DE69936205T2 - EASY TO OPEN BAG - Google Patents

Abstract

A plastic bag (200) includes a mouth which is covered by a closure flap (205). The closure flap (205) may be peeled back in order to open the bag, without damaging the wall of the bag in or at which the mouth is formed. The closure flap (205) is preferably attached to the bag (200) by means of a peelable adhesive (215) and preferably includes lines of weakness (216) along which the closure flap (205) may be torn. Variations of the bag include a base portion which includes a flat area on which the bag may stand stably.

Description

The The present invention relates to bags or sacks, and more particularly to plastic bags or plastic bags with an improved easy-to-open construction. The invention additionally such bags or sacks, which can stand stable and self-supporting.

The Bags of the present invention may be of any suitable size, of relatively small bags low (for example, about 1 liter capacity or less) up to large bags and are extremely useful for uses in industrial processes on a factory site and between factory premises or for the transport of food between factory premises and Retail space for example, especially for the food processing industry. The bags of the invention can also as outer packaging for certain solid and liquid consumer goods (such as detergents). The bags can too apply to home delivery services, especially if it is sometimes it is necessary to return products by post to a supplier.

various Types of plastic bags are known, but it is a special one Problem is to provide pouches that are easy to open Have closure, light and relatively economical to produce, easy and safe to handle and suitable for some uses are relatively heavy To pick up materials. The present invention is directed to to provide a bag with a closure containing these meet requirements can. The present invention is further directed to a bag available to put in addition can stand upright and stable on a surface, in particular if he contains a product, which may be a relatively heavy product for certain uses.

The Pouches of the present invention are particularly good for containment of bulk materials in the form of powders, granules or liquids suitable. examples for Such products are bulk chemicals and bulk ingredients, as they are such as in food and feed and in household products such as Washing powder and washing liquids used, as well as foods, such as prepared or partly prepared foods, and other household products Garden products such as peat or compost. In the food industry come plastic bags and sacks especially when transporting food, ingredients or partially Prepared food in or between establishments Commitment. In the context of this description, "bulk" may include consumer goods that retailers, such as liquid and solid detergents, Dry foods, food ingredients and prepared foods, for the the bags of the invention, the outer packaging can form. The amount of bulk material, for their Accommodating the bag is appropriate, depending on the particular use be different and is for example in prepared foods maybe not very big.

The The present invention further relates to bags or sacks and in particular plastic bags or plastic bags that are stable on one area can stand, if they are solid or liquid Product, especially a relatively heavy product included.

DE U 90 03 401.5 describes a container for sanitary articles comprising opposed walls and a peelable flap covering a mouth for dispensing the articles.

DE U 297 19 685 describes a package for receiving bag tea, which includes a resealable flap.

WO 98/18674 describes pouches for receiving granular material comprising a flat base.

Accordingly, in a first aspect, the present invention provides a plastic bag for transporting and storing powdered or granular bulk or pourable food ingredients, the bag having an open end and a closed end and comprising:
first and second side walls which together form a bag portion with front and back;
an orifice for access to the interior of the bag in use;
a closure flap which overlies and closes the mouth and which encloses an area peelably secured to the front face such that at least a portion of the closure flap can be pulled from the front over the peelably secured area to release the mouth; the front remains functionally intact;
characterized in that:
the closure flap is formed separately from the first and second side walls and the mouth is different from the open end;
the peelably secured region comprises at least one adhesive surface which extends without interruption from one lateral edge of the closure flap to the other, thereby sealing the mouth against leakage of the bag contents, and in that the bag further comprises:
a closable area near the open end of the bag and distinct from the mouth and peelable portion of the closure flap, and wherein in the closable area the open end of the bag is sealable by the user after a content has been introduced through the open end; the heat sealable surfaces are free from any adhesive.

An alternative second aspect of the invention provides a plastic bag for transporting and storing powdered or granular bulk material or pourable food ingredients, the bag having an open end and a closed end and comprising:
first and second side walls which together form a bag portion with front and back;
an orifice for access to the interior of the bag in use;
a flap that lies over the mouth and closes it,
characterized in that:
the mouth is different from the open end;
the closure flap is formed separately from the first and second side walls and comprises an area with at least one adhesive surface with which the closure flap is fastened to the front and which extends without interruption from one lateral edge of the closure flap to the other, thereby closing the mouth against Sealing leakage of the bag contents, the flap including at least one line of weakness defining a portion of the flap which does not include a portion of the front-mounted portion and which portion may be opened by tearing along the line of weakness to release the mouth of the bag;
and in that the bag further comprises:
a closable area near the open end of the bag and distinct from the mouth and tear-open portion of the flap, whereby, by means of the closable area, the open end of the bag is sealable by the user after a content has flowed through the open end; the bag has been introduced and wherein the heat sealable surfaces are free of any adhesive.

In a preferred embodiment these aspects of the invention forms the first side wall Front and the second side wall the back of the bag, point the side walls are substantially the same length, the estuary exists from a slot formed in the front and includes the lockable Area end portions of the first and second side walls.

In a modification of this embodiment The front side includes another line of weakness that tore can be to the estuary to build.

In In preferred arrangements, the closable area further comprises one End part of the flap.

Therefore Can the lockable Area end portions of the first and second side walls comprise. These end parts can for example, hot sealed Be sure to put the bag after filling to close. In some embodiments, the lockable area may further include a End part of the flap cover, which then also part of the heat seal (or other closure means) can form.

at a further preferred embodiment these aspects of the invention forms the first side wall Front and the second side wall the back of the bag, points the second side wall over the bag section protruding extension, the flap is located above a Part of the first side wall and the extension of the second side wall and includes the lockable Area the extension the second side wall and an end portion of the shutter.

at this embodiment the mouth is preferably bounded by the end edge of the first side wall and this end edge is released when the shutter is removed and thereby allows access to the interior of the bag.

In a further variant comprises the bag according to the invention Further, a second flap, which by a fold from an edge of the muzzle suspended and extends into the interior of the bag. The second flap Optionally with an adhesive on the inside of the second Sidewall be fastened. Desirably, the Adhesive a peelable adhesive.

In addition, will preferred that according to the first Aspect of the invention, a path along the first side wall in Substantially parallel to and adjacent to the mouth completely in a detachably secured area, at least within the peelable portion of the flap. These embodiments guarantee, that about the entire width of the peelable area an unbroken Seal (using the peelable adhesive) is present, so that, for example, no way exists on the powder or liquid product through the easy-to-open Closure can escape.

At the Using the bags of the invention it is advantageous if the bags while and after filling stable and self-supporting. Accordingly, at a very preferred embodiment the invention provides that the bag further comprises a base portion includes, on which the bag can stand stably when it is a product contains.

Preferably, the base section comprises:
a bottom wall connected along its opposite sides by first folds to the first and second side walls, respectively, the wall further having a second fold whose extension coincides with the width of the side walls and which is substantially parallel to the first folds the second fold divides the bottom wall into a first and a second wall wing so that the second fold and the wall wings lie between the side walls and the outer sides of the wall wings face each other and
Mitred gaskets having a sealing line extending from each end of the second fold to each first fold, wherein the first and the second side wall are respectively connected to the bottom wall along these sealing lines.

The Miter seals form mitred corners, if necessary are removable to improve the palletization of the bag, but this is not essential. That is, the bags of the present embodiment may need for the Transport on a pallet and be suitable for holding the Pouches on the pallet will be multiple bags containing a pallet load make, often welded on the pallet (or wrapped in some other way). In the case of prior art bags (without a stable, flat Base), if no gaskets are present, the in the bag contained contents fill the bag into the corners. This will make the corners stiff and pointed, so they tend to slide and / or adjacent To cut or rip open the bag. Therefore have some bags according to the prior art (without the design of a flat Base according to the present embodiment) At the corners mitred gaskets on to prevent that filling reaches into the corners. That way, the corners, although they are still pointed, flexible and less inclined in addition, damage cause. In the present embodiment, the seals are mitred part of the flat, stable base, but they can also serve the corners for to make an improved palletizing more flexible. The removal Miter corners can further improve palletizing but not essential. When the bags of this embodiment the outer packaging of consumer goods can form the mitred corners are removed accordingly to sharp corners, which disturb the consumer, to avoid and therefore the bags on the shelves of shops and Supermarkets lighter can be stacked.

In In an alternative embodiment, the base section comprises a generally rectangular bottom wall with opposite lateral edges and opposite end edges and generally triangular sections of the end wall, the each along a base side of the bottom wall of their respective Hang down the end edge, wherein the bottom wall with the respective first and second side wall over the connected to first folds which coincide with the respective lateral edges, the triangular sections of the end wall forming a vertex have over use the bottom wall is positioned, and have lateral edges with sealing lines, which is located between the vertex and the respective corners of the Base portion along and along which the first and the second Sidewall connected respectively to the sections of the end wall are.

Either in the former as well as in the latter embodiment the bottom wall is preferably, but not necessarily, integral with formed the first side walls.

Either in the former as well as in the latter embodiment according to this embodiment include the sealing lines (miter seals) preferably a heat weld.

Desirably forms the sealing line of the gaskets (as in the former Design defined) with the second fold an angle between 30 ° and 60 ° and In particular, the sealing line of the seals miter forms with the second fold an angle of 45 °.

at Embodiments of the bag in which no need for a stable base, the bag can be designed in such a way that he also at one of the easy-open closure and the lockable To open the area separate end of the bag. In this embodiment is the closed end of the bag provided with a third flap, the above the first or second side wall is located and removable at this is fixed, the third flap at the end of the bag, which is spaced from the open end, from the second or first Sidewall hangs down.

According to the second aspect of the invention, it is preferred that the closure flap comprises at least two lines of weakness, along wel This section can be opened by tearing.

According to the first Aspect of the invention is the peelable portion of the flap preferably delimited by at least one line of weakness, along which the flap is torn to the mouth of the Bag release.

Preferably the peelable portion of the flap is limited by two lines of weakness. Preferably, the lines of weakness extend from an end edge the closure flap, which is spaced from the closable area is, to points near the estuary.

Preferably is the line of weakness or pass the lines of weakness from perforations formed in the closure flap. Alternatively, the weakening lines Include lines where the material of the flap is thinned, or scribe lines in the material of the flap.

In another variant ends the lines of weakness in one or a plurality of finger recesses formed in the closure flap, through which open the door can be grasped. This configuration facilitates the opening of the Bag.

In a further variant of the first or second aspect of the invention the closure flap comprises a weakening line in the form of a circular arc, extending from points on the flap close to the mouth an end edge of the flap extends.

Around the opening of the bag, the bag preferably comprises in this case at least one at the above line of weakness in the closure flap formed finger recess through which the flap to Ripped open can be. Alternatively, a tab on a similar Be attached with the tab detected with the fingers can be tearing up to start. A permanent glue line can be between the end edge the flap and the line of weakness or the lines of weakness provided to help to open the flap opening the To hold bag.

Other possible embodiments for the weakening lines and the closure flap include the following:
The lines of weakness may be substantially straight and substantially parallel to the edges of the bag; or
the ends of the lines of weakness at the end edge of the flap are more widely spaced than the ends of the lines of weakness near the mouth; or
the ends of the lines of weakness at the end edge of the closure flap are spaced so as to define a finger tab through which the closure flap can be torn open; and or
the flap is sealed to the front along portions of its end edge extending from the respective lines of weakness to the sides of the bag.

In a particularly preferred embodiment is the line of weakness or are the lines of weakness shaped so that its limited section of the flap the shape of a dispenser nozzle assumes if it is along the line of weakness or lines of weakness is torn open.

According to the first Aspect of the invention is the peelable portion of the flap preferably by a peelable adhesive on the front attached. A hot melt adhesive is particularly preferred. Alternatively, the peelable section the flap by a peelable heat seal or a peelable, heat-sealed Area to be attached to the front.

To the close of the bag after filling includes the plastic bag according to the invention a closable area formed adjacent the open end of the bag. This configuration allows the bag from the same end, like the easy-open one Section to fill and this end after filling to seal. Also can This further advantageous embodiments at the other end of the Beutels are formed, in particular embodiments, a filling of the Do not allow Bag from this other end. The lockable area can be closed by any suitable means. Examples of suitable Means for closing of the lockable Area are heat sealing, Adhesive (e.g., a first with a removable protective tape coated adhesive layer) and Snap fasteners, such as those that run along the width of the lockable Extend area and on one side a plug-in part and on the other comprise a receiving part, wherein the parts to a Lock be locked together.

Handles for carrying the bag may be formed in or near (eg, just above) the closable area, for example, by cutting, punching, or by making suitable holes through other shapes in the first and second side walls, the extensions tion of the second side wall or the closure flap (as appropriate for the particular embodiment). Alternatively, separate handles may be attached to or near the closable area.

To the better understanding of the invention and to show how they are put into use can now (merely by way of example) reference to the following Drawings in which:

1 a schematic perspective view of the bag according to a variant of the invention;

2 a sectional view taken along the line AA of 1 is;

3 Figure 3 is a schematic plan view of a bag according to another variant of the invention, showing a line of weakness in the closure flap;

4 Figure 12 is a schematic plan view of a bag according to another variant of the invention, showing two lines of weakness in the closure flap;

5 a schematic plan view of a bag according to another variant of the invention;

6 a schematic plan view of a bag according to another variant of the invention;

7 a section along the line DD of 6 is;

8th a section along the line BB of 6 is;

9 a top view of the bag of 5 is in an open state;

10 a top view of the bag of 6 is in an open state;

11 a schematic plan view of a bag according to another, sealable at both ends of the invention variant is;

12 a sectional view taken along the line EE of 11 is;

13 Fig. 12 is a schematic plan view of part of a bag according to another embodiment of the invention;

14 a section along the line AA the 13 is;

15 a view of a portion of a bag according to 13 in an open state;

16 is a schematic plan view of a bag according to the invention, in which the embodiment of the base of 13 to 15 is included;

17a a section along the line FF the 16 is;

the 17b and 17c Variants of the bag of 16 and 17a demonstrate;

18 is a schematic plan view of a bag according to the invention, similar to the bag of 16 is designed;

the 19 to 22 Represent process for the preparation of bags according to the invention;

23 Figure 3 is a schematic plan view of a bag according to the invention, in which the mouth does not adjoin one end of the bag; and

24 a method of making the bag of 23 represents.

In of the present application are the bags of the invention, when nothing else is stated or the context requires something different, based on its flatness Condition before filling described and defined. The bags are therefore in a configuration described and defined, in which the side walls flat against each other lie and there is essentially no cavity between them is. If the bag with contents filled the side walls are obviously separated and the Configuration of the bag is changed.

The 1 to 12 show bags of an embodiment in which the base portion for a stable stand is not needed. In these figures, the bag comprises 200 a bag section 200A and a flap 205 , The bag section 200A is with a first side wall 201 and a second side wall 202 educated. The walls 201 and 202 are opposed by being superimposed, and in these embodiments, the side walls are 201 . 202 of equal length. The walls 201 . 202 are along their side edges 203 . 204 for example, joined together by heat seals (the heat seals along the lateral edges 203 and 204 are not specifically shown for the sake of clarity). In an alternative embodiment, the walls of the bag may be formed as a tube, so that along their sides no separate Verbin seam or a separate closure is present.

The flap 205 lies above an end region of the first side wall 201 and in these embodiments depends on the end edge 206 the second side wall 202 from the second side wall 202 down. The flap 205 can be attached by means of a connecting seam on the second side wall, preferably, the flap 205 in these embodiments, however, integral with the second side wall 202 formed and depends on the second side wall 202 by means of a fold 207 down. It can be seen that the fold 207 then adjacent and substantially parallel to the end edge 209 the first side wall 201 runs. (In the 2 . 7 . 8th and 12 is the distance between the first side wall 201 and the second side wall 202 and the flap 205 for the sake of clarity, exaggerated). The end edge 209 limits the mouth of the bag 200 when the bag is opened. An optional second flap 208 that are in the interior 211 of the bag 200 extends is at the end edge 209 the first side wall (ie at the edge of the mouth) by means of a Randfalzes 210 appropriate. The end edge 222 the second flap 208 is in the 5 and 6 represented by a dashed line.

The flap 205 is provided by means of a peelable area or removable areas 215 on the first side wall 201 adhered. The removable fastened area 215 may take a variety of forms, but preferably comprises a peelable adhesive, and more preferably a hot melt adhesive. The peelable adhesive may be applied either to the surface of the first side wall 201 or on the surface of the flap 205 or applied to both surfaces. Other examples of peelable adhesives may include a pressure-sensitive adhesive comprising two non-adhesive components, the first of which is applied to the closure flap and the second to the first side wall. When the two components are brought together and pressurized, an adhesive bond is created. Alternatively, the peelable adhesive may be a permanent adhesive or a peelable adhesive or a solvent adhesive applied either to the surface of the first sidewall 201 or on the surface of the flap 205 or applied to both surfaces.

The area or areas with removable adhesive 215 can take a number of different suitable forms. For example, the area 215 the entire under the flap 205 lying surface of the first side wall 201 or only part of this area. Peelable adhesive areas may be configured as adhesive tapes or adhesive strips that extend laterally or diagonally or in curved (undulating) paths across the first side wall. The areas of peelable adhesive over the first side wall may also be interrupted.

It is preferred that the area or regions of peelable adhesive be / are formed such that it is not possible to make a path along the surface of the first sidewall 201 from its end edge 209 (ie from the mouth) to the edge of the flap 213 (ie, the edge spaced from the mouth) without this path crossing an area of peelable adhesive. As will be described later, when only a portion of the shutter is peeled off, the above-mentioned path may be formed only in this portion.

It is particularly preferred that a contiguous area of peelable adhesive be substantially parallel to and adjacent to the end marginal edge 209 the first side wall 201 (ie adjacent to the mouth) is present, as in particular in 5 you can see. This design helps to ensure the integrity of the closure.

The area or areas with removable adhesive 215 can also be resealable, so that the bag after opening by means of the area or areas with peelable adhesive 215 can be resealed.

For example, the transfer of permanent adhesive, releasable adhesive, hot melt adhesive, or solvent adhesive may be applied to either the surface of the first sidewall 201 or on the surface of the flap 205 or applied to both surfaces, even after opening the bag, allowing the bag to be resealed.

Alternative embodiments of the peelable fixed area 215 also include the use of special adhesives whose adhesive properties are variable depending on the ambient temperature, whereby the bags can be used at extreme temperatures. In some cases, these adhesives may not be strippable at room temperature.

Alternative embodiments of the peelable fixed area 215 also include the use of separable adhesives.

Alternative embodiments of the peelable fixed area 215 include peelable welded and peelable heat-sealed areas. In order to provide a peelable heat seal or a peelable heat seal, it may be necessary to at least partially mitigate the strength of the weld or seal. This can be achieved by providing a kind of contamination between the materials to be welded or sealed. The contaminant may be selected from a variety of materials, but examples include inks and varnishes or a third film layer which is less strongly welded to the sheets of material than the materials together.

Especially with reference to the 1 and 2 The bag shown can be opened simply by the flap 205 over the entire removable areas 215 is deducted to the mouth 221 release. In this and other embodiments of the invention where peelable adhesive is used, the adhesive is chosen so that its cohesive strength is less than its adhesive strength. In the embodiment of the 1 and 2 Therefore, the flap is from the first side wall 201 in the peelable area 215 largely without damaging the flap 205 or the first side wall 201 separated by placing at its front edge 213 recorded and deducted. Accordingly, neither the shutter will 205 still the first side wall 201 torn and although both may be slightly deformed, any deformation of the first side wall 201 not essential in terms of their function.

In this and other embodiments, the optional second flap carries 208 to maintain the integrity of the closure when the bag 200 is grooved with its contents. The second flap 208 Effectively prevents excessive penetration of the bag contents between the first side wall 201 and the flap 205 around the area of the first fold 207 around, which otherwise leads to deformation of the side wall 201 and / or the flap 205 could lead them into the peelable area 215 could be separated. The closure of the bag could then be overcome, causing the contents to escape or spill.

In particularly preferred variants of the invention, the closure flap 205 one or more lines of weakness along which the flap 205 can be torn open to open the bag and release its interior. The lines of weakness are preferably as perforations in the closure flap 205 educated.

It will now be on the 3 and 4 Reference is made, in which a bag is shown, which comprises only one line of weakness. The line of weakness 216 is in the form of a circular arc, starting from the points WW near the mouth and the first fold 207 through the peelable fixed area 215 to the edge 213 the flap 205 runs. The line of weakness 216 limits a section 219 the flap, which is used to open the bag and along the line of weakness 216 can be torn up. Preferably, the ends of the weakening line extend 216 not above the peelable area 215 out to the mouth to maintain the integrity of the closure and to prevent the contents from leaking.

To facilitate the opening of the bag, the in 4 illustrated embodiment a finger recess 250 through which the flap 205 can be detected to rupture along the line of weakness 216 to start. Alternatively, a tab may be attached to a similar location, which tab may be grasped with fingers to begin rupturing. As in 4 can be shown, a permanent adhesive line 240 between the end edge 213 the flap and the line of weakness or the lines of weakness 216 be provided to help the closure flap 205 before opening the bag 200 to keep.

In one to the in 4 illustrated alternative embodiment of the invention, it may be desirable to use adhesive in the line of weakness 216 limited area of the flap to dispense. In this case, the flap must 205 in the area outside the section 219 to the first side wall 201 be sealed (such as a non-removable adhesive or heat seal) to ensure the necessary closure. This can be done, for example, by the permanent adhesive line 240 and seals at the side edges 205A . 205B be achieved.

It will now be on the 5 to 10 Reference is made in which variants of the bag of the invention are shown, in which the bag has two lines of weakness 216A . 216B include a section 219 limit the flap, which can be pulled off along the lines of weakness to open the bag. Additional features that may be incorporated into other embodiments of the invention are also shown. The flap can 205 to the first side wall 201 at the end edge 213 and at their lateral edges 205A . 205B ( 5 ) through the seals 212A . 212B ( 6 ), but these seals are not always essential are. The seals 212A and 212B are preferably heat seals, although adhesive seals utilizing permanent adhesive or peelable adhesive may also be used. Mitred seals 217 may be formed over the corners of the bag, preferably by heat sealing. The seals mitred 217 For example, when the bag is filled with contents, softer corners may form on the bag, which is preferred for palletizing the bags. The over the seals mitred 217 protruding corners of the bag are removable if desired.

The in the 5 and 6 through the dashed lines 216A . 216B indicated weakening lines extend from the end edge 213 the flap through the adhesive area 215 , Preferably, the lines of weakness extend 216A . 216B not above the peelable area 215 out to the mouth and the fold 207 To maintain the integrity of the closure and to prevent the contents from leaking.

If it is desired to empty the contents from the bag, the bag is opened by the flap 205 captured in the appropriate place and the shutter 205 or its section 219 is deducted. Especially in the 5 and 6 when the end edge 213 the flap 205 at section 219 is detected and removed, tears the flap 205 along the lines of weakness 216A . 216B and the section 219 is from the remaining parts 220 the flap 205 separated. Especially if, as in 6 , the end edge 213 the flap 205 through the seals 212A and 212B to the first side wall 201 is sealed, the unsealed portion works 214 as a finger tab, with which the flap 205 can be detected. The section 219 can then by tearing along the lines of weakness 216A . 216B are separated into the peelable area so that the bag has the open configuration as shown in Figs 9 and 10 represented, attained, in which the mouth 221 is released.

As in the above embodiments, the peelable adhesive is selected so that its cohesive strength is lower than its adhesive strength, so that (referring to the embodiment of FIGS 3 to 12 ) while the section 219 is deducted further, the section 219 from the first side wall 201 in the peelable area 215 largely without damaging the section 219 or the first side wall 201 is disconnected. The first side wall 201 and the section 219 so they are not torn open (except along the lines of weakness 216 . 216A . 216B ) or substantially deformed and the first side wall 201 remains functionally intact. When the lines of weakness have been torn along their full length, the section may 219 be unfolded (eg at the fold 207 ), so that it can act as a dispenser nozzle for bag contents, passing through the mouth 221 through which is distributed between the first side wall 201 and the second side wall 202 is formed, as from the 9 and 10 is best recognizable. In the 9 and 10 were various features, such as the gaskets 217 and the adhesive area (s) 215 , omitted for clarity.

As can be seen in particular from the 9 and 10 yields, is the muzzle 221 through which after opening the flap 205 Contents from the bag 200 can be distributed, limited by the end edge or part of the end edge 209 the first side wall 201 in combination with the inside of the second side wall 202 ,

Other embodiments of the mouth 221 are possible. Therefore, the mouth can 221 as a slot in the first side wall 201 be formed, wherein the slot preferably near the end edge 209 is arranged (but does not necessarily have to be arranged). The flap 205 then passes over the slot and is pulled off over a peelable area to release the slot. In this embodiment, the flap must 205 not necessarily from the second side wall 202 but may, for example, comprise a portion extending beyond the slit (in the direction of tearing open of the flap) which adheres permanently to the first side wall. In this latter embodiment, alternative means are needed to close the end of the bag beyond the slot. Such means may comprise the lockable region described with respect to subsequent embodiments of the invention.

In the 3 to 10 , the outside of the peelable section 219 lying section of the flap 205 on the first side wall 201 by non-peelable means such as, for example, a non-peelable heat seal or a non-peelable adhesive.

The second flap 208 can also be used as a means to reclose the bag after opening. In particular, the second flap 208 be provided with an adhesive layer (not shown) which can be used to the second flap 208 to the inside of the first side wall 202 to stick. According to the intended use of the bag can on the second flap 208 applied Adhesive removable or permanent (not removable). A peelable adhesive may be used to provide an even more secure closure for the bag prior to opening. Particularly preferred may be the second flap 208 applied (peelable or non-removable) adhesive first with a protective tape, such as a plastic or a coated paper, be coated. The protective tape prevents the glue from the second flap 208 to the second side wall 202 adheres. If it is desired to reclose the bag, the protective tape is simply peeled off to expose the adhesive, which is then on the second side wall 202 can stick. This latter embodiment is particularly advantageous when the bags of the invention are used to receive mailpieces, as described in more detail below.

It will now be on the 11 to 12 Reference is made, in which still another variant of the invention is shown, wherein the bag 200 at the bag end, from the first fold 207 is spaced, with a third flap 280 is provided. The third flap may be from the first or second side wall 201 . 202 hang down and is at the corresponding second or first side wall 202 . 201 by means such as the gluing area 300 attached. The adhesive is preferably a peelable adhesive. The third flap 280 includes a fold 290 ,

When using this flap, goods can initially through the initially open end 218 be introduced into the bag, the end 218 then through the third door 280 is closed. The goods are then transported or stored in the bag as needed, and are accessible if necessary, by the flap 205 or the section 219 , as described above, is peeled off to the mouth 221 release. If the goods, such as, for example, unwanted goods that must be returned to the mail-order supplier, must be repackaged in the bag, they can pass through the muzzle 221 be filled in the bag. The estuary 221 is then adhesive through which the second flap 208 is provided, resealed. Additionally or alternatively, adhesive may be on the peelable portion 219 be used to reseal the bag. In this case, the peelable adhesive may be resealable, and / or an additional adhesive surface may be on the portion 219 or on the first side wall 201 provided that is protected by means such as a protective tape, wherein the tape is removed before reclosing. If re-access to the goods is needed, such as in the mail order company returned goods, the bag can be opened by the third flap 280 withdrawn or torn off.

It is now in particular on the 13 and 14 Referring to the bottom part of a bag according to an embodiment of the invention. The mouth, the flap and associated structural details have been omitted for clarity in these figures. In these figures is the bag 901 shown in flat condition before filling. The bag 901 includes a closure end 902 (which in the bag of the invention will have the easy-open closure), a bottom wall 903 , first and second side walls 904 . 904b and lateral edges 905a . 905b , The side walls 904 . 904b are on marginal edges 905a . 905b over its entire length by suitable means, such as by heat welding and / or by adhesive and preferably by heat welding. However, in alternative embodiments, the adhesive sites may be located at locations other than the lateral edges or may be eliminated if the body of the bags is in the form of a tube.

The bottom wall 903 includes one through first folds 909 ' and 909 '' and the second fold 990 limited impact. The impact has wall wings or impact wings 906a and 906b with two edges each 907 mitred on. The edges 907 mitred, gaskets are mitered with a sealing line extending from each end of the second fold 990 (ie, from point X) to the points Y at the first folds 909 ' . 909 '' extends. The edges 907 Miter therefore form inner marginal edges of the corners of the bag. The side walls 904 . 904b are along these sealing lines, which preferably include hot welds, with the bottom wall 903 connected. How to best in the 14 can see, lie the second fold 990 and the wall wings 906a . 906b between the side walls 904 . 904b , with the outsides of the wall wings 906a . 906b facing each other.

In the embodiment shown, the first and second side walls are 904 . 904b and the bottom wall 903 formed in one piece so that on a path that of the shown boundary of the side wall 904 at the end of the closure to the fold 909 ' , the fold 990 and the fold 909 '' and then to the shown boundary of the sidewall 904b at the closure end of the bag leads, no intermediate seam is present.

In less preferred embodiments, the side walls 904 and 904b for example, not be integral, that the path defined above by a, for example, along the fold line 990 or along or near the Fold 909 ' . 909 '' formed connecting seam is interrupted.

If the bag in his in the 13 and 14 flat state shown forms the edge 907 Mitred with the second fold 990 preferably an angle in the range between 30 ° and 60 °, particularly preferably an angle of 45 °

15 represents a bag part, which is the the 1 and 2 is similar, but in a substantially fully open state, in which it contains a product, or is ready to receive a filling. The side walls 904 . 904b are no longer, as in the 13 and 14 , substantially flat with each other, but are spaced apart. In the illustrated embodiment, the lateral edges 904 and 904b along the lateral edges 905a and 905b connected with each other. The seams span over the entire length of the side edges 905a . 905b preferably heat welds, although other bonding means such as adhesive may be used additionally or alternatively.

The upper edges of the side walls 904 . 904b will form the closure end of the bag and for reasons of clarity no structural details are shown in this figure. A substantially rectangular base section 908 (the component of the bottom wall 903 is) on which the bag can rest in an upright posi tion is through the fold lines 909 ' . 909 '' and 910 ' . 910 '' Limited and will be by exhibiting the wall wings 906a . 906b of the 13 and 14 educated. The edges 907 mitred now over a horizontal plane and are preferably directed to a vertical plane, although the filling of the bag can cause the edges 907 be further mitred out of the vertical. The edges 907 mitred and the fold lines 910 ' . 910 '' limit upstanding, generally triangular sections 911a . 911b the front wall. The fold lines 910 ' . 910 '' form the base of the sections 911a . 911b and the edges 907 mitred form the remaining sides with the apex of the triangles at the points X. Accordingly, in the illustrated embodiment, in use, the vertices of the triangular sections 911a . 911b the end wall above the base section 908 , The sections 911a . 911b be by exhibiting the wall wings 906a . 906b formed and include end portions of the bottom wall 903 , Preferably, the edges form 907 mitred with the fold lines 910 ' . 910 '' an angle between 30 ° and 60 °. Additional reinforcements (such as reinforcing welds or adhered reinforcing patches) may be provided if desired, such as at points X where the welds of the edges 907 Miter with the welds of the margins 905a . 905b be provided.

The one by the edges 907 mitred section 912 mitred corners, in 13 shown with dashed lines can be removed, if desired, to improve the palletization of the bag, but this is not essential. If they are not removed, form the sections 912 in the bag of 15 simply another triangular layer (not shown) that overlies YXY.

Consequently can by this embodiment of the Invention a bag available be placed stably in an upright position, suitable for transporting heavy and pourable materials is simple and inexpensive in an automatable process to manufacture and the excellent is palletizable.

This variant of the invention provides a bag with an easy-open closure portion and a stable, flat base portion. This type of bag is particularly suitable for transporting partially prepared foods within a factory and prepared foods between factory premises and retail stores. An example of such a bag after completion is in the 16 . 17 and 18 shown. Other suitable uses will be readily apparent to those skilled in the art. Characteristics that are the same or similar to those of 13 . 14 and 15 are not shown separately and will not be described again in detail.

in the Essentially, the bags of this embodiment of the invention combine the stable, flat base with an easy-open closure, the same or similar described above and also have an area on, by which the bag can be sealed after filling, without the easy-to-open Bother closure.

Referring to the 16 and 17a points the bag 500 a flat, stable base section 508 preferably as described with reference to 13 . 14 and 15 described, is configured. The bag has a bag section 500A with a first side wall 501 and a second side wall 502 on. On the first side wall 501 There is a flap attached to the mouth 521 to form a closure. The second side wall 502 includes one over the bag section 500A protruding extension 553 so that the mouth through the end edge 509 the first side wall 501 in combination with the inside 502A the two th side wall 502 is limited. The flap 505 is on the first side wall 501 attached in any of the ways described above, which allows it or a portion of it to be pulled off to the mouth 521 At the same time, it made it possible for the first side wall to be released 501 remains functionally intact. Therefore, the flap can 505 as in the first aspect of the invention, with a peelable adhesive on the first side wall 501 be attached, or the peelable adhesive may, as in the second aspect of the invention, be omitted. Particularly preferred is the closure flap 505 with removable adhesive 515 attached. The flap 505 is preferably along the lines of weakness 516 rupturable, with the lines 516 are particularly preferably formed as perforations. The bags of this embodiment may be at the boundary of the mouth 521 also a flap 528 include, with the flap 528 the flap 208 of the previously described embodiments is functionally equivalent.

In the in the 17a In the embodiment shown, the bag is closed by means of a closable area 550 locked. The actual closure may be by any suitable means 551 , such as adhesive or heat sealing. In the embodiment of the 17a is the lockable area of an end part 552 the flap 505 and the extension 553 the second side wall 502 educated. The extension 553 protrudes over the bag section 500A and more preferably is integral with the second side wall 502 educated.

When using the bag is the lockable area 550 initially open so that the bag can be filled. When the desired contents are filled in the bag, the lockable area becomes 550 through the appropriate means 551 locked. If access to the bag contents is needed, the flap will open 505 or its section 519 (in the illustrated embodiment) to release the mouth, so that the contents can be poured out.

Other embodiments of the closable area are possible. For example, the first and second side walls 501 . 502 be the same length, so no extension 553 is available. In this case, the estuary 521 as a slit or cut in the first side wall 501 formed and the shutter flap 505 lies over the slot or cut. Thus, the closable area may be through end portions of the first side wall 501 , the second side wall 502 and the flap 505 be formed. This embodiment is in 17b shown. In another, in 17c illustrated variant, the mouth can 521 forming slit or cut farther from the ends of the side walls 501 . 502 spaced (ie closer to section 508 ) can be arranged. In this case, the flap can 505 also further from these ends 509 . 510 the side walls 501 . 502 be spaced and does not have to be over these ends. The lockable area 550 can then only the end portions of the side walls 501 . 502 include. In this variant, the flap must 505 on both sides of the slot on the first side wall 501 be attached, wherein at least on one side a peelable or otherwise removable portion must be present to release the slot, while the first side wall 501 remains functionally intact. In this variant, the flap 505 , as in 17c shown with peelable adhesive 515 removable and secured by suitable means in place 554 permanently attached.

Another variant of the bag of this embodiment is in 18 shown. This bag is different from the one of the 17 only by the provision of handles 560 , These handles may be punched, cut or otherwise formed in the upper part of the bag, preferably just above the closable area 550 , Alternatively, separate handles may be attached to or near the closable area on the bag.

in the The following are methods for producing the bags according to the invention although it should be noted that the bags of the invention not limited to these procedures are.

First, a method of making the bag of 1 to 12 in particular with reference to 19 in short version. A plastic film web 600 is extruded and at 601 to the in 19A folded configuration shown folded. Then an optional second fold 602 produced in the finished state, the optional second flap 208 ( 2 . 7 . 8th ) ( 19B ). Next will be one or more areas of peelable adhesive 603 (such as a hot melt adhesive) on the surface of the bag ( 19C ) and the perforations 604 which the weakening lines 216 ( 3 . 4 . 5 . 6 ) are formed ( 19D ). The section 605 the film web 600 is then folded over and peeled through the adhesive 603 ( 19E ). The foil web 600 gets near the first fold 601 cut to the open end 606 of the bag through which the bag can be filled in the finished state ( 19F ). The film web is finally in bags of appropriate width cut and on the sides of heat seal (or other seals) are formed, resulting in the finished bag.

Two production processes of the bags after the 16 . 17 and 18 will now be described. In the first, in 20 illustrated method, is a film web 700 first at the fold 701 ( 20A ) folded. Then it is out of the fold 701 ( 20B ) an impact 702 formed and at the corners of the sections ( 20C ) are mitred seals 703 educated. A section 704 the film web 700 (indicated by the dashed line) is then removed ( 20D ) and removable adhesive 705 gets onto the surface of the film web 700 ( 20E ) applied. An additional, the weakening lines 716 comprehensive film web 706 is then applied to the peelable adhesive over the area 707 the film web ( 20F ) lies. Finally, the film web is cut and the resulting side edges are sealed (such as by heat sealing) to form the finished bags. The parts 706 and 707 give the lockable area 708 ( 20G ).

In an alternative, less preferred method, disclosed in U.S. Pat 21 is shown, are in 21A to 21E illustrated method steps are the same or similar to those of 20A to 20E , In the in 21F shown method step are in the part 707 perforations 709 (which the weakening lines 216 bil den), wherein the part 707 then at the fold 710 ( 21G ) and the peelable adhesive 705 is attached. The foil web 700 will then be in the area of the fold 710 cut to the opening of the bag ( 21H ). The fold 710 is from the end of the film web 700 at point 711 spaced so that it has a closable area 712 allows after the fold 710 was cut off. The film web is then cut and the side edges are sealed as previously with reference to FIG 20G described.

In 22 is a method for making a bag similar to the bag of 1 to 12 shown. In this bag, the mouth is spaced from the ends of the bag, although the method may be arranged to position the mouth closer to the ends of the bag.

It will now be on the 22 Reference is made in a plastic film web 750 extruded and at the folds 751 and 752 to the in 22A folded configuration is folded. In 22A is the distance of the end edges 753 . 754 the film web 750 for the sake of clarity exaggerated. An optional third fold that forms an optional second flap by Rand 753 or 754 hanging down, can also be recorded. This second flap is similar in design and handling of the second flap, the fold 602 in 19 hangs.

Next will be one or more areas of peelable adhesive 755 (such as hot melt adhesive) applied to the surface of the bag. The adhesive 756 will also be on the opposite side of the gap 757 applied, with the adhesive 757 can be deductible or permanent ( 22B ). An additional film web 758 is then on the adhesive areas 755 . 756 applied to the gap 757 to cover and close. The additional film web comprises the weakening lines 759 ( 22C ). Finally, the film web 750 sliced to form individual bags and one side 760 is sealed, such as by heat sealing or adhesive ( 22D ). The other end 761 is open to fill the bag and may be in the area 762 after filling the bag ( 22E ) are closed. In an alternative variant, the film web 750 after the in 22C illustrated step as in 22D sliced to form individual bags and both side edges 761 and 763 can then be sealed, such as by adhesive or heat sealing. In this variant, the fold 752 (either before or after cutting the film web 750 ) to provide access to the bag for filling. This end portion can then be closed after filling the bag, for example by heat sealing or adhesive.

23 Figure 11 shows another variant of the bags of the invention with the mouth spaced from the ends of the bag. Referring to the 23 points the bag 560 a flat, stable base section 508 which is preferably configured as with reference to FIGS 13 to 15 and with reference to the 16 and 17 described. The bag 560 also includes a lockable area 550 which can be closed after filling the bag in any of the ways described above. The estuary 521 of the bag 560 has the shape of a slot or gap 562 , The estuary 521 is through a flap 565 that over the gap 562 lies, closed. The flap is at the front 561 of the bag through a region of peelable adhesive 563 attached and on the other side of the gap 562 through an area with removable adhesive or permanent adhesive 564 , The flap includes lines of weakness 566 along which the flap 565 can be torn, leaving a section 569 through the area with removable adhesive material 563 can be deducted to the mouth 521 release.

24 provides a method of making the bag of the 23 In this process, a plastic film web 770 extruded and at the folds 771 and 772 to the in 24A folded configuration shown folded. In 24A is the distance of the end edges 773 . 774 the film web 770 for the sake of clarity exaggerated. An optional third fold that forms an optional second flap by Rand 753 or 754 hanging down, can also be recorded. This second flap is similar in design and handling of the second flap, the fold 602 in 19 hangs.

Next is from the fold 771 ( 24B ) an impact 775 generated and at the corners of the sections ( 24C ) are mitred seals 776 educated. Subsequently, the fold 772 cut off to an open end for filling 776 of the resulting bag ( 24D ). An area or areas of peelable adhesive 777 will be adjacent to the gap 778 applied to the bag, and the adhesive areas 779 are also on the opposite side of the gap 778 applied. The adhesive areas 779 may be deductible or not deductible. The places where the adhesive areas 777 and 779 can be reversed, if desired ( 24E ). An additional film web 780 with weakening lines 781 is then on the adhesive areas 777 . 779 applied to the gap 778 ( 24F ) to cover (and close). Finally, the film web 770 cut to form individual bags and the side edges are sealed by, for example, heat sealing or adhesive. After filling the bag, the open end can 776 by suitable means in the closable area 782 be closed.

Claims (19)

Plastic bag ( 500 ) for the transport and storage of powdered or granular bulk material or pourable food ingredients, the bag ( 500 ) an open end and a closed end ( 508 ) and comprising: first and second side walls ( 501 . 502 ), which together form a bag section ( 500A ) having a front and a back; an estuary ( 521 ) for access to the interior of the bag ( 500 ) in use; a flap ( 505 ) which overlies and closes the mouth and which encloses an area which is peelably attached to the front ( 515 ) is that at least a portion of the flap ( 505 ) from the front over the peelably secured area ( 515 ) can be deducted to the mouth ( 521 ), leaving the front side functionally intact; characterized in that: the closure flap ( 505 ) separated from the first and second side walls ( 501 . 502 ) is formed and the mouth ( 521 ) is different from the open end; the peelably secured region comprises at least one adhesive surface which extends without interruption from one lateral edge of the closure flap to the other, thereby sealing the mouth against leakage of the bag contents; and in that the bag ( 500 ) further comprises: a closable area ( 550 ) near the open end of the bag and distinct from the mouth ( 521 ) and the peelable portion of the closure flap, wherein in the closable area (FIG. 550 ) the open end of the bag is sealable by the user after heat sealing has been applied after a content has been introduced through the open end and wherein the heat sealable surfaces are free of any adhesive. Plastic bag ( 500 ) for the transport and storage of powdered or granular bulk material or pourable food ingredients, the bag ( 500 ) has an open end and a closed end and comprises: first and second side walls ( 501 . 502 ), which together form a bag section ( 500A ) with front and back form; an estuary ( 521 ) for access to the interior of the bag ( 500 ) in use; a flap ( 505 ), which lies above the mouth and closes it, characterized in that: the mouth ( 521 ) is different from the open end; the flap ( 505 ) separated from the first and second side walls ( 501 . 502 ) and having an area with at least one adhesive surface, with which the closure flap is attached to the front and which extends without interruption from one lateral edge of the closure flap to the other, thereby to seal the mouth against leakage of the bag contents, wherein the Hatch flap includes at least one line of weakness defining a portion of the flap which does not contain part of the area attached to the front and which portion may be opened by tearing along the line of weakness to the mouth (10). 521 ) of the bag; and in that the bag ( 500 ) further comprises: a closable area ( 550 ) near the open end of the bag ( 500 ) and different from the mouth ( 521 ) and to open by tearing the section of the flap, whereby by means of the closable area ( 550 ) the open end of the bag ( 500 ) can be closed by the user by heat sealing, after a content has passed through the open end into the bag ( 500 ) and wherein the heat sealable surfaces are free of any adhesive. Plastic bag ( 500 ) according to claim 1 or 2, wherein the first side wall ( 501 ) the front of the bag ( 500 ) and the second side wall ( 502 ) the back of the bag ( 500 ) and the side walls ( 501 . 502 ) have substantially the same length and the mouth ( 521 ) one in the front ( 501 ) and the lockable area (FIG. 550 ) End portions of the first and second side walls ( 501 . 502 ). Plastic bag ( 500 ) according to one of the preceding claims, wherein the front side comprises a weakening line which can be torn to the mouth ( 521 ) to build. Plastic bag according to claim 3 or 4, wherein the closable area ( 550 ) further comprises an end portion of the closure flap ( 505 ). Plastic bag ( 500 ) according to claim 1 or 2, wherein the first side wall ( 501 ) the front of the bag ( 500 ) and the second side wall ( 502 ) the back of the bag ( 500 ) and wherein the second side wall ( 502 ) one over the bag section ( 500A ) projecting extension ( 553 ) and the closure flap ( 505 ) over a part of the first side wall ( 501 ) and the extension ( 553 ) of the second side wall ( 502 ) and the lockable area is the extension ( 553 ) of the second side wall ( 502 ) and an end portion of the flap ( 505 ). Plastic bag ( 500 ) according to claim 6, wherein the mouth ( 521 ) through the end edge of the first side wall ( 501 ) is limited. Plastic bag ( 500 ) according to any one of the preceding claims, further comprising a second flap ( 528 ) formed by a fold from an edge of the mouth ( 521 ) and extends into the interior of the bag. Plastic bag ( 500 ) according to claim 8, wherein the second flap ( 528 ) with an adhesive on the inside of the second side wall ( 502 ) can be attached. Bag ( 500 ) according to one of the preceding claims, further comprising a base section ( 508 ), on which the bag ( 500 ) can be stable if it contains a product. Bag ( 500 ) according to claim 10, wherein the base section ( 508 ) Comprising: a bottom wall ( 903 ) along their opposite sides via first folds ( 909 ' . 909 '' ) each with the first and second side walls ( 904 , b) is connected, the wall ( 903 ) a second fold ( 990 ), whose extent with the width of the side walls ( 904 , b) matches and substantially parallel to the first folds ( 909 ' . 909 '' ), wherein the second fold ( 990 ) the bottom wall ( 903 ) in a first and a second wall wing ( 906a , b) splits, so that the second fold ( 990 ) and the wall wings ( 906a , b) between the side walls ( 904 , b) and the outsides of the wings ( 906a , b) face each other; and seals ( 907 ) miter with a sealing line extending from each end of the second fold ( 990 ) to each first fold ( 909 ' . 909 '' ), wherein the first and the second side wall ( 904 , b) each along these sealing lines ( 907 ) with the bottom wall ( 903 ) are connected. Bag ( 500 ) according to claim 10, wherein the base section ( 508 ) a generally rectangular bottom wall ( 908 ) with opposite lateral edges and opposite end edges and generally triangular sections ( 911a , b) the end wall, each along a base side ( 910 ' . 910 '' ) the bottom wall ( 908 ) depend from their respective end edge, the bottom wall ( 908 ) with the respective first and second side wall over the first fold ( 909 ' . 909 '' ) which coincide with the respective lateral edges, the triangular sections ( 911a (b) the end wall has a vertex (X) which, when in use, is above the bottom wall ( 908 ), and lateral edges with sealing lines ( 907 ) located between the vertex (X) and the respective corners of the base portion ( 908 ) and along which the first and second side walls are respectively connected to the portions of the end wall. Plastic bag ( 500 ) according to one of claims 1 to 9, wherein the closed end of the bag is provided with a third flap which extends over the first or second side wall ( 501 . 502 ) and is removably attached thereto, and wherein the third flap at the end of the bag ( 500 ) spaced from the open end, from the second or first side wall (FIG. 502 . 501 ) hangs down. Plastic bag ( 500 ) according to claim 2 or any preceding claim dependent thereon, having at least two weakening lines ( 516 ), along which this section can be opened by tearing open. Plastic bag ( 500 ) according to claim 1 or any preceding claim dependent thereon, wherein the peelable portion of the closure flap ( 505 ) by at least one weakening line ( 516 ) along which the closure flap ( 550 ) is torn open to the mouth ( 521 ) of the bag. Plastic bag ( 500 ) according to claim 15, wherein the peelable portion ( 519 ) of the closure flap ( 505 ) by two weakening lines ( 516 ) is limited. Plastic bag ( 500 ) according to claim 16, wherein the weakening lines ( 516 ) from an end edge of the closure flap ( 505 ), which is accessible from the lockable area ( 550 ), to points near the mouth ( 521 ). Plastic bag ( 500 ) according to claim 1 or any preceding claim dependent thereon, the peelable portion ( 519 ) of the flap on the front is attached with a peelable adhesive. Plastic bag ( 500 ) according to one of claims 14 to 18, wherein the weakening line or lines ( 516 ) consists of formed in the flap perforations / exist.