Package making – With means responsive to a sensed condition
Patent
1985-11-15
1987-04-28
Culver, Horace M.
Package making
With means responsive to a sensed condition
198347, 198572, B65B 5700
Patent
active
046603506
DESCRIPTION:
BRIEF SUMMARY
The invention concerns a device for synchronizing a series of packaging machines positioned along a chain conveyor, especially in the confections industry, that is intended for use when articles are to be packaged individually in one packaging machine and supplied to a downstream packaging machine for packaging as a set. The articles packaged individually in the first machine have always been assembled together on a conveyor belt and a specific quantity at a time supplied therefrom to the set-packaging machine by means of an inserter, with the throughput of the set-packaging machine depending on the capacity of the belt between the two machines and necessitating careful monitoring. This has a very deleterious effect on the throughputs of each machine. Furthermore, this method of processing can only be used with articles that collide on the belt and can withstand the resulting impact.
The object of the present invention is to eliminate this restriction and to provide a device for synchronizing a series of packaging machines positioned along a chain conveyor, especially in the confections industry, in which the synchronization of the series of machines is completely automatic and continuous, with the articles to be packaged subjected to no stress and without the operation of the packaging line being disrupted.
This object is attained in accordance with the invention in that a chain-and-pusher buffer is interposed in the chain-conveyor section connecting two of the packaging machines and carrying the pushers for the individually packaged articles and in that each packaging machine has its own chain-drive mechanism, both of which are connected to one set of electronic controls that carry out the synchronization.
The pushers for the articles to be packaged are positioned at intervals along the chain conveyor and are in accordance with the invention accommodated in a stationary channel that connects both packaging machines, the conveyor is allowed to form a sag between each pair of pushers in the vicinity of the channel, and there is a rotating mechanism, which drives the conveyor, at the outtake end of one packaging machine and at the intake end of the other packaging machine, both mechanisms being connected to the electronic controls that carry out the synchronization.
The sags in the chain conveyor, which travels with its pushers along the stationary channel, are preferably supported on a channel that parallels the conveyor and can be shifted transversely with respect to the stationary channel. The degree of sag in the conveyor and its arrival in the set-packaging machine can be varied in relation to operating conditions by raising or lowering the adjustable channel.
The rotating mechanism associated with the first packaging machine is controlled by a device that monitors the loading of the chain conveyor and synchronized with the rotating mechanism associated with the second packaging machine in such a way that both mechanisms contribute to advancing the conveyor, and the synchronization system regulates the throughput of the second machine appropriately when the speed of the first rotating mechanism changes.
The theory behind the invention allows for a very wide range of embodiments, one of which is illustrated in the attached drawings.
FIG. 1 is a schematic illustration of a packaging line consisting of a series of two packaging machines and
FIG. 2 is a larger scale detail illustrating how the chain conveyor operates.
Two packaging machines are positioned in series along a worm conveyor 6 as illustrated in FIG. 1. Machine A, the master, produces individually packaged articles 1 for assembly into packaging sets 2, each consisting for example of three individually packaged articles 1, each set to be introduced into a separate wrapper. This is the function of Machine B, the slave, which is a tubular-sacking machine that places three individually packaged articles 1 at a time for instance in a tubular sack of plastic sheet. The plastic sheet travels in a web 3 that is sealed between each pair of packaging sets
REFERENCES:
patent: 3797635 (1974-03-01), Boisen et al.
patent: 3814232 (1974-06-01), Eriksson
patent: 4507908 (1985-04-01), Seragnoli
patent: 4514963 (1985-05-01), Bruno
patent: 4570783 (1986-02-01), Newcom et al.
Culver Horace M.
Firma Otto Hansel GmbH
Fogiel Max
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