DE102005057669A1 - Reclosable sealed plastic- or paper-plastic-composite material bag, has longitudinal sealed seams provided at two sides and formed between opening of side edges and removal opening based on recesses formed by front and rear sides - Google Patents

Abstract

The bag (60) has front and rear sides on an outer side that is arranged oppositely relative to an inner side of the bag that is made of plastic- or paper-plastic-composite material. A removal opening (48) is open to the inner side, where a base is closed with a sealed seam (51). Side edges are arranged relative to longitudinal sealed seams (44, 49) in an area of the opening. The longitudinal sealed seams that are provided at two sides are formed between an opening (39) of the edges and the removal opening based on recesses formed by the front and rear sides. An independent claim is also included for a method of manufacturing a reclosable bag.

Description

The The invention relates to a sealed (plastic or paper-plastic composites), generic bag according to the preamble of the main claim, namely a means having an opening Reclosable two-way pouch at each Side longitudinal sealing seams having Gussets, with a front and back on the respect to the Inner side of the bag opposite arranged outside, with a withdrawal opening open to the inside of the bag as well with a possibly, e.g. closed with a sealed seam, taking the reclosure is arranged in the region of the removal opening transversely to the longitudinal sealing seams.

Such Bags are known in a variety of embodiments. They point an at least two-layer composite material with at least one the inside of the bag forming sealable side and can after a method in so-called longitudinal travel be prepared with head or ground in advance. You can at the Bottom for filling open stay. If a topzipper is used as a reclosure, so can the bottom should be closed when filling from the top through the removal opening and the opened one Topzipper done.

Because of the reaching to their removal opening Gussets in the area of their reclosure - without this - but are the longitudinal sealing seams of this Four-ply bag and therefore thick, which facilitates handling when Closure difficult. If the generic bag, however, in the so-called Crossing procedure with shortened Side gussets is made, the bag side edges head or feet ahead in the direction of travel through the machine and the gussets supplied separately laterally and being sealed and the reclosure being endless in Supplied running direction is so rich in the case produced bag the shortened gussets although not to the removal opening at the bag top edge; the longitudinal sealing seam the outside of the line for folding the gusset goes over the - before endlessly fed and - about the entire width of the bag extending reclosure. Moreover must they Gussets in most cases be pre-printed separately, resulting in double Druckvor- and -forlaufkosten brings with it.

The The invention also relates to a generic method according to the preamble the method main claim, namely a method for producing a resealable bag, with one with an opening provided and arranged in the region of the removal opening, transversely to the direction recessed with the formation of two lateral ends, the one at the front or the back of the bag and a side facing away from this side and fixed at the rear or the front rear half having at least one of the two halves provided with the opening is that separates an upper part from a lower part, with two gussets of the bag, one with respect to the Outside of the bag opposite inside open removal opening as well as with an optionally closed bottom, wherein the bag from a continuously transported in the direction of travel, two sides, namely one Upper and one lower side having web from an at least Two-layer composite material is produced, whose the inside formed of the bag to be produced forming (top or bottom) sealable is, the train first along each two, each one of the two gussets forming, parallel to the direction folded lines and the two gussets on the inner side of the front or back of the bag are placed, after which the reclosure with its lower part on both the inner side of the front or back the bag as well as with its two lateral ends on the both gussets on and on these and on the inner Side with its front half as well at least partially with its upper part of the front half this inner side is sealed on one side, after which the return or Front of the bag to form a semi-tubular track on the front or back is folded, and then finally the web to a bag length in the direction of travel transported further and both along the two gussets forming lines with a longitudinal sealing seam sealed longitudinally as well as the reclosure with its rear half on the inner side of the Return or The front or bag sealed, if necessary, the bottom of the bag sealed and this is isolated.

One Such manufacturing process in so-called longitudinal travel with head or ground advance is known per se and has proven itself. With this procedure let attach themselves as reclosure front or topzipper; the longitudinal sealing seams of this But bags are because of reaching to their removal opening gussets in the area of their reclosure - without this - four-ply and thus thick, resulting in the risk of damage in this area entails and the handling of the bag When opening and difficult to reclosure.

Of the Invention is based on the object, a bag and a generic method for To propose such a bag, the less susceptible to interference the production and easier to handle when reclosing are.

These Task is in a generic bag according to the preamble of the subject claim according to the invention by its characterizing Characteristic, thus solved that the longitudinal sealing seams provided on both sides between the opening of the Reclosing and the removal opening of the bag due of recesses arranged in this part only from the front and back of the bag.

By this education is it possible the lateral ends of the reclosure either completely in the To attach region of the recess, in which case the adjacent thereto arranged - open - areas the two gussets e.g. by transverse or oblique seals have to be sealed or at least partially in the recess to order and the adjacently arranged - open - areas of the two gussets at the same time as closing the reclosure. In both cases include at least in the area between the opening of the reclosure and the removal opening the longitudinal sealing seams only the front as well Back of the Bag and because of the not endless, but cut to length reclosures also these are not; instead, they end directly at the longitudinal sealing seams. All in all are the inventive Bag therefore easier to handle when reclosing.

Preferably the reclosure is designed as a topzipper or -slider, because with it an easier removal of the contents as well as easier handling (To open and resealing) the reclosure as opposed to one-sided either at the front or the back attached front zipper possible is.

The Task is also in a generic manufacturing process according to the preamble of the method main claim according to the invention its characterizing feature, that solved by the fact that before the first Fold the web in the area of each gusset punched out of a recess and then the two lateral ends of the upper part the front half the reclosure in the region of the recess on the inner Side of the front or back the bag sealed outside the longitudinal sealing seams become.

By the inventive Procedure by which a new bag in longitudinal travel with head or ground is made in advance, so it is possible the lateral ends the reclosure either completely in the region of the recess to attach, in which case the adjacently arranged - open - areas the two gussets e.g. by transverse or oblique seals have to be sealed or at least partially in the recess to order and the adjacently arranged - open - areas of the two gussets at the same time as closing the reclosure, because the side folds are shortened by the punched-out recess. In both cases are at least in the area between the opening of the reclosure and the removal opening the longitudinal sealing seams only by the front and back formed of the bag and include because of the not endless, but cut to length reclosures these are not; instead, they end directly at the longitudinal sealing seams. By the inventive production process is the web of the two-ply composite with at least a sealable (upper surface) forming the inside of the bag to be manufactured or sub) page first on the non-sealable Lower or upper side completely with all sides of the bag to be made (front, back and both gussets) printed and expediently on a roll wound. From this role is then the web for the production of the Peeled off bag.

Instead of this is also possible according to the teaching of the invention that initially either the reclosure with its one side sealed on the web After that the recesses are punched or vice versa, afterwards shaped the gussets and placed on the reclosure, finally turned the web to the half tube and then all the seals, preferably simultaneously and separating the produced bags be made.

Further expedient Embodiments and developments of the bag and the manufacturing process are in the subclaims characterized.

One embodiment will be explained in more detail with reference to the drawing. In this shows:

1 a drawn from a roll web, in a schematic perspective view;

2 according to a first method step with recesses punched web according to 1 in plan view;

3 with the punched-out recesses in a subsequent process step, in a schematic perspective view;

4 the track piece after 3 , after folding, in a schematic perspective view;

5 the attachment of a reclosure on the according 4 folded web section;

6 the tube section formed according to 5 in a schematic perspective view;

7 a section VII-VII according to 6 ;

8th a section VIII-VIII according to 6 ;

9 the finished in a subsequent process step track section according to 6 and

10 a section XX according to 9 ,

A train 20 becomes according to directional arrow 21 from a roll 22 deducted and has a top 23 as well as a bottom 24 on. The web consists of an at least two-ply composite material with at least one inside 25 ( 2 ) of the bag to be produced, the sealable side 23 , where the bottom 24 Mostly printed.

In the train 20 , which is shown in plan view and on both sides aborted representation, recesses 26 stamped, which are rectangular in the reproduced embodiment. After a feed of the train 20 according to the directional arrow 21 around bag length 27 then the web is moved in cycles and again in the area of the two gussets 28 . 29 passing through a pair of adjacent lines 30 . 31 be formed and between each a middle fold 32 have the finished bag, so mounted that the front in the transport direction edges 33 two with respect to the transport direction 21 adjacent recesses 26 aligned with each other. The same applies to the unspecified in the transport direction 21 rear edges of each recess of two adjacent recesses 26 , Otherwise, the two are parallel to the transport direction 21 extending edges of each recess 26 from the couple lines 30 respectively 31 every gusset 28 respectively. 29 educated.

After the process step of punching out the recesses 26 as he is in 2 is explained, the in 3 shown section of the track 20 along the pair of lines 30 respectively 31 folded in the same direction, so that the inside 25 of the bag to be produced. At the middle fold 32 In each case, an opposing folding is made, wherein the punched recess 26 shortened the length of the gusset. At each of the two side edges 34 the train 20 becomes along each a parallel extending supernatant line 35 made a folding (see also 2 ). The so basically provided with fold lines track 20 becomes like its section according to 4 shows, with those with their middle wrinkles 32 inwardly folded gussets 28 respectively. 29 on the inner area of the front 36 of the bag to be made 60 Hanging up, taking part in the folding along the line 30 the gusset 28 subsequent back 37 of the bag to be made from this area still folded away. The punched-out recess 26 the extent shortened gussets 28 respectively. 29 are in this direction of production in the transport direction 21 at the back of the bag, which is why this production method is also called "foot ahead" in so-called longitudinal travel.

5 shows the section of the web 20 at the next process step. In fact, this is a cut-to-length re-closure 38 transverse to the direction of travel 21 fed and with its opening on the front edge 33 each of the two punched recesses 26 hung up, with the two lateral ends 40 at a distance from the folding edge forming lines 30 respectively 31 end up. The in running direction 21 - concerning the opening 39 - back part and the manufactured bag upper part 41 the reclosure 38 This is only on the inner part of the front page 36 on sealed. The concerning the running direction 21 front and finished bag below the opening 39 located lower part 42 on the other hand lies on the gussets 28 . 29 behind in the direction of travel 21 and at the finished bag below the front edge 33 the punched recess 26 at. In this position, the reclosure 38 sealed, with the seal also at the same time the two gussets 28 . 29 on the inside of the front 36 sealed and thus closed in the upper area. The reclosure 38 is formed in the embodiment shown as a top zipper and is placed in the locked state.

Then the back 37 in a next step to the front 36 forming a quasi half-hose according to the directional arrow 43 like the one in 6 shown section of the track 20 shows.

7 shows a section through the quasi in the form of a half-tube part of the web 20 , In the upper area it can be seen that at the the front 36 the bag forming area of reclosure 38 is sealed and spaced from the line 30 respectively. 32 ends. The backside 37 the bag is not yet here with the reclosure 38 connected. This designed as a topzipper reclosure is locked here in the State with its the front 36 facing front half 45 to the inner area of the front 36 sealed, whereas the rear half 46 at a distance from the back 37 ends.

In contrast to 7 with the section through the upper area 41 the reclosure 38 is in contrast 8th a section through the lower area 42 the reclosure 38 shown. This lower part 42 reclosure, with its front and back halves 45 respectively. 46 is at the inner area of the front 36 sealed and that also the subsequent to the front part of the gusset 28 , which coincides with the sealing of the reclosure 38 to the inner area of the front 36 he follows.

Then, how will 9 covering an area of the railway 20 in the subsequent operation, shows, at the one gusset 28 along the direction of travel 21 running longitudinal sealing seams 44 along the lines 30 extending folding edges attached.

Also in the area of the gusset 29 be over the entire bag length 27 Longitudinal sealing seams 49 attached, which is also parallel to the direction 21 are aligned and dull on the lateral area 40 the reclosure 38 abuts. One each of the two sealed seams 44 . 49 every gusset 28 . 29 pushes dull against the respective lateral area 40 the reclosure. In the area of the gusset 28 above the upper part 41 the reclosure 38 to the removal opening 48 of the bag 60 is the longitudinal seal 44 . 49 only from the front and back 36 respectively. 37 educated. Thus, in this by the reference numeral 47 designated area on each side of the bag 60 only a single longitudinal seam 44 . 49 intended.

At the same time be on the supernatant line 35 up to each of the two parallel side edges 34 the train 20 protruding areas also with a longitudinal sealing seam 50 and with a sealed seam 51 provided on the bottom to close the bag. The sealed seam 50 in the supernatant area 34 will then, as in 10 shown schematically, by means of a cutting device 52 . 53 away. Thereafter, the longitudinal sealing seams 44 . 49 trimmed.

By cross-cutting in the area of the removal opening 48 then can the finished bag 60 from the train 20 separated and thus isolated.

In order to prevent the filling material from getting caught in the upper region of the side folds during removal, in an advantageous embodiment the bag is provided with a sloping seam, as shown schematically in FIG 54 in 5 is shown. For clarity, this oblique seal 54 omitted in the further drawings. The now isolated bag can then via the removal opening 48 filled and the bag closed by closing the reclosure. If desired, a safety transverse seam could still be applied between the reclosure and the removal opening.

Claims (16)

By means of an opening ( 39 ) having reclosure ( 38 ) reclosable bag ( 60 ), with two longitudinal sealing seams on each side ( 44 . 49 ) having gussets ( 28 . 29 ), with a front ( 36 ) and back ( 37 ) on the inside ( 25 ) of the bag ( 60 ) arranged on the opposite side, with one to the inside ( 25 ) of the bag ( 60 ) open discharge opening ( 48 ) as well as with a possibly eg with a sealing seam ( 51 ) closed bottom, wherein the reclosure in the region of the removal opening ( 48 ) transverse to the longitudinal sealing seams ( 44 . 49 ) is arranged, characterized in that the provided on both sides longitudinal sealing seams ( 44 . 49 ) between the opening ( 39 ) of the reclosure ( 38 ) and the removal opening ( 48 ) of the bag ( 60 ) on the basis of recesses provided for in this part ( 26 ) only from the front and back ( 36 respectively. 37 ) of the bag ( 60 ) are formed. Bag ( 60 ) according to claim 1, characterized in that between the opening ( 39 ) and the removal opening ( 48 ) of the bag ( 60 ) located upper part ( 41 ) of the reclosure ( 38 ) between its two lateral ends ( 40 ) directly to the front and / or back ( 36 respectively. 37 ) is sealed. Method for producing a resealable bag, having one with an opening ( 39 ) and in the region of the removal opening ( 48 ), transversely to the running direction to form two lateral ends ( 40 ) cut to length reclosure ( 38 ), one at a front or a back ( 36 respectively. 37 ) of the bag ( 60 ) front and one side facing away and at the back and the front ( 37 respectively. 36 ) fixed rear half ( 45 respectively. 46 ), wherein at least one of the two halves ( 45 . 46 ) with the opening ( 39 ), which is an upper part ( 41 ) from a lower part ( 42 ), with two gussets ( 28 . 29 ) of the bag ( 60 ), with respect to the outside of the bag ( 60 ) opposite inside ( 25 ) open discharge opening ( 48 ) and with a possibly closed bottom, wherein the bag from a continuously in the running direction ( 21 ) transported two sei a top and a bottom ( 23 respectively. 24 ) ( 20 ) is produced from an at least two-layer composite material whose inner side ( 25 ) of the bag to be produced ( 60 ) forming (top or bottom) side is formed sealable, the web ( 20 ) first along each two, one each of the two side folds ( 28 . 29 ), parallel to the running direction ( 21 ) running lines ( 30 . 31 folded) and the two gussets ( 28 . 29 ) on the inside of the front or back ( 36 respectively. 37 ) of the bag ( 60 ), after which the reclosure ( 38 ) with its lower part ( 42 ) on both the inside of the front or back side ( 36 respectively. 37 ) of the bag ( 60 ) as well as with its two lateral ends ( 40 ) on the two gussets ( 28 . 29 ) and on this and on the inner side with its front half ( 45 ) and at least partially with its upper part ( 41 ) of the front half ( 45 ) is sealed on one side on this inner side, after which the back or front ( 37 respectively. 36 ) of the bag to form a semi-tubular track ( 20 ) on the front or rear side ( 23 respectively. 24 ), after which finally the web ( 20 ) by one bag length ( 27 ) in the running direction ( 21 ) and both along the two gussets ( 28 . 29 ) forming lines ( 30 . 31 ) with a longitudinal sealing seam ( 44 . 49 ) longitudinally sealed as well as the reclosure ( 38 ) with its rear half ( 46 ) on the inner side of the back or front side ( 37 respectively. 36 ) of the bag ( 60 ), optionally the bottom of the bag is sealed and this is separated, in particular according to claim 1 or 2, characterized in that - before the first folding of the web ( 20 ) in the area of each gusset ( 28 . 29 ) a recess ( 26 ) is punched out - and that then the two lateral ends ( 40 ) of the upper part ( 41 ) of the front half ( 45 ) of the reclosure ( 38 ) in the region of the recess ( 26 ) on the inner side of the front or back side ( 36 respectively. 37 ) of the bag ( 60 ) outside the longitudinal sealing seams ( 44 . 49 ) are sealed. Method according to claim 3, characterized in that the opening ( 39 ) of the reclosure ( 38 ) longitudinally in the direction of travel ( 21 ) front edge ( 33 ) each of the two punched-out recesses ( 26 ) is launched. Method according to claim 3 or 4, characterized in that prior to the formation of the semi-tubular path the reclosure ( 38 ) with its upper part ( 41 ) of the front half ( 45 ) only on the inner side of the front or back side ( 36 respectively. 37 ) of the bag ( 60 ) is completely sealed on one side. Method according to claim 5, characterized in that the two lateral ends ( 40 ) of the front half ( 45 ) of the direction of travel ( 21 ) transversely arranged reclosures ( 38 ) butt to the longitudinal sealing seams ( 44 . 49 ) nudge. Method according to one of claims 3 to 6, characterized in that after the formation of the semi-tubular web ( 20 ) each of the two gussets ( 28 . 29 ) below the opening ( 39 ) of the reclosure ( 38 ) to the bottom of the bag ( 60 ) with two longitudinal sealing seams ( 44 . 49 ) and above the opening ( 39 ) of the reclosure ( 38 ) to the removal opening ( 48 ) with only a single longitudinal sealing seam ( 44 . 49 ) and all longitudinal sealing seams ( 49 ) the bag length ( 27 ) correspond. Method according to one of claims 3 to 7, characterized in that the two side folds ( 28 . 29 ) in which the reclosure ( 38 ) adjacent area to the front or back ( 36 respectively. 37 ) of the bag are sealed. Method according to claim 8, characterized in that the two lateral folds ( 28 . 29 ) in which the reclosure ( 38 ) adjacent area with the front and back ( 36 respectively. 37 ) of the bag ( 60 ) by a sloping seam ( 54 ) get connected. Method according to claim 9, characterized in that each oblique sealing seam ( 54 ) forms an angle in the range of 30 ° to 60 ° with the associated longitudinal sealing seam. Method according to one of claims 3 to 10, characterized in that before the folding of the web ( 20 ) in the area of each gusset ( 28 . 29 ) punched recess ( 26 ) across the direction of travel ( 21 ) of the two adjacent lines ( 30 . 31 ) of the gusset is limited. Method according to one of claims 3 to 11, characterized in that in the running direction ( 21 ) front edge ( 33 ) of a punched recess ( 26 ) with the in the direction ( 21 ) front edge ( 33 ) of the other punched recess ( 26 ) flees. Method according to one of claims 3 to 12, characterized in that the punched recess ( 26 ) is rectangular. Method according to one of claims 3 to 13, characterized in that the reclosure ( 38 ) is cut to such a degree that its two lateral ends ( 40 ) at a small distance to the two gussets ( 28 . 29 ) defining lines ( 30 . 31 ) and with its two lateral ends ( 40 ) butt to one of the two longitudinal sealing seams ( 44 . 49 ) each gusset ( 28 . 29 ) nudge. Method according to one of claims 3 to 14, characterized in that the reclosure ( 38 ) is designed as a topzipper or -slider. Method according to one of claims 3 to 15, characterized in that via a supernatant line ( 35 ) to each of the two parallel side edges ( 34 ) the train ( 20 ) projecting areas on the longitudinal sealing seams ( 44 . 49 . 50 ) are separated (trimmed) before separating.