projectiles, and for other purposes.
Year: 1890

page_text: Date of Application, 27th Mar., 1890
Complete Specification Left, 27th Dec., 1890-Accepted, 31st Jan.,
1891
PROVISIONAL SPECIFICATION.
Improvements in Materials and Moulds or Machinery for the Manu-
facture of Cases for the Contents of Projectiles, and for other
purposes.
We RICHARD HENRY BRUNTON and HERBERT BREWSTER both of 21,
Wellington Street, Strand, in the County of London, Papier Maché Manufac-
turers, do hereby declare the nature of this invention to be as follows:-
The object of our invention is to manufacture cases from papier maché materials
such as that hereafter described suitable for containing explosives for the interior
of projectiles, or shot or lead powder now used for testing the mountings of
ordnance and for other purposes such as for the cells of secondary batteries, or
canister receptacles for use in laboratories or manufactories.
According to our invention the material which we employ is composed of paper
scraps, glue, boiled oil and a proportion of earthy matter preferably whiting.
We proceed in the following manner.
The brown paper scrap is boiled in a copper for 2 hours, and then torn up into
small pieces, the water being squeezed out of same and subsequently ground up in
a mixing machine to a coarse powder. We then take one half the weight of the
paper so treated, of glue of the best quality which is dissolved in half its weight of
water, and a quantity of boiled oil varying from th to th of the dissolved glue is
added to the solution.
The ground up paper is then added to the dissolved glue and oil, and thoroughly
mixed.
The mixture is then ground up in a mixing machine and about one third of its
After this has
weight of earthy matter is thoroughly incorporated with the mass.
been accomplished the material is rolled out by passing through circular rollers to
the thickness of sheet necessary. The sheet is then cut up into the sizes required
and placed in moulds as hereafter described for pressing.
The mould consists of a top and bottom portion which, when together form the
outside of the case or other article to be made.
There is a spindle through the longitudinal axis of the mould and such spindle
may be conveniently made of steel, which rests in grooves made for it half in the
top and half in the bottom portions of the mould having a collar at one end which
keeps it precisely in its correct position longitudinally. On this spindle is placed a
core made to the form of the interior of the case or article to be made. This core
when placed in position leaves all round it a space corresponding with the thickness
of the material of the case to be made.
The sheets of material produced in the manner before described having been
rolled and cut to proper sizes as before described are placed round the interior of
the bottom portion of the mould, the core is then placed in position and the material
is brought round the top half of the core. The top portion of the mould is then
placed on and the whole pressed by hydraulic means until the two halves of the
moulds come close home to each other.
After another pressing the stuff oozing out at the joints between the moulds is
trimmed off and the case is placed to dry on a cradle which will prevent its going
out of shape until sufficiently hard.
Tops and bottoms for the cases when required are made by the same methods and
secured in place by wooden pins and glue.

page_text: When thoroughly hard and dry the cases may be either turned in a lathe to
a smooth surface to the exact size required or otherwise finished as may be directed.
Dated this 27th day of March 1890.
R. HENRY BRUNTON.
HERBERT BREWSTER.
By Brewer & Son,
33, Chancery Lane, London, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Materials and Moulds or Machinery for the Manu-
facture of Cases for the Contents of Projectiles, and for other
purposes.
We RICHARD HENRY BRUNTON and HERBERT BREWSTER both of 21
Wellington Street Strand in the County of London, Papier Maché Manufacturers
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 our invention is to manufacture cases from paper materials such
as those hereafter described suitable for containing explosives for the interior of
projectiles or shot or lead powder so forming shot now used for testing ordnance,
and for other purposes such as for the cells of secondary batteries, or canister
receptacles for use in laboratories or manufactories.
According to our invention the material which we employ is composed of paper
scraps or straw pulp from paper manufactories, glue, boiled oil, rosin and a
preparation of earthy matter preferably whiting.
We proceed in the following manner.
In a
The brown paper scrap is boiled in a copper for two hours and then torn up into
small pieces the water being squeezed out of same and subsequently ground up in a
mixing machine to a coarse powder, or the straw pulp is used as it comes from paper
mills. We then take one half the weight of the paper so treated (or the pulp) of
glue of an ordinary quality which is dissolved in half its weight of water.
quantity of boiled oil varying from th to th the weight of the dissolved glue is
dissolved, the same weight of dark rosin as of glue, and the two solutions are mixed
together. The ground up paper, or pulp, is then added to the dissolved glue rosin
and oil, and thoroughly mixed. The mixture is then ground up in a mixing
machine and about one half of its weight of earthy matter is thoroughly incorporated
with the mass. After this has been accomplished the material is rolled out by
passing through circular rollers to the thickness of sheet necessary.
The sheet is
then cut up into the sizes required and placed in moulds for pressing as hereafter
described with reference to the accompanying drawings.
Figure 1 is a longitudinal vertical section through the line BC of Figure 2 which
latter is a cross section through the line A B of Figure 1 of such moulds or dies
constructed according to our invention.
Figure 3 is a plan of the lower mould with the top mould removed showing the
core in position, and
Figure 4 is an end view of the bottom portion with the core in position.
The mould consists of a top A and bottom portion B which when together form
the outside of the case or other article to be made. There is a spindle C through
the longitudinal axis of the mould and such spindle may be conveniently made of
steel, which rests in grooves E made for it half in the top and half in the bottom
portions of the mould having a collar F at one end which keeps it precisely in its
correct position longitudinally. On this spindle C is placed a core D made to the
form of the interior of the case or article to be made. This core D when placed-
in position leaves all round it a space marked G corresponding with the thickness
of the material of the case to be made.

page_text: The sheets of material, produced in the manner before described, having been
rolled and cut to proper sizes are placed round the interior of the bottom portion B
of the mould, the core D is then placed in position and the material is brought
round the top half of the core. The top portion A of the mould is then placed
on and the whole pressed by hydraulic means until the two halves A and B of the
moulds come close home to each other.
After another pressing the stuff oozing out at the joints H between the moulds
is trimmed off and the case is placed to dry on a cradle which will prevent its going
out of shape until sufficiently hard.
Tops and bottoms for the cases when required are made by the same methods
and secured in place by wooden pins and glue.
When thoroughly hard and dry the cases may be either turned in a lathe to a
smooth surface to the exact size required, or otherwise finished as may be directed.
They are also japanned to protect them from the action of the weather.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
First The manufacture of cases for containing explosives or shot or lead powder
for projectiles, the cells of secondary batteries, canister receptacles and for other
purposes from paper scraps, or straw pulp, treated as described and subsequently
mixed with glue, boiled oil, rosin and earthy matter in or about the proportions
named and ground and incorporated with earthy matter and finally rolled into sheets
all substantially as hereinbefore described.
:
Second In the manufacture of such cases as those claimed under claim 1, the
employment of moulds composed of top and bottom portions A B, spindle C, core D
constructed arranged and acting substantially as hereinbefore described and
illustrated with reference to the accompanying drawings.
Third The manufacture of cases in and by the employment. of materials and
compositions mixed and combined in or about the proportions named, in combina-
tion with moulds constructed arranged and acting substantially as hereinbefore
described and illustrated with reference to the accompanying drawings.
Fourth: The cases for holding the contents of test projectiles and for other
purposes such as for the cells of secondary batteries or canister receptacles for use
in laboratories or manufactories, composed of materials and constructed substantially
as set forth.
R. H. BRUNTON.
H. BREWSTER.
By Brewer & Son,
33, Chancery Lane, London, Agents.