EP2033904A1 - Paper sack for powdery bulk material - Google Patents

Abstract

The bag has a counter part of a hook and loop fastener attached to a carrier surface at an outer side of ends that are provided at an opening of the bag. The counter part of the hook and loop fastener is provided for reversibly and force-fittedly retaining another counter part of the hook and loop fastener. The counter part is glued at a carrier material of the bag with help of acrylate and/or natural rubber contact adhesive, riveted or clipped at the carrier material or is fastened at the carrier material. The carrier material is made of reinforced paper.

Description

Paper bags, and especially paper valve bags, are generally well known and are generally used for receiving, transporting and storing bulk materials, such as e.g. As cement, gypsum, animal feed or animal litter, but especially for fine-grained or powdery contents used. Usual sizes of such bags have a volume of 5, 10 but also 25 kg. Typical paper valve bags usually consist of a substantially rectangular bottom, a bottom opposite and substantially also rectangular top, a tubular paper bag body extending between the bottom and the top and possibly a cover sheet order. This cover sheet is applied to the outside of the upper part and may optionally be provided with a carrying handle or designed as such.

Typical of paper valve bags is a tubular valve mounted in the folded bottom. Paper valve bags are usually equipped with a folded bottom in the form of a cross or block bottom, with special bottom flaps grab on a corner impact. The mentioned tubular valve is fixed in a space formed by the corner hinge and the bottom flaps. The valve itself consists of a carrier material, which is folded in the bottom longitudinal direction, and has an upper and a lower side, which are connected by longitudinal fold lines.

In its closed state, the valve is due to the design flat in the ground until it is spread in the context of filling the paper bag from the bag outside usually through a filling tube and in this way allows the filling of the bag interior. The valve is closed by the Pressing filler of the bag against the bottom and thereby presses the valve bottom against the valve top. Due to the design, certain losses of the filling material by trickling or dusting can not be avoided, which is why it has been attempted to provide the support material of the valve with a weldable layer and in addition to weld the valve top with the valve bottom. After applying this additional layer, the valve can then be closed with hot air, but also ultrasound systems.

Furthermore, it is known to apply to the outer region of the top of a paper bag a cover sheet order that can be printed well and is suitable for the purpose of product and manufacturer information, but also for advertising purposes. It is also known to combine the cover sheet with a carrying handle, which can be done in particular by punching out of a cover sheet two parallel cuts, so that the user can form a handle for the paper bag from the welded cover sheet.

Since lately the handling comfort for the user of the contents is becoming increasingly important in the design of paper valve bags for particular fine-grained and powdery contents, several approaches have already been proposed for this purpose. The combined with the cover sheet and stamped therein handle (see above) is, for example, in DE 20 2006 006 436 U1 described. The flat glued cover sheet is in this case the sealing of the folding area of the paper valve bag end and also for receiving printed information and as a carrying handle.

The German patent application DE 40 21 801 A1 describes a bag or bag with a rectangular bottom in the filled state, which is formed by Eckeinschläge partially overlapping side impacts. In addition, this bag includes a glued or welded handle, which consists of a central web portion with the handle hole and connected thereto, the lateral thigh-like strip of a flexible material.

A carrying device for bags with mold bottom can be found in the German Utility Model G 81 15 909. In this variant, the cover sheet is T-shaped in cross-section and connected via its jointly covering the bottom surface T-side legs, with the mold bottom flat. In addition, the cover sheet with its T-center leg forms a projecting approximately in the median plane of the bottom free tab, with a formed in this handle opening.

Another German utility model, namely G 82 07 889 is a support device for paper bags with mold bottom refer to, consisting of a cover sheet with handle. This mechanically fillable and closable on all sides, as well as individually and manually manageable bag for bulk debris such as powder, granules, sludges and mixtures of these types of substances, consists of a blank of a thin and sheet-like single or multi-layer material such as paper or plastic. On the bag or on the described blank at least one carrying handle firmly connected to the bag material is arranged.

A disadvantage of the known systems described is a limited comfort, which occurs due to the design-related thin handles, especially for bags with high weight. In addition, the handles used tend to break off at the joints. In addition, the production of the described systems is structurally complex and therefore also expensive.

Based on the described prior art, the object of the present invention is to provide a paper bag for powdery filling material, which has a cost-carrying and handle variant. This new paper bag type is intended to facilitate the carrying and emptying of a particular fine-grained or powdery contents. In addition, the holding and handle variant should support the comfort and be as universally feasible.

This object has been achieved in that the paper bag has on the outside of the end provided for its opening at least one mounted on a support surface counterpart a) of a hook and loop fastener in a flat arrangement, which is suitable for reversibly receiving its corresponding counterpart b) of the hook and loop fastener.

Surprisingly, it was found that with this solution variant not only the task of the present invention could be fully satisfied, but that thus a system was created that can be used universally for paper bags for powdery products. Due to the simple construction and the handle, which is independent of the paper bag when not in use, the system can be used universally for numerous paper bag variants of variable size and variable contents. The handle system is limited to a few inexpensive parts and can be adapted to a variety of paper bag embodiments.

The term "Velcro" is understood according to the present invention, a textile and arbitrarily often to be solved closure means, which is based on the principle of Klettfrüchte. It consists in its typical embodiment of two compatible nylon strips, one of which is provided with Widerhäkchen and the other with loops. In compressed form, both strips provide a durable and detachable quick release.

Based on this definition, it has been found in the context of the present invention to be advantageous if the counterpart a) is a material strip with barbs or loops. Particular preference is given to a variant in which the counterpart a) is a hooked band, a looping band, a mushroom band or a suede band.

The use of these variants allows the adaptation to different paper bags with varying weight, since the load capacity and in particular the holding or carrying capacity of the frictional connection of the two counterparts of the hook and loop fastener and in particular depends on the number of individual connection units per unit area.

The present invention also encompasses a variant in which the counterpart a) is adhered to the carrier material of the paper bag, which is preferably carried out with the aid of an acrylate or rubber pressure-sensitive adhesive. Of course, mixtures of these adhesives may also have been used. The counterpart a) can also be riveted or clamped on the carrier material of the paper bag, wherein, of course, any desired mixture of these attachment options on the carrier material can also be advantageous in accordance with the invention.

The mentioned carrier material in the context of the present invention consists of reinforced paper. The reinforcement itself may be a paper, board and / or film layer. In this way, by combining the respectively suitable carrier material with the respectively most suitable reinforcing material, an excellent basis for the attachment of the counterpart a) can be created, which in turn can be provided with the counterpart a) most different paper bag variants.

The simplest system is that the carrier material is the closure end of the paper bag itself or its outer cover sheet. In this way, most commercial paper bags for the proposed subject invention are suitable.

As essential to the invention has already been stated that the counterpart a) for reversible and non-positive reception of its corresponding counterpart b) of the hook and loop fastener is suitable. In order to realize this principle, the present invention recommends a combination of a hook with a loop tape, a mushroom with a velor belt, a mushroom with a loop tape and / or a mushroom with a mushroom ribbon.

Another advantage of the claimed paper bag is that it by varying the respective hook and loop fastener and its associated Counterparts a) and b) is suitable for receiving a filling amount between 5 and 25 kg, preferably amounts between 7 and 20 kg and more preferably between 10 and 15 kg are suitable.

The described advantages are particularly clear when the paper bag is designed as a paper valve bag, which is also included in the present invention. Paper valve bags are the paper sack variants most used for powdery products.

The advantages over the described prior art also become apparent on paper sacks, which are particularly suitable for storing, transporting and emptying the contents located in them. The essential features of the invention are particularly useful when the paper bag is needed for filling, which is bulk material and in particular a dry mortar based on a hydraulic binder such as cement or gypsum.

For these reasons, the claimed paper bag can therefore also preferably be used for storing, transporting and emptying of powdered filling material and preferably of bulk material. In particular, during transport and / or emptying of the paper bag according to the present invention, the counterpart a) is reversibly and non-positively brought into contact with its corresponding counterpart b) of a hook and loop fastener and attached thereto support, pulling, receiving and Umsetzeinheiten.

The fact that the counterpart b) of the hook and loop fastener can of course be attached to a wide variety of carrier materials, additionally extends the advantages of the paper bag according to the invention. This carrier material may in fact be a handle device on the one hand, but also holding or hanging devices on the other hand. Thus, by combining the counterparts a) and b), the paper bag according to the invention can be provided with a holding or carrying handle, or else, for example, with an eyelet for attaching hooks. In this way, the transporting, moving, weighing but also emptying filled paper sacks is significantly simplified.

The present invention takes into account for the last-mentioned reason, a further variant in which the counterpart b) is attached to a carrying aid and in particular on a combination consisting of a flat unit whose one surface has the counterpart b) for attachment to the counterpart a) and the opposite surface has a handle. In question this is most easily a combination unit, which is a normal slicer, which has on its side facing away from the handle side, the counterpart b).

The variability of the proposed system is clear from the fact that in the last described case, the counterpart b) reversibly attached to the handle module and in particular plugged or clamped, whereby the slicer can continue to be used according to his intended proper function and only in case of need to carry, implement or emptying paper sacks according to the present invention.

Claims (17)

Paper bag for powdery filling material, characterized in that it comprises on the outside of the opening provided for its opening at least one mounted on a support surface counterpart a) of a hook and loop fastener in a flat arrangement, suitable for reversible and non-positive reception of its corresponding counterpart b) of the hook and loop fastener is. Paper bag according to claim 1, characterized in that it is the counterpart a) is a strip of material with barbs or loops. Paper bag according to one of claims 1 or 2, characterized in that it is the counterpart a) is a hook tape, a loop tape, a mushroom tape or a suede belt. Paper bag according to one of claims 1 to 3, characterized in that the counterpart a) is adhered to the carrier material of the paper bag, preferably with the aid of an acrylate and / or rubber pressure-sensitive adhesive, riveted or clamped on the carrier material or attached to the carrier material with a mixture of these mounting options , Paper bag according to one of claims 1 to 4, characterized in that the carrier material consists of reinforced paper. Paper bag according to claim 5, characterized in that it is in the reinforcement to a paper, cardboard and / or foil layer. Paper bag according to one of claims 1 to 6, characterized in that the carrier material is the closure end of the paper bag or its outer cover sheet. Paper bag according to claim 7, characterized in that the adhesion is effected by a combination of a hook with a loop tape, a mushroom with a velor belt, a mushroom with a loop tape and / or a mushroom with a mushroom ribbon. Paper bag according to one of claims 1 to 8, characterized in that it is suitable for receiving a filling amount between 5 and 25 kg, preferably between 7 and 20 kg and more preferably between 10 and 15 kg. Paper bag according to one of claims 1 to 9, characterized in that it is designed as a paper valve bag. Paper bag according to one of claims 1 to 10, characterized in that it is suitable for storing, transport and emptying of the contents located in it. Paper bag according to one of claims 1 to 11, characterized in that the filling material is bulk material and in particular a dry mortar based on a hydraulic binder such as cement or gypsum. Use of the paper bag according to one of claims 1 to 12, for storing, transporting and emptying of powdery filling material and preferably of bulk material. Use according to claim 13, characterized in that for transport and / or emptying, the counterpart a) is reversibly and non-positively brought into contact with the corresponding counterpart b) of a hook-and-loop fastener. Use according to one of claims 13 or 14, characterized in that the counterpart b) is mounted on a carrying aid and in particular on a combination consisting of a flat unit whose one surface has the counterpart b) and whose opposite surface has a handle. Use according to Claim 15, characterized in that the combination unit is a smoothing plane which has its counterpart b) on its surface facing away from the handle side. Use according to claim 16, characterized in that the counterpart b) reversibly mounted and in particular plugged or clamped.