Package making – Depositing articles and arranging material in preformed... – Guide or inserted form or support for article contents
Patent
1993-03-12
1995-05-16
Coan, James F.
Package making
Depositing articles and arranging material in preformed...
Guide or inserted form or support for article contents
53260, 53529, B65B 3524, B65B 2520, B65G 1514, B65G 2114
Patent
active
054149738
DESCRIPTION:
BRIEF SUMMARY
The invention concerns an apparatus for conveying a textile product from an upstream station to a downstream station, especially for delivery into a package, with an endless conveyor belt driven by a drive and with a pressure unit, the textile product being conveyed while held in a gripped manner between conveyor belt and pressure unit.
An apparatus of this kind has been operated by the applicant since 1989, under the designation BM 871.
In this known apparatus, a textile product, usually multiply folded or laid together, is conveyed from an upstream station in the form of a folding or laying apparatus to a downstream station, specifically a packing apparatus, and therein conveyed into a packaging pouch.
The textile product lies on a guide plate that is narrower than the width of the product being packaged, and also on two conveyor belts arranged at the same level immediately on either side of the guide plate. A pressure unit in the form of a pressure plate rests on the textile product so that the latter is held and guided while resting on the guide plate and the belts and while being held in a gripped manner by the pressure plate.
Moreover, the guide plate and the pressure plate can be moved relative to the stationary conveyor belts so that in the context of a linear advance motion the textile product is held in a gripped manner between guide plate and pressure plate, and can be inserted into a packaging pouch in the downstream station, configured as a packing unit. In the downstream station, it is then necessary for the textile product to come into contact with a retainer which immobilizes the textile product while the guide plate and pressure plate are pulled back, sliding along the retained textile product. Thus a relative motion occurs between the conveyed product and the conveying apparatus as it pulls back. To prevent damage to the product during this relative motion, the surfaces of the guide plate and pressure plate resting against the product must be very smooth. Furthermore, the pressure must not be so great that individual parts of the textile product are subjected to significantly higher friction than other parts during pullback. These differing friction values would then cause displacement of individual parts of the product during withdrawal, so that the latter is packed either unattractively or perhaps improperly. Such regions with differing friction values can be caused, for example, by seams, edges, sleeves, button rows, or simply by different materials on the textile product. For example, if the guide plate is pulled back over an end region of a shirt, a difference in friction value occurs between the sleeve of the shirt arm and the rest of the shirt product. This can then cause wrinkling and compression folds.
With synthetic materials, relative motion has the considerable disadvantage that electrostatic charging can occur, causing repulsive forces during the subsequent sealing process so that a reliable seal cannot be obtained.
A further disadvantage when the cycling rate is high is that the textile product arriving from the upstream station is delivered between the guide plate and pressure plate at relatively high speed, and is slowed therein to various degrees depending on the weight of the textile product, i.e. as a function of its inertia and surface finish, and therefore may possibly come to a stop at different points.
In the apparatus of the aforesaid type, insertion into the packaging pouch occurs in a manner such that the textile product, held in a gripped manner between the guide plate and pressure plate, is slid into the pouch. In this process, the leading end of the textile product must be brought to the rear, closed end of the packaging pouch. It must therefore be ensured that this leading end of the textile product comes to rest exactly at the level of the ends of the guide plate and pressure plate. As already mentioned, however, this is not always guaranteed. It has already been mentioned above that the pressure between guide plate and pressure plate must not be too great,
REFERENCES:
patent: 2693304 (1954-11-01), Davis et al.
patent: 3932982 (1976-01-01), Klapp
patent: 4464880 (1984-08-01), Peters et al.
patent: 4592193 (1986-06-01), Gustavsson
patent: 5022216 (1991-06-01), Muckenfuhs et al.
patent: 5123231 (1992-06-01), Fallas et al.
August Krempel Sohne GmbH & Co.
Coan James F.
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