Improved Apparatus for Pressing and Moulding Glass Plates, Tiles and the like."
Year: 1897

page_text: Date of Application, 25th Sept., 1897-Accepted, 24th Dec., 1897
66
COMPLETE SPECIFICATION.
Improved Apparatus for Pressing and Moulding Glass Plates, Tiles
and the like."
I, THEOPHIL KRAH, of No. 6, Deutscher Ring Cologne, in the German Empire.
Inventor. 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.
Glass plates or tiles are usually constructed with a bent-over rim or projection
for holding them in place on the wall or roof-scantling to which they are attached.
The object of the present invention consists of a machine, which effects the
pressing of such glass plates or tiles with bent rims on their reversed side in a
single operation. In the accompanying drawings the invention is illustrated
as follows:-Figure 1 shows a longitudinal section. Figure 2 a view from above.
Figure 3a cross section, and Figure 4 the mould which serves for the production
of the bent rims seen in perspective view. The box B rests upon a supporting
plate A provided with a projecting rim a. The cover of the said box possesses
the form of the glass plate to be shaped. The cover is provided with a rim
formed by means of the side walls of the box 13 and serving to produce a
This frame forms together
space, over which a frame open above and below fits.
with the upper side of the box B the mould for the glass plate. In the side
walls of the said frame, which are made round or angular according to the shape
of the plate to be pressed, there is secured at the top the actual mould D, which
is provided at its end side with a cavity corresponding to the shape of the glass
plate to be moulded. The lower part of the mould is formed of the cover plate
of the box B, the middle part of which is somewhat raised corresponding to the
opening of the mould D), in order to render if possible the arrangement of the
rim surrounding the glass plate. The box B, has no bottom and contains inside
a set of moulds Q, (Figure 4) movable vertically and fixed two by two in
supports K. These pieces Q, are provided at their upper side with cavities P,
Figure 4 corresponding to the bent rims. The pieces project through suitable
openings on the upper side of the box D, and when in the position of rest are
held in their normal position by means of the levers E, fixed on the side of the
box B, which levers can be actuated from the outside by means of handles or
otherwise, so that the upper surface of the said pieces Q, corresponds with the
raised upper surface of the box B. The levers E, are moveable in the vertical
slides L, so that the lowest position of the levers corresponds exactly to the normal
position of the pieces Q, in which position the same do not project above the
surfaces of B. By means of a raised foot G placed below, these pieces can
pressed up, so that they will project above the box B, corresponding to the rising
of the slides L. The box B, may be provided with one or more handles C, or
if the plates be of the requisite size (in large factories) it may be provided with
hooks in order to render it moveable by means of cranes.
be
In the same manner
the plate A, is provided with a projection M, or with corresponding hooks for
the purpose of better handling.

page_text: In order to cast the glass plate the lower open box B is placed in the base
plate A, and the pieces Q arranged to stand at the same height as the upper
side of the box B. Over the whole the piece D is then placed so that the same stands
with its slot exactly over the raised top of the box B. Into the mould thus con-
structed the hot fluid glass is then poured direct from the melting pot. A
stamp H which fits exactly in the opening of the mould D and which is provided
with a handle N is then inserted in the opening of the mould D and the glass
mass is divided equally in the mould by pressure so that the same uniformly fills
both the cavities of the pieces and also the slot c. After the plate has cooled
to the requisite temperature the stamp H is again removed and the box B with the
plate lying upon it and the mould D is 'lifted off the base plate A by
means of a crane or by means of a handle C. There is then removed also the
frame from the mould D so that the glass plate remains quite free and rests
upon the box B being only held in the latter by its turned-in rims. The base
plate G which is provided with a raised foot is then inserted under the box B
whereby the pieces with the plate resting upon them are pressed up. In
order to release the glass plate which is still held fast by the hooks P the
levers E are pushed towards the inner side of the box, whereby the pieces Q slip away
in consequence of the cavity Y over the surface of the box B and release the hooks
whereupon the plate is lifted off and cooled in the usual manner.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is:
1. The improved press for glass plates provided with bent over rims which
effects the casting and pressing of molten glass in moulds, characterised by the
arrangement of a mould in two halves (D 13), into which the molten glass is
poured through the opening in the upper part of the mould D and is uniformly
distributed by means of a stamp H passing through the said opening where-
upon the finished glass plate can be removed from its support after the removal
of the upper part of the mould D in such a manner that the parts Q which effect
the shaping of the bent-over rim are lifted by means of a raised foot underneath
the same and are then moved aside by means of levers so that the bent-over
portions are released from the mould.
2. A modification of the press set forth in Claim 1 chracterised by having
shaping pieces Q movable in the vertical direction for the formation of the bent-
over rim in the molten state, which pieces can be displaced by means of levers
in the longitudinal direction and by aid of a side cavity Y.
Dated this 25th
SUMLAM ner
VILES
17
W. P. THOMPSON & Co.
Patent Agents for the Applicant, 322, High Holborn, London, W.C.
W. P. THOMPSON & Co.
Patent Agents for the Applicant, 322, High Holborn, London, W.C.