Note: Descriptions are shown in the official language in which they were submitted.
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Deyice For The Application Of Adhesive
The present invention relates to a device for
dispensing adhesive according to the preamble of patent
claim 1. Various devices for dispensing adhesive, which
are used above all for dispensing adhesive onto floors
for the laying of parquet flooring, are known, these
devices having a container for adhesive, which is
connected to a dispensing nozzle. When these devices
are used, adhesive is conveyed out of the nozzle onto
the floor, and it is as a rule necessary to distribute
the adhesive by means of a spatula, this work not only
being laborious but also leading to work clothes being
soiled.
Starting from this known state of the art, it is an
object of the present invention to indicate a device
for dispensing adhesive which guarantees more efficient
application of adhesive to the floor and allows working
with this device to be carried out in a way which is
not only kinder to joints but also cleaner. A device
which achieves this object is indicated in patent claim
1.
In a preferred embodiment, the glue strip of the device
is easy to clean, and, in further developments
according to dependent claims, the device is
environmentally friendly as a very small amount of
waste arises.
The invention is explained in greater detail below with
reference to drawings of illustrative embodiments, in
which:
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Figure 1 shows a side view of a first illustrative
embodiment of a dispensing device according
to the invention;
Figure 2 shows another side view of the device from
Fig. 1;
Figure 3 shows a view from above of the device from
Fig. 1;
Figure 4 shows a side view of a second illustrative
embodiment of the device according to the
invention;
Figure 5 shows another side view of the device from
Fig. 4;
Figure 6 shows the device from Fig. 4 from above;
Figure 7 shows a side view of a further illustrative
embodiment of the device according to the
invention;
Figure 8 shows the device from Fig. 7 from above;
Figure 9 shows a plan view, partly in section, of a
further illustrative embodiment of a device
according to the invention, and
Figure 10 shows a section along the line X-X in
Figure 9.
The first illustrative embodiment, the dispensing
device 1, comprises two adhesive cylinders 2 and 3 and
also an adhesive strip 4 and a compressed-air supply
arrangement 5. The adhesive cylinders 2 and 3 serve to
receive adhesive bags (not drawn here) and have, for
dispensing, a piston 6, which has a sealing ring 7, in
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order that the compressed air does not flow off around
the piston and thus reduces the pressure, and a nose-
shaped front part 8, the shape of which corresponds to
the funnel-shaped inlet 9 of the nozzle 10.
Arranged between the cylinder outlet 12 and the
adhesive strip is a nozzle 10, which leads to a cavity
16, starting from which ducts lla - llg are arranged,
which end in dispensing openings 14a - 14g in the
adhesive strip. The cavity 16 ensures that the adhesive
is conducted uniformly to all dispensing openings,
which makes uniform application possible. The
dispensing openings and their mutual spacing are
adapted to the various parquet strip widths.
The adhesive strip 4 consists of two mutually
complementary parts 4A and 4B, the two parts being
interconnected by cheese-head screws 13. The adhesive
delivery is determined and regulated by the size and
number of the dispensing openings, the speed of travel
and the system pressure.
The nozzle is let-in in the adhesive strip 4 and cannot
fall out after the two-part adhesive strip has been
screwed together. The adhesive strip is, with the
nozzles, attached to the adhesive cylinder by means of
a nut 12M.
The entire adhesive strip is coated with an adhesive-
repellent plastic, for example with Teflon~. By virtue
of this, the adhesive does not cling to the strip after
setting and can easily be removed, by virtue of which
the adhesive strip can be cleaned rapidly. In order
that the adhesive strip does not touch the floor during
use of the device and consequently the Teflon° layer is
not damaged, rollers 15, which are attached to the
strip via, for example, a deep-groove ball bearing, are
located at both ends of the adhesive strip. The two
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adhesive cylinders are held together by two spectacle-
type supports 17 and 18, which can be adapted to the
various adhesive strips or exchanged according to
adhesive strip type.
The two illustrative embodiments according to Figures 1
to 3 and 4 to 6 are operated by means of compressed
air. The external compressed-air supply takes place via
a supply hose 19, which is connected via a connection
20 to a handle 21, from which the internal compressed
air is conducted to the various adhesive cylinders. The
handle 21 is attached to the adhesive cylinder 2 by
means of a clamping ring 22 and has a push-button valve
23, which is acted on by the external feed line 19 and
can distribute the compressed air to the outgoing line
24 in a proportioned manner.
The line 24 leads to a distributor 25, in this case a
double distributor, from which the compressed air is
conveyed to the adhesive cylinders 2 and 3. A line 26
runs from the distributor 25 to the inlet of a quick-
action ventilating valve 27. The quick-action
ventilating valve 27 comprises a diaphragm 28, a
diaphragm cover 29 and a tube cover 30. The valve with
the inlet is attached to the adhesive cylinder by means
of a tube nut 31.
The quick-action ventilating valve ensures that the
pressure build-up in the adhesive cylinder is reduced
very rapidly when the push-button valve is released.
This prevents adhesive continuing to be pressed out of
the adhesive strip. For safety reasons, the quick-
action ventilating valve 27 is connected to the piston
6 via a cord connection in order to prevent the piston
being ejected in the event of unintentional actuation
of the push-button valve.
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For filling of the adhesive cylinder, the piston is
moved in the direction of the quick-action ventilating
valve 27. After the adhesive bag has been introduced,
the nut 12M is attached to the adhesive cylinder tube .
The device is thus ready for use. Two sealing rings 32
and 33 can also be seen in the drawing.
Figure 4 shows a dispensing device 34 which has a third
adhesive cylinder 35 in addition to the two adhesive
cylinders 2 and 3, the adhesive strip 36 accordingly
having three nozzles 10 which end in the cavity 16,
from which, however, in each case four ducts 37a, 37b,
37c and 37d branch off, the adhesive strip accordingly
having three sets of four dispensing openings 38a, 38b,
38c and 38d. The adhesive strip has the same rollers 15
as the adhesive strip for two adhesive cylinders and
the same cor~struction.
The compressed-air supply takes place in the same way
as in the first illustrative embodiment, the handle 31
being mounted on the central cylinder 2, and a triple
distributor 38 being present instead of a double
distributor 25, so that the compressed air is conducted
both to the adhesive cylinder 2 and, via lines 26 and
57, to the other two adhesive cylinders 3 and 35. The
functioning and the pistons etc. are identical to those
of the first illustrative embodiment.
In the illustrative embodiment according to Figures 7
and 8, a variant embodiment is illustrated, in which no
compressed air is required for dispensing the adhesive,
but mechanical driving of the dispensing piston takes
place. This has the advantage that a compressed-air
line, which is not available everywhere, is not
required and that attention does not have to be paid to
a, frequently irritating, supply hose.
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In a similar way to the device 1, the device 42 has two
adhesive cylinders 43 and 44, which are interconnected
via the sane spectacle-type supports 17 and 18. The
cylinder outlet 12 and the nozzles and in particular
the adhesive strip are the same as in the first
illustrative embodiment.
The adhesive is dispensed by means of a threaded rod
45, which is arranged between the two adhesive
cylinders and is guided by bearings 46 and 47. The
threaded rod can have a hexagon socket 48 at one of its
ends, for e~cample, so as to be driven by a device such
as is found on a building site, for example a cordless
drill. The bearing arrangements 46, 47 are ball bearing
arrangements known per se and are not explained in
detail here.
The threaded rod 45 is connected to the two pistons 52
via a nut piece 49 and a continuous piston connection
50. The piston connection is connected to the piston
via a connecting piece 51, which is attached to the
two-part piston 52. The piston 52 consists of a front
part 53 and a guide 54 at a spacing, the connecting
piece 51 being attached to both parts.
The front part of the piston is of the same design as
in the previous illustrative embodiments in order to
dispense the adhesive as completely as possible. The
adhesive cylinder is closed at the top with a screw
cover 55. In order to allow the movement of the piston
connection, the adhesive cylinder tube 56 is slotted,
as emerges from Fig. 7. For filling of the adhesive
cylinder, the nut piece is, with the piston, drawn in
the direction of the screw cover, after which the
adhesive bays can be introduced and the adhesive strip
can be attached by means of the nuts 12M.
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Starting from this example with two adhesive cylinders,
devices with more than two adhesive cylinders with a
mechanical piston drive are also possible, the
mechanical propulsion having to be adapted. The drive
of the threaded rod or of a similar arrangement can
also take place by means of drives other than cordless
drills or the like, for example via an electric motor
or the like, again preferably operated by batteries or
rechargeable batteries.
Starting from the illustrative embodiments described
above according to Figures 1 - 8, it can be seen that
both devices with one adhesive cylinder and a
correspondingly adapted adhesive strip and devices with
more than three adhesive cylinders are possible, in
each case the adhesive strip being made in a similar
way and consisting of two parts and having two castors
arranged on the two sides. It is a common feature of
all adhesive strips that they are coated with an
adhesive-repellent plastic in order for it to be
possible to perform very rapid cleaning. The adhesive
containers do not necessarily have to be adhesive
cylinders; other shapes are also possible.
Figures 9 and 10 illustrate a further illustrative
embodiment, which brings about considerable
simplification. The adhesive strip 57 is connected to a
device 58 which has three adhesive cylinders 59, 60 and
61, in a similar way to in the device 34, the same
parts being provided with the same reference numbers
and the other parts of the device being the same as
those described previously.
Departing from the previous examples, the adhesive
strip 57 is made in one piece from an adhesive-
repellent plastic and has a continuous longitudinal
duct 62, in which the outlets 63 - 65 of a transition
piece 66 end, the longitudinal duct 62 serving as a
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cavity, from which outlet ducts 67 extend, which end in
the dispensing openings 68.
As can be seen from Figure 10, the housing 69 of the
adhesive strip is not of symmetrical design in relation
to the dispensing openings 68, as these are arranged
above the apex of the tapering housing. In Figure 10,
"above" means the position in relation to the device
when used on a floor. This ensures a better, more
uniform adhesive flow.
The asymmetrical position of the dispensing openings is
also advantageous for the adhesive strips 4 and 36
described previously.
The adhesive strip 57 has similar rollers 15 to those
described previously, which are attached to a
rectangular tube 70, which extends above the adhesive
strip inlets. This allows the three transition pieces
66 with the funnel-shaped nozzles 9 and the outlets 63
- 65 and also the nuts 12M, which serve for receiving
and attaching the adhesive cylinders 59 - 61 with the
adhesive bags, to be attached thereto, which brings
about a further simplification. The rectangular tube 70
is attached to the housing 69 by means of two lateral
sheet-metal strips 71, which extend on the two sides.
The rollers 15 are likewise attached to the lateral
metal sheets 71, on the inside.
