CA2068755A1

CA2068755A1 - Method and apparatus for winding a web

Info

Publication number: CA2068755A1
Application number: CA 2068755
Authority: CA
Inventors: Gilles Petitjean; Neckel Pollinger; Bert Van Den Bedem; Jean-Luc Verheggen
Original assignee: Individual
Current assignee: BERT VAN DEN BEDEM; GILLES PEITIJEAN; GILLES PETITJEAN; JEAN-LUC VERHEGGEN; NECHEL POLLINGER; NECKEL POLLINGER
Priority date: 1991-05-17
Filing date: 1992-05-15
Publication date: 1992-11-18
Also published as: FR2676427B1; JP3276979B2; JPH05147787A; EP0514226A1; FR2676427A1

Abstract

TITLE

METHOD AND APPARATUS FOR WINDING A WEB
ABSTRACT
Apparatus is provided for automatic high-speed winding of a continuous web of thin film-like material onto a core to form a wound roll, in which the film is applied by a train of idling lay-on rolls consisting of first and second rolls arranged parallel to the said core and which, in the production position are applied against the roll being wound by separate urging means situated at each end of each roll and each acting on a respective pivoting arm one end of which carries a bearing on which the rolls are journaled and the other end of which pivots on a carriage that can be advanced and retracted along a guide path, enabling perfectly uniform wound rolls to be obtained.

Description

2~687~
. PE-0256 ~E
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MæTHOD AND APPARATUS FOR WINPI~G A W~B
q_ ~ :

.Thi~ lnventlon rel~es to an app~ratu3 ~or winding a oontlnuo~8 w~b of fllm mate~lsl onto a core driven ln . rot~tio~ by a spindle ~nd on~o ~hlah 3~1d we~ o~ fllm ~-~
1~ wound ln order to ro~m a oyllndrical wound roll by me~n~
of a tr~ln of lay-on roll~ for ~pplylng i~aid web ~o a ~ ~ld aore, sald train compri~lng ~irst Rn~ ~econd ldllng ! ' rolls arranged parallel to sald core the ~rst o~ s~id rull~ being p~rtlally surrounded, durlng wlndlng of ~aid l~ core~ ~y ~aid web and being dlspo~ed t~ngentlRlly with respec~ to ~ald seaond rcll while ~lrmly pressl~g ~aid web agaln~t the sur~ace t~ereof, and wlth res~ect to the outer sur~ace o~ the wound roll to wh~ch ~ald ~llm 19 applled.
. 2~Very numerous wlnding devlce~ arc known ln th~ art, i , ~uc~ apparatus belng used for wlndin~ ~hln web~ o~
ma~erlal~ ~uch a~ ~aper, pla~ic materlnl ~hlch ar~
supplied to u$er~i ~n roll form wound onto cyllndrlcal j cores wbiCh are ~enerally of 'ca~dboa~d. When extremely hin we~s are involved ln which ~he m~terl~l i3 ~enerally in the rorm ~f rilm or rllm-llke ma~erlal of a ~ i re$11ient and derormable mater~al ~uch ai~ plaistl¢i3, $t i ' is extremely dlrrl~ult to achieve re~ular ~$ndlng of ' ~ suoce~31ve layers the outer Yur~ce of whlch arc only ! 30 truly fl~t when the ~11~ ls under ten~ion. In3pectlon with t~e na~ed eye o~ roll~ o~ s~ch ~ilm always xeve~ls the presence o~ i~regularltle-~ produced during wlndl~g.
, .Addition~lly, the~e ls al~o a need ~o wlnd cQr~ln ; pla~tlc materlal~ ~hat h~ve been proeesse~ to ~orm thln ii 1 206~7~

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toar-re~i~tant f llm~ lnto a roll that can be u~ed directly a~d whl~h 15 nence brought to the approprlnto wldth af~e~ leavlng the pla~tlc matexl~l ~ilm productlon lin~.
One o~ the o~ects o~ ~18 lnventlon ls henc0 to provide winding apparatus ~or ~ s~rlp of film materlal ~or u~e dir~ctly ~ollowing the materlal production llne an~ whleh enables a regu~ariy-wound roll o~ ~llm to be . o~alnedr in whlch the wlndlng operat~ ons can be 1~ lniti~ted and monltored automatlcally through the use o~
controlled-pres8~re lay-on roll~ whlch ~aithfully ~ollow the growth ln dlamete~ of the wlnding ~oll ~n order to achleve regular appllca~ion o~ the ~ilm onto the o~ter surface of the windlng xol~, and whlch can nddltlonally 1~ be regula~ed ln po~ltion ~nd wlthdrawn.
Another cb~e¢t o~ the preaent lnventlon ~ to provide apparatus enabling sllt ~oll~ of ~hln film m~te~lal to be obtalned in a contl~uou~ production proces~ through the u3e Or wlndin~ ~pparatu~ whlch 1 Z~ hlghly accurate, robust and en~ures t~t completely reproducible ~nd rellable operation of ~11 lt~ compon~nt parts are obtalned~ leadlng to a gignl1c~nt roductlon ln malnt~nanc~ downtlme.
A f~rther ob~ect 1~ to lncrea~e productlon~ ~pecd~
~S ànd partlaula~ly speed up the operatlon~ o~ thre~d-up and change of windlng from one roll to anothe~ whlle slmultaneou~ly obtainlng hlgher product ylelds and qu~lity.
, It 1~ a ~urther ob~ect~ of the lnvcntlon to provlde windi~g appsratu~ wh~ch lnclude~ ~ set of feed roll~
that cooperate w~th me~ns for cuttlng the film and brlng ~t to the approprlate wldth ahead o~ the lay-on roll~ a8 well a~ ~ulta~le mean~ for evacuatlng offcut~ af~er autSlng.

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206~755 A ~u~ther ~lm of the lnven~lon la ~o provldo a wlndi~ me~od uslng ~ppnr~tu~ which on~ble~ the start of win~lng as well as changeover ~Lom one ~11~ roll to ~th~r to be achleved automntlcally.

In accordanc~ tO ~he lnventlon, ~pparatus 1B
, provlded f~r w~ndln~ ~ contlnuous web o~ fllm ~ t~rlal l~ o~to ~ Core driven ln rotatlon by ~ ~plndle and onto whi~h sal~ web o~ fllm ls wound ln order to *orm a cyllndrlcal wou~d roll by means o~ a train o~ lay-on rolls ior apply~ng ~aia web to a ~ld core, sald traln comprislng flrst and second idling rolls arranged l$ p~rallel to s~ld core ~he ~irs~ o~ sald roll~ b~lng partlally sur~ounde~ durlng wl~dlng o~ s~ld core, b~
~aid web and b~ln~ dlsposed tangentlally wlth re~peat to sald ~eaond roll whllo ~lsmly presslng said web aga~ ~st th~ 8urace ther.eo~ ~nd wlth re~pect to the ou~er ~faoe o~ the wound ~oll to Wh~ ch 8aid ~llm 19 ~ppl~od whereln, ln the ~lndlng posltlon, sald ~lr~t and second roll~ sre ~e~pectlvely ap~lled ~o the outer sur~sce of ~ald woun~ roll ~elng ~ormed on ~ald core and to sald ~ ~lrst roll ~y ~eparate urglng' me~n~ located at each end 25 ~f oach roll and eacn ac~ing on ~ reape~tlve p~votlng ~rm o~e ~nd Of whlch carrieR a bearlng allowlng rotatlon o ~ roll mounted therein and the oth~r end of whl4h plvot~ on a carria~e movable along a gu~ dlng suraae, ~ guldln~ sur~ce~ of each 0-r sald rolls belng ,0 mutually parallel and the movements of the t~o carrla~es roll belng synchron~zed by mecha~lcal synchronization means l~nklng ~ld two c~rriages.
i Accordlng to one ~e~ture, each o~ q~d ~rg~ ng means 18 adapted to act ~ the correspondlng pl~otl~ ar~ ln ..

. .

~l 20~g7~

order to reQlliently bia3 ~ to a po~l~lon of maximum angle o~ ~wlng whon sald ~ir~t or second rolls are not sub~ect to the re~pec~lve reaotlon ~orce~ respect~cly . provi~ed ~y ~ld wo~nd roll and by 3a~d f i~Bt lay-o~
roll.
Accord~ng to another ~eature, the urglng means con~i~ts o~ ~ pneumatlc cyllnder h~vln~ a pi3ton mov~ble thereln the rod of said piston pivotlng on sn ~xten~lon o~ J3aid pivo~ing arm while the othor end ol 3a~d 10' p~eumatlc cyllnder remote from sald rod pivots on the correspondlng carr~g~.
Accordlng to a ~urtner ~eature o~ the lnvent~on, ~n the posi~lo~ corre8pondlng to thre~d up or lnlt~ ntlon oÇ
wlnding, the carrlages of ~ald ~lrnt cylinder are l$ adapted to ~e dl8placed away from ~ald cyllndrlcal roll to a retracted po~itlon at whlch ~ald ~ rst l~y-on roll is no longer in contact with sald ~econd lay-on roll and wlth tbe ou~er 8urrace o Qsld cylindrical roll wh~roby a pa~sage ~etween ~ald 1r~t and second lay-on roll~ in 2~ created or allowlng introd~ctlon of t~e l~ader o~ the fllm to be wound. Thc carrlages of the second sald luy-on roll ar~ adapted to be held in po~itlon while ~heir pivotirlg arma are cau~ed to plvot to a positlon o~
~ maximum allowa~le ~wlng by ~ald urgin~ me~n~.
Aacording to another ~eature, whore ~ald app~r~tu~
includes ~everal oorea each arranged on one o~ the arms o~ a rotatable ~curret mearlE~, the carrl~g~s oÇ El2~lcl 1rst and said 3econd lay-on rolls are adapted to move along , their guldlng ~ur~nce~ to a retracted poaltlon romotc 30 from said wound roll to allow the arm~, carry~ng a sa~d ! ~ou~ roll or cor~ o~ ~ald turrct to rotate.
According to a further reature o~ the ~pp~ra~us ~or wlnding a web o~ 11m~ ~ld apparatu~ includex, ~ppl~cd to sald continuou~ we~ of ~llm ahead, con~idored ln t~

i ~875~

dlreation o~ aclv~ncement Or ~aid we~, Or sald 1r~ nd ~econd lay-on rolls, a traln o web eedlng and sl~ttlng rolls. Sald traln C~f web ~e~:ding and sllttinsl rollc~
c:omprises ~I thlrd roll provldlng tr~sl~sfer to snld second S lay--on rolly ~ ~ourth ~oll ~or ten~lonlng sald continuou~ w~ c;,~ f llm durln5~ cuttlng zlnd a ~ifth ~oll ~or ata~lllzing ~nd maintalnlng the web o~ ~ilm d~rlng auttlng t~ereof, ~ald third, ~ourth and ~lth rolls b~lng ~r~ll~ly placed~ in t21e productlon posltlon o~
lq 8aid app~ratus, ln R poRltion where they are sub~t~nt~ally vertlcally all~ned one above the other n~d mutually ~paced, aald web of fllm belng ~ound, prlor to engaging sald ~ccond lay-on roll, partlally over ~ald web-~eeding rollg ln alternate dlrectlon~ rrom o~e roll 15 to the next. At least one ~cnl~e moans la applied ~o sald web of f llm ~tretche~ between ~aid ~ourth and ~lfth roll~ .
Accorclln~ to yet another ~eatur~, the end beetrings of the thlrd~ f~ourth and f if ~h rolls aru each c:arrled by 20 a carrlage movable along a ~ubstantl~lly horl~ontal g~lidlng suxface arranged la~erully wlth re3pect to ~ald wound roll o fllm~ the two c~rrlages ~or each roll belng 8ynchronized by meohanlcal 3y~ehronlzlng mean~ a~d belng adaE)ted to be ~novable, *t leaa~ ~5 regard:s s~id 25 third and fi~th roll~, rrOm a posi~ion w~re t~ey nre advanoed toward~ 8~1d wound roll o~ rllm to a retracted position, i Accordlng ~o a ~urther ~eature of the ln~ent~n, ln ~he po~it~on corresponding to thruad-up or lnltiatlon o~

3!p windlngr the carrlnge~ o~ ~ald thlrd and ~lfth roll~ are mov~le along thelr guldlng ~urface3 ln order to approach s~ld wound roll to a ~ully-adv~nced Posltlon ~hat provlde~ a pas~age between ~ald advanced thl~d and 2~6~7~

fi~th ~oll~ snd 3al~ ~ourth roll, allowing lnt~ductlon o~ the leader o~ the ~ilm to be wound.
Accordln~ t~ ~nothe~ ~e~ture, the ~lve sald rollR
co~prlslng the t~o sald lay-on rolls and the three s~l~
web-~eeding roll8 have sub~Santlally the ~ame lengt~ and wherein the gu~dlng surf~ces f~r the carrlages of ~ld ~lve rolls ~re ~upported by two par~llel vortlcal platQ~
arran~ed at a ~pacing 8ubstantlally cor~espondlng to ~he l~n~th of ~aid roll~. S~ld two par~llel vertioal plates 1~ carry a beam ~rran~éd paral~el to ~aid ~ollB nnd at the ~ame level as ~ald ~ourth roll ~nd a~ the opposite s~de th~re~o to ~ wound roll of film~ ~aid hollow beam carrying ~t the upper portion thereo~ a knlfe means mounted on a mova~le a~rrler the po~i~ion o~ which oan 1~ be ad~u~ted both i~ the dlrection par~llcl to the ~xl~
of said beam 3n~ in the dlrection perpendl~ular t~ereto ~nd whereln ~al~ kn~e mean~ ls applied to 3aid f~lm Btretc~e~ ~e~ween s~ld ~ourth ~nd fifth roll~ ln t~e . region o~ ~aid fl~th roll. SA1~ beam c~rrlea ~ least 2p one tube ~or collectlng the ~trlp o~ trlm cut rom 3ald continuou~ we~ o~ $11m by s~ld ~ld knl~e moan~. Sald trim collectlng ~ube i~ c~rrlod ~ub~tantially horizon~ally below 8ald be~m~ ~ld tube havlng an lnlot ~r said trlm ln the ~orm o~ ~ mouthplece th~t open3 ~5 ~low 9~ ourth roll. S~ld tube can lnalude chopplng means l~r ~ld trim ~fter ln~roductlon ther~o~ into s~ld tube.
Ac~ordlng to yet a further feature, the extreme posltion~ o t~e carrlages Or 8ald ~ir~t, s~cond, third, ~ourth and fl~th rolls on thelr re~pectlve guldlng ~ur~ace~ ~re ad~u~ta~le manually by movlng the pos~tio~
o~ a stop me~n3 ooperatlng wlth mean~ for ~eneratin~ an el~ctrlcal. signal ~or controlllng a dr~v~ moto~ ~or provldinq synchroni~ed ~placement of the t~o carri~ges i 2~875~

o~ e~ch ~ald roll. ~echanical synchLonlzlng mean3 ~o~
the t~o aarrlage~ of each o~ sald f~rst, aecond, thlrd, ~ourth and ~l~th rolls lnclude mechanical synchronl~atlon lnterrupting me~ns ~clupted to enahl~ th~
po~ltlon one o~ sal~ two ca~rlage3 connected to ~ld ~ynchronlz-ng me~ns to be ad~u8ted ~ndependently of the other. The flrst roll 18 covered wit~ ~n ol~s~omeric ma~e~lal, whlle the second roll 18 u highl~-rlgld ~lld roll ha~ing a ¢hrome pl~ted flnlsh ~nd sald thlrd, lq fourth and ~i~th roll3 ura in alumlnum wlth a ~lack anodlzed finlsh.
~ he lnve~tion also provides a method ~or wlndlng contl~uou~ web o~ film material onto ~ core drl~en ~n . rot~lon by ~ spindlo and onto whlch s~ld web ~s wound lS in order to constltut~ a cyllndria~l wound roll by means of ~ traln o~ l~y-on ~ilm application rolls oon~lstlng o$ flrst and -~econd rolls pres~ln~ s~ld web o~ lllm partlally wound ~round ~uld fir~t roll respectlvely ~galnst the outer su~faoe o~ sAid wo~nd roll ~nd agalnst 2D ~d flrat roll~ ea~h one of the end bosrlngs o~ the fir3~ and sooond roll~ are mounted on n plvot ~ ~g arm carried by a carrla~e ~vable on a guldln~ ~u~aoe ~nd the movement~ Qf ~he two carria~cs of each roll being ~ynchronlzed, each o~ sald ar'm3 l~ ~ctod on by lndivldual urglng means to c~uso plvotlng thereof whereby ~aid flr~t roll l~ ~rged agaln~t said wound roll of ~llm and sald ~eoond roll 1B urged agalnst ~id ~lr3t roll~ and in ord~r to ln~roduce said wcb onto ~ald core prior to said windlng oper~tion, t~e two carrlage8 0Ç
~0 ~aid first ~oll ~re retracted on their guld~ng 3ur$aces away from sald core ln order to establlsh a p~sags ~et~een sald flrst and ~econd ~olls thro~gh wh~ ch the end o~ 8ald web of ~llm to be wQund i~ introduaod and whe~eln berore the start o~ wlndlng, S~e s~ld c~rrl~ge8 .

'I 2~6~7~

are returned to ~helr ~tarting poslt~on ln order to pre~ ~id web Or film a~lngt said wound ~oll a~d onto ~ld ~irst roll. Wlth several core~ be 3 ng ~a~h ~rra~ged 0~ one arm o~ a revolving turr~t, prlor to rota~lo~ o~
~id ~urr~t~ the carrlages o~ ~ald ~lr~t and second roll~ are ret~acte~ on the~r guldlng sur~aCe~ ln order to move them ~way ~rom said ~oll o~ ~llm ~o p~ovlde a free pa3sag~ ~o~ ~n arm lo~ded with a core or a wound roll o~ ~llm o sald turret.
1~ Accordlng to another ~eature o~ the method for w~ndlng a web o ~il~ in w~lch on~o ~ald web of ~ilm, a train of web ~eed and guldlng roll~ o~er whlch aald web passes ln alternate dlrection~ 1B provided ahead of sald , lay-on ~ilm applica~lo~ rolls, each one o the end lS bearlngs o~ ~ lea~t one of two ~lternate o~ ~ald web feed ~nd guldlng rolls ls mounted on a movable c~rrlag~
movi~g llnearly on a guldin~ ~urface in mecha~lcal 8ynchronlz~tlon wlth the other o~ the ~wo csrrlagos o~
. each o~ -~ald roll~, sal~ alternate lndlvidual rolls 2~ belng displaced throug~ moving o~ the c~rriage~ th~reof on ~ald ~ulding sur~ace~ ln order to bring them ~109e to ~ald wound ~oll of ~11~ and ~o open up a p~ssage between a~ld alternate rolls throu~h whlch the l~ador end o$ a web to be wound 1~ lntroduce~ and wher~ln, a*ter the 25 ~tart oS windin~ said carrl~gea ~re returned ~o thelr st~rtlng po~ltion ln order to bLing said web o$ ~ilm in~o contact with ~ald ~eed ~nd guldlng rolls.
O~her ~ub~ects~ ~eatu~e~ and ~dv~n~age3 of ~he lnvent~on will beaome more cl~ar from ~he de~crlptlon 30 that ~ollowR of various embodlments o~ the lnventlon, provided by ~y o~ non~llmltlng ex~mples and wlth reference to the at~uGhed d~awl~s.

2~7~

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In the drawln~8:
Figu~ chematlc ~lde vl~w lllu3tratlng tho . wln~lng app~ra~us of ~he lnventlon ln the normal 5 p~o~uction po~ltion, in other word~ in the proces3 of wlndlng f~ lm onto a core to ~orm a roll.
Figure 2 ls a~ e~d vlew ln per~pectlve o part o~
th~ ~pp~r~tus 0~ Flguse 1.
. Figu~e 3 i~ a perspectlve vlew simllar to ~iguse 2 lq ~ut viewe~ from lnQide and ~103er tO ~he ~r end thereo~
and ~rom a ~llghtly dif~eren~ angle enablln~ the roll drlYing ~n~ s~uldlng me~hanlsm~s to ~e seen in grea~er detail.
~ Flgure 4 i$ ~ 80hema~ic Ylde vlew o~ the apparatus Bimilar to Figure 1 ~ut on a slightly reduced ~cale ~nd i11URtrating the po~l~lon o~ the varlou~ pnrta dur~g initl~l thre~d-up.
Flgure S i8 a rear vlew ~howlng the ~llm cutt~ng or 81ittlng arrangemen~ o~ the appax~tus ln Flgure 1.
2~ Fi~u~e 6 ls a more detalled alde vlew on n l~rger ~c~le o~ part of Flgure 5 showlng the ~llm slittlng and trlm or offcu~ removal means of the ~ppar~tu~ 1~ Flgure 1, ~ well as the po~ltlon of the~e means wlth respeat to the throe upper ~runBrer ~oll~ e~ the app~ratua.
Figure 7 show~ in a schematlo alde vlew ~lmllar to Fi~ure ~ the windlng apparatua o~ Flgure 1 with wlndlng o~ one roll completed and the tr~na~er roll~ of the appara~us retracted ~o allow th~ turr~t to rotate and re~cly to wind a new oore.
Figur~ 8 ~now~ the devlce of E~lgure 7 at the ~ nstant when wlndlng o~ a complete roll ha~ been terminated and windlng of ~ ~reQ~ core l~ g~artlng.

1 206~7~5 With rererence ~o Flgure 1 which la ~ ~lde v~w o~
the complete wlndlng apparatu~ 1 f or a ~trlp o~ ~llm 2 ~f ~ mnteri~l sl~lta~le ~or rormlng thln or extremoly thln ~tr~pB of ~ilm~ uch a~ polye~ter plagtic mater~al ~ilm, it will be seen that the wlnding apparatus con~lYts es~entlnlly or a turret a~3emb1y 3 and an a~embly ~ Por supportlng the varlou~ rolls that ~eed lQ and apply the ~lm 2, ~nd trim lt to th~ npp~oprlate width. The turret 3 carrle~ ~n as~em~ly 9 of lndexed arms 1~ and 1~ onto which empty co~es 6, generally made o~ cardboard, can be ritted. A core 6 i~ drlven ~n rotation by rot~ting th~ ~pproprl~te splndlel here 1~ splndle 13~ by driving mean~ which are not shown, ~or wl~d~ng ~ film wound roll 5. Arm 11 i~ carrylng an e~p~y core 6 on lt~ 8plndle 15, the core on arm 12 1~
being wound and arm 10 1~ carrying o~ lts splndle 14 a wound xoll 5 that i~ ready for remov~l o~ the turret 2P will be ~e~erred to by tho term "wound roll" regardle~
of whether wlndlng 1~ finished~ only ~tartlng, or ln progre~.
The tu~ret a8~emb1y 3 ~ur~her oomprlse~ a ~rame 7 ~ ~ecured to a ba-~epl~te B carry~ng the 30~ 3 o~ ~rms 10 ll, 12 dl~t~lbutod regularly around a ~ppor~ axi-~ 9a secured to frame 7. The ~et 9 o ~rm3 ~n rotato around axi~ 9~ ln order to move the roll~ 5 ~ro~ a wlndln~
po~ltion on ~plndle 13 to an unloadlng posltion on ~pindle 14. Ater removal or a roll 5, ~ new core 6 can ~0 be mounted on arm 10. Consldering the ~a~e o~ a ~ur~et with thrse arm~ 10~ 11, 1~, arm 10 wlll move to ~n upper ~t~n~by posltlon 11 ~ft~r rotatlng ~bout ~xl~
ObviQu8ly~ lt wo~ld ~e po~ible to uQe a turret ass~mbly .... ~_ 2~7~

3 havlng two dl~m~trically OppO5~ ng ac~lve ~xms, or even provlde~ uith more than three arm~.
Th~ wlnd~ng appara~u~ also lncludes an arc~te enveloper roll arm system 16 whlch cooper~te~ ln 5, automatlc roll wlndlng c~angeover ~nd fllm cu~tln~ and ~e~a~ 1~ Or it~ operation wlll be g~von below.
The as~embly 4 ~or supportlng t~e various roll~
that feed and ~pply the film 2 15 ~upp~rt~ by t~o parMllel vertlc~l columns or plates 17 an~ 1~ whlch ~re lU e~sentlally 81mllar ~n de~lgn - only aol~mn 17 18 fihOWn ln Flgure 1~ bo~h belny 3~0wn in Flgure 2 - whlch ~re mounted on a baseplate and malnt~lned at a determ~ned ~pacing~ e~sentlally dlctated by the wldth of the ~ilm to be wound~ by cross mem~ers whlch Rre not ~ho~n. The 1~ upper top half of the plates 17 ~nd 18 c~rry gulding ~urfaces fosmed by horlzontal lln~r gulde3 lg, 20, 21, 22~ 23 along whlCh corre~pondlng carrlage~ ln tho orm ; o~ car~lage~ 191 to Z3a and l9b to 23~ c~rrled ln the . llnear gulde~ o~ ~he reapeotlve plates 17 and 19 ~re able to roll or ~llde.
~ ach one of the 81idlng aarrier~ is fitted wlth an end bearlng me~n8 for one o~ the trans~er roll~ or tho strip oi illm. A~ ~hown ln Flgure 1, the~e tran3fer roll~ oan be con81~ered a~ con~ti~utlng two tr~lnn or ~5 SetB the functlon~ Or which ar~ genernlly dl~eront. A
dual ~rackin~ lay-on roll tr~n or ge~r 2~ con~lsts o~ a ~lr~t a~tu~l lay-on roll 2S con~i~ting, *or example, o~
a hollow metal tube provided wlth ~n el~tomer co~er~n~
on it~ outer ~urface and w~ioh~ in t~e produotlon~ ~ar-forward windlng posltion ~hown ln Fig~re 1~ is~ur~ounded over ~bout l~OD or lt~ ~ur~ace by the ~trlp of fllm 2 and ~8 applled tangenti~lly along a parallel line (actu~lly a narrow ~trlp) onto tho o~er ~ur~aoe o~
the roll 5 ~ or o~ the core 6~ ~t t~e ~t~rt o~ w~n~lng.

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2 ~

~he dual tr~ckln~ roll train 24 lncludes a ~econd rolL
26 provldlng tracXlng whlch ls ~pplied tangentlally to the flr~t roll 25 and whlch, ~or example, conslsts o~ a highly rl~id rnller whlch i~ chrome plated on lts outer surf~ae to re~is~ abraslon and to p~ovide optlmum ~llm spreadlng.
~ 0118 25 and 26 rotate idly, l.e., non-drlven, on thelr corres~ondlng end bearings. In Flg~re 2, 1~ can be 8een ho~ tbe end portlons 25b a~d ~6b o the-ee two 1~ roll~ ar~ ~ournaled in t~ese end bearlng3 at one of the ends of the rolls; the bearlng end~ 2Ba ~nd 30a of the tw~ rollR can be ~een ln ~l~ure 3. The end bear~ng3 of rolls 25 and 26 are not d~ rectly c~rrled by ~he slidlng carrlers supported on ~he line~r guides but rather vla 1~ plvotin~ armS 27 tO 30 on~ end of whlch carried a be~r~ng ~or ~ roll ~roll 25 belng c~rrled by arm~ 27 and 2~ and roll 26 hy a~m~ 29 and 30) the other end of whl~h piVots on one o~ the ~lldlng carrier~ nd l9b for : a~m~ 27 and 28 ~nd 20a ~nd 20b ~or arm~ 29 and 30).
2~ In order to en~ure correct qui~ln~ of rO119 2S and 26~ the two ~lldlng carrler~ of a glven roll belng mova~le along two corre~ponding llno~r guide~ 19 and 20, these gu~des are arranged parallel to each otber on the two ~erticul plates 17 and 18. T~ese slldlnq carr~ers ~5 th~t ~upport ~he arms are advanced ~nd retr~oted whlle slldlng along th~lr r~levant llnenr qulde~, by lead screws running parallel ~o the llnear guides, rot~t~on o~ which e~uses the carrier~ to advance or retr~at. In or~e~ to ens~r~ the axe~ o~ the tw~ soll~ 25 and 26 are ~0 con~tan~ly kept par~llel to each otber ~nd to the wlndlng gplndle (wlndlng spindle 5, core 6, ~nd thelr support arms 13, 14~ 15), di-~placement of the two slldlng carriers of a glven ~ylinder are meahanlcally 4ynchroni~ed by ~ynchronizin~ me~n~ th~ ll~k two ._ 2~7~

lidln~ carrler~. The ~ynchron~zlnq meana ure~ ~or exnmple~ constltuted ~or slld~ng carriers l9a ~nd lgb ol roll 25~ by a synchronlzatlon shart 31 runnlng ~etweon the twO vertical plate~ 17 arld 18 ~or connected two ~evel-gear gear~oxes 31a and 31b ~only gearbox 31a c~n be ~een in Flgure~ 1 and 2) linked me~h~nlcally by . gearlng mean~ or the llke to the corre8pondlng load sarew ~32 ~or ~ear~ox 31a) thAt dl~pl~ce~ the ~lidlng oarrler l~a ~or l9b at the otber end). 8crew 32, w~lle i6 generally con~tltuted ~y a low frlatlon ball screw, i3 ar~anged ~tr~c~ly parallel to the llnear gulde 19.
For slidlng carrler 20a~ Flg-~r~ 1 Bhows ~he geur~ox 33a me~hanlcally lln~ed to a lead 8cro~ 33 p~r~llcl to linear gulde 20.
The rol~s 25 ~nd ~6 ~re blasod by thelr aorrespondlng plvoti~g arms 27, 28 and 29, 30 ~or applylng them ~espectlvely onto roll 5 and roll 25 as ~
r~ult o~ swlnglng o~ the plvotln~ arm~ ln the cloo~wl~e : direction by the applicatlon o force ~rom urging menns ~nioh cHn ~on~l~t Or ~pring~. In ordor to obtaln a ` ~ubstantially constant loading on the rolls 25 snd 26, ! the urging meang ~or each arm shown ln Figure 3 conR~st of a pnRuma~lc actuato~ 34 or 35 con~i~tlng of ~ pla~on moving ln a cylinder ~etwcen éxtreme ~butm~nt po~ltlon~
2~ and int~ral with ~ pi~ton rod 36, 37 pro~eotlng externally. In the embodiment ~hown ln F~gure 3, each aGtuAtor pivot8 at ono end o~ lts cyllndrlcal body, for exAmple at 35~ ~or actuator 35~ on tho aorre~pondin~
slidlng currler ~here ~lidlng carrier 20A) whlch 3;0 support~ lt whlle lt~ piston rod 36 or 37 ~lvots by means or a ~orked ~rm and ~ plvot pln ~at 37~ on sn exten~ion 38 o~ ~rm 30 for actuator 35). ~t w~ll be 3een that the pl~ton and the pl~ton rod ~re only ~ble to have ~ llm~ted stroke wh~n the pi~ton 18 at the bottom .

.... ~

. 2~6~75~

0~ the ayll~der Or the aotuator where~y, a~ ~oon ~ tho ~lr~t and~or ~econd roll~g3 cease to ~e ln ¢ontact w~th ~heir correspondlng supportlng ~oll ~he roll 5 ln the proce~s Or b~3ing wound or lay-on roll 25~ ~t come~ to a 5 stop posltlon wl ~out contact, b~lng malntalned by lt3 pl~ton .
A aecond traln o~ rolls 24~ provlding ~n S-3haped path *or ~ilm trans~er and ~preadlng ~ore ~nd after sllttin~ 3 provicled ahead of the du~l 'crnck~ng lay-on lQ roll traln and consl~t~ 0~ three rolls which, ln the wlnding positlon 8hown in Flgure 1, lay substantlnlly one on top o~ the other and mutually sp~ced ~om each other. ~ne len~th of the Rpan of web ~etw~en each of t~e~e roll~ ~a~ been ~ound to glve t~e best re~ults when 15 thls length ls le~s than one-quarter of the wldth o~ the rilm~ sn~ is p~eferably one- eighth ~ this wldth. Th~
roll traln c0~81~ts o~ a thlrd roll 39 provldlng tran~fer ~o the aecond roll 26 and having ~ ~mo~th sur~ce, ~or exam~le, ln ~lack anodlzed alumlnum, for Zp en-quring good adherence to the ~trip o~ fllm 2. ~hl~
thlrd roll 39 i~ mou~ed ldle on two end bearlngs oach one of whlch i~ c~rrled b~ a re~pectlve carr~agc 3uch a9 a slidlng carrler Zla ~nd 21b Qlld~g in n g~ldlng ~ur~ace such ~a llne~r guldes'21. The ætr~p of ~llm 2 pa~e~ over a portlon o~ the ~urfaoo o~ ~hl~ th~rd cyllnder 39 ln ~he ~ame diFectlon a3 ov~r ~he s~cond cyl~nder 26.
The thir~l roll 39 i6 preceded, ~ll:h re3pect. tc:, the dlrection or ~dvance of 11m 2~ by a ~ourth ~oll 40 the ~unction o~ whlch 1~ ~o ensure fllm spreadlng n~d tr~ln~l~er rollowlng trlm sl~ttlng of the f~ilm. ~hlæ
fourth ~oll 40 1~ o employed for me~3urcment o~ tbe ~ilm tension, the ~*arlng~ thereo~ belng mounted at eao~
~ide in sult~ble ten~lon measurlng cells, 3uch ~8 a load .

. _ 2~6875~

cell~ ln order to provlde ~ signal to a t0n~10n control module. ~he roll qO i~ mounted ldle ln t~e s~ld - ~earings e~ch one of whlch 1~ ~ltted onto a ~e3pectlve Blldlng cArrler 2~a and 22b whlch slide~ ln lin~ar gulde~ 22. ~h~ ~trlp o~ ~llm 2 p~s-~es o~cr thl~ 80urth ~oll 40 ln t~e opposite dlrectlon to th~t o~ the thlrd and ~econ~ rolls 39 and 26, and ln the ~ame dlreotlon ~8 ovor the Pir~t roll 25.
The four~h roll 40 18 preceded by a ~lf~h roll 40 the ~unCt~on o~-whlch ls to ~pread the ~ilm ~nd ~ta~illze lt prlor ~o trlm ~llttin~. Thl~ ~lfth roll io mounted ldl~ on two end be~rlng~ each on~ o~ whlch i8 hou~d by the ~e~pective slldln~ c~rrler 23~ ~nd 23 ' movlng ln linear guldeg 23. ~he s~rlp o~ fllm 2 19 lS wrapped nround t~i8 flfth roll 41 in the ~ame dlrectlon a~ over roll~ 26 and 39 arter leaving a ~eed roll 41n o~
larger diameter than ~he ~ive rolls ~or ~ lm feeding And applying strlp 2 be~ore lts winding onto roll of ~llm 5.
The two slldln~ carrier~ of ~ach oPe o~ rolls 39 40~ 41 o~ thls second S-~haped roll tr~ln can move hori~on~ally ~n parallel llnear guldes wlth synchronised movement~ ~u~t llke tho~e of the ~wo dual track~ng rolls 25 and 26 of the fir~t roll train. Th~a ; synchronizatlon meBnB for the~two 311~1ng carrler~ o~
2~ givon roll con~ist~ a~ already described for roll 25, o~
a ~ync~ronlzlng s~rt whloh llnk~ ~ee oynahronlzlng ~h~t 42, 43~ 44 cGrrespon~lng to roll~ 39, 40 ~nd 41 re~pectlvely~ two gearboxe~ each mounted on one o~ the , ve~lcal plates 17 or 18, the gearboxes being linked by 3P mean~ o~ a rotating lead Ycrew to the cor~eopondlng ~lidlng carrier~. In Flgure~ 1 ~nd 3, ge~rboxe3 42u~
~3a and 44a have been shown mounted on ver~lcal plate 17 and respectively corre~pon~lng ~o ~ynchronl~lng sha~ts 42~ 43 and 44. In order to enable ~he ~ta~tin~ po~tlon .

2~87~

o~ a slldln~ c~xrler to be ln~lvidually ad~ust~d~
synchronlzl~g sha~ts 42 to 44 ~gether with the aynohr~l~in~ ~h~ft~ of the ~lr ~ two rolls 25 and 26, are provldo~ wlth ~ mechanlcul meanB ~or lnterrupt'ng ~ynchroniz~tlon, th~e, for ~xample, conslst~ng of ~
~o~41e t~readed ~leeve w~ich ~oln~ t~o portions o~ n ~ynchronlzln~ sh~t. In Flgureg 1 ~nd 3, such ~leeve~
~5~ 46~ ~7 and 4B are lllu~trated the~e be~ng re~pectivel~ provlded on synohronizing shAft3 31, 42, 43~ 44. Such a ~leeve c~n be rotated together w~th one sln~le portion o~ a ~ynchro"l~lng sha~t and then onae ~galn locked with re~pect to the other portion of the ~h~ft ln order to enable one o~ the roll slldlng carrlerA tO be shlrted wlth re~pect to ~h~ other ~llding lS carrler~ and ~hen~ after the sleeve ha~ ~een locked onto tne synohro~izing ~ha~t, to en~ure ~ynch~onized movement o~ the two ~lidlng carxle~s of A glven roll.
It wlll be notlced ln Flgure 1 that ~lidi~g carr~e~
22a which lncorporates one o~ the be~rlnga of the ~ourth roll 40 ~aces ~he ~urret 3 carrylng the wound rolls 5 rather than belng ~lrected away there$rom. ~hls reverse ~rranqement o slidlng oarrler 22a ~and of ~lldln~
; carrier 22~ whlch 1~ not lllustrated) comes a~out due to the ract ~hat ~llding carrler 22a only movoa ~y sm~ll amounts, malnly for ad~ustment purpose~, unllke the other slldln~ carrlers, and al80 as a result of th~ faot that lt i8 nece~ary tO house a hollow be~m 49 of relatively large dlameeer, arran~ed ln the tran~verse sen~e between vertloal plate~ 17 and 1~, behlnd the 30 ~ourth roll 40. The purpose o th~ hollow be~m 49 1.8 dlacus~ed ln detail below. Beore le~vlng the roll mountlng arranqe~nents, lt should ~:>e mentloned thAt movement of the roll slidlng carrlers can be ~chloved by tl~e u2~0 o~ s~cepplng e~ec~rlc motors c>r d~al-speed .

~687~

pneumatic motor~ coupled to t~e ~bove ~a~d ge~rboxe~, 1 wh~ch~ a~ter ~vement o~ a roll~ th~ alr feed ~ ~
~ n~cerruptea and the ~lldlng carsle~:s ~re m~int~lr~sd ln place by a braXe mounte~ on ~he pneumat~c motor or by an lrrever~lble transml~slon 8y8tem.
The h~llow beam 49 1~ used to ~upport o~e o~
several knl~e~ or cuttlng elements 50, the~e belng employed to sllt the ~llm 2, ~nd are lllustrated ln Plgure~ 5 and 6 ln rear and cros~ - ~ectiona~ ~lews on differlng ~cales. In Flgure 5, the hollow beam 49 c~n be seen linklng the two vertica~ plates 17, ~nd 1~, this carrying ~or, ~or example~ two mova~le cutting carrlage~
51 and 52 whlch can move by rolllng on rollers 53 at the , upper portlon ~ beam 49 th~ough rotatlon of ~
lS di~placing and ad~u~tlng screw 54 whLoh 18 p~rallel to the beam 4g and csn con3~t o two co~pled h~lve~, one of which ls le~t-threaded an~ the other rlght-threaded.
Thls ~crew 54 can be oau~ed to rotate m~nually by turning an ad~ug~ment handle 55 whlch acts mec~anlc~lly on ~he ~crew 54 through a gearbox S6. Llke for the lead 8crew~ o~ the ~lidlng carrlers~ each of the cutt~ng carrlageR Sl or 52 can be moved~ through a de-~ynchron~ zatlon 81ee~e 57, l~dependently o~ the o~her for adj~s~ment purp~es, tne cor~e~ponding ~n~ve3 2~ normally belng set to remove a trlm or o~fcut ~t the two ~ldes o~ the advancing web.
Wlth reference tO Flgure 6, thi~ shows the cuttln~
oarrlage 52 carryln~ an upper sliding gulde ~a on wh~ch a knife 811din~ carrler 60 1~ able to move trAna~ersally 3p to the longi~udln~l axl3 of beam 49 by mean~ of mo~ing means such as a handle 59 ln order to brlng the c~t~lng edge 61 of the relevant knlfe 50 lnto contact wlth the film 2 whlch 1~ tensioned between thè ~our~h cylindes 40 and the fif~h cyli~de~ 41. The knife sliding carrl~r 13 ~:1 20~7 adv~noed or retrRcted ~y ~ ~ho~-stroke pneum~tlc table ~or the purpo~e o~ enterln~ and wlthdrawi~g the knlie 50 ~rom ~he ~ilm 2. The ~nife holder ~a~ be retrr~cted $rom the rear o~ ~he apparatus well aw~y ~rom tne ilm wlndlng mechanlsm~ allowlng it to be repl~ce~ wlthout dlsturb~n~ the windi.ng ~etup.
E~C~ knl~e ~old~r 51 or 52 carrle~, ~la uprights 62 and 63 which ~urround be~m ~ectlon 49, a tube 64 f~r . collecting an o~rcut strip 65 o~ ~llm 2 ~hl~ can also be seen ln Figures ~ ~nd 3) . The of~cut o~ trlm atrip ! 65 ls formed lmmedlately downs~ream ~ ~ife SO nnd pA88e8 over t~e ~ourtb roller ~0 ln o~der ~o ~ollow a c~rved path into the mouth 66 of a trim colleotin~ tube 6~, the lnlet mout~ opening below the fourth cylinder 40. ~e trlm collection ~u~e 64 i~ norm~ ub~ect to pneumatlc suctlon bu~ ln order to more readlly d~w o~f the 3trlp o~ trim 65~ the collec~lon tube 64 13 a~soclated wlth a cuttlng ~nlfe 67 operatlng ln the : lo~glt~dlnal sen~e which cuts the leadlng end o~ the o~f~ut strip~ enablln~ it to be re~dlly lntrod~oed in~o tube 64 ~rom whence lt 1~ read~ly drawn o~ and oarrled to a storage ~nd rec~cllng circult ater pa~s~ng throu~h shredder ~an or chopper aom~on to all the tr~m collectlon tu~es and whlah l~ ~ot ~hown ln tho dr~w~n~.
nlt~ ~e~erenoe to Flgure 3, ad~u~table stop~ S~tP3 68 ~nd 69 on llnea~ g~lide 20~ stop~ 79, 71 und 72 on the respeetive llnear ~lde~ 20~ 21~ 22) ~re ~hown 3ecured onto the 1~ near guldes of vertlcal pla~e 17 and the~e are de~ gned to cc,oper~e with a cont~ct o~ an 3~ electrical and~or electronic: swl1;ch mean:~ ~or stopplng ~he drlve motors whlch de~ermlne the movement of the two ~lldlng carrlers for each roll. In Flgure 3, tho txansmlsslon mechani3m~ 73 ~nd 74 f~r d~l~lng ~ha~t~ 43 ~nd 4~ ~or li~lng ~nd ~imuit~neou~ly drlv~rg re~peotlve ' ;

2~7~

p~lr~ o~ ~lldlng carrlers 22~ 22b and 23a, 23b can bo seen. ~he drive motorg ~not ~hownt for auch mechn~l~ms are, ~or example, ~langed onto the ge~rboxes ~uch as 43 ~nd 44~ ln the ex~m~le ~hown. Flguro 3 nl~o ~hows g swltch me~n~ 75 mount~d on ~lldlng ca~rler 23a which 1~
d~sl~n~d to cooperate wl~h gtop 72 in order to brlng to n sha~t the moto~ that drlve~ the glldlng c~rrlers 23a ~nd 23b provldlng ~he horlzontal movement of the fifth roller 41. By ad~u~ting the po~ltion o~ the stops 68 ~o 72 on the llnear gulde~ or on the vertlc~l plntea~ lt i~
pos-~lble to ~tabli-~h an automatlc stopplng posltion o~
t~e ~lld~ng Garrlers for e~ch roll .
Tlle opera~lon o$ the ~llm windln~ app~ratu~ wlll now be descrlbed with reference to Flgure 1 whlch ~ho~3 ~he apparatu~ ln the productlon~ ln other word~ ln thc windin~, ~osltlon, to Figure 4 which show~ the ~pp~r~tus lnto positlon where wlndlng 1~ about to ~t~rt and wlth r~*erenae to Flgure~ 7 and B whlch ~how thc sa~e apparatu~ respectively in a posltion where ~utom~tlc ch~ngeover to wlndlng another roll lo oacurrlng~ ~nd lnally the appar~tus at automatlc Fe8~rting of windln~
on ~ new core.
Con~ld~rlng ~lrst Flgure ~ whioh alao lll~str~ten the thread-up operation, and oompuring it with Flgur~ 1 showln~ t~e apparatus d~ring norm~l produc~lon wlndlng~
sllding carrier~ l9a and l~b o~ the flr~t roll 25 aro moved by thelr respec~lve drlve mOtOrD to ~ wlthdruwn posltlon ~n whioh the f~rst roll~ lay-on roll 25~ le no longer ln conta~t wlth the 8econd roll~ traekln~ ~oll 3~ 261 and with the outer sur~ce o~ the co~e 6 o~ ~ roll to b~ wound~ the arm 11 o~ the turret ~av~n~ rotated with respéct to the pOBitiOn ~hown in Flgure 1. A wldc pass~ge 76 h~ thus been opened up between the f~
~oll 25 and the ~econd roll 26 the slidlng c~rrler~ 20 .

20687~

~nd 20b of whic~ have not moved. ~he pl~ton o~ actuator 35 has now reach~d lt~ xtop po~lt~on ~nd rotatlon o~ ~he plvotlng arms 29 and 30 has ceased ln order to . immo~ill~e ~he ~econd roll 26 ln the positlon ~hown ln a Flgure 4~ ~h~ ~liding carrler~ 21a and 21~ and 23u and 23b ~r the r~sp~ctlve ~hlrd ~nd flfth roll~ 39 and 40 are advanced by ~h~lr drlve motor~ ~the dr~wln~ show motor 73 ~or the ~lrth roll 41~ ln order to ~dopt the po~ltion ~hown ~n Flgure 4 ~nd to provlde a clcar 1~ pa~B~ge ~6 extendlng to the top of the apparatus.
A rigld 11m gulde 78 whlch i~ mov~ble ln the vertical dlr~ion as lllustrated ln Flgure 4, and whlch is normally retracted durlng productlon~ 1~ then lowered : to the po8itlon illust~ated ln Flgure 4 at which lt~
dl8ch~rge end ~ close to the rear outer ~urfnce o~ a pr~vlou~ly mounted core 6, ~he pa~age 76 p~ovlded by retracti~ of rol~ 1 and a~v~nce of rolls 3 and 5 allowlng the g~ide or thread-up tube ~8 to p~s wlthout impediment. Clo~eness to the coro~ or to a part~lly-2~ wound rllm ~ur~aGo, lx pref~rably detectod ~y proxlmlty~wl~oh mean~ which h~lt ~ tB downw~rd movement. It c~n thus npproaoh the core vory cloBely~ The appar~tus 13 : now in ~ posltlon at whlch actual threud-up can start.
, The leader 77 o~ ~llm 2 i3 blown through the thread-up gulde 78 b~ a blowlng tube 69 and the leader 77 ls caught by the core 6 whlch can be electro~
~tatically charged i~ nece3~ary. Other manners of attractln~ the le~der ~o the oore may be u3ed such ns , introductlon of ~lne droplot~ 77a of a 11~uld such na water ln an nlr stream by me~n~ sltu~ted cl~se to the core whlch are not lllustrated, lead~ ng to the productlo~ o~ *ine ~roplets on the sur*aco o~ the fllm 2 w~lich aets as a hort of adheslve between th~ core 6 and the ~ilm 2 or between two uuperposed layer3 of ~llm 2.

20~875~

When the leader 77 of ~ilm 2 h~ been o~ught by tbe core 6 tO be wound~ ~he rl~ld 11m gulde os thread-up tube 78 1~ r~tracted and the ~llm 19 l~ld onto the largo dl~meter reed ~oll 41a~ an~ the ~i~th ~nd thl~d rolls, $ 39 and 41, re~pectlvely~ are retracted to ~helr ~ur rea~
posltlons by oper~tin~ tbeir regpeotive motors while the fir~t ro}l 2~ i8 advanced to lt forw~rd po~tlon to adopt the po~ltlons for normal productlon ~unnlng lllu8trated ln Flgure 1 or rathe~ in ~lgure 8 becau~e 1~ only the startlng layer o~ ~ilm~ and no~ a plurality of layer~ ha~ b~en wound onto core ~ ~nd the plvotln~
arms 27-30 are in the lower po-~ltlon, us ~hown in Flgure 8. I~ the fllm 1 to be sl~t or ~dge trlmmed, the ~litting Xni~eY S0 are ~d~anced, poasibly ~fter wlndln~
of the film 2 onto ~he core 6 ha~ start~d, t~ the poaltlon lllustr~ted ln Flgu~e 6.
Productlon of a roll 5 now starts ~nd the trlm~ 65 lf 81~ttln~ 1~ employed~ ure drawn o~ by the pneum~tlc tu~eB 64 and a~ter belng cut by knife 67 are p~ssed t~.
2~ the common ~hredder ~n a8 mentlone~ ~bove. The r~ts o travel o~ the ~ilm 2 can seach 2 to S m per ~econd.
Edge Ylltting 1~ generally applie~ and an extremely strai~ht cut ~ achieved which, together wlth the dual trac~ing arrangement of ths lay-on roll train 24 and the 2$ positioning o~ the ~lxst roll~ lay~on roll 25~ over more than 180~ o~ ~he ~ur~ace of whlch the ~llm 2 pas~es, the ~ilm ~trip 1~ ~pplled onto tlle precedlng layer wlthout lnclu~lon o~ air and a wound roll 5 i~ ob~lned in which lat~rDl sunout c~nnot be dt~tingui~hed by tho n~ked ey~
hlghly regular wlnding o~ roll S being thu~ obtained whlah 18 a signl~icant improv~ment wlth roqa~d to 8y8tem~ employed to ~te ln whlch a ~urther procc3~ing step i~ nece~ary to obt~ln ~he ~me result.

...... .

- 2~6g7~

When wound roll S re~che~ it~ m~xlmum r~qulred ~iamete~, ~utom~t1c ch~ngeover o~ uindlng onto ~nother core 6 whlch h~ been pre~lou~ly mounted on urm 10 o~
the turret 1~ ready to t~ke pl~ce, To ach~eve thl~, the lay-on rolls 25 ~d 26 ~re ~ully ~etracted to the posltlon ~own in Figur~ 7, and, ~lt~ the ~llm ; con~tantly main~sined under ten~n, the roll~ 39 and 41 of the ~eed ~nd gulding tr~ln 24a are also retracted ~n order to allo~ tne turxet 9 to rotat~. Immedlately after all the ro~lR are retract~d, the turret 9 Lota~es in order to ~rl~g the ~lnl~hed rol~ 5 ~5~ ~igure ~) ~o a positlon wh~re lt ls ready to ~e unloadod nnd un empty c~re 6 to posltlon where it is ready for wlnding. As illu~tr~ted in Flgure 7~ the empty core 6 beur~ agains~
l$ the ~ilm 2 whi~h 1~ stre~ched between the flnished roll 5 and the second l~y-on roll 26 which 1~ in lts ; r~tracte~ po~lt~on. ~he fis~t lay-on roll 25 1~ no longer in contact with the strlp of f~l~ 2.
The l~y-on rolls 25 and 26 ure then ad~anc~d to the 2~ po~ltlon ~hown in Figure 8 ln order to ~ppl~ th~ film 2 flrmly again8t the core ~ ~nd nn en~eloper roll 16a aarrie~ by ~rm~ 16~ ~he side end of which c~n be seen at the free end 81 o~ arm~ 16, is advanced by the arcuate : ~haped arm~ 16 to the pesltlOn lllustr~ted in Fl~ure 8 by ro~tlon of a aam-shap~d drlve member 80 and suitable ~uiding of its movement by moun~ whlch are not ; lllustrated. The ~ilm 2 is now applied to the empty core 6 over ~bout 300~ of i~ ~ur~ace ~nd adhere~ firmly . to the sur~ce o~ co~e 6. A transverse knife B2 provlded at the end 81 o~ arms 16 m~kes a t ansverse cut throug~ the strip of film 2 and the tr8111ng end qf the i wound roll 5 a~n now be wound, for ex~mplc, manually, ; . onto thls roll 5 whlch wlll be ~emoved whlle wlndlng i8 ~ ~ contlnulng on new core 6. ~he envelop~nq dcvlc~ 16 1~

i 206g75~

~hen retracted ~y rotation o~ drlve member 80 and r~ll : productlon contlnues on the new core 6.
~ t ~hould b~ noted th~t lt 1~ not necessary to w~thdr~w tho ~nl~es 50 w~en ch~nglng productlon ~rom ~ne roll ~o another as the ~llm 2 1~ err~ctlvely kept under ten~lon durlng t~ whole roll changeovar operatlon. The duration of thl~ r~ll ch~ngeover oper~tion 1~ e~tremely brle~ th~nks to the use o~ a ~o~t~e progr~mm~ble . log~c~l controller wh~ch sequen~e3 the control and movem~nts o~ ~11 the elements o~ the appar~tu~, a num~ar o~ fail3afe devlce~ en~urlng tha~ no operatlon c~n proceed before ~ ~rtlcipntlng components are ln the c~rreot positlon, while the tenalon in the ~llm i8 permanently monitored ~nd regul~ted.
The pre3ent lnventlon ~ obvlougly not l~mlted to the embodiments whlch h~ve ~ust been desarlbed ~nd ~llustr~t~d but m~y be ~ub~ct to numoro~ v~rl~t~ona ~ccessl~le to tho~e ~kllled ln the art wlthout ~hlS
however l~adlng to B departure ~rom the 3cope Of tho ~0 invention. ~hus~ ln~tea~ o~ only using two edge slitters 50 to o~tain wound illm roll~ having a por~octly strDight edge it would be pooslblo to Uso nt loast ~n additionnl c:o~tor sheet trlnl ln ordor to prod~:co ~cwo lillt rollq d~lrin51,wind-n~.

Claims

1. An apparatus for winding a continuous web of film material onto a core driven in rotation by a spindle and onto which said web of film is wound in order to form a cylindrical wound roll by means of a train of lay-on rolls for applying said web to a said core, said train comprising first and second idling rolls, arranged parallel to said core the first of said rolls being arranged parallel to said core the first of said rolls being partially surrounded, during winding of said core, by said web and being disposed tangentially with respect to said second roll while firmly pressing said respect to said second roll while firmly pressing said web against the surface thereof, and with respect to the outer surface of the wound roll to which said film is applied wherein, in the winding position, said first and second rolls are respectively applied to the outer surface of said wound roll being formed on said core and to said first roll by separate urging means located at each end of each roll and each acting on a respective pivoting arm one end of which carries a bearing allowing rotation of a roll mounted therein and the other end of which pivots on a carriage movable along a guiding surface, said guiding surfaces of each of said rolls being mutually parallel and the movements of the two carriages of a roll being synchronized by mechanical synchronization means linking said two carriages.

2. An apparatus for winding a web of film according to claim 1 wherein each of said urging means is adapted to act on the corresponding pivoting arm in order to resiliently bias it to a position of maximum angle of swing when said first or second rolls are not subject to the respective reaction forces respectively provided by said wound roll and by said first lay-on roll.

3. An apparatus for winding a web of film according to claim 1 wherein said urging means consist of a pneumatic cylinder having a piston movable therein, the rod of said piston pivoting on an extension of said pivoting arm while the end of said pneumatic cylinder remote from said rod pivots on the corresponding carriage.

4. An apparatus for winding a web of film according to claim 1, wherein in the position corresponding to thread-up or initiation of winding, the carriages of said first cylinder are adapted to be displaced away from said cylindrical roll to a retracted position at which said first lay-on roll is no longer in contact with said second lay-on roll and with the outer surface of said cylindrical roll whereby a passage between said first and second lay-on rolls is created for allowing introduction of the leader of the film to be wound.

5. An apparatus for winding a web of film according to claim 4 wherein the carriages of the second said lay-on roll are adapted to be held in position while their pivoting arms are caused to pivot to a position of maximum allowable swing by said urging means.

6. An apparatus for winding a web of film according to claim 1 wherein where said apparatus includes several cores each arranged on one of the arms of a rotatable turret means, the carriages of said first and said second lay-on rolls are adapted to move along their guiding surfaces to a retracted position remote from said wound roll to allow the arms, carrying a said wound roll or core, of said turret to rotate.

7. An apparatus for winding a web of film according to claim 1 wherein said apparatus includes, applied to said continuous web of film ahead, considered in the direction of advancement of said web, of said first and second lay-on rolls, a train of web feeding and slitting rolls.

8. An apparatus for winding a web of film according to claim 7, wherein said train of web feeding and slitting rolls comprises a third roll providing transfer to said second lay-on roll, a fourth roll for tensioning said continuous web of film during cutting and a fifth roll for stabilizing and maintaining the web of film during cutting thereof, said third, fourth and fifth rolls being parallely placed, in the production position of said apparatus, in a position where they are substantially vertically aligned one above the other and mutually spaced, said web of film being wound, prior to engaging said second lay-on roll, partially over said web-feeding rolls in alternate directions from one roll to the next.

9. An apparatus for winding a web of film according to claim 8, wherein at least one knife means is applied to said web of film stretched between said fourth and fifth rolls..

10. An apparatus for winding a web of film according to claim 8 wherein the end bearings of the third, fourth and fifth rolls are each carried by a carriage movable along a substantially horizontal guiding surface arranged laterally with respect to said wound roll of film, the two carriages for each roll being synchronized by mechanical synchronizing means and being adapted to be movable, at least as regards said third and fifth rolls, from a position where they are advanced towards said wound roll of film to a retracted position.

11. An apparatus for winding a web of film according to claim 10, wherein in the position corresponding to thread-up or initiation of winding, the carriages of said third and fifth rolls are movable along their guiding surfaces in order to approach said wound roll to a fully-advanced position that provides a passage between said advance third and fifth rolls, and said fourth roll, allowing introduction of the leader of the film to be wound.

12. An apparatus for winding a web of film according to claim 10, wherein the five said rolls comprising the two said lay-on rolls and the three said web-feeding rolls have substantially the same length and wherein the guiding surfaces for the carriages of said five rolls are supported by two parallel vertical plates arranged at a spacing substantially corresponding to the length of said rolls.

13. An apparatus for winding a web of film according to claim 12, wherein said two parallel vertical plates carry a beam arranged parallel to said rolls and at the same level as said fourth roll and at the opposite side thereto to said wound roll of film, said hollow beam carrying at the upper portion thereof a knife means mounted on a movable carrier the position of which can be adjusted both in the direction parallel to the axis of said beam and in the direction perpendicular thereto and wherein said knife means is applied to said film stretched between said fourth and fifth rolls in the region of said fifth roll.

14. An apparatus for winding a web of film according to claim 13, wherein said beam carries at least one tube for collecting the strip of trim cut from said continuous web of film by said knife means.

15. An apparatus for winding a web of film according to claim 14 wherein said trim collecting tube is carried substantially horizontally below said beam, said tube having an inlet for said trim in the form of a mouthpiece that opens below said fourth roll.

16. An apparatus for winding a web of film according to claim 14, wherein said tube includes means for cutting said trim after introduction thereof into said tube.

17. An apparatus for winding a web of film according to claim 1, wherein the extreme positions of the carriages of said first and second rolls on their respective guiding surfaces are adjustable manually by moving the position of stop means cooperating with means for generating an electrical signal to control a drive motor for providing synchronized displacement of the two carriages of each said roll.

18. An apparatus for winding a web of film according to claim 10, wherein the extreme positions of the carriages of said third, fourth and fifth rolls on their respective guiding surfaces are manually adjustable by moving the position on the corresponding plate of a stop means cooperating with an electrical of electronic switch means for controlling a drive motor motor for providing synchronized displacement of the two carriages of each said roll.

19. An apparatus for winding a web of film according to claim 17, wherein mechanical synchronization means for the two carriages of each of said first and second rolls include mechanical synchronization interrupting means adapted to enable the position of one of said two carriages connected to said synchronizing means to be adjusted independently of the other which, for its part, remains synchronized.

20. An apparatus for winding a web of film according to claim 18, wherein mechanical synchronizing means for the two carriages of each of said third, fourth and fifth rolls include mechanical synchronization interrupting means adapted to enable the position one of said two carriages connected to said synchronizing means to be adjusted independently of the other.

21. An apparatus for winding a web of film according to claim 1, wherein said first roll is covered with an elastomeric material.

22. An apparatus for winding a web of film according to claim 1, wherein said second roll is a highly-rigid solid roll having a chrome plated finish.

23. An apparatus for winding a web of film according to claim 8, wherein said third, fourth and fifth rolls are in aluminum with a black anodized finish.

24. An method for winding a continuous web of film material onto a core driven in rotation by a spindle and onto which said web is wound in order to constitute a cylindrical wound roll by means of a train of lay-on film application rolls consisting of first and second rolls pressing said web of film partially wound around said first roll respectively against the outer surface of said wound roll and against said first roll, wherein each one of the end bearings of the first and second rolls are mounted on a pivoting arm carried by a carriage movable on a guiding surface and the movements of the two carriages of each roll being synchronized, wherein each of said arms is acted on by individual urging means to cause pivoting thereof whereby said second roll is urged against said first roll, and wherein in order to introduce said web onto said core prior to said winding operation, the two carriages of said first roll are retracted on their guiding surfaces away from said core in order to establish a passage between said first and second rolls through which the end of said web of film to be wound is introduced and wherein before the start of winding, the said carriages are returned to their starting positions in order to press said web of film against said wound roll and onto said first roll.

25. A method for winding a web of film according to claim 24, wherein with several cores being each arranged on one arm of a revolving turret, prior to rotation of said turret, the carriages of said first and second rolls are retracted in their guiding surfaces in order to move them away from said roll of film to provide a free passage for an arm loaded with a core or a wound roll of film of said turret.

26. A method for winding a web of film according to claim 24, in which onto said web of film, a train of web feed and guiding rolls over which said web passes in alternate directions is provided ahead of said lay-on film application rolls wherein each one of the end bearings of at least one of two alternate ones of said web feed and guiding rolls is mounted on a movable carriage moving linearly on a guiding surface in mechanical synchronization with the other of the two carriages of each of said rolls, said alternate individual rolls being displaced through moving of the carriages thereof on said guiding surfaces in order to bring them close to said wound roll of film and to open up a passage between said alternate rolls through which the leader end of a web to be wound in introduced and wherein, after the start of winding, said carriages are returned to their starting position in order to bring said web of film in to contact with said feed and guiding rolls.