Conveyors: power-driven – Conveyor system for arranging or rearranging stream of items – By longitudinally respacing successive articles in stream
Patent
1988-09-27
1990-06-19
Spar, Robert J.
Conveyors: power-driven
Conveyor system for arranging or rearranging stream of items
By longitudinally respacing successive articles in stream
1984643, 198570, 198718, B65G 4300
Patent
active
049345095
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for transferring products transported by an endless conveyor onto a receiving surface, said device comprising at least two pushers movable according to the direction of transport of the products on the conveyor, said pushers being respectively linked to two endless flexible members each forming a closed loop, and arranged for translational displacement while driving the pushers on at least one common rectilinear section.
It likewise relates to a method of using this device including at least two pushers movable according to the direction of transport of the products on the conveyor, said pushers being respectively linked to two endless flexible members each forming a closed loop, and arranged for translational displacement thereof while driving the pushers on at least one common rectilinear section.
Production lines and/or lines for conditioning products, notably for food products such as chocolate bars, coated product sticks or the like, often comprise one or several conveyors for bringing these products onto one or several receiving surfaces arranged to take up a series of these products for their transfer to a processing station, for example a packaging machine.
The passage from the conveyor for feeding to the receiving surface may be effected in different ways.
The first consists in projecting the products, that is to say, in utilizing the kinetic energy stored by the products transported by the conveyor to make them pass onto the receiving surface. This method is not suited to all products and often presents the drawback of disturbing the position of the products. The products delivered in rows are often misaligned.
The second method consists in driving the products by means of pushers which take up these products and guide them during their displacement. These pushers are in general associated with a transporter or an intermediate plate which stores the products at the exit of the conveyor before their transfer to the receiving surface. In practice, charging and discharging this intermediate transporter or this plate can not be effected simultaneously, so that a non-negligible loss of time is registered at the moment of passage of the products from the conveyor to the receiving surface, due to the fact that a series of products deposited on the intermediate support must first be discharged before a new series delivered by the conveyor may be deposited thereon. This constitutes a serious drawback because it causes a certain limitation of the speed on the line as a whole.
Moreover, one of the problems which arise in the case of conditioning lines is that of setting the pace of the individual products or rows of products. The products disposed for example on a conveyor belt must be positioned in such a manner that their relative spacing is regular. To this end, they must be decelerated or accelerated with respect to the band transporting them.
In certain installations, and for certain treated products, the problem is that of separating a group of products consisting of a fixed number of these products, from a set of products supplied in bulk by the conveyor. Such an installation is described in the French publication No. 2,259,750 and includes two circuits of synchronized registration arms which have the function of ensuring the separation and maintaining in place the groups composed for example of twelve boxes while they are set in place on a support brought by another way underneath these boxes.
This same problem of separating the products is illustrated by the British patent application published under No. 2,003,441 which descried an installation comprising two wheels with radial blades which act upon the products. In this case, the blades of the first wheel are synchronized with the rear of the products brought in contact with each other, and those of the second wheel have the object of accelerating the products so as to create a constant spacing between two successive products.
All of the known systems are applicable to rows of products in which the individ
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Bidwell James R.
SAPAL--Societe Anonyme des Plieusus Automatiques
Spar Robert J.
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