Improvements in Presses for Forming Artificial Stones; Slabs, Tiles, and the like.
Year: 1897

page_text: Date of Application, 8th Feb., 1897-Accepted, 3rd Apr., 1897
COMPLETE SPECIFICATION..
Improvements in Presses for Forming Artificial Stones; Slabs, Tiles,
and the like.
1, CLARA LUCKE, Gentlewoman of Eilenburg, Germany, Proprietress of the
Firm of C. Lucke, Engineering Works of Eilenburg, Germany, do hereby
declare the nature of my invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement :-
In the presses for artificial stones, slabs, tiles and the like hitherto employed, the
stone has been taken out of the press after compression, the press or mould
remaining stationary. This method often causes the corners of the product to
get chipped and broken owing to the difficulty in getting it out of the mould.
According to the present invention, the frame of the mould is constructed so that
the same may be lifted off the product therein and the latter conveniently removed
without the risk of getting broken or chipped.
And in order to render the present specification more easily intelligible reference
is had to the accompanying drawing in which similar letters of reference denote
similar parts throughout the several views.
Fig. 1 is a sectional elevation of a press showing the lever carrying the pressure
plate in its raised position,
Fig. 2 is a similar elevation showing the pressure plate down on the slab, being a
section on line M-M of Fig. 3.
Fig. 3 is a plan of Figure 2, with the pressure plate lever removed,
Fig. 4 a plan of the top plate of the lever arrangement for raising the mould
frame, and
Fig. 5 a detail horizontal section showing the connection of the hand lever to the
stem of the frame carrying plate.
On the plate B of table A is mounted the mould frame R, which fits on to the
table within the fixed frame or guide c. The frame R is mounted on four or more
bolts extending vertically downwards and secured at their lower ends in an upper
plate C having a vertically downwardly extending stem d guided at its lower end
in the machine frame A. A hard lever H is pivoted as shown in the machine frame
and its free end attached by means of a link H¹ to the stem d, so that when the
outer end of the said hand lever is depressed it will raise the plate C and with it
the mould fram e R. A plate y is arranged within the frame R on to which the
stone or tile mass is pressed, this mass is then covered with a second plate y at the
top. A lever D is pivoted at o to the frame and in this lever is adjustably mounted
a pressure plate P adapted to fit on to the upper plate y when the lever is brought
into the position shown at Figure 2.
The operation of the device is very simple :-When the mass has been sufficiently
formed or pressed by means of the lever D and the plate P, the latter are thrown
back, the lever H having first been depressed and the frame R raised from the
position shown at Figure 1 to that of Figure 2 and the stone is then carefully
taken from the mould after the upper plate y has been removed.
The advantage gained by the present invention will be obvious. Thus when the
frame was stationary, and it was required to take the finished product out of the
same, the distance through which the product had to be lifted out of the frame R
which tightly enclosed it, often caused breakage and chipping of the corners of the

page_text: lower fine surface of the slab or tile. According to the present invention, the
lower surface of the product, which is always supposed to be the fine surface, has
comparatively no distance to pass through the frame of the mould, as the latter is
lifted off the same by the lever H. and hardly moves over the edges of the lower
surface at all.
The present invention is not confined to the particular means of raising the
frame R which may be done in a variety of ways without departing from the nature
of the invention.
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. In a press for forming artificial stones, tiles slabs and the like, the combination
of a mould formed by top and bottom plates and by a frame forming the sides,
an upper adjustable pressure plate and means for actuating the same, and means
in connection with the frame forming the mould sides, to raise the same vertically off
the product pressed in the manner substantially as described.
2. The combination of a table A forming the bottom of the mould, a lever D
pivoted thereto and carrying the pressure plate P, a frame R forming the sides
of the mould and standing on said table, and means for raising the said frame
above the level of the pressure plate, when the latter is down on the mould,
substantially as described and shown.
3. The combination of a table A forming the bottom of the mould, a lever D
mounted thereon and carrying the pressure plate P, a frame R forming the sides of
the mould and having downwardly extending bolts i, a plate to which said bolts
are affixed, a downwardly extending stem d to said plate and a fulcrumed hand
lever H linked to said stem substantially as described.
Dated this 8th day of February 1897
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.