An Improvement in Machine Made Glass Bottles or Jars and in Apparatus for Manufacturing them.
Year: 1898

page_text: Date of Application, 22nd Apr., 1898-Accepted, 28th May, 1898
COMPLETE SPECIFICATION.
An Improvement in Machine Made Glass Bottles or Jars and in
Apparatus for Manufacturing them.
I, WILLIAM BAGLEY, of The Chestnuts, Ferrybridge, in the County of York,
Glass Bottle 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 :-
In several Specifications and particularly in No. 11288 of 1889 is described
apparatus for manufacturing glass bottles operating in a manner which may be
briefly stated as follows:-
Molten glass is poured into what is termed a "Parison" mould, through the
bottom of which a plunger is thrust up forming a cavity in the body of glass.
The mould is then inverted and being made in halves is withdrawn leaving the
glass suspended by an undercut ring which formed part of the Parison mould but
is not withdrawn with it. The glass after being "paddled," as it is termed, by
several reciprocations of a bottom piece, is then enclosed in a finishing mould inade
in halves, and compressed air being admitted to the cavity in the glass the bottle
is blown to the finished form, whereupon the mould is withdrawn and then the
undercut ring, which is also made in halves, the bottle being thus left free for
removal. As the undercut ring, as well as the moulds, is made in halves there is
generally left at each side of the mouth of the bottle a slight fin or projection
corresponding to the partings of the halves of the ring. When a bottle or jar
moulded in this way is intended to be closed by a cover held down upon a packing
washer by atmospheric pressure there being a partial vacuum within, the presence
of these fins however small their projection, is apt to allow leakage of air under
the washer, the effect of which is that the pressure within the vessel gradually
attains that without, and the cover is no longer held down.
As the moulding apparatus is more and more used the projecting fins become
more and more prominent and therefore more objectionable.
My invention relates to a modification of the mouth of the bottle or jar and of
the mould for making it whereby I overcome this objection as I shall describe
referring to the accompanying drawings.
Fig. is an elevation of the upper part of a machine moulded jar modified
according to my invention.
Fig. 2 is a section shewing part of the jar in the finishing mould the suspending
ring and the inverted base of the parison mould.
As seen in Fig. 1 besides the bead B which usually terminates the upper part of
a machine made bottle or jar, I make an upwardly projecting lip L intended to
receive the packing washer of caoutchouc or like material, which folds partly over
the lip.
This lip is made without any projecting fin as will be understood with reference
to Fig. 2.
The part A which when inverted forms the part of the parison mould and on
which the ring R (which is made in halves) is clamped, instead of terminating, as
in the machines hitherto employed, with a flat face on the plane F', is, according to
my invention, made with a groove corresponding in form to the lip L, and thus
when the glass is poured into the parison mould, the parts A and R being then
Do31

page_text: inverted, the lip L is moulded in the part A which is not made in halves as the
ring R and mould M are, and consequently the lip L which is moulded in the groove
has no projecting fins, such as appear on the head and the side of the bottle or
jar.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what I
claim is:
1. A machine made bottle or jar for receiving a cover secured by atmospheric
pressure, made with a projecting lip without fins, substantially as described.
2. For making by machine a bottle or jar with finless lip, the formation of a
groove in the base of the parison mould, substantially as described.
00
+1 1000