Note: Descriptions are shown in the official language in which they were submitted.
21~823
Paving Stone or other Paving
Block or Paving Slab
This invention refers to a paving stone or to any other
paving block or a paving slab.
Various means of decorating the surface of concrete
paving stones and paving slabs are known. The use of ex-
posed aggregate concrete, in which a layer of gravel is
exposed, is especially widespread. Further known forms
of surface treatment are sandblasting and water jet
blasting.
Also known are so-called facings, i.e. thin surface
layers of a concrete provided with expensive aggregates
such as qlitter grains or crushed marble, or with dyed
cement. Finally, surface reliefs created during molding
are known.
The object of the invention is to find an additional
technical decorating possibility.
This object is carried out in accordance with the inven-
tion in that a paving stone or other paving block or sla~
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has an insert made of a different material or merely
having a different surface.
The inserts of the concrete stones or slabs according to
the invention, which are otherwise produced by conven-
tional means, consist for example of metal, natural rock,
ceramics, glass, plastic, wood or even cork. An example
of an insert merely having a different surface would be
one of ground or smoothed concrete.
This decorating technique, however, is also possible in
paving blocks or slabs made of other materials such as
ceramics or recycled plastic. In any event, however, the
possibilities for variation are put to use during the
molding itself in the compression or casting i~old, for
tne creation of molded spaces for the insertion of the
material with its decorative surface an/or contour.
The insert can be molded into the paving stone or the
like during the pressing or casti~g of the same, thus
creating its own place. However, it can also be inserted
separately into a recess produced by the mold during the
molding process.
For this in turn there ~Le various possibilities:
The insert can be cast in the recess.
The insert can be set into the recess and cemented in
place.
The insert can be set into the recess and secured by
clamping.
For the latter instance there are in turn two different
possibilities, namely that the insert be enclosed at its
edge in the recess and be clamped by said edge, and/or
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that it be annular in shape and be clamped by its inner
edge.
The insert molded into the paving stone is anchored if
necessary. For practical purposes a plurality of molded-
in inserts has a joint anchorage holding the plurality of
inserts in position relative to one another until the
molding has been completed. Depending on the technical
method of concrete production, it is basically also pos-
sible to press the inserts into the still soft mass, if
applicable while being vibrated, only after the actual
paving stone or paving slab has been formed.
The inserts do not have to be enclosed at their edges on
all sides. The nature of the insert results from the de-
pression in which it is arranged. The insert will
usually be flush with the remaining surface. It can,
however, be used to create a relief, i.e. it can lie
somewhat below the remaining surface or stand out above
it.
For instance, the insert can be arranged as a border
strip or at least be pa~tly placed on a projecting part
of the pa~ing stone, other paving block or paving slab,
and in the combination of paving stones, other paving
blocks or paving slabs it can have the surface shape of a
filler piece.
This latter application is particularly advantageous in-
sofar as the appearance of a separate filler piece such
as that known at the conjunction of lour cut-off corners
of paving stones or slab coverings is created when the
separate filling piece is replaced with a projecting part
molded onto one of the paving stones or slabs.
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Numerous possible forms of the invention are depicted be-
low on the basis of embodiments thereof.
Figures 1 to 28 each show the embodiments of the inven-
tion as plan views, sometimes other depictions, of a
paving stone or slab.
Figures 1 and 2 shGw a plan view and an exploded, iso-
metric depiction, respectively, of an insert 1 made of
sheet metal with cutouts 2. The sheet metal is molded
into the paving stone and is additionally held in the
concrete of the paving stone by four anchors 3 attached
to the sheet metal. For example, it is laid onto the
bottom of the compression mold during the molding process
prior to the pouring of the concrete. However, it could
also be pressed into the still soft mass, possibly while
being vibrated, after the concrete for the stone is
poured.
Figures 3 and 4 show a plan view and an isometric, partly
broken down view, respectively, of an insert comprising
nine cylinders 5 connected to form a unit by a grid-like
common base 4. The entire unit is molded into the con-
crete mass in that it is placed with the free ends of the
cylinders 5 on the bottom of the compression mold. To
free the end faces of the cylinders 5 lying in the stone
surface from soiling caused by concrete "milk", the stone
surface is brushed, sandblasted or the like, but pref-
erably ground or smoothed. The same is true for the in-
sert 1 and for the other, comparable cases.
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Figures 5 and 6 demonstrate the creative possibilities,
again with inserts of sheet metal secured by anchors 6
and labeled altogether with the number 7.
According to Figure 7 and Figure 8 (cut along line VIII-
VIII in Figure 7), recesses forming grooves 8 are made
with a suitable pressing die during production of the
paving stone. The grooves 8 are then filled with a plas-
tic mass 9 to just below the stone surface.
In Figure 9 square depressions 10, and in Figure ~0 and
Figure 11 (cut along line XI-XI in Figure 10) circular,
concave depressions 11 take the place of the grooves 8.
Close scrutiny of Figure 11 will reveal that the plastic
mass 12 here is sunken towards the center of the depres-
sion 11 in each case. This, too, is a decorative fea-
ture.
Figure 12 demonstrates that the technique according to
Figures 8 to 11 leaves all possibilities open as far as
dcorative design is concerned.
Figures 13 and 14 (cut alcng line XIV-XIV in Figure 13)
show various further possibilities, here with inserts 15,
16 and 17 set into preformed recesses 13 and 14. The in-
serts 15 ar,d 16 are bcrder strips cemented ir. place, the
former being mitered and the latter butt-jointed. The
border strips are made of metal or a hard plastic, for
example. Insert 17 is a block merely clamped in place
and can be made of plastic, rubber, wood or cork.
Analogously to the border strips in Figures 13 and 14,
the paving stone according to Figure 15 is provided with
diagonally arranged strips 19 as inserts, the angled ends
214582~
of which abut with no gaps. A straight abutment against
a square centerpiece 20 is shown in dotted lines as an
alternative.
According to Figure 16 and Figure 17 ( cut along line
XVII-XVII in Figure 16) inserts 21 cemented in place at
the corners are combined with a cast insert 22 in the
center.
Figure 18 shows a further creative possibility with in-
serts cemented in place.
Figure 19, on the other hand, shows inserts 25 and 26
clamped into recesses 23 and 24, the former ( 25) being a
wooden block and the latter ( 26 ! a plastic piece. As in
the case of the insert 17, a greater recess depth is pro-
vided for the inserts 25 and 26 than for the poured or
cemented in inserts.
Figures 20 and 21 in turn show inserts in the shape of
border strips 27 and 28, respectively, albeit here, in
contrast to Figures 13 and 14, not so much to form a
frame for the stone itself than to accentuate the joint.
The border strips 27 and 28 lie in this case as well in a
recess, i.e. on a shoulder of the concrete stone, across
t'leir entire width. ~he border s-.rips 27 arranged on all
sides are secured only by anchors 29 shown in Figure 20
on the right. The border strips 28 arranged on only two
sides according to Figure 21 are cemented on.
These concrete stones are laid with no gaps in between.
The paving stone with a square basic form depicted in
Figure 22 has arcs of a circle cut off of three of its
2145823
corners, i.e. a corner 30 in the shape of a quarter of a
circle has been removed in each case, and on the fourth
corner a projection 31 in the shape of three-quarters of
a circle is provided. The paving stone is laid together
with the same type of paving stones in such a way that
the three-quarter circle of the projection 3I fills three
one-quarter circles of the corners 30.
A circular recess 32 iS arranged on the projection 31.
This recess 3 2 also covers a quarter circle in the re-
mdining paving stone and is filled out with a circular
disk 33 serving as an insert cemented in place. The disk
33 consists, for instance, of natural rock or ground or
smoothed concrete.
According to Figure 23 a variation is provided in which
the circular disk is an annular disk 34 of plastic and is
clamped onto a stud 35 projecting upwardly in the recess
32.
In Figure 24 a circular recess 37 with a smaller diameter
lS formed in the projection labeled 36. A disk 38 iS
clamped and/or cemented into the recess 37. It could be
made of glass, for e~ample.
Figures 27 arld 28 correspond to Figure 24, with the modi-
fication that in Figure 27 the disk lS secured by means
of a shaft 40 with a barbed profile pressed into a de-
pression 39 in the recess 37, and in Figure 28 the disk
is secured by a barbed profile 41 on the periphery of the
disk itself.
Figure 25 corresponds to Figure 22, with an alteration in
which the corners 42 are cut off in straight lines and
21~5823
the projection 43, with a square cross section, com-
pletely replaces a filler stone. Also, a recess 44 is
located solely in said projection 43, and a square plate
45 is set as an insert into said recess 44.
Finally, Figure 26 shows an alternative to Figures 22 to
25 in which instead of a projection at one corner that
fills three other cut-off corners two projections 46 are
formed on two sides. These two projections 46 fill two
other cutouts 47 in two other sides. Recesses 48 comple~
ment the projections 46 to form a diamond. Identically
shaped plates 49 optically form a corresponding filler
plece .
Since they need only be clamped in place, it is possible
not to set the inserts according to Figures 19, 23, 24,
and particularly Figures 27 and 28 until the pavement is
being laid.
