Fluent material handling – with receiver or receiver coacting mea – Processes – Bag filling
Patent
1987-09-24
1989-02-21
Schroeder, Werner H.
Fluent material handling, with receiver or receiver coacting mea
Processes
Bag filling
141 21, 141128, B65B 104, B65B 134
Patent
active
048056731
DESCRIPTION:
BRIEF SUMMARY
The invention pertains to a process for filling packaging containers, such as tubular bags or similar packages, with doses having a predetermined weight of a fluid, powdery or finely granulated filling material, the filling material being gravimetrically introduced into the packaging containers, and also pertains to a device for filling such containers, in accord with the process, with doses having a predetermined weight of a fluid, powdery or finely granulated filling material, the device having a speed-controlled, motor-driven delivery screw in a jacket pipe flanged to the discharge end of a supply container for the filling material according to the generic term of claims 1 and 3.
Up to now, it has been customary to measure out a predetermined amount of a fluid filling material and introduce it into packaging containers, particularly tubular bags, in two ways. The metering takes place volumetrically according to the one method and gravimetrically according to the second method.
The volumetric metering has the disadvantage of being extraordinarily inexact, which results in substantial weight differences with regard to the contents of the packages. Wherever greater accuracy in portioning the filling material is important, subsequent metering systems with cut-off scales are usually used; however, these can not be used for tubular bag packing machines, due to the connection of the packaging container to the packing machine. But these apparatus as well, which supposedly allow relatively high precision to be reached, reveal that in practice this is not sufficient after all, since the overfilling necessary due to the stipulations of the ordinance on finished packaging reaches a degree which leads to considerable losses for the filling company. This state of affairs is made clear in more detail by the example depicted below.
If, for instance, a package is supposed to contain 1,000 g of a filling material, then the amount of shortage conditioned by the filling may not exceed 15 g. As experience shows that the filling device works with a tolerance of .+-.20 g, on the average of all packages, a median minimum weight of 1,005 g of the amount dispensed arises. This means that the overfilling amounts to at least 5 g per package. If, for example, 1.2 million packages are produced in one year, then the overfilling amounts to at least 6,000 kg per year. Supposing that one kilogram costs 20.00 German marks, a loss of 120,000.00 German marks arises from the overfilling of only 5 g in a 1,000 g package.
The invention is based on the task of substantially improving the metering accuracy in the automatic dispensing of a certain amount of a fluid, powdery or finely granulated filling material, in order to reduce to a minimum the overfilling of the package conditioned by the system, which has been necessary up to now for reasons of tolerance and which can reach substantial proportions, while complying with the legal stipulations of the ordinance on finished packaging.
For the solution of this task it is proposed according to the invention, that in a process for filling packaging containers, a predetermined amount of filling material to be introduced into a packaging container is fed by means of a speed-controlled metering screw at intervals, gravimetrically regulated, from a first supply of filling material, and a measured amount of the filling material more or less equivalent to the amount dispensed is subsequently fed from a second filling material supply to the first filling material supply within a time corresponding to the stop period of the packing machine. It is contemplated as preferable, that delivery of the measured amount of filling material from the first supply takes place in two steps, with a greater portion of this amount being delivered at a higher conveying speed and the remaining amount at a substantially reduced conveying speed.
A further object realized by this invention is a novel device for filling packaging containers, such as tubular bags or the like, with doses having a predetermined weight of a powdery
REFERENCES:
patent: 4381545 (1983-04-01), Biddle, III et al.
Anselmino Claudio
Wohrle Ernst
Bayer AG
Carl Edelmann Verpackungstechnik GmbH
Schroeder Werner H.
LandOfFree
Process and device for dispensing predetermined doses having a p does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and device for dispensing predetermined doses having a p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and device for dispensing predetermined doses having a p will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1515911