Coating apparatus – Projection or spray type – With hood or offtake for waste material
Patent
1982-01-11
1983-09-06
Beck, Shrive P.
Coating apparatus
Projection or spray type
With hood or offtake for waste material
98115SB, 118DIG7, 427424, B05B 1300, B05B 1504
Patent
active
044022794
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a treatment chamber intended to be used for example as a spray booth.
It is a principal object of the present invention to provide a treatment chamber of the kind mentioned, which is easy to clean, by way of example by removing excess colour in case it is used as a spray booth and in connection with such application permits the installation of for example nozzles for colour spray at optional points along the longitudinal extension of the treatment chamber.
This purpose is obtained by means of a treatment chamber according to the present invention, which is substantially characterized by an endless band, which is spirally rerouted and displaceable in the longitudinal direction of the chamber and forms the lateral walls of the same.
An example of embodiment of the invention is described in the following, reference being made to the accompanying drawings, in which:
FIG. 1 shows the treatment chamber in its position of use with its driving and supporting means and the treatment equipment belonging to the installation,
FIG. 2 schematically shows that the treatment chamber is formed by an endless band,
FIG. 3 shows the sealing strips of two lateral edges of the band, which sealing strips can bear against each other, and moreover a spray nozzle introduced between said strips, and
FIGS. 4 and 5 show an embodiment of a driving means for the band in a side elevational view in the longitudinal direction of the band.
A treatment chamber, which by way of example can be used as a spray booth, is formed by an endless easily flexible band 1, which suitably exhibits good springing properties and is spirally rerouted by means of backing rollers, not shown in the drawings. The band 1, which substantially is made of electrically conducting material, by way of example spring steel, and which preferably is grounded, is rerouted at both ends of the spray booth round rerouting rollers 2 and 3 respectively, which occupy oblique positions, as can be seen in the drawings. The band 1 forms a straight portion 4 between said two rerouting rollers 2 and 3 respectively, along which straight portion different band treatment means are arranged. Said treatment means, which by way of example can comprise a suction device or a burner 5, a washing means 6 and a drier 7, are provided for the removal of objects not desired, such as for example paint, from the band 1. The band 1, which is movably supported by the backing rollers, is driven in the direction of the arrow by means of long driving rollers 8, each one supported in its bay frame 9 and 10 respectively, said bay frames being provided at the input end 11 and the output end 12 respectively of the treatment chamber. The driving rollers 8 are at one of their ends driven by for example a driving motor 13, which is attached to one of the bay frames 9, and the outside of the driving rollers bears against the plane outside 1A of the band 1 and drives the band 1 according to the rotation of the rollers. The bay frame 9, which is located at the input end 11, supports a jockey roller 14 provided to guide the band 1, which is led to the input opening 11 of the treatment chamber, whereas the other bay frame 10 exhibits a snorkellike tubular guide 15, by means of which the outgoing band 2 is guided, when it is fed out from the output end 12 of the treatment chamber.
A supporting means 16 also extends through the treatment chamber and comprises by way of example an endless chain, in which the objects to be treated are suspended and fed forwards through the treatment chamber. The upper portions of the two bay frames 9 and 10 respectively exhibit slits 17, and projecting stiffening flanges 18 and 19 respectively form input and output openings respectively for the objects to be treated.
A sealing strip 20 and 21 respectively is fastened along the lateral edges 1B and 1C respectively of the band 1, said sealing strip with one lateral edge gripping round said lateral edge 1B, 1C of the band and with its other lateral edge forming a resilient seal, which by way of example exh
REFERENCES:
patent: 2486877 (1949-11-01), Ransburg et al.
patent: 2854946 (1958-10-01), Norris
patent: 3870016 (1975-03-01), Schneider
patent: 3874970 (1975-04-01), Dunn
patent: 4323030 (1982-04-01), Lehmann
Heed Bjorn
Witte Stefan H.
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