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Packaging Bag with Tearing Aid

a technology of tearing aid and packaging bag, which is applied in the field of packaging bags, can solve the problems of difficult to implement in industrial mass production, the difficulty of starting the tear at the beginning of the weakened line, and the inability to tear in the desired region of most materials

Inactive Publication Date: 2009-03-19
JENOPTIK AUTOMATISIERUNGSTECHN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0022]Advantageous improvements are described in the subordinate claims.

Problems solved by technology

However, without a tearing aid, most materials do not always tear in the desired regions.
From practice, solutions are also known in which weakened lines are formed across the width of the front and / or back of the packaging bag, whereby a tear progression is indeed guided, but there is the difficulty of starting the tear at the beginning of the weakened line.
However, to implement this in industrial mass production is very difficult technically, because the two cannot take place in one process, where the opening notch must be positioned exactly relative to the weakened line.
No solutions have been presented that combine an opening notch in the edge region and a weakened line running across the width of a packaging bag.

Method used

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  • Packaging Bag with Tearing Aid
  • Packaging Bag with Tearing Aid
  • Packaging Bag with Tearing Aid

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0037]In FIG. 1a, a packaging bag according to the invention is shown in top plan view onto the front 1. The front 1 and the back 2, lying behind the front, have a rectangular shape and are connected to each other by means of a peripheral joint edge 3.

[0038]A blank 4 for this packaging bag, shown in FIG. 1b, is advantageously cut to length from a web of packaging material and has twice the width of the packaging bag. Through folding along the center line, the front 1 and the back 2 are placed so that one overlaps the other. The crease formed by the fold forms one of the two side edges. Connecting the other side edge and the bottom edge would be sufficient to create a packaging bag that can be filled. To achieve an overall symmetric impression or to be able to adequately grip the packaging bag peripherally, however, as a rule the edge region along the crease is also formed as a joint edge 3.

[0039]It is clear to someone skilled in the art that the blank 4 can also be shaped in such a ...

second embodiment

[0068]In a second embodiment shown in FIG. 2, the distance “a” is reduced in order to increase the reliability that an introduced tear actually intersects the weakened lines 6 and does not run away from these lines in an uncontrolled way. The intersection point 8 still lies within the joint edge 3. This has the effect that the guidance of the progressing tear still starts within the joint edge 3. Instead of an abrupt change in direction according to FIG. 1a, the line layout of the weakened line 6 has a continuous change in angle, due to the rounding of the angled line layout.

third embodiment

[0069]Like all of the embodiments described below, the third embodiment shown in FIG. 3 differs from the two aforementioned embodiments in that the opening notch 5 is not formed within the lower bag part 9, but instead within the upper bag part 10.

[0070]This has the advantage that a tear that progresses from the notch tip of the opening notch 5 intersects each of weakened lines 6 completely independently of the distance a.

[0071]In this third embodiment, the lateral edge regions are not formed as a joint edge 3, but instead are delimited exclusively by creases. Here, the packaging bag is closed across its length, as shown, on the back 2. The opening notch 5 is located in the joint edge 3 bordering the upper edge of the packaging bag.

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Abstract

The invention relates to a packaging bag with a tearing aid, with which it is reliably provided that the packaging bag is opened in a defined way by manual tearing by the user, so that no packaging contents are lost. The packaging bag is essentially made from a front and a back, which are connected to each other in their edge regions with a material fit and which thus forms a joint edge, in which an opening notch is formed, whose center line intersects two weakened lines at an intersection point starting at a distance from the notch tip. These weakened lines each extend across the width of the front and the back. The direction of the weakened line at the intersection point encloses, with the center line, a tear angle greater than 0° and less than 90°.

Description

FIELD OF THE INVENTION[0001]The invention relates to a packaging bag made from a flexible one-layer or multi-layer packaging material, such as, paper, plastic, and / or metal, with a tearing aid that allows defined tearing of the packaging bag.BACKGROUND OF THE INVENTION[0002]The necessity of defined tearing of a packaging bag, when such a bag is opened by manual tearing without the use of any tool, is especially important if the package contents involve such materials as liquid, bulk material, or a plurality of small parts, so that the packaging contents partially or completely escape as a result of uncontrolled opening of the packaging bag.[0003]The packaging size and the packaging material of packaging bags according to the class are defined as a function of the type and quantity of the package contents and can be very different. These packaging bags can indeed differ in shape, but, in the broadest sense, they always involve a packaging bag with a front and a back, which are connec...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65D65/26
CPCB65D75/5805B65D75/008
Inventor GRIEBEL, MARTINWITTENBECHER, WOLFGANG
Owner JENOPTIK AUTOMATISIERUNGSTECHN
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