EP0226972B1 - Process for erecting a package - Google Patents

Abstract

The blank for producing a package for an at least approximately circular part has a top wall, a bottom wall and two side walls. The top and bottom walls are essentially circular whereas the side walls are of rectangular shape, but have a length which is less than the diameter of the two other walls. At the transition to the side walls, the top and bottom walls are adapted to the shape of the side walls. Flaps are attached in the set-back portion thus formed, which flaps form the end faces of the package and extend at most slightly beyond these two walls. <IMAGE>

Description

The invention relates to a method for erecting a cardboard packaging or the like. for an at least approximately circular disc-shaped part, from a cut with an upper wall, a bottom wall and two side walls, which are connected to one another by means of an adhesive seam to form a tubular shell, with tabs being articulated on the two free edges of the top and bottom walls, which end closures Form packaging.

From FR-A-905 479 a folding box blank is known, from which a tubular envelope can be formed, which have tabs for forming end closures. However, this folding box blank is only suitable to a limited extent for packaging circular disc-shaped parts, since it cannot be adapted to it.

GB-A-728 324 shows a tubular wrapped packaging sleeve which is formed from a flexible packaging material, with no individual walls or tabs being provided.

The object of the invention is to provide a method for erecting a packaging made of cardboard, the packaging consists of a blank and can be erected and closed regardless of the design of its end walls.

This object is achieved according to the invention with a method of the type mentioned at the outset in that the blank, which is provided with tabs hinged to the free edges of the side walls and is equipped with a bottom wall consisting of two partially overlapping sections, is placed with its outside facing down on a shaping device, then the two side walls with the other free top or bottom wall parts molded onto them are bent upwards by 90 ° and these free wall parts are then folded back by 90 °, whereupon the part to be packaged is placed in the trough formed in this way and the free wall parts around Folded 180 ° to each other, with a longitudinal seam by applying hot melt or the like in the area of overlap of these free wall parts. is produced, whereupon the flaps hinged to the side walls are folded in and then the end walls are formed by unfolding and gluing the flaps hinged to the top and bottom walls.

In this way, such packaging can be erected, filled and closed in a simple and rational manner, regardless of the configuration of its end walls.

• Fig. 1 eine Ansicht eines flachliegenden Zuschnittes aus Karton mit einer Ober- und Bodenwand sowie zwei Seitenwänden,
• Fig. 2 eine aus dem Zuschnitt gemäß Fig. 1 aufgerichtete und gefüllte Verpackung,
• Fig. 3 eine Ansicht eines weiteren flachliegenden Zuschnittes und
• Fig. 4 ein schematisches Ablaufschema eines Verfahrens zum Aufrichten einer Verpackung.

The invention is illustrated in the drawing using two exemplary embodiments. Show:

• 1 is a view of a flat blank of cardboard with a top and bottom wall and two side walls,
• 2 shows a packaging erected and filled from the blank according to FIG. 1,
• Fig. 3 is a view of another flat blank and
• Fig. 4 is a schematic flow diagram of a method for erecting a package.

In Fig. 1, 1 denotes a flat blank made of cardboard, which contains an upper wall 2, two side walls 3 and 4 and a bottom wall 5 formed from two sections. All these walls are arranged in a row next to one another and connected to one another by articulation lines 6, 7, 8 and 9. Tabs 10, 11 and 12, 13 are hinged to the two free edges of the side walls 3 and 4, respectively. In addition, further tabs 22 to 29 are attached to the adjacent edges of the top wall 2 and bottom wall 5 via articulation lines 14 to 21.

The top wall 2 and the bottom wall 5 (after connecting the two sections) are essentially circular with the diameter D. The articulation lines 16 to 19 or 14, 15 and 20, 21 are tangential to the circumferential line of these circles and each meet the end point of the articulation lines 6, 7, 8 and 9, the length of which is somewhat smaller than the diameter D. The tabs 22 to 28 are bevelled on their outer edge 30 to 37, whereby all the tabs lie within an imaginary connecting line of the outer circumference of the top wall 2 and bottom wall 5.

The blank thus only has a width which results from the diameter D, which is determined in accordance with the part to be packaged.

2 shows a fully erected and filled packaging. The two sections of the bottom wall 5 are connected to one another with the aid of an adhesive seam K. Sections are formed on the end faces of this packaging, at which the packaging is open, as a result of which the packaged part 38 is visible.

A cardboard blank 41 shown in FIG. 3 also contains an upper wall 42, two side walls 3 and 4 and a bottom wall 45 formed from two sections. All these walls are arranged in a row next to one another and connected to one another by articulation lines 6, 7, 8 and 9 . Tabs 10, 11 and 12, 13 are articulated to the two free edges of the side walls 3 and 4, respectively. The top wall 42 and the bottom wall 45 are at least approximately circular in shape, the theoretical circumferential line being designated by U. Articulation lines 54 to 61 are located tangentially on this circumferential line, by means of which tabs 62 to 69 are fastened to the top and bottom walls. One end point of these articulation lines 54 to 61 coincides with the respective end point of articulation lines 6 to 9 and the other with the end point of the adjacent articulation lines. The outer edge 70 to 77 of the tabs 62 to 69 is chamfered again, so that these tabs protrude only slightly beyond the theoretical extent of the top or bottom wall.

The individual steps of a method for erecting such a packaging are shown schematically in FIG. 4. In step I, a cardboard blank is placed with its outside facing down on a device, not shown. In step II, the side walls with the hinged bottom wall sections are bent upwards by 90 degrees. This applies to packaging whose adhesive seam is arranged on the bottom.

It is of course also possible to provide the adhesive seam in the area of the top wall; in this case the upper wall sections are then bent upwards with the side walls.

In step III, the two bottom wall sections are folded back into the horizontal, while the two side walls remain vertical. The part to be packaged is then fed in step IV and lowered into the resulting depression of the pack. Step V involves folding the two bottom wall sections over one another, the inner of these two sections first being folded in and provided with hot melt in the overlap region, and then the outer section being folded over the first. In step VI, the two sections are pressed together in the overlap area and the adhesive seam is thus produced. The folding of the dust flaps provided in step VII is followed in step VIII by the folding down of the upper flaps for the formation of the end walls. In step IX, the corresponding lower tabs are provided with hotmelt and bent upwards against the already folded-in tabs, against which they are pressed in step X.

Steps I to VI are expediently carried out in a continuous process, while steps VII to X are provided in a discontinuous, i.e. cyclical, process. However, it is then also expedient to switch from one sequence on one path to two paths between steps VI and VII.

With such a method, such packaging can be erected extremely efficiently, regardless of the type of arrangement or the configuration of the end walls.

Claims (1)

1. Process for erecting a pack made from board or a similar material for an at least approximately round object from a blank (1,41) with a top panel (2), a base panel (5) and two side panels (3,4) which are joined together along a glued seam (K) to form a sleeve, where flaps (22 to 29) that form the end panel closures of the pack are hinged to the two free edges of the top and base panels (2,5), wherein the blank provided with flaps (10, 13) hinged to the free edges of the side panels (3,4) and with a base panel (5) consisting of two sections (5) that overlap to some extent is placed - with its outside surface downwards - on a forming unit, the two side panels with the further free top and base panel sections hinged to them are then folded upwards 90° and subsequently these free panel sections are folded back 90°, after which the object to be packaged is loaded in the pocket formed in this way and the free panel sections (5) are folded 180 ° on top of each other, a longitudinal seam (K) being produced in the area where these free panel sections (5) overlap by applying hotmelt or a similar agent, after which the flaps (10 to 13) hinged to the side panels (3,4) are folded in and then the end panels are formed by folding the flaps hinged to the top and base panels on top of each other and gluing them together.

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