Patent Application
20140116843
1. Technical Field
This invention relates to material handling and packaging. More specifically, the invention relates to a system and method for accurately and quickly orienting articles, such as desiccant canisters, for repeatable conveyance.
2. Description of Related Art
Sorbents have been used conventionally in packaging of products to extend the life of those products. In one application, a sorbent is provided in a canister, such as a polymer-based canister, and that canister is placed in a larger container designed to hold some product. This application is particularly well known in the pharmaceutical and nutraceutical arts, in which the sorbent canister is placed in a bottle or vial along with dry pharmaceuticals, such as pills, to absorb any moisture in the bottle.
Conventionally, the canisters have been placed in the containers before or after they are filled with the pharmaceutical and either manually or by automated processes. However, the demand for pharmaceuticals has increased immensely. While automated processes to dispense pharmaceuticals have been re-worked to quicken the dispensing of the pharmaceutical into the container, the time it takes to place the canister in the container is too slow. In fact, the act of placing the sorbent canister in the container is one of the slowest processes, and thus slows the entire pharmaceutical packaging system.
One of the reasons that insertion of sorbent canisters into larger containers is slow is that it is difficult to orient canisters upstream of a dispensing station, so that a steady supply of canisters is available.
Thus, there is a need in the art for an improved system that quickly and reliably orients sorbent canisters, for example, to prepare them for dispensing.
The present disclosure addresses the foregoing needs in the art by providing systems and methods for orienting a plurality of like articles, such as sorbent canisters.
In one aspect, an apparatus for orienting articles includes a bowl having a sidewall and angled relative to horizontal, a disc disposed in the bowl and rotatable relative to the bowl, the disc having a radius proximate its outer periphery defining a groove sized to receive one of the articles in a predetermined orientation, and a diverter for diverting canisters contained in the groove through an outlet in the sidewall of the bowl.
These and other aspects, features, and benefits of the invention will be appreciated further with reference to the following detailed description of the invention and accompanying figures, in which preferred embodiments are described and illustrated.
This disclosure relates generally to dispensing articles in a controlled and consistent manner. An exemplary embodiment will be described hereinafter in which the article is a substantially-cylindrical canister containing a sorbent. The invention is not limited to dispensing sorbent canisters. Those having ordinary skill in the art will understand that the inventive concepts of this disclosure may be applied across a number of industries, to dispense any number of differently sized and constituted articles.
One embodiment of the invention is illustrated in
As shown in
The base 110 includes a pair of angled sides 112 and a top surface 114. The angled sides 112 are disposed on a horizontal surface, and the top surface is fixed to the sides 112, to angle the substantially planar top surface 114, relative to the horizontal. In a preferred embodiment, the top surface 114 is angled relative to horizontal between about 10-degrees and about 15-degrees and more preferably about 14-degrees. The purpose of the angled top surface 114 will be described in more detail below.
The bowl 120 generally includes a cylindrical sidewall 122 that extends upwardly from the base 110, terminating at a bowl top 124. More specifically, the sidewall 122 is disposed on and extends upwardly normal to the top surface of the base. Accordingly, the bowl 120 is angled relative to horizontal. The sidewall 122 is preferably made of a material such as sheet metal, and is formed into the cylindrical shape.
The base 110 of the feeder bowl assembly is sufficiently rigid to support the sidewall 122 of the bowl 120. In one embodiment, the base 110 includes an annular ring 116 fixed to its top surface 114 and extending thereabove. The sidewall 122 is fixed to an outer surface of the ring 116, e.g., using conventional fasteners. In another embodiment, a groove may be formed in the top surface of the base approximating the shape of the lower edge of the sidewall. When assembled, the sidewall is contained in the groove and fasteners are used to fix the sidewall relative to the base.
The base 110 also includes a central cutout 118, which will be described in more detail, below.
The sorting disc 130 is illustrated in
In the embodiment of the figures, the radius 138 forms the groove, but a radius is not required. Other stepped profiles or any profile having an overall concave shape may alternatively be used, so long as they provide a groove in which the canisters can be properly oriented.
The actuator 150 is disposed on a bottom of the top surface 114 and is connected to the sorting disc 130 to rotate the disc 130. In the illustrated embodiment, a mounting flange 152 is provided on the body of the actuator 150, to connect the actuator to the sorting disc through the base central cutout 118. In the illustrated embodiment, the disc 130 includes a through hole 132 through which the shaft of a knob 139 passes. In one embodiment, the shaft of the knob threadably engages with a rotating shaft on the actuator 150. Other methods of attaching the disc 130 to the actuator 150 also will be appreciated by those having ordinary skill in the art.
In operation, a plurality of like-shaped and like-sized canisters are placed into the bowl, on top of the disc. Because the bowl is angled relative to horizontal, gravity will act on the canisters to pull them to the low side of the bowl. The disc rotates, preferably continuously, and as it rotates, canisters filter into the groove created by the radius 138 on the disc 130 and the sidewall 122. Proper sizing of the radius and friction between the disc 130 and the canisters retains properly oriented canisters in the groove as the disc rotates. Thus, canisters oriented in the groove are successfully rotated from the low side of the bowl, around the circumference of the bowl. In the illustrated embodiment, the disc rotates counter-clockwise to deliver canisters approximately 270-degrees from the lowest position to an outlet 160.
The outlet 160 is illustrated in
As will be appreciated from the foregoing, canisters randomly placed into the bowl 120 will orient properly in the circumferential groove formed by the radius 138 and the sidewall 122. As the disc 130 rotates under the canisters, oriented canisters rotate around the bowl until they are diverted out of the bowl at the outlet 160.
While the canisters will generally orient properly, the feeder bowl assembly also includes provisions to ensure that improperly oriented canisters do not interfere with proper operation. Once such provision includes a series of cutouts 172 (two are shown) in the sidewall and a compressed air source 174 provided outside the bowl 120 blowing air through the cutouts 172. The cutouts are at a height of the sidewall that is slightly above a properly oriented canister contained in the groove. Thus, compressed air entering the bowl through the cutouts 172 will not affect the properly oriented canister, but will push any canister that is not properly oriented, e.g., because it is standing on end or is on top of a properly oriented canister, toward the center of the bowl. Once in the center of the bowl, the canister will fall back to the bottom and await its next opportunity to enter the groove.
Although the illustrated embodiment shows both the compressed-air and star-wheel provisions for removing improperly oriented canisters, only one of these solutions may be necessary. Other solutions also may be utilized. For example, a physical stop, such as a wall protruding inwardly from the sidewall above the height of a properly-oriented canister may be sufficient to remove any improperly oriented canisters.
Filling the bowl with canisters may be accomplished through the bowl's open top, but, as shown in
The lid 140 is retained on the bowl 110 to cover the open top of the bowl. Any known mechanism(s) may be used to retain and remove the lid 140. In the illustrated embodiment, the lid 140 also includes a handle 144. A conventional keyed safety switch 148 also is provided, to ensure that the lid 140 is not unsafely removed, e.g., while the bowl is in operation. The lid may be made from any conventional materials, and in some embodiments is preferably clear such that a user can visually inspect an amount of canisters therein.
The inventors have found that an angle of between about 10 and 15 degrees relative to horizontal is sufficient to both allow gravity to carry canisters to the low end of the bowl and allow the canisters to stay in the groove as the disc rotates. It is possible, however, that in some instances friction may not be sufficient to retain the canisters in the groove as the disc rotates. For example, if the canisters are specially coated, they may have a tendency to fall back toward the low end of the bowl when the disc rotates, instead of continuing along over the high end of the bowl and out the outlet 160. Accordingly, in another embodiment a compressed air nozzle may be provided along the path of the canister, to provide an assisting force to ensure that properly-oriented canisters do not slide back down the groove toward the low end of the bowl. Put another way, the system may be further provided with one or more in-line air jets, to push the canisters counterclockwise in the groove, toward the outlet.
In another embodiment, also to combat the issue of canisters slipping back in the groove, the disc is provided with a relatively higher friction surface at the radius. For example, the surface of the radius may be knurled or otherwise textured. Or, an entirely different material, which provides higher friction, may be applied to the radius. For example, a material could be applied by adhesive or the like, and that has a higher coefficient of friction than the disc material.
The feeder bowl assembly described above is particularly useful at orienting generally cylindrical articles, although it could be used to orient other articles, as required. Moreover, the feeder bowl assembly is adaptable to differently-sized articles. For example, the size of the radius in the disc may be altered to create a larger or smaller groove. Moreover, the heights of the star wheel 184, air outlets 172 and any applicable sensors may also be raised or lowered to accommodate differently sized canisters.
While the invention has been described in connection with several presently preferred embodiments thereof, those skilled in the art will appreciate that many modifications and changes may be made therein without departing from the true spirit and scope of the invention which accordingly is intended to be defined solely by the appended claims.
