Conveyors: power-driven – Conveyor section – Having means to enhance the friction or adherence between...
Reexamination Certificate
1998-10-09
2001-11-13
Hess, Douglas (Department: 2167)
Conveyors: power-driven
Conveyor section
Having means to enhance the friction or adherence between...
C198S619000, C198S867140
Reexamination Certificate
active
06315108
ABSTRACT:
Known from the non-prepublished Netherlands patent application 1001505 is a device and method for buffering or temporarily storing and/or setting to pitch for instance products to be successively packaged, wherein due to the use of product carriers for a plurality of products an extremely flexible arrangement can be obtained.
The present invention provides a product carrier device for carrying a plurality of infeedable and outfeedable products which is provided with means for causing transporting means to engage precisely for stepwise and/or uniform displacement of the product carrier device.
The present invention further provides a system for advancing one or more carrying means in which is received a plurality of products for processing, comprising:
a first conveyor for supplying the carrying means; and
a second conveyor arranged connecting onto the first conveyor for taking over a carrying means at a precisely determined distance relative to a preceding carrying means.
Using the product carrier device and the system according to the present invention it becomes possible to position the product carriers accurately during infeed and/or outfeed of the products into and out of the product carrier, which product carriers can be supplied at random moments in time and mutual interspacing, while the position at any moment during infeed and/or outfeed of the products must be capable of precise adjustment.
In a first preferred embodiment of the present invention the gripping means comprise one or more recesses in which parts of a chain or protrusions thereon engage precisely. Due to the precise pitch distance of the links of a chain, product carriers are positioned at a precise distance relative to each other or, more particularly, they are pressed directly against each other.
In a further preferred embodiment of the present invention the gripping means comprise a plate of magnetizable material such as steel arranged in the base or side walls of a product carrier. Such product carriers can thus be held with sufficient force against a conveyor belt due to a (permanent) magnet to be mounted under this conveyor belt. Permanent magnets are now commercially available which produce a magnetic force sufficient for this purpose which is also greater than the magnetic force which can be produced by an electromagnet of similar dimensions.
In order to enable guiding of a product carrier along a reversing wheel of a conveyor belt, wherein a magnetic element is then situated in that reversing wheel, the plate of magnetizable material preferably takes a flexible form so that it can follow the shape of the reversing wheel.
In a preferred embodiment of the system according to the present invention the product carrier is pressed against a conveyor using a strong permanent magnet and a following product carrier is pulled towards a preceding one by one or more plates or strips of magnetizable material in the product carrier.
In a further preferred embodiment a product carrier is provided with friction material on side walls thereof and such a product carrier is engaged on the sides by a laterally disposed conveyor.
The present invention further provides a system wherein products are pressed out of the product carriers into a co-travelling discharge belt.
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Bootsman Cornelis F. M.
De Bos Kuil Dré Roelf
De Gooyer Gerrit
Jochemsen Cornelis J.
Neutel Ronald W.
Dykema Gossett PLLC
EBM Techniek B.V.
Hess Douglas
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