Improvements in the Production of an Air Tight Easily Opened. Closing Device for Vessels of Glass, Porcelain, Stone-ware, or Earthenware.
Year: 1898

page_text: Date of Application, 9th Feb., 1898-Accepted, 26th Mar., 1898
COMPLETE SPECIFICATION.
Improvements in the Production of an Air Tight Easily Opened.
Closing Device for Vessels of Glass, Porcelain, Stone-ware, or
Earthenware.
I, JOSEF FLIEGEL, of Mallmitz, Silesia, in the Empire of Germany, 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:
The present invention relates to the production of an air-tight, easily loosened,
closing device for vessels (jars, jugs, tankards and the like,) intended to contain
liquids without employing any packing ring or similar device. The vessels them-
selves or the parts of the same which form the closing device are made of porcelain,
stone-ware or earthenware and under this invention the two pieces forming the
closing device, that is to say, the complete cover and the mouth of the neck of the
vessel, forming the outlet or opening, are ground or polished down, one on to
the other, without being subjected to any previous preparation, ordinary grinding
Inaterial such as wet sand, emery, or similar substances being employed in the
process. In order that the cover ground down on to the neck of the vessel may be
air-tight, the closing mechanism must be so arranged that the two pieces by means
of which the closing is effected are pressed against one another and held firmly in
that condition. A ground conical closing surface would however often make the
loosening of the cover very difficult or even impossible apart from which the closing
parts would be easily broken owing to the inside pressure produced. It is therefore
absolutely necessary that the closing surfaces should not be curved and, accordingly,
in carrying out the operation of grinding, the cover and the neck of the vessel are
ground smoothly, one on to the other.
Hitherto in similar cases, where the production of closing parts for vessels of glass
and the like is in question, the separate parts, cover and vessel have their contact
surfaces ground separately, in consequence of which a reasonably air-tight closing
can only be obtained by a tedious and expensive operation, as for instance by a sub-
sequent grinding of the previously ground glass stopper. In view of this difficulty
the manufacture of jars, tankards, jugs and the like of porcelain stone-ware or earthen-
ware with ground closing parts has not hitherto been carried out. By the present
invention, it possible to produce in a manner at once simple and inexpensive the
air-tight closing of such vessels, or of others having covers or necks made of the
the materials mentioned.
I will now describe the invention with reference to the accompanying
drawings.
The grinding process can be carried out in various ways which should be suited to
the particular purpose. For instance the intended porcelain cover A may as shewn
in Fig. 1 be suitably fastened to a disc D, which is rapidly revolved by means of a
handwheel or pulley wheel C. The porcelain vessel B to which the cover belongs lies
in a clamp or holding device E, which impels it with a suitable pressure against the
cover A. The vessel B may be partially filled with wet grinding sand or the like
before being mounted. Finally the grinding apparatus is further provided with a
DO077

page_text: supply channel F for the wet grinding material. On the other hand, the vessel may
be fastened to the disc D, and the cover be laid in the holding device E, or the
grinding apparatus may be so arranged that both of the closing parts rotate in hori-
zontal or vertical planes, and preferably in opposite directions or at different rates of
speed.
The grinding process is effected by the machine automatically, so that in carrying
out the present invention a single workman can simultaneously attend to a number
of such grinding machines.
the
In Figs. 2 and 3 an example is given of a method of firmly closing together
cover and the vessel containing the liquid, designed especially for
transportation.
Cemented to the cover a is an iron band b (the ends of which have a springy
action) which is hinged at f to a metal ring c, and is provided with pins b¹ b¹, pro-
jecting beyond the circumference. The vessel C is enclosed by a metal ring c, with
two lugs c¹, which support a curved handle piece d.
When the handle piece d is
turned down, it engages with the pins 61 61 of the cover a at its curved part and
presses the ground under surface of the cover on to the ground neck of the bottle.
The handle piece d is connected to the ring c by means of a lead seal or other suitable
device. If after loosening the seal the bent piece d be turned backwards into the
position shewn by the dotted lines on Fig. 2, the cover a can at once be removed
from G without any trouble.
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. A process for a production of an air-tight easily opened closing device for vessels
made of porcelain, stone-ware, earthenware or the like, intended to contain liquids,
without the employment of a packing ring, the distinguishing feature of which is
that the cover is ground on to the neck of the vessel, without any previous
preparation, by means of suitable grinding apparatus, as herein described and set
forth.
A
1000
Dated way
герцагу 1030.
S. S. BROMHEAD,
Agent for Applicant, 171, Queen Victoria Street, London, E.C.