NO792907L

NO792907L - PROCEDURE AND DEVICE FOR MANUFACTURING FILTER BAGS

Info

Publication number: NO792907L
Application number: NO792907A
Authority: NO
Inventors: Walter Oldani
Original assignee: Walter Oldani
Priority date: 1978-09-21
Filing date: 1979-09-07
Publication date: 1980-03-24
Also published as: GB2032293A; DK377879A; GB2032293B; LU81696A1; DE2929194A1; FI792457A7; IT7925813A0; NL7906264A; FR2436673A1; SE7907759L; IT1123213B; BE878915A

Description

Fremgangsmåte og anordning for fremstillingMethod and device for production

av filterposer.of filter bags.

Foreliggende oppfinnelse angår en fremgangsmåte for fremstilling av filterposer tilsvarende innledning til krav 1, en anordning som angitt i innledningen til krav 5, for gjennom-føring av denne fremgangsmåte samt en filterpose som angitt i innledningen til krav 9. The present invention relates to a method for producing filter bags corresponding to the preamble to claim 1, a device as stated in the preamble to claim 5, for carrying out this method and a filter bag as stated in the preamble to claim 9.

/ Sådanne filterposer, særlig for kaffe, har i flatlagt tilstand som regel et trapeslignende omriss, idet poseåpningen foreligger ved den lengste, for det meste krumme grunnlinje for trapeset. De to papirskikt som ligger ovenpå hverandre i flat tilstand / Such filter bags, particularly for coffee, when laid flat usually have a trapezoidal outline, the bag opening being at the longest, mostly curved base line of the trapezoid. The two layers of paper that lie on top of each other in a flat state

av en sådan filterpose kan henge sammen ved en foldekant langs en trapesgren, hvilket i forhold til filterposer hvis papir-baner er innbyrdes forbundet ved pregning langs tre sidekanter, har den fordel at posen har mindre tendens til å falle sammen i bruk og inneholder mindre papirmengde. of such a filter bag can hang together at a folding edge along a trapezoid branch, which compared to filter bags whose paper webs are interconnected by embossing along three side edges, has the advantage that the bag has less tendency to collapse in use and contains a smaller amount of paper .

Filterposer av den foldede type kan fremstilles ved at man stanser ut den tilsvarende snittflate, folder denne en gang og forbinder de to papirskikt som ligger på hverandre langs to sidekanter. Dette er imidlertid omstendelig. Man kan imidlertid også fremstille posen ved at en papirbane foldes på langs, de innbyrdes inntilliggende papirskikt forbindes langs kantene av de filterposer som skal fremstilles, hvoretter filterposene skjæres ut. Dette kan være enklere, men fører til stort papiravfall. Filter bags of the folded type can be produced by punching out the corresponding cut surface, folding this once and connecting the two layers of paper which lie on top of each other along two side edges. However, this is circumstantial. However, the bag can also be produced by folding a paper web lengthwise, connecting the adjacent paper layers along the edges of the filter bags to be produced, after which the filter bags are cut out. This may be easier, but leads to a lot of paper waste.

Det er derfor et formål for foreliggende oppfinnelse å forenkle fremstillingen av filterposer og særlig å oppnå økonomisk gunstig, mest mulig papirsparende fremstilling av filterposene. For å oppnå dette foreslås en fremgangsmåte i henhold til patentkrav 1, en anordning som angitt i patentkrav 5 samt en filterpose som angitt i krav 9. It is therefore an object of the present invention to simplify the manufacture of filter bags and in particular to achieve an economically favorable, most paper-saving manufacture of the filter bags. To achieve this, a method according to patent claim 1, a device as stated in patent claim 5 and a filter bag as stated in claim 9 are proposed.

Den flatlagte papirslange medfører den fordel at den er enkelThe flattened paper tube has the advantage of being simple

å bearbeide. Ved fremstilling med foldéde lengdekanter gjør en sådan papirslange det også mulig langs sine kantområder å fremstille filterposer med en foldekant langs en trapesgren. to process. When manufactured with folded longitudinal edges, such a paper tube also makes it possible along its edge areas to produce filter bags with a folded edge along a trapezoid branch.

Hvis man på foretrukket måte bare fremstiller to innbyrdes inngripende rekker av motsatt rettede filterposer, kan papirav-fallet nedsettes til et minimum, idet man bare fremstiller filterposer av den foretrukkede foldede type. Hvis filterposene i de to rekker skal ha tilnærmet samme utseende så anordnes forbindelsesstedet mellom papirbanens sidekanter på foretrukket måte omtrent i midten av den flatlagte papirslange sett i lengderetningen. If, in the preferred manner, only two interlocking rows of oppositely directed filter bags are produced, paper waste can be reduced to a minimum, as only filter bags of the preferred folded type are produced. If the filter bags in the two rows are to have approximately the same appearance, then the connection point between the side edges of the paper web is preferably arranged approximately in the middle of the flattened paper tube seen in the longitudinal direction.

Foreliggende anordning for utførelse av oppfinnelsens fremgangsmåte kan være av meget enkel konstruksjon. The present device for carrying out the method of the invention can be of very simple construction.

Oppfinnelsen vil i det følgende bli nærmere forklart ved hjelp av et utførelseseksempel og under henvisning til den vedføyde skjematiske tegning, hvorpå: Fig. 1 viser sett fra siden vesentlige apparatdeler (uten ytre hylster), In the following, the invention will be explained in more detail with the help of an embodiment and with reference to the attached schematic drawing, on which: Fig. 1 shows a side view of essential device parts (without outer casing),

Fig. 2 viser apparatdelene i fig. 1 sett ovenfra,Fig. 2 shows the device parts in fig. 1 top view,

Fig. 3 viser et forenklet og forstørret snitt langs linjen III-III i fig. 1, Fig. 4 viser en anskueliggjørende skisse av den såkalte svanehals, Fig. 5 viser sett ovenfra en flatlagt slangedel med filterpose-anordning i en målestokk som avviker fra fig. 1-4, og Fig. 3 shows a simplified and enlarged section along the line III-III in fig. 1, Fig. 4 shows an illustrative sketch of the so-called swan neck, Fig. 5 shows, seen from above, a flattened hose part with a filter bag device on a scale that deviates from fig. 1-4, and

Fig. 6 viser en lett åpnet filterpose sett fra åpningssiden.Fig. 6 shows a slightly opened filter bag seen from the opening side.

En filterpapirrull 1 med passende papirbanebredde er dreibart opplagret i et ikke vist stativ. Fra dette sted trekkes papirbanen 2 på i og for seg kjent måte gjennom fremstillingsanordningen. Det antas her at papirbanens fremtrekk frembringes av pregevålse-paret 3. Derved passerer papirbanen 2 først en omlegningsinnret-ning, som i det foreliggende tilfelle består av to foldestaver 4. Ved hjelp av disse avbøyes papirbanens to langsgående kanter 5 innover, og.ved hjelp av føringsvalser 6, som samvirker med et innhult føringslegeme 7, legges papirbanens lengdekanter 5 ovenpå hverandre på den måte som er angitt i fig. 2 og 5. A filter paper roll 1 with a suitable paper web width is rotatably stored in a stand (not shown). From this point, the paper web 2 is drawn in a manner known per se through the production device. It is assumed here that the paper web is pulled forward by the embossing roller pair 3. Thereby, the paper web 2 first passes a refolding device, which in the present case consists of two folding rods 4. With the help of these, the two longitudinal edges 5 of the paper web are deflected inwards, and of guide rollers 6, which cooperate with a hollow guide body 7, the longitudinal edges 5 of the paper web are placed on top of each other in the manner indicated in fig. 2 and 5.

De innbyrdes overlappende banekanter 5 passerer nå et par pregeruller 8, således at det dannes en slange 20. Rullene 80 og 81 The mutually overlapping web edges 5 now pass a pair of embossing rollers 8, so that a tube 20 is formed. The rollers 80 and 81

er opplagret på parallelle akser 82, 83. Aksen 82 er opplagret på ikke vist måte i et ikke vist maskinstativ. Aksen 83 er ved hjelp av den anskuelig viste svanehals-anordning 84 forbundet med aksen 82, således at banekantene 5 kan tilføres gjennom slissen 85 til monteringsstedet 86 for pregerullene 80, 81. is stored on parallel axes 82, 83. The axis 82 is stored in a manner not shown in a machine stand not shown. The axis 83 is connected to the axis 82 by means of the clearly shown gooseneck device 84, so that the web edges 5 can be fed through the slot 85 to the mounting location 86 for the embossing rollers 80, 81.

Den således dannede slange 20 flatlegges nå ved hjelp av et blikk-stykke 9 som rager ut fra føringslegeme 7 og har jevnt tiltagende bredde, og trer inn mellom pregevalsene 3 som foretar de lokale pregninger som tilsvarer de sidekanter 10 og 11 av filterposene 21 som er vist i fig. 5, hvoretter skjærevalsene 30 skjærer ut de forskjellige filterposer 21. Disse filterposer har i flat- The thus formed hose 20 is now flattened with the help of a tin piece 9 which protrudes from the guide body 7 and has a steadily increasing width, and enters between the embossing rollers 3 which make the local embossings corresponding to the side edges 10 and 11 of the filter bags 21 which are shown in fig. 5, after which the cutting rollers 30 cut out the different filter bags 21. These filter bags have in flat

lagt tilstand trapeslignende omriss, viss ene trapesgren 10 og mindre grunnlinje 11 utgjøres av papirskikt 13, 14 (fig. 6) som er forbundet ved pregning. Langs trapesgrenen 12 (fig. 6 og 5), som faller sammen med slangekanten 120 (fig. 5), er papirskiktene 13, 14 innbyrdes forbundet til et stykke langs en brettekant. laid state trapezoidal outline, certain trapezoid branch 10 and smaller base line 11 are made up of paper layers 13, 14 (fig. 6) which are connected by embossing. Along the trapezoid branch 12 (fig. 6 and 5), which coincides with the hose edge 120 (fig. 5), the paper layers 13, 14 are mutually connected to a piece along a folding edge.

Det dreier seg således om filterposer 21 som er folded langs trapesgrenen 12. Forbindelsesstedet 55 (fig. 2, 5 og 6) for de langsgående kanter 5 av papirbanen 2, skjærer åpningskanten 15 (fig. 5) og den pregede trapesgren 10 av filterposen 21. It is thus about filter bags 21 that are folded along the trapezoidal branch 12. The connection point 55 (fig. 2, 5 and 6) of the longitudinal edges 5 of the paper web 2 intersects the opening edge 15 (fig. 5) and the embossed trapezoidal branch 10 of the filter bag 21 .

Ved hjelp av den anordning av filterposene 21 som er vist i fig. 5 er det papiravfall som 'er antydet med horisontal skravering innskrenket til et minimum, skjønt det skjæres ut filterposer 21 med krum åpningskant 15. By means of the arrangement of the filter bags 21 shown in fig. 5, the paper waste indicated by horizontal hatching is reduced to a minimum, although filter bags 21 with curved opening edge 15 are cut out.

For fullstendighetens skyld skal det tilslutt angis at det sted som i fig. 1 og 2 er betegnet med 22 tjener til samling av filterposene 21 og eventuelt pakning av disse, hvilket kan finne sted på kjent måte. For the sake of completeness, it should finally be stated that the place shown in fig. 1 and 2 are denoted by 22 serves for collecting the filter bags 21 and possibly packing them, which can take place in a known manner.

Claims

1. Method for the production of filter bags, especially for coffee, by folding, connecting and cutting web-shaped paper, characterized in that a flattened paper tube is formed and this is converted into filter bags by local connection between the adjacent parts of the tube and a corresponding cut-out.

2. Method as stated in claim 1, characterized in that the paper tube is formed by connecting the joined longitudinal side edges of a paper web.

3. Method as stated in claim 2, characterized in that the connection point between the longitudinal side edges of the paper web is arranged in the middle of the flat-laid paper tube seen in the longitudinal direction, and two mutually intervening rows of oppositely directed trapezoidal filter bags are formed in a flat state, so that each filter bag has an uncut trapezoidal branch formed by a longitudinal edge of the flat-layered paper tube.

4. Method as specified in claims 1-3, characterized in that the connection takes place by embossing.

5. Device for carrying out the method stated in claim 1, and which comprises pulling means (3) for web-shaped paper (2), equipment for connecting paper web layers (13, 14) which lie on top of each other along intended filter bag edges (10,

11) as well as equipment for cutting out (30) the filter bags (21), characterized in that devices (4, 6, 7, 8, 9) are arranged to form a flat paper tube (20).

6. Device as stated in claim 5, characterized in that it comprises a bending device (5, 6) for guiding the longitudinal side edges (5) of a paper web (2) inwards and to contact on top of each other, a guide body (7), connection equipment (8) for interconnecting the adjacent longitudinal edges (5) of the paper web (2) as well as devices for flattening (9) of the paper tube (20).

7. Device as stated in claim 6, characterized in that embossing rollers (80, 81) are arranged as connection equipment (8) for the mutually adjacent longitudinal edges (5) of the paper web (2).

8. Device as stated in claim 7, characterized in that the embossing rollers (80, 81) are interconnected by means of a gooseneck (84), the one embossing roller (81) being arranged in the interior of the guide body (7).

9. Filter bag which, when laid flat, exhibits a trapezoid-like outline with adjacent layers of paper (13, 14), which hang together for a distance along one of the trapezoidal sides (12), characterized in that one of the paper layers (13) consists of two paper parts which are interconnected at an overlapping point (55), which cuts the edge (15) along the bag opening for this layer (13) as well as a trapezoidal side of the flat bag outline.

10. Filter bag as stated in claim 9, characterized in that the aforementioned overlapping point (15) intersects the other trapezoidal side of the bag outline.