Dispensing – Drip – leakage or waste catching or disposal – Return to main supply
Patent
1996-03-29
1998-03-24
Shaver, Kevin P.
Dispensing
Drip, leakage or waste catching or disposal
Return to main supply
222424, 222486, 425 6, 425225, B01J 220
Patent
active
057303290
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for applying free-flowing substances as strips or drops onto a transport belt passing by below.
Conventionally, such an apparatus comprises two drums rotatable relative to one another that are mounted concentrically within one another, a rotatable outer drum being provided with openings which upon rotation, can be cyclically brought into registration with at least one opening of a stationary inner drum, facing the transport belt and corresponding to the width of the transport belt. A device, surrounds in a circumferential region of the outer drum facing away from the transport belt, for substance residues back into the openings. The directing device is arranged so as to pivot about an axis arranged in a pivot mount and standing perpendicular to the axis of the drums to afford access to the outer drum. The directing device pivots from an operating position to a retracted position, away from the periphery of the drum, and in the operating position is secured parallel to the drum axis by a retaining apparatus attaching coaxially onto the stationary drum.
Apparatuses of this kind are known from DE 41 19 021 C1, in which the directing device carries a spur with a tip, that is retained in a corresponding depression in the center of the free end wall of the stationary inner drum, to secure the pivotable directing device in the operating position. With this design the axially displaceable spur must be introduced into the depression associated with it by means of a knurled screw when the directing device retainer needs to be secured; conversely, unscrewing is required when the directing device needs to be pivoted aside for maintenance purposes. This is not only complex but also, since positive fit is achieved only by the engagement of a tip, low-stability immobilization is achieved; and lastly it has also been found that lengthwise expansion of the stationary drum caused by temperatures can lead to bending of the spur retainer, which means that the arrangement of the directing device with respect to the outer drum is no longer parallel.
The underlying object of the invention is therefore, in an apparatus of the aforesaid kind, to provide for stable securing of the directing device retainer that is also insensitive to changes in length.
SUMMARY OF THE INVENTION
To achieve this object, in an apparatus of the aforesaid kind it is proposed that the inner drum be made somewhat longer than the rotatable outer drum, and that the retaining apparatus be made up of a ring guided rotatably at the free end, projecting beyond the rotatable drum, of the stationary drum; and a coupling device, detachably fastened radially to the ring, that is arranged at the end of the directing device facing away from the pivot axis of the directing device. With this configuration the directing device retainer can be held positively and stably in all operating states in alignment with the inner drum, with no difficulties arising in pivoting back and forth. In a development of the invention, the ring can be guided on a guide surface of the stationary drum so as also to yield a certain axial displaceability. Axial expansion of the drums resulting from fluctuating temperatures can be compensated for in this manner. Skewing of the retainer and the directing device are reliably prevented.
In a development of the invention, the ring can also be provided on its inner diameter with rings, having a certain elasticity, lying against the stationary drum surface, so that it is also possible to compensate for any changes in radial diameter that may occur. The elastic rings also serve to retain the ring and the coupling device associated with it in a specific position on the stationary drum when the retaining arm and directing device are removed and pivoted aside, so that recoupling can occur immediately when the retaining arm is swung back.
It has proven to be advantageous if the coupling device consists of a taper associated with one of the two parts being coupled, and of a recept
REFERENCES:
patent: 4279579 (1981-07-01), Froeschke
patent: 4578021 (1986-03-01), Schermutzki
patent: 5013498 (1991-05-01), Froeschke
patent: 5232128 (1993-08-01), Froeschke
patent: 5344087 (1994-09-01), Froeschke
patent: 5401938 (1995-03-01), Froeschke et al.
Santrade Ltd.
Shaver Kevin P.
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