Year: 1885

page_text: I, JAMES YATE JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of this Invention which has been com-
municated to me from abroad by Gustave Bouvier of 38 rue de Babylone Paris
in the Republic of France to be as follows:-
This Invention relating to the manufacture of Cartridge Cases consists in
making these articles of non-metallic materials in one piece as hereinafter
explained.
-
Any suitable non metallic materials such as paper pulp for example may be
employed in the manufacture of the improved Cartridge cases.
The paper or other pulp is preferably employed in a sufficiently liquid condition
to admit of spreading it upon a suitable surface such as a wire cloth after which it
is partially dried and rolled into the form of a solid cylinder or plug which is
introduced into a cylindrical case provided at one end with a cylindrical former
terminating in a cone and pin and at the other with a piston By pushing the
piston into the case the plug of pulp is compressed and forced over the cone and
pin which are then withdrawn from the case together with the plug of pulp and
rolled upon a layer of pulp in such a manner as to form a blank case the base of
which is formed by the plug herein before described. The pulp is partially dried
again serving to maintain the plug on the end of the former and to provide for the
admission of air when the blank is taken off the former. The blank case is then
subjected to pressure between a ram or core and a steel mould constructed in
sections and operating in such a manner that the pressure is exerted uniformly and
simultaneously upon the sides of the case whilst a piston compresses the base. The
object of this duplex compressing is to impart cohesion and homogeneity to the
blank which is reduced to the correct size at the same time.
The non metallic cartridge case is then thoroughly dried and after being
subjected to the ordinary stamping processes which form the base and the flange
is waterproofed by any suitable means such as immersion in a bath of collodion for
example.
.
AL

page_text: Improvements in the Manufacture of Cartridge Cases.
I, JAMES YATE JOHNSON, of 47 Lincolns Inn Fields, in the County of Middlesex,
Gentleman, do hereby declare the nature of this Invention which has been com-
municated to me from abroad by Gustave Bouvier of 38 rue de Babylone Paris
in the Republic of France and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
This Invention relating to the manufacture of Cartridge Cases consists in
making these articles of non-metallic materials in one piece by moulding and
shaping the materials while in a plastic or semi-fluid condition so as to cause them
to acquire the required form as hereinafter explained Any suitable non-metallio
materials such as paper pulp for example may be employed in the manufacture of
the improved Cartridge Cases and the process of making them may be carried out
by any known or suitable apparatus such.for example as that hereinafter described.
And in order that this Invention may be fully understood I shall now proceed
more particularly to describe the same and for that purpose shall refer to the
several figures on the annexed sheet of drawings the same letters of reference
indicating corresponding parts in all the figures.
>
Figure 1 of the accompanying drawings represents partly in section an apparatus
which may be used for preparing the base of the Cartridge and Figures 2 and 3
represent in transverse and longitudinal section respectively an apparatus for
shaping and compressing the cylindrical portion.
In making Cartridge Cases according to this Invention when paper pulp is
employed for example the pulp is employed in a plastic or sufficiently liquid
condition to admit of spreading it upon a wire cloth or other surface of suitable
dimensions corresponding to the dimensions of the Cartridge Case to be ultimately
produced. The pulp is then partially dried and when it has attained a proper
consistency is rolled into the form of a solid cylinder or plug A figure 1 which is
introduced into a cylindrical case C.
At one extremity of this case there is provided a former m provided with a
pint and the other extremity contains a piston p. By pushing this piston into the
case C the plug A of pulp is compressed and forced over the pin t. The former m
and the pin t together with the pulp forming the base of the Cartridge Case are
then withdrawn from the case C and rolled upon a layer of pulp prepared by
spreading it on a suitable surface in order to form the sides of a blank or unfinished
case the base of which is formed by the plug herein before described The pulp is
now partially dried again either by exposure to the air or by artificial beat the
pint serving to maintain the plug on the end of the former m and to provide for
the admission of air when the blank is taken off the said former. The materials
set or solidify in one homogeneous or solid mass and when sufficiently dried the
blank is introduced into the apparatus illustrated in Figures 2 and 3 composed
of a steel sheath or elastic mould 8 open or divided along one side as at 81 so
as to be capable of expansion and contraction and provided with a mandrel or
core m¹ The blank case being removed from the former m is placed in the
moulds and subjected to pressure between the core mi and the sides of the elastic
י

page_text: steel moulds by means of radial sections or compressing devices a b c sliding
radially or similarly to the jaws of a universal chuck in such a manner that
pressure is exerted uniformly and simultaneously upon the slides of the blank
whilst a piston o compresses the base of the blank or case at the same time and
reduces its thickness by about one half. The object of this duplex or compound
compressing action is to impart cohesion and homogeneity to the blank which is
reduced to the correct size or diameter at the same time.
The non metallic cartridge caso thus produced is then thoroughly dried after-
wards subjected to the ordinary stamping processes which impart the proper form
to the base and the flange of the finished case. The case is waterproofed by any
suitable means such as immersion in a bath of collodion for example,
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what
I claim is-
1. As a new product of manufacture a Cartridge Case made in one piece of paper
pulp or other non metallic materials substantially as hereinbefore described.
2. As a new product of manufacture a non metallic cartridge case prepared by
moulding and compressing paper pulp or the like in apparatus constructed and
operating substantially as herein before described with reference to the accom-
panying drawings.