EP1896243A1

EP1896243A1 - Container produced using an injection moulding method, and plastic film label to be over-moulded with a plastic material

Info

Publication number: EP1896243A1
Application number: EP06763829A
Authority: EP
Inventors: Alfons Schmunkamp
Original assignee: RPC Bramlage GmbH
Current assignee: RPC Bramlage GmbH
Priority date: 2005-06-23
Filing date: 2006-06-22
Publication date: 2008-03-12
Also published as: WO2006136592A1; DE102005029610A1; RU2008102373A; US20090136693A1; DE102005029610B4

Abstract

The invention relates to a container (1) which is produced using an injection moulding method and comprises an over-moulded label (2) applied to the outer side thereof, said label (2) comprising an overlapping section (5) located between a front edge (4) and a rear edge (3). The invention also relates to a plastic film label (2) which is to be over-moulded with a plastic material and comprises two edges suitable for the overlapping during the production. The aim of the invention is to improve one such container or label, especially in terms of the container, in such a way that a notch effect in the region of the label overlapping is counteracted. To this end, one of the edges (3, 4) comprises a plurality of recesses (7) in the extension direction of the overlapping (5), such that the edge (3, 4) alternates about a straight line (a - a) corresponding to the course of the overlapping (5).

Description

Produced by plastic injection process container as well as for injection molding provided by plastic plastic film label

The invention initially relates to a container produced in the plastic injection process with an externally attached, back-injected label, the label having an overlap between a front and a rear edge.

Containers of the type in question are known. These have a label which circulates on the outside in the manner of a banderole, which is back-injected by the container plastic material during the production of the container. It is thus created an in-mold label. The label is correspondingly permanently connected to the container. With thin-walled containers, however, there is the problem that the label overlap results in a reduction in the wall thickness, as a result of which a notch effect can be achieved along the overlapping edge edge. For larger side loads, this can result in a crack, which leads to further leaks.

With regard to the prior art described above, a technical problem of the invention is seen in such a way to design a container of the type in question so improved that a notch effect in the region of the label overlap is counteracted.

This problem is solved first and foremost by the subject matter of claim 1, wherein it is pointed out that in any case one of the marginal edges in the extension direction of the overlap has a plurality of formations, so that the marginal edge changes by a straight line corresponding to the course of the overlap. As a result of this refinement, the wall thickness reduction extending rectilinearly in the known state of the art is interrupted in its extent. Accordingly, no defined breakage results never, according to which a notch effect is counteracted with a concomitant danger of the formation of a crack under external stress. In any case, the proposed formations are provided on one of the overlapping marginal edges of the label. The marginal edge course is thereby extended compared to a direct straight, extending at an angle of 90 ° to the peripheral edges of the label extending edge. The formations are formed in the manner of - in the direction of extension of the original, not back-injected label considered - forward and / or recesses to an imaginary, originally rectilinear edge, so that between two edge portions defining material sections viewed in the extension direction of the peripheral edge in each case a material recess is placed. In the area of the material recess, the overlapping area of the other edge of the label is pressed in the course of the back-injection, according to which there is no doubling of the label thickness in this area. This can only be determined in the area adjacent to the material recess. Accordingly, alternate along an imaginary straight line, which runs parallel to a possibly otherwise existing existing rectilinear edge of the label sections with double and sections with simple label thickness. The container produced accordingly has along this line no continuous reduction in the wall thickness. The Behältniswandung is stabilized and can withstand particular lateral loads.

The subjects of the further claims are explained below in relation to the subject matter of claim 1, but may also be significant in their independent formulation.

Thus, it is provided in a development of the subject invention that both marginal edges have formations. In this case, a marginal edge can be waved. Next is also a serrated edge possible. Furthermore also further formations, such as in the manner of a sawtooth or rectangular profiling. In an embodiment in which both marginal edges of the label have such Ausforrrtungen, they can be designed the same. Alternatively, the formations of one marginal edge may be formed differently from the formations of the other marginal edge. Also, differently shaped formations can be provided over the length of the peripheral edge. The formations are in their extension - both in the extension direction of a parallel to an optionally existing straight edge extending straight line and in terms of extension perpendicular thereto - chosen so that a formation at her foot has a width which is one hundredth to one One half, one fiftieth, one twenty fifth, one fifth or one third of the width of the label in the region of the overlap. For example, in the case of a uniformly waved marginal edge, the shaping foot corresponds approximately to a wavelength, with the width of the label corresponding to the width of the label in the region of the overlap or with respect to the length of the imaginary line in an arrangement of, for example, 100 waves, one hundredth and in an arrangement of only two shafts of half the width. The extent transverse to the imaginary line (in the transmitted sense, the phase height in a wavy edge) corresponds to about one tenth to one hundredth, preferably one fortieth of the width of the label in the overlap, so on, for example, one twentieth, one thirtieth or also a fiftieth.

The invention further relates to a plastic film label provided for injection molding with two overlapping edge edges suitable for processing.

Plastic film labels of the type in question are known. These consist, for example, of polypropylene and serve for back-injection with a nem plastic material for the production of an in-mold label for a plastic container. Such labels are selected in length so that they include the outside of the container like a banderole, wherein further the marginal edges of the labels can overlap.

In order to further improve a plastic film label of the type in question, it is proposed that in any case one of the margins suitable for overlapping have several formations in the direction of extension, so that the marginal edge changes by a straight line corresponding to the course of a possible overlap. The marginal edge course is thereby extended compared to a direct straight-line edge, which extends at an angle of 90 ° to the extending in the longitudinal extent of the label marginal edges. The formations are formed in the manner of - in the longitudinal extent of the label considered - forward and / or recesses to an imaginary, originally straight-running edge, so that viewed between two edge portions defining material sections in the extension direction of the peripheral edge is placed in each case a material recess.

The subjects of further claims 7 to 10 are explained below in relation to the subject matter of claim 6, but may also be significant in their independent formulation.

Thus, in a further development of the subject invention, it is provided that both marginal edges have formations. Here, a marginal edge may be wavy. Next is also a serrated edge possible. In addition, other shapes, such as in the form of a sawtooth or rectangular profiling. In an embodiment in which both marginal edges of the label have such formations, they can be designed identically. Also differently shaped Ausformungen can be provided over the length of the peripheral edge. In addition, the formations are chosen so that these have at their feet a width which corresponds to one-hundredth to one-half of the width of the label in the area of the possible overlap, such as, for example, one eightieth, one fiftieth, one twenty-fifth, one fifth or one third. For example, in the case of a uniformly corrugated edge, the shaping foot corresponds to approximately one wavelength.

The invention is explained in more detail below with reference to the attached drawing, which represents only one exemplary embodiment. It shows:

Figure 1 shows a plastic injection-molded container with an externally mounted, back-injected label.

2 shows the enlarged section along the line II - II in Fig. 1.

Fig. 3 shows the enlarged section along the line III - III in Fig. 1;

FIG. 4 shows the enlargement of the region IV in FIG. 1; FIG.

5 shows the section along the line V - V in Fig. 4.

Fig. 6 shows the plastic film label in a detail view;

7 is the enlarged view of the area VII - VII in Fig. 6th

The container 1 shown in FIG. 1 is produced by a plastic injection molding process and has a label 2 applied on the outside and back-injected in the course of injection molding. It is accordingly an in-mold label. The label 2 is circumferentially arranged on the outside of the container 1 and inextricably linked to the back injection. Between a front edge 4 and a rear edge 3, the back-injected label 2 has an overlap 5 on.

The two marginal edges 3 and 4 are shaped differently. Thus, the front marginal edge 4 is formed in a straight line, including a right angle to the container bottom or cover lid parallel edges 6.

The rear edge 3, however, has formations 7, which are achieved by a corrugation.

As can be seen in particular from the detailed illustration in FIG. 4, the overlap 5 of the two marginal edges 3 and 4 is selected so that the rectilinear marginal edge 4 intersects the wavy formations 7 of the other marginal edge 3 in the trough 10, so that an overlap ie There is a doubling of the label thickness only in the area between two spaced wave troughs. This is achieved in that the peripheral edge 3 changes around an imaginary straight line a - a corresponding to the course 10 of the overlap 5, which encloses a 90 ° angle to the edge edges 6 which are parallel to the floor or cover.

In the region of the troughs 10 of the marginal edge 3 formed by the formations 7, this is positioned in the same plane as the rectilinear marginal edge 4 (see sectional illustration in FIG. This is achieved in the course of the back-injection of the label in that the plastic material injected into the cavity fills the regions of the troughs 10. On the other hand, in the region of the peaks 9, a doubling of the label thickness considered in the thickness direction of the container wall 8 can be observed (compare FIG. 3). Due to the selected edge edge formation, a uniform tapering of the container wall 8 extending over the width of the label 2 is counteracted in the overlapping region by doubling the label thickness. On the contrary, a change in the container wall thickness over this length section is provided in a more uniform manner in the illustrated embodiment (compare FIG. 5).

Alternatively, the arrangement can also be chosen so that the rectilinear edge 4 is covered by the label portion with the wavy edge 3, wherein the overlap is chosen so that the rectilinear edge 4, the wavy formations 7 of the peripheral edge in the troughs 10 cuts.

In the course of the back-injection of the label thus inserted into the cavity, the injected plastic material causes the overlapping of the wave troughs 10, the marginal edge 4 associated label sections in the region of the wave troughs 10 and thus in the plane of the formations 7 having label section. Consequently, in this case as well, a single layer of the back-injected label 2 is achieved in the region of the wave troughs 10.

The plastic film label 2 is shown in Fig. 6 in a single representation. This has, according to the application, a rectilinear edge edge 4 and a wavy edge edge 3 having formations 7.

Over the width b of the label 2 and the marginal edge 3 are uniformly distributed formations 7 are provided, each formation 7 includes a wave crest 9 and a trough 10. In its foot, measured from the point of reversal in a wave trough 10 to the point of reversal of the adjacent wave trough 10, each formation 7 has a width f which, in the illustrated embodiment, approximately one tenth of the width b of the label 2 corresponds. The vertically measured height h of each formation 7 - measured between the turning point of a wave trough 10 and the turning point of a wave crest 9 - is about one-fortieth of the label width b.

All disclosed features are essential to the invention. The disclosure of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application.

Claims

1. In plastic injection molding produced container (1) with an externally mounted, back-injected label (2), wherein the label (2) between see a front (4) and a rear edge (3) has an overlap (5), characterized characterized in that in any case one of the marginal edges (3, 4) in the direction of extent of the overlap (5) has a plurality of formations (7), so that the marginal edge (3, 4) extends around a straight line corresponding to the course of the overlap (5) (a). a) changes.

2. Container according to claim 1 or in particular according thereto, characterized in that both marginal edges (3, 4) have formations (7).

3. Container according to one or more of the preceding claims or in particular according thereto, characterized in that the peripheral edge (3, 4) is corrugated.

4. Container according to one or more of the preceding claims or in particular according thereto, characterized in that the peripheral edge (3, 4) is serrated.

5. Container according to one or more of the preceding claims or in particular according thereto, characterized in that a molding (7) at its foot has a width (f) which is one-hundredth to one-half of the width (b) of the label (2) in Range of overlap (5) corresponds.

6. For injection molding provided by plastic plastic film label (2) with two in the processing for overlapping suitable marginal edges (3, 4), characterized in that in any case one of the Overlapping suitable marginal edges (3, 4) in their direction of extension a plurality of formations (7), so that the peripheral edge (3, 4) to a curve of a possible overlap corresponding straight line (a - a) changes.

7. Label according to claim 6 or in particular according thereto, characterized in that both edge edges (3, 4) have formations (T).

8. Label according to one or more of claims 6 or 7 or in particular according thereto, characterized in that the peripheral edge (3, 4) is corrugated.

9. Label according to one or more of claims 6 to 8 or in particular according thereto, characterized in that the peripheral edge (3, 4) is serrated.

10. Label according to one or more of claims 6 to 9 or in particular according thereto, characterized in that a molding (7) at its foot has a width (f) which is one hundredth to one half of the width (b) of the label in the area corresponds to the possible overlap.