Improvements in or relating to Apparatus for Moulding Bottles, Jars, and other Articles by Pressure.
Year: 1893

page_text: Date of Application, 13th July, 1893
Complete Specification Left, 15th May, 1894-Accepted, 16th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to Apparatus for Moulding Bottles,
Jars, and other Articles by Pressure.
I, WILLIAM PRIESSNITZ BONWICK, of 59 Blomfield Road, Maida Hill, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to
be as follows:-
This invention has reference to Improvements in or relating to Apparatus for
Moulding Bottles, Jars, and other Articles by Pressure.
According thereto I employ moulding apparatus of the kind in which there is
used in conjunction with top and bottom plates and a suitable clamping device or
devices, a mould plate arranged between the said top and bottom plates or between
a gate plate and the bottom plate, the wall of the mould, or of each mould when
there are several in the plate being so shaped as to correspond to the external form
of the bottle, or other article to be produced. In such moulding apparatus as
heretofore constructed, the mould plate rests upon the upper surface of the bottom
plate, or upon plates fixed thereto, so that the line of division between the sides and
bottom of the mould is in a horizontal plane. With this construction however,
should any small particles of glass be inadvertently left upon the bottom plate after
a moulding operation, they will prevent the mould plate fitting close down on the
bottom plate, with the result that when molten glass is next pressed into the mould,
some of it will escape through the imperfect joint and form on the lower end of the
bottle or other article an irregular sharp edge which spoils the appearance of the
article and is liable to cause injury to the person using the same unless it be
removed involving considerable additional cost.
Now an important object of this invention is to obviate this disadvantage. For
this purpose I provide the bottom plate with one or more extensions, or plugs
adapted, or each adapted, to fit into the lower end of the mould, or one of the
moulds, in the mould plate and form therewith a close joint, resembling a telescopic
or plug and socket joint, the arrangement being such that should any particles of
glass be left upon the bottom plate the only effect thereof will be to make the
mould slightly deeper but not to produce an opening for escape of molten glass or
other material and consequent formation of a sharp edge. The lower end of each
mould in the mould plate may be slightly enlarged or flared to facilitate the entry
of the corresponding plug which may be, if desired, so arranged as to be free to
adjust itself slightly in a lateral direction. The plug may be adapted to form the
bottom of the mould, or a part only thereof. In the latter case the remaining
portion of the bottom of the mould may advantageously be formed of a plate of
hard and tough metal such as steel or gun metal secured to the lower side of the
mould plate which can then be made of cast iron. The upper side of the mould
plate may when necessary be provided with a similar plate.
In moulding bottles, jars, tumblers, jugs, and other hollow or partly hollow
pressed articles that are of uniform or decreasing size internally from the lower
end or mouth to the top, 1 provide the plug or each plug when more than one is
used, with an upward extension, hereinafter called a core that projects to a suitable
distance into the corresponding mould in the mould plate and the external form of
which corresponds to the internal form of the article to be produced.
When the plug and socket joints hereinbefore referred to are made at the outer-
most edge of the article to be produced and such articles are plain externally such
as tumblers, or cniy ribbed or beaded at the end as in some forms of bottles, so
that the articles can leave the mould plate in an endways direction, the mould plate

page_text: When
can be made in one piece, or practically in one piece. In this case the moulds may
be fed through conical gates at the top of the mould plate, so that in the production
of articles like tumblers, projections will be left upon the top of the article, that
will facilitate their being picked up by a punty for subsequent treatment.
however the said joints are not made at the outermost edge of the article, or the
articles are to be formed with external projecting parts such as would prevent the
said articles leaving the mould plate in an endways direction, such mould plate is
divided in planes passing through the centre of the moulds so that after the
articles have been moulded under pressure and the mould plate removed from the
moulding apparatus, the parts thereof can be separated to permit of the articles
being easily removed from the moulds in a manner well understood.
When the mould plate is thus divided into strips, they are according to this
invention connected together at alternate ends by single or double hinges and are
provided with handles by which they can be lifted up and opened out so as to
allow the articles to drop out of the moulds formed between them. Suitably
arranged links serve to limit the opening apart of the mould strips. In another
construction of mould plate the mould strips are connected together by slotted
links and screws that serve to limit the moving apart of the strips and to each end
of one of the strips, preferably the central one, there is secured a slotted bar that
may advantageously be nearly as wide as the mould strips are deep and the slot in
which is arranged to receive the heads of the link screws and thus prevent them
from becoming loose as well as giving stiffness or rigidity to the whole plate.
For producing a number of articles of comparatively large size, such as plain
caps for wide mouth bottles, in a divided mould plate of comparatively small area
in plan I make the mould plate strips of greater depth than usual and form the
moulds horizontal therein so that the articles are moulded on edge instead of on
end as heretofore, the material of which the articles are made being fed through
gates formed in the mould plate adjacent to the line of division between each pair
of strips so as to permit of easy removal of the moulded article. The core for each
mould, when one is required, is carried by that face of the mould strip that is
adjacent to the mould.
Moulding apparatus of the kind described may be held together by the ordinary
frame to which is hinged a top plate or cap formed with a cup to receive material
such as molten glass or clay that is forced into the mould or moulds by a plunger
operated by a suitable press. The overplus may be removed by nicans of an
ordinary cutter, or by a separate gate plate according to the nature of the article
being moulded.
DL: 101
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.
COMPLETE SPECIFICATION.
Improvements in or relating to Apparatus for Moulding Bottles,
Jars, and other Articles by Pressure.
I, WILLIAM PRIESSNITZ BONWICK, of 59 Blomfield Road, Maida Hill, in the
County of Middlesex, Engineer, 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 :-
This invention has reference to Improvements in or relating to Apparatus for
Moulding Bottles, Jars and other Articles by Pressure.
According thereto I employ moulding apparatus of the kind in which there is
used in conjunction with top and bottom plates and a suitable clamping device or
devices, a mould plate arranged between the said top and bottom plates or between

page_text: a gate plate and the bottom plate, the wall of the mould, or of each mould when
there are several in the plate, being so shaped as to correspond to the external
form of the bottle or other article to be produced. In such moulding apparatus as
heretofore constructed, the mould plate rests upon the upper surface of the bottom
plate, or upon plates fixed thereto, so that the line of division between the sides and
bottom of the mould is in a horizontal plane. With. this construction however,
should any small particles of glass be inadvertently left upon the bottom plate after
a moulding operation, they will prevent the mould plate fitting close down on the
bottom plate, with the result that when molten glass is next pressed into the
mould, some of it will escape through the imperfect joint and form on the lower
end of the bottle or other article, an irregular sharp edge which spoils the
appearance of the article and is liable to cause injury to the person using the same
unless it be removed, involving considerable additional cost.
Now an important object of this invention is to obviate this disadvantage. For
this purpose I provide the bottom plate with one or more extensions, or plugs
adapted, or each adapted, to fit into the lower end of the mould, or one of the
moulds, in the mould plate and form therewith a close joint, resembling a telescopic
or plug and socket joint, the arrangement being such that should any particles of
glass be left upon the bottom plate the only effect thereof will be to make the
mould slightly deeper but not to produce an opening for escape of molten glass or
other material and consequent formation of a sharp edge.
In the accompanying drawings,
Fig. 1 is a vertical section of moulding apparatus embodying my invention.
1 and 2 are the top and bottom plates respectively, 3 a mould plate arranged
between them, and 4 a clamping device whereby the several parts are securely held
together, the said top plate forming in conjunction with the mould plate, which is
formed with conical gates or feeding apertures 5, a cup or receptacle 6 to receive
material such as molten glass or clay that is forced into the moulds 7 by a plunger 8
operated by a suitable press as well understood. 9, 9 are the extensions of the
bottom plate forming plugs each adapted according to this invention to fit into the
lower end of one of the moulds 7 and form therewith a close telescopic or plug and
socket joint for the purpose mentioned. The lower end of each mould 7, which
may be of any desired form corresponding to that of the article to be produced,
may be slightly enlarged or flared as shown to facilitate the entry of the corresponding
plug 9 which may, if desired, be so arranged as to be free to adjust itself slightly
in a lateral direction. For this latter purpose each plug is made separate from
the bottom plate and may be provided with a stem 9" with nut 9 as shown.
In moulding bottles, jars, tumblers, jugs, and other hollow or partly hollow
pressed articles that are of uniform or decreasing size internally from the lower end
or mouth to the top, I provide the plug or each plug when more than one is used,
with an upward extension, hereinafter called a core that projects to a suitable
distance into the corresponding mould in the mould plate and the external form of
which corresponds to the internal form of the article to be produced.
Fig. 2 is a side elevation, Fig 3 a plan and Fig 4 a cross section on the line A B
Fig. 3, showing moulding apparatus thus constructed and adapted for simultaneously
moulding a number of tumblers.
Fig. 5 is a similar view in Fig. 4 but shows the relative position of the mould
plate 3 and plug 9 in the event of particles of glass or other material getting
between the bottom and mould plates.
In this case, each of the plugs 9 is formed with an upward extension or core 9°
the external form of which corresponds with that of the interior of the tumbler to be
produced. When the plug and socket joints hereinbefore referred to are made at
the outermost edge of the article to be produced, and such articles are plain
externally, such as tumblers, or only ribbed or beaded at the end, as in some
forms of bottles, so that the articles can leave the mould plate 3 in an end ways
direction, the mould plate can be made in one piece, as in the construction of mould
plate shown in Figs. 1 to 5 inclusive, or practically in one piece. In this case the

page_text: moulds 7 may be fed through conical gates 5 at the top of the mould plate 3, so that
in the production of articles like tumblers 10, projections 10* will be left upon the
top of the article as shown in Fig. 6, which will facilitate their being picked up by
a punty for subsequent treatinent. These projections are afterwards knocked off,
as shown in Fig. 7, to form the finished article.
To enable the interior of the moulds to be easily polished and thus enable the
moulded articles to readily leave them, I prefer to form the upper or feeding end
of each mould of a separate piece 3* of metal such for example as cast iron, steel,
or gun metal, as shown in Figs. 3, 4 and 5. Each of these pieces 3ª may
conveniently be of disc form and be fixed by screws 3b in the top of the mould
plate 3 after the interior of the moulds therein have been finished. The top
plate 1 and mould plate 3 in each case are provided with suitable handles 1* 3*
The clamping
respectively to admit of the easy manipulation of these parts.
device 4 may conveniently consist of a ring or frame pivotted at 4" and detachably
connected to an eye 4b by a taper pin 4° as shown more clearly in Fig. 3.
.
When the aforesaid telescopic or plug and socket joints are not made at the
outermost edge of the articles, or the articles are to be formed with external
projecting parts which would prevent the said articles leaving the mould plate in
an endways direction, such mould plate is divided in planes passing through the
centre of the moulds so that after the articles have been moulded under
the mould plate removed from the moulding apparatus, the parts thereof can be
separated to permit of the articles being easily removed from the moulds.
pressure
and
Fig. 8 is a vertical section of moulding apparatus in which the mould plate 3 is
thus divided, the lines of division being shown at 11. In this case a removable
gate plate 12 is shown above the mould plate, the gates 12ª in this plate and
those 5 in the mould plate 3 being of inverted conical form so that the narrow part
of each gate will be next the moulded article so that when the gate plate is removed,
the gates will be broken off close to the articles. The mould and gate plates are
shown held in place on the bottom plate 2 by a hinged top plate or cap 1, which,
like the top plates in the other constructions hereinbefore described, is formed as a
cup to receive the material to be forced into the moulds by the plunger. When a
separate gate plate is not employed, the overplus may be removed from the top of
the mould plate by means of an ordinary cutter as well understood.
When the mould plate is thus divided into strips, the said strips, may, according
to this invention, be connected together at alternate ends by hinges 13 as shown in
Figs. 9 and 10, which are respectively a side elevation and plan of the divided
mould plate 3, which, by means of its handles 3*, can be lifted up and opened out
formed
as shown in Fig. 10 so as to allow the articles to drop out of the moulds
between them. Links 14 encircling screws 15 fixed to the ends of the strips
opposite to the hinges, serve to limit the opening apart of the mould strips. The
mould strips may however be arranged to be moved in a direction parallel to each
other on rods traversing them, slotted links and screws such as described being
employed to limit the moving apart as well understood.
Each of the plugs 9 herein before described may be adapted to form the bottom
of the mould as in the examples shown in Figs. 1, and 4, or a part only thereof, as
shown in Fig 8. In the latter case the remaining portion of the bottom of the
mould may advantageously be formed of a plate 3 of hard and tough metal such
as steel or gun metal secured to the lower side of the divided mould plate 3 which
can then be made of cast iron. The upper side of the mould plate may, if desired,
be provided with a similar plate 3d forming the top wall of the moulds, also as
shown in Fig. 8.
For producing a number of articles of comparatively large size, such as plain
caps for wide mouth bottles, in a divided mould plate of comparatively small area
in plan, I make the mould plate strips of considerable depth and so form the moulds
therein that the articles will be moulded on edge instead of on end as heretofore,
the material of which the articles are made being fed through gates formed in the
mould plate at the line of division between each pair of strips so as to permit of

page_text: easy removal of the moulded article. The core for each mould, when a core is.
required, is carried by that face of the mould strip that is adjacent to the mould.
Fig. 11 is a vertical section of moulding apparatus thus constructed.
Fig. 12 is a plan; and
Fig. 13 a side elevation of the divided mould plate used therein.
7 are the moulds formed in the right hand side of the metal strips composing the
mould plate excepting the extreme strip to the right, and 9 are plugs with cores 9.
formed on the left hand sides of the said strips, except the extreme strip to the left,
these plugs and cores entering the open ends of the moulds like the plugs and cores
in the herein previously described arrangements so as to prevent escape of the
glass or other material from the moulds in the event of the mould strips being..
pressed slightly apart by the pressure of the said material. The said plugs form in
conjunction with the opposite mould strips mould spaces which are of slightly
conical or taper shape in order to facilitate the removal of the moulded articles..
5 are the feeding gates each formed between adjacent pairs of the mould strips so
as to admit of the ready release of the moulded articles. The mould strips are
connected together by slotted links 14 and screws 15 that serve to limit the moving.
apart of the strips, and to the screws on each end of one of the strips, preferably
that nearest the centre of the mould plate, there is secured by nuts 16 a plate 17
that may advantageously be nearly as wide as the mould strips are deep and which
is formed with slots to receive the heads of the screws as shown in Fig. 13 and
thus prevent the screws from becoming loose as well as giving stiffness or rigidity
to the whole plate.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. Apparatus for moulding bottles, jars and other articles by pressure in which
the bottom plate, or that opposite the mouth of the mould, is provided with one or
more extensions or plugs adapted, or each adapted, to fit into the lower end or
mouth of the mould, or one of the moulds, in the mould plate and form therewith a
close joint resembling a telescopic or plug and socket joint substantially as herein.
described for the purpose specified, whether or not the said extension or plug, or
each of them when several are used, be provided with an extension or core as set.
forth.
2. Moulding apparatus of the kind referred to in the preceding claim in which
the top of the mould, or of each mould, is made of a separate perforated plate fixed
to the top of the mould plate substantially as hereinbefore described with reference.
to and shown in Figs. 3, 4 and 5 of the drawings annexed.
3. My improved moulding apparatus constructed substantially as hereinbefore
described with reference to and shown in Fig. 1, in Figs. 2, 3, and 4 and in Fig. 8.
of the drawings annexed.
4. My improved divided mould plate constructed of a number of strips connected
together at alternate ends by hinges and provided with links and pins or screws for
limiting the opening part of the said strips substancially as hereinbefore described
with reference to and shown in Figs. 9 and 10 of the accompanying drawings.
5. Moulding apparatus in which the moulds and gates are so formed in and
between the mould plate strips that articles can be moulded on edge, instead of on
end substantially as hereinbefore described with reference to and shown in:
Figs. 11, 12 and 13 of the drawings annexed.
1
CM 1004