Coating apparatus – Edible base or coating type – Tumbling particulate work
Patent
1984-11-16
1986-05-06
Beck, Shrive P.
Coating apparatus
Edible base or coating type
Tumbling particulate work
118303, B05C 500, B05B 1700
Patent
active
045864578
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to an apparatus for the production of coated pills wherein granulated materials such as pill cores are covered with a multilayer coating, the apparatus being provided with a drum confined to rotate about an horizontal axis being supported on two pivot bearings axially displaced with respect to each other.
BACKGROUND OF THE INVENTION
In the case of a known device for coating pills of this kind, larger drums are mostly supported via crown bearings, namely two annular rails are mounted on the periphery of the drum at both ends, these rails being rotatably supported on bearing rollers fastened to the base. The operation of such drums however have various disadvantages. For one, the rotation produces constant wobbling resulting in uneven coating. In addition to that, since the running speed at the bearing point is relatively high due to the large diameter of the drum, the operation of the drum causes to constant, disturbing noise.
In order to avoid that, smaller drums of such apparatus were supported overhung at one end (German open application No. 28 05 801), whereby at the opposite frontal end of the drum a closable loading opening is provided. Various advantages regarding the loading and unloading derive from this construction and the support can be achieved in this case with two relatively small roller bearings mounted relatively close to each other, without having to absorb substantial axial forces or tilting moments.
In order to continuously lower the processing and manufacturing costs of pills and comparable pharmaceutical products, as well as sweets, lately larger and larger drums are used, which have to be supported at both frontal ends in pivot bearings (German open application No. 31 31 808). The rolling effect, the layer height, the drying action and many other characteristics vary with the diameter of the drum and therefore the length of the drum is selected correspondingly dimensioned. This leads in the case of reasonable and economical constructions, respectively a light construction of the drum, to deflection, meaning that the duct connections laterally molded to the drum and respectively the support hubs become tilted with respect to the horizontal. High edge pressures result with slide bearings or even regular roller bearings and the use of self-aligning bearings is here too expensive. On the other hand, the use of roller bearings is preferred due to reduced resistance to rotation and the improvement of hygienic conditions.
OBJECT OF THE INVENTION
The present invention departs from the afore-described apparatus for making coated pills and attains the object to develop an improved apparatus in the simplest possible way to reduce the cost of the bearing, the axial and edge load to be absorbed and to prolong the life of the bearing.
SUMMARY OF THE INVENTION
This object is attained according to the invention by having at least one of the two pivot bearings built as a rotatable linkage consisting of a light roller bearing which is connected to a support, rotatably adjustable in any direction. As opposed to more expensive self-aligning bearings or the like, the alignment in this case takes place not at the roller surface itself but the roller bearing remains unaffected with its inner- and outer rings and is freed from the effect of forces only by the linkage of one of its two rings to the support which is capable of turning in any direction. Since only reduced, neglectable axial forces result from the operation of the drum, the bearings to be used can be dimensioned considering the pure radial load only. It is best to use in this case a simple and detachable ball journal bearing, respectively regular grooved ball bearings. Actually one can use in this case what trade people denigratorily call "turning connections" or "paper bearings". The cost savings resulting therefrom are so important that they can not be exhausted even with a very sophisticated system of rotation-adjustment control.
At least the pivot bearing used as a fixed support can ther
REFERENCES:
patent: 2734406 (1956-02-01), O'Malley
patent: 3390490 (1968-07-01), Hesslenberg
patent: 3923349 (1975-12-01), Herbst
patent: 4245580 (1981-01-01), Okawara
patent: 4274360 (1981-06-01), Hofmann et al.
patent: 4499847 (1985-02-01), Dunaitschik
Beck Shrive P.
Driam Metallprodukt GmbH & Co. KG
Dubno Herbert
Ross Karl F.
LandOfFree
Drum-equipped apparatus for the production of coated pills does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drum-equipped apparatus for the production of coated pills, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drum-equipped apparatus for the production of coated pills will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1568839