DK142567B

DK142567B - Method of rewinding plastic bags and apparatus for carrying out the method.

Info

Publication number: DK142567B
Application number: DK96278AA
Authority: DK
Inventors: Kai Nielsen
Original assignee: Ida Plast Aps
Priority date: 1978-03-03
Filing date: 1978-03-03
Publication date: 1980-11-24
Also published as: DE2908090A1; DK96278A; SE7901798L; DK142567C

Description

(11) FREMLÆGGELSESSKRIFT 1^2567 (S' \Ra^ DANMARK (61) Int. Cl.3 B 31 B 1/92 UMmVΙΜΠΙ\ B 29 D 7/26 (21) Ansøgning nr. 962/78 (22) Indleveret den 3· Dial*. 1978 W*·®*" (24) Løbedag 3· mar. 1978 (44) Ansøgningen fremlagt og . i n On(11) PUBLICATION NOTICE 1 ^ 2567 (S '\ Ra ^ DENMARK (61) Int. Cl.3 B 31 B 1/92 UMmVΙΜΠΙ \ B 29 D 7/26 (21) Application No 962/78 (22) Filed on 3 · Dial *. 1978 W * · ® * "(24) Running Day 3 · Mar. 1978 (44) The application presented and. In On

fremlæggelsesskriftet offentliggjort den 24 ♦ nOV · 1 yOUthe petition published on 24 ♦ nOV · 1 yOU

DIREKTORATET FOR . ^ PATENT- OG VAREMÆRKEVÆSENET (30) P"0"1®* «η (71) IDA-PLAST APS, Dorthe avej 4, 2400 København NV, DK.DIRECTORATE OF. ^ PATENT AND TRADE MARKET (30) P "0" 1® * «η (71) IDA-PLAST APS, Dorthe avej 4, 2400 Copenhagen NV, DK.

(72) Opfinder: Kai Nielsen, Hvids vær mer vej 28A, 2610 Rødovre, DK.(72) Inventor: Kai Nielsen, Hvid's Weather Road 28A, 2610 Rødovre, DK.

(74) Fuldmægtig under sagens behandling:(74) Plenipotentiary in the proceedings:

Patentingeniør Frantz Davidsen.Patent Engineer Frantz Davidsen.

(54) Fremgangsmåde ved opspoling af plastposer og apparat til udøvelse af fremgangsmåden.(54) Method of winding plastic bags and apparatus for carrying out the process.

Plastposer fremstilles almindeligvis af en endeløs rørformet bane af plastfolie, der i en hertil indrettet maskine eventuelt sammenfoldes på passende måde i langsgående retning og herefter i en af posehøjden bestemt afstand forsynes med tvær-5 gående perforeringer, som i banens fremføringsretning umiddelbart er efterfulgt af en tværgående svejsesøm, der danner posernes bund, hvorefter banen fortsætter til en opspolingsmekanisme, der frembringer ruller indeholdende et nærmere bestemt antal poser.Plastic bags are generally made of an endless tubular sheet of plastic film which, in a machine adapted for this purpose, is optionally folded in a longitudinal direction and thereafter, at a distance determined by the bag height, with transverse perforations which in the path of the web are immediately followed by a transverse welding seam forming the bottom of the bags, after which the web proceeds to a winding mechanism which produces rolls containing a specified number of bags.

2 1425672 142567

De af maskinen automatisk og kontinuerligt fremstillede poseruller føres derpå til en pakkestation eller emballeringsmaskine, hvor rullerne emballeres f.eks. i plasthylstre. Da rullerne som følge af plastmaterialets ringe 5 friktionskvotient er ret ustabile med tilbøjelighed til at løsne sig, således at operatøren ved manuel emballering ofte må foretage ekstra sammenrulningsoperationer, er en eventuel behandling i en automatisk emballeringsmaskine ikke mulig.The bag rolls produced automatically and continuously by the machine are then fed to a packing station or packaging machine where the rolls are packaged e.g. in plastic cases. Since the rollers due to the low friction quotient of the plastic material are rather unstable with the tendency to loosen, so that the operator often has to carry out extra rolling operations by manual packaging, any processing in an automatic packaging machine is not possible.

Til imødegåelse heraf kan man forsyne posemaskinen med et 10 særligt apparatur indrettet til under den sidste del af op- spolingen at anbringe en klæbestrimmel rundt om rullen, inden denne afgives fra posemaskinen. Dette apparatur er imidlertid relativt kostbart i anskaffelse og drift, ligesom det også af og til vil give anledning til driftsforstyrrelse.To counteract this, the bag machine can be provided with a special apparatus arranged to place an adhesive strip around the roll during the last part of the rewinding before it is delivered from the bag machine. However, this equipment is relatively expensive in procurement and operation, and it will also occasionally cause a malfunction.

15 Det er den foreliggende opfindelses formål at angive en fremgangsmåde ved opspoling af et forud bestemt antal plastposer, der er samlet i en bane, hvori de enkelte poser er adskilt ved tværgående perforeringer, og med hvilken de ovennævnte ulemper er undgået.It is an object of the present invention to provide a method of winding a predetermined number of plastic bags assembled into a web in which the individual bags are separated by transverse perforations and with which the above drawbacks are avoided.

20 Dette opnås ifølge opfindelsen ved at gå frem ved den i krav 1's kendetegnende del angivne måde. Under hensyn til at poserne ved anvendelsen nemt skal kunne aftages fra rullen, må væskens bindeevne ikke være for stor, men kun lige tilstrækkelig til at holde sammen på rullen under dens afgivelse 25 fra posemaskinen og påfølgende emballering. Endvidere må væsken under hensyn til, at poserne ofte anvendes i husholdningen til opbevaring af fødemidler, f.eks. i en dybfryser, ikke indeholde nogen form for giftstoffer.This is achieved according to the invention by proceeding in the manner specified in claim 1. In view of the fact that the bags can be easily removed from the roll during use, the binding capacity of the liquid must not be too great, but only just sufficient to hold on to the roll during its dispensing 25 from the bag machine and subsequent packaging. Furthermore, considering the fact that the bags are often used in the household for food storage, e.g. in a freezer, do not contain any toxins.

Ved en foretrukken udførelsesform for opfindelsen anvendes 30 som klæbevæske vand tilsat et afspændingsmiddel som angivet i krav 2. Det har overraskende vist sig, at man ved anvendelse af vand opnår en sammenklæbningseffekt, der i prak- 3 142567 sis fuldt ud tilfredsstiller de krav til rullens stabilitet, der forekommer ved såvel manuel som automatisk emballering af rullerne. Da vand endvidere i modsætning til almindelig anvendt lim ikke er hærdende, kan man til dens påføring an-5 vende en meget enkel og driftssikker foranstaltning, ligesom man også undgår den hyppige rengøring af maskinen, som anvendelse af et hærdende klæbemiddel vil nødvendiggøre.In a preferred embodiment of the invention, as an adhesive liquid water is added as a rinse agent as set forth in claim 2. Surprisingly, it has been found that, using water, an adhesive effect is achieved which, in practice, fully satisfies the requirements of the roller. stability that occurs with both manual and automatic packaging of the rollers. Furthermore, since water, unlike commonly used adhesives, is not curable, a very simple and reliable measure can be used for its application, as well as avoiding the frequent cleaning of the machine which use of a curing adhesive will necessitate.

Opfindelsen angår endvidere et til udøvelse af fremgangsmåden nødvendigt apparat.The invention further relates to an apparatus necessary for the practice of the method.

10 Dette apparat kan fortrinsvis være udformet på den i krav 4 angivne måde, der, som det vil ses, er en overordentlig enkel og driftssikker konstruktion.This apparatus may preferably be designed in the manner specified in claim 4 which, as will be seen, is an extremely simple and reliable construction.

Da posemaskinen på det sted, hvor klæbevæsken skal påføres posebanen, er forsynet med en omledervalse, kan vægen 15 hensigtsmæssigt være anbragt og udformet som angivet i krav 5 og 6.Since the bag machine at the place where the adhesive liquid is to be applied to the bag web is provided with a diverter roller, the wall 15 may conveniently be arranged and configured as claimed in claims 5 and 6.

Herved opnås en effektiv fordeling af klæbevæsken på posebanen, specielt hvis omledervalsen holdes i konstant rotation, og ved anvendelse af denne omledervalse som mellemled til 20 påføring af klæbevæsken opnås på enkel måde, at denne kun påføres den sidste i en rulle indgående pose.This results in an efficient distribution of the adhesive liquid on the bag web, especially if the diverter roller is kept in constant rotation, and by using this diverter roller as an intermediary for application of the adhesive liquid, it is easily obtained that it is only applied to the last one in a roll incoming bag.

Forsåvidt posemaskinens konstruktion ikke gør det muligt at anbringe vægen på ovennævnte måde, kan den være anbragt som angivet i krav 7, hvorved det midlertidige anlæg mod pose-25 banen automatisk opnås ved dennes forskydning under indvirkning af afriveren.Insofar as the construction of the bag machine does not allow the wall to be positioned in the above manner, it may be arranged as claimed in claim 7, whereby the temporary abutment against the bag path is automatically obtained by its displacement under the action of the tear.

Opfindelsen forklares nærmere i det følgende ved en udførelsesform under henvisning til tegningen, hvor 4 142567 fig. 1 viser skematisk set fra siden og delvis i snit opspo-lingsenden af en posemaskine forsynet med et væskepåføringsapparat ifølge opfindelsen og fig. 2 en del af samme set ovenfra.The invention will be further explained in the following by an embodiment with reference to the drawing, in which FIG. 1 is a schematic side view, partly in section, of the winding end of a bag machine provided with a liquid application apparatus according to the invention; and FIG. 2 is a top view of the same.

5 I fig. 1 betegner 1 en del af posemaskinens stel, hvori der drejeligt om en aksel 2 er lejret en karrusel, der bærer fire med akslen 2 parallelle spyd 4,5,6,7, der tjener til opspoling af en posebane 8, der tilføres i den med pilen 9 viste retning til opspoling af en poserulle på spydet 4. Posebanen 8 er 10 ført over en stang 11, der efterfølges af en afriver 12, som umiddelbart efter, at den er passeret af perforeringen mellem næstsidste og sidste pose i rullen, drejes til den med punkterede linier viste stilling 12' og bringer posebanen til at forløbe i den med punkterede linier viste stilling, hvor den 15 vil være i anlæg med en omledervalse 13. Når den påfølgende perforering passerer afriveren 12, vil denne ved indgreb i perforeringen bryde posebanen, hvis herved frigjorte forreste ende opfanges og fastgøres til spydet 7, der påbegynder opspoling af den næste poserulle. I forbindelse hermed drejes 20 karruselen 90° i den med pilen 5 angivne retning, således at spydet 7 bringes op til den stilling, der tidligere var indtaget af spydet 4, der samtidig bringes til den af spydet 5 indtagne stilling. I forbindelse hermed trækkes spydet 4 i aksial retning ud af poserullen 10, der falder ned på en bakke 14, der 25 tjener til opsamling af de færdigt opspolede poseruller, og hvorfra disse videregives til emballering.5 In FIG. 1, 1 denotes a portion of the bag machine frame in which rotatably a shaft 2 is mounted a carousel carrying four spears 4,6,6,7 parallel to the shaft 2, which serves to rewind a bag web 8 fed into it. indicated by the arrow 9 for spooling a bag reel on the spear 4. The bag web 8 is passed over a rod 11 followed by a tearer 12 which is rotated immediately after passing through the perforation between the last and last bag of the reel. to the dotted line position 12 'and causes the bag web to run in the dotted line position, where it 15 will be in contact with a diverter roller 13. When the subsequent perforation passes the peeler 12, it will break upon engagement in the perforation. the bag web, thereby releasing the front end thereof is intercepted and attached to the spear 7, which begins winding of the next bag roll. In connection with this, the carousel 20 is rotated 90 ° in the direction indicated by the arrow 5, so that the spear 7 is brought up to the position previously occupied by the spear 4, which is simultaneously brought to the position occupied by the spear 5. In connection therewith, the spear 4 is pulled axially out of the bag roll 10, which falls onto a tray 14 which serves to collect the finished coiled bag rolls and from which it is passed for packaging.

Det på tegningen viste apparatur til påføring af klæbevæsken udgøres af en på posemaskinens rammedel 1 anbragt beholder 20, der strækker sig langs med omledervalsen 13, således at den 30 dækker hele eller en væsentlig del af bredden af den over valsen førte posebane. I beholderen 20, der fortrinsvis er åben opadtil, er nedlagt en væge 21 eller tilsvarende organ af et hydrofilt materiale, og som kan udføres af en filtplade anbragt således, at den med sin ene kant dypper ned i be-35 holderen 20 og med sin anden kant hviler på omledervalsen 15.The apparatus for applying the adhesive liquid shown in the drawing is constituted by a container 20 disposed on the frame member 1 of the bag machine extending along the diverter roll 13 such that it covers all or a substantial part of the width of the bag web passed over the roll. In the container 20, which is preferably open upwardly, is laid a wick 21 or similar means of a hydrophilic material, and which can be made of a felt plate arranged so that with one edge it dips into the container 20 and with its second edge rests on the diverter roller 15.

Claims

To ensure that the felt plate, which, when it has absorbed liquid, is relatively soft, abuts the roll 13 over its entire length, it is conveniently arranged at its upper part by means of a number of notches 22, for example. with a spacing of approx. 20 mm made comb-shaped. In order to ensure even distribution of the liquid over the surface of the roll 13, it is kept in constant rotation. As the adhesive liquid, as mentioned above, water preferably added with a rinse aid is used, but it will be appreciated that other liquids of similar binding capacity, which can be passed from the container to the roller by hair tube action, can be used. The wall 21 may, in the case where the bag machine is not provided with a diverter roll 13, be designed for direct abutment against the bag web when it is guided to the position shown at 12 '. Claims. '

A method of rewinding a predetermined number of plastic bags assembled into a web, wherein the individual bags are separated by transverse perforations, characterized in that at least a portion of the web's last bag 20 prior to the rewinding is applied to a liquid.

Process according to claim 1, characterized in that water is added as a liquid with a rinse aid and which is applied in all or a substantial part of the width of the bag web.