Improvements in Moulding Presses for Bricks, Tiles, and the like.
Year: 1895

page_text: Date of Application, 26th July, 1895
Complete Specification Left, 22nd Apr., 1896-Accepted, 23rd May, 1896
PROVISIONAL SPECIFICATION.
Improvements in Moulding Presses for Bricks, Tiles, and the like.
1, ROBERT WALKER, of Birkenhall, Stifford, in the County of Essex, Builder,
do hereby declare the nature of this invention to be as follows:-
This invention has for its object to provide a moulding press capable of
producing bricks tiles and the like formed with undercut or dovetail channels to
enable them to be securely interlocked with each other or otherwise secured to
cement or other material.
In a moulding press constructed according to this invention the mould proper is
constructed with a movable bottom or bed plate which, when the plastic material
has been pressed by the plunger in the usual way, is forced upward by a lever or
other means, carrying the moulded article with it to the top of the mould so as to
enable it to be readily removed, automatically or by hand, to permit of a repetition
of the filling and pressing operations.
The beforementioned movable bed plate of the mould is formed with grooves or
channels in each of which are placed, at the sides or edges, rocking bars or levers
of a suitable shape to produce the required channel and capable of being pressed
outwards from each other by a central tongue so as to produce an undercut or
dovetail channel in the tile or the like.
Normally the tongue is held in its highest position, relatively to the bed plate,
and the rocking bars or levers are pressed outwards so as to form the undercut in
the article, but when the bed plate is forced upwards in the mould box, in order to
deliver the tile or the like to the top for removal. The tongue is prevented from
ascending with the said bedplate to the extremity of its travel by a suitable stop,
and such relative motion causes projections on the tongue to act upon the rocking
bars or levers, whose undercutting parts are thereby withdrawn clear of the edges
of the channels in the tiles or the like and thus permit their removal without
injury.
Dated this 26th day of July 1895.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Moulding Presses for Bricks, Tiles, and the like.
I ROBERT WALKER, of Birkenhall, Stifford, in the County of Essex, Builder,
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 for its object to provide a moulding press capable of
producing bricks, tiles and the like formed with undercut or dovetail channels to
enable them to be securely interlocked with each other or otherwise secured to
cement or other material.
is
In a moulding press constructed according to this invention the mould proper
constructed with a movable bottom or bed plate which, when the plastic material

page_text: has been pressed by the plunger in the usual way, is forced upwards by a lever or
other means, carrying the moulded article with it to the top of the mould so as to
enable it to be readily removed, automatically or by hand, to permit of a repetition
of the filling and pressing operations.
The beforementioned movable bed plate of the mould is formed with grooves or
channels in each of which are placed, at the sides or edges, rocking bars or levers
of a suitable shape to produce the required channel and capable of being pressed
outwards from each other by a central tongue so as to produce an undercut or
dovetailed chanuel in the tile, or the like. Normally the tongue is held in its
highest position, relatively to the bed plate, and the rocking bars or levers are
pressed outwards so as to form the undercut in the article, but when the bed plate
is forced upwards in the mould box in order to deliver the tile or the like to the
top for removal. The tongue is prevented from ascending with the said bed plate
to the extremity of its travel by a suitable stop, and such relative motion causes
projections on the tongue to act upon the rocking bars or levers, whose undercutting
parts are thereby withdrawn clear of the edges of the channels in the tiles or the
like and thus permit their removal without injury.
In the accompanying sheet of illustrative drawings:
Fig. 1 is a sectional elevation, and Fig. 2 a part plan of a brick mould constructed
according to this invention.
Figs. 3 and 4 are part sectional elevations of modified forms of construction.
The mould a is constructed with a movable bottom or bed plate 6 having grooves
or channels c formed at their upper edges with slight rounded projections don
which are pivoted or fulcrumed bars or levers e having projections and held
apart by the central tongue g when in its highest position relative to the movable
bottom as shown. Rods h, thickened to form shoulders above the lower bed-
plate k, are connected with the central tongue and pass through holes in the loose
bottom 6 and lower bed plate k in which they are free to slide, being regulated by
the screw nuts l.
Underneath the movable bottom are secured vertical rods or bars m which pass
through the lower bed plate k and are connected with levers or other suitable
actuating devices.
When the plastic material is forced into the mould in the ordinary manner the
projections on the levers e become embedded in the moulded block.
On raising the block to the top of the mould for removal, by means of the
movable bed plate band rods or bars m, the rocking bars e and central tongue g
are raised with it, until the nuts or stops on the rods h come in contact with the
underside of the lower bed plate and prevent further upward movement of the
central tongue. The movable bed plate and block continue to rise, causing
the lower edges of the tongue to impinge on the lower arms of the levers or
rockers and force them outwards at the bottom and inwards at their upper edges
or projections, as shown in dotted lines at n Fig. 1 thus withdrawing them from
the grooves into a position where they clear the edges of the undercut surfaces,
leaving the same intact. The rockers resume their original position when the bed
plate is again lowered.
In the modified form shown in Fig. 3 only one rocker is used in connection with
each tongue, its projecting edge being of a slightly different contour, although it is
obvious that the rockers may be modified in shape.
In the modified form shown in Fig. 4 the tongue o forms a plain groove in the
underside of the block from which it is withdrawn when the movable bed plate is
raised.
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 moulds for bricks, building blocks and the like, a movable bedplate
adapted to be raised and lowered and having grooves or channels in its upper

page_text: surface on the edges of which are fulcrumed rockers turning about their pivotal
supports and held in position by a tongue suitably supported and regulated in its
movement by a stop or stops, substantially in the manner described and illustrated
in the drawings.
2. The modified form of moulding press shown in Fig. 4 of the drawings, having
a tongue for forming a simple groove on the underside of building blocks and the
like substantially as described.
3. The improvements in moulding presses for bricks tiles and the like,
substantially as described with reference to the drawings.
Dated this 22nd day of April 1896.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.