Note: Descriptions are shown in the official language in which they were submitted.
~PR-14-1995 15:17 SCHREIBER TRRNSLRTIONS 301 816 2398 P.09/24
21~7242
n~s~lip~ion
Spheres made of stretch metal, w~ , in turn, is made of thin ~ foil, etc., are
poured inro fuel tanks, etc., for e~mplP, as explosion protection. The m~nllfartllre of ~e
spheres, by cutting ~e ~hlmin~llm strip in the lo~itut1in~l drrection, lateral s(l-.t-,hil~g, rougll
co~ t;s~ion of strips made of stretch ~etal in the lateral direction, cut~ng up into individual
sections, and co~lplessi~ of sect;onc into spheres, is basically known, for example, from
~rrn~n patent applir~tion~ P 38 14 448 and P 38 16 792.
In order, on the one hand, to ensure the smoothest possible mnni~lg, and, on the other hand
sl~st~inPA op~at~ of such a n~rhine, spe~ fi~ ly, at igh speeds of up to 3 m/sec in
matenal th t is as ~lffl~ t to handle as 70 ~ n~ foil~ there are certain detail
problems that have to be solved, if Ihe spheres are to have a n-ogljgihly low waste ~rejection].
Rejection develops when ~e m~t~n~l ~iC T~ on within the spheres is too irregular, and
hen, ~c a result, ~e exrlocion protectinn would no longer be gv~r~ntt-e~l
The problem lies, on the one h~n~7 in the fact that the al~ - foil used, as a rule, with a
thic~nPss of less than 1llO mm, at the desired speeds, is already difficult to ha~dle; besides,
after cutting and cross-s~et~ g, h~n~11in~ comes ev~en more labile be~ r7e ~e finichP~
stretch m~terial, dur~ it~7 lateral ~ r~ , undergoei~7 a leng~ reduction by about 10%7
and bcr~lse precirely ~his length redvcti~ n can again be reversed by tr~Ctinn ~711ei7i'7~i~g in ~e
longitu~in~l direction
Butthat,however,would,ontheonehand, ;~ Cr---i~ alter~hefabric ~ u~ , and,on
~he odher hand, any lP~y~hPnin~ of ~he m~t~ri~l afi~r cross~ l.;.~ afFec~ the system used
lL1ce a Tn~teri~l strelch ill the lo~tl]Ain~l direction.
e, in adAitinn~ the lateral stretch leads to a p~lly dastic mq~ri~l d~ro ~ ;on~ the
cross-stretched m~terial, upon exerdon of longi~l forces, behaves not only like a
~het~h~ble mate~ial, but also like a material t~at is elasdc in 1he l~r~ihlAinql ~ iol~.
l~hat makes the ~inm~nt of high ruming 5pOedS and ~he ~ a~1 exact speed con~rol of
the individual drives -- in o~her wor~, the cutting and ~Jlessi~ rollers of the 6~ctching unit,
~PR-14-1995 15:18 SCHREIBER TRRNSLRTIONS 301 816 2398 P.10/24
2147242
of the e l~ani~ units, and of the w~~ g tPrmin~t roller in~o a big problem bec~llse already
the minor degree of e~ee~in~ the permissible traction stress can lead either to a reshapin~ of
the m~t~ri~l or to a breaka~e of the strip. By tbe same token, reeling up on the te~ninal
roller must not be pe.ro"l~ed with e~ssiv~ly stto~ traction, bcc~,., o~erwise, the
superposed layers of the stretch material would again press each other llat.
-
On top of this, there is the fact thal, in case of contim-oll~ processing of a strip, the
requi~ e ~ts for Tpm regulation regarding the speed of reg~ on and ils a~ y, areb~c c~lly greatet ill ~e last drive, if ~t ~e beginnin~ of ~e device, one works with a
con~t~nt initial speed, because a11 rl~ . s in ~e ~oceC~ g speed, occu~ as the device
even in short range terms -- are added up to the end, and be~ e, in the process,both a buildup and a simplc b~ nv can lead t~ a very irregular speed profile ~hat ~vould
change q!licl~y.
Addidonally, the material must, for the individual ~.oces;ing stat~ons, be subjected to a
certain .~lin;~ tension in the lol~itu(lin-l direction in order to prevent a foldin~ -- looking
at it from lhe side--or a pileup in ~ront of one station, som~thin~ that in~rnP~i-tely leads to
the destruction of ~e ql~J,~ l strip.
This is why it is bqsi~11y hlown thal one m~st use tension rollers when hqntlli~ lU~lni~g
strips
The e~ problems are solved in a device of this ki~d by ~e char~qcle~ r~Lu~s of
Claim 1. Advantageous v_,~iu~ls result ~rom lhe s~ sim~.
To f~çilir te the most accur ~ pos~;~'o rpm re.g~ ti-n of ~he motor for ~he h~ el, one
does not use a di~ cu~rent motor, which, to be sure, is more r~-son-hly priced but which
in certain ~pm ranges reveals an u~vul~ble tor~ue development, so ~at, dur~,
~c.ele.~tion,f~rst of all, ~ere is a long c~t~ up, and, upon le~ ;np. t~e rpm ~reshold,
there is an e~F.siYely strong t~-tinn, while the strip if7torr off. I~e direct c~rent motor
u~.ed Is ~c~.et w~ a~ r e~ -u~ 1~. ~ opto-elec~rical sensor, tihat
is ~ at an il~ ."...~ rnt~ble w~ich is conn~cled to the motor shaf~
~PR-14-1995 15:18 21~ 7 2 ~ 2
This actual rpm is increased or reduced, depending on ~le state of t~le last prior tension roller
which is located after the stretch unit, and which, as a rule, is located also after the clear~ing
device that is connesl~ after said stretch unit. Here, one uses, as a ten~ion roller, a non-
driven defl~cti- n roller, which, by virtue of its own ~eight lies in a loop of tbe strip tha~ is
open toward the top, wl~,re~ this tension roller can be moved in ess~ntiqlly perpe~ ir~ rly
runnin~ guides.
If the ~..";.,ql reel runs too fast cu~par~d to the last work unit before the tension roller,
then the tension roller will migrate upward iIl its guides up to a preA~tPrminPA final stop.
The height location of ~he tension roller ~t~æ~ ~e upper and lower l~.. ulillal spots,
however, is conxL~ ly mo~ ol~d by a lighl barrier ~at is aimed from above at the tension
roller or a r~flect~-r tbat is finnly connec~d wi~ it and w~ch thus can at any t~me measure
the momentary heighl location of this tension roller. The motor of dle tc~ al reel is so
accelerated or slowed down by a control electl~nlcs unit that ~e tension roller will be kept in
a middle range and preferably at rest.
So that the n~c~ss~ry rpm range ~ it must be possible to speed up rhs~ ccly from zero as
the m ,~lin~ is started up--may be made more easily m control e~i..f~ g cerms, the motor
of ~e ~nnin~l roll is~ sd~itinnslly e~lipped wi~ a s~enes dash ~o~ t~ gear, ~ith, for
e~rnrle, four s~lcce~ e rpm steps When ~e tension rollel runs llu~u~ a c~nt~^T1~ss
~lpper ~e",.;..~l stop, ~e gear blms t~e motor imo the nex~ slower gear step, and upon
re~ehin~ ~e lower t~nnin~l stop, ~he next faster gear step.
l'dtlitions11y, shor~-term speed ch~ s that build up very easily are ba1~nr~ out between ~he
sh~ ng unit and ~he just describet tension roller in ~hat ~e stretch mate~ial in between
nrns via two cl~nir~ brushes in an s-shaped ~ ese brushes have such long and
elastic bns~des ~at the e1sQ~irity of ~e bris'des can c~ue~i~_iy make up for ~e short term
cl ces i~ ~e traction stress of the stretch material.
In ord~r to not filr~er cn ~ "k~, the follow-up rcgulation of the t,~ reel speed, the
strooch unit is dri~rcn wlth co~tant rpm, aDd, i~tead, the speod of thc prior cut~ ~it is
reg~ t~A This is done, again, by meaI~s of a first tension roller, ~la~gcd ~t~vc~,~ the
cutting unit and the ~h~t~hhlg UIlit, said first tension roller wo-k;~ in a n-anner similar to
RPR-14-1995 15:18 SCHREIBER TRRNSL~TIONS 21 4 7 2 4 2 301 816 2398 P.12/24
~ abo~e~escribed second tension roller, althr~ the Ipm of tlle cutting uni~ or the prior
storage roller should vary only within a small spread. This is why either the breal~g force
of the ~"..i.,~l reel or the speed of the cut~i~g unit or bolh togelher ~re changed ei~her only
upon re~rhing the upper or lower sensors or by the light barrier in accordance wi~ the
height location of the tension roller.
T}le breaking force, applied to the storage reel at the beginning of the system, here
e~cPnri~lly varies not accordi~ to the ~ -ded mn."f.~ speed of the cutting unit but
r~ther according to the mass [weight] still present on the storage ~supply] reel and the thus
.l~e,,..i.~ inertia agaiust speed ch~ges.
Additionally, at t~he int~n~ fast ~loc~ speeds, t~e m~mlf~en~e of the spheres from the
stretch m~t~ri~l cannot be acccmplich~-A, as in the hitherto knowll solutions, by means of a
star-shaped gradu~l1y rotating shape star, inserted into the se~ e~l~ of the stretch m~tPri~l on
one side and then co,-~plessed into spheres tha~ again fall out of t~e star on t~e ot~er side,
bec~ cl`7 concid~rin~ the intl-n-l~d ~ S71)eed~ the centrifugal force would inflllpn~e ~e
entire p~oces~ l~cg~ively and iu a A;ffi~ to a.~ici~.atc f~chion
As is Icnown, tl}e s~etch material s~ip is iirst of all ~ushed ~o~e~er roughly sideways, in
~bat it is pulled ll~OUgll a c~lih~ti~n opPn;l~ 34, as a reSlllt of which 131e strip is piled up in
wave-form in the Ion~ Ain~ direction. l~his pushed-togclL~ strip is ~en wt up into ce~tain
lengths and ~e seg~ 7 t7nus obtained are shaped to make up spheres by means of negative
~h~
Here it was also k~own that, in the case of such a sphere unit--which consists of several
wo,ki~g units, next to each other--~he aIfflng can be done by means of two knive~ that rest
agaiTlst each other and that can be ~ laterally wi~ rcspect to each o~er and that reveal
Psse~ 1y round, for e~mp'e, pe~aped, flush ope~.;.~. The relative offset wi~ respect
t~ each other reAllr~ ~e flush aIrA~e~nPnr of d~e pear-shaped Opf ~ gs, and, when t}ae
A- .~.n~"..nPnt of the pear shapes is rotated by 180 with respect to each o~e~, one gets --
upon a shift ~o o~o dL~;~io~--a finslly 6mall~, circul~ free space, whereas, in ~he case
of a shift ~nto t_e o~er di~on, one gets a big, perFen~ r, lens-shaped and ever
l~lllU~ fr~ space, :that leads to ~hcd~ g off when the thir~les5 of the lens mo~es toward
RPR-14-1995 15: 18 SCHREIBER TRRNSL~TIONS 21 4 7 2 ~ 2301 816 2398 P.13/24
zero.
In the invention ~t hand, for example, the clamping of the strips, pushed togerher through the
calibration opening, is accomplished in a liffer~nt place and with s~a~ devices when
co~a,ed to the cutting operalion.
The e~s~-nti~l point concistC in the fact that tbe f~l~d~`d, free end of the not yet deflected foil
strip is in~erted into the ~;ylil~l ;r~l stamp guide in a sta~np block that is open on both front
faces. Upon in ertion, but at the latest, upon shaping to fonn the splleres, the rear openi.4
of the stamp ~ide is closed off by a t~nn;n~l ~tamp 23 with a semi~rcular concave front.
The cutt~ng of ~e forward seg~ into seC1;nnc takes place at t~e beginninE and preferably
sull within ~he stamp g~ide by means of knives that can be moved against each other and ~at
are preferably guided directly in ~e stamp block. After the free end of ~he endless foil strip
has been run back, a front stamp 22 is also inserted into the stamp guide from the front and,
in that way, the sphere is shaped bet~. ~ ~e front stamp and the end starnp, wi~in the
stamp guide. In case of several work stations alla~,Ld next to each other, for example, the
front stamps are ~ n,~eA in a row, ne~t to each o~er, specifically, on one of two h~Lives 27
that can be moved wi~ re~pect to each o~her, on which all front s~nps are applied. In the
positi~n~ between the front stamps, cutting opens are left open in the knives and ~e cross-
seclion~ of these cutting opeI~ings can be ~ -r~ b~ p ~e knives against each other in
order ~lrmly to clamp the foil s~ip and ~s to be able to ~la.ls~ it also, step by step, ir~
the lon~t~ n~l direction, for eY~n~rle, into ~he stamp gllide.
To be abIe to do ~is with the l~c~c -.y p~ce~ .g speed, one can shift ~e stamp block in
the lateral di~ection wi~ re~ect to the kllives for cl~ g and fur~er ll~},o~
stre~ch .~ 1 an~l ~us also wi~ ~spect tO ~e fronr stamps ~hat are mmlnte~l on ~is knife.
I~ IhaI way, the staTnp guides of tl~e stamp blo~k ca~ be ~ush in one work 6tep with ~e
s~nps, and in another work st~p with the op~ in ~e cl~mrin~ device via whicll ~estretch 1~ S suE~plied to ~e stamp ~ides. Preferably, tlle stamp block is moved he~e
while ~he knife with t~e ~ont sta~nps l~aih~ at rest. Fron~ su~np and l~ li~l stamp
n~ y can be moved in ~be axial direction iDbo t~c 8tamp guide and back out aga~n.
~PR-14-1995 15:19 SCHREIBER TRRNSLRTIONS 21 4 7 2 4 2 301 816 2398 P.14/24
To get the shaped spheres out of the starnp block the le.~ni~ stamp is removed and t~e front
staTnp is imractPfl wi~h COlllplt:Ssed air, as a result of wh~ch ~e sphere is blown OUI
For cla~ping in the plane in front of the front stamps and the actual cutting off wi~in the
st~np block one basically uses ~e same knives ~at in each case are arranged in pairs and
that can be moved toward each other and that, in the plane of the front stamps, are used only
for clamping and for furth~r axial l~ olL, within the stamp block, however, for acn~l
cutting off.
A pracdcal version of ~his invention is ill~-5~ y way of e~mrlP in g~eater detail below.
Figure 1 is a side view of the slretch m--fP.r1~ unit and E;igure 2 is a d~ ti~p Ihe
sphere shaping unit.
Figure 1 is a side Yiew illustrating the .,.~ of the ess~ntislly endless stretch material
that is reeled up on tennin~l reel 7 ~d that is ~hen procesce~l with the device in Figure 2,
away from the reel, to yield ~Fh~Ir5
To the left, in the ~ trqtioln the Iaw material is present in the fonn of a roll, reeled up on
a lsupplyl r~el 2, and as t~e foil slrip 1 ~uns, firsl of all, !1~ a IU1JI;~ unit, then
cutting unit 6, sl~et~ g unit 5, and ~ tionir~ UDit 42, it is p~oces~d into a stretch ~.ial
~at is widened in the lateral di~ection ant that is sho~ d in the lonPil,,~ 1 directioIl and
that has a thir1rn~ that is 100 times greater ~an that of the initial m~t,~riql
By means of ~e ~arious proc~cci~ steps, foil strip 1 is subjected to di~r~ in~l
speeds. For ~is ~ ose, the first t~n~ ni~ reel 8 is ~ g~ beL~ ~,. cut~ing unit 6 and
S~ i~ wut 5 and a 6ecoD~ r;~y~ ~1 9 iS ~I~dllL,'~l bt:Lw~ shet~ g unit S and
l.. il~l reel 7.
To mal~e sure that the speed ch~es that keep adding up will not b~o..~e too fast, and in
ordor w~ ihu~ m~ ~e ~ \t~ ~ ;nn of ~e drive rpm on the dil~e.~ t units even morerliffirlllt~ stretch wlit ~ -- after the ~ has been star~d up -- is run at co~t speed.
Here, two toothed belts 43, wi~ ~eir toothed sides, mn agai~st each o~er in ~he known
~PR-14-1995 15:19 SCHREIBER TRRNSLRTIONS ~ ~ 4 7 2 4 2 301 816 2398 P.15/24
manner, and in each case, hold one outside edge of the foil s~ip 1 ~mly belw~n each
other. Al the same time, the foil strip nuls up on a ramp piece or a ramp strip 45 so that the
lateral lim~ions of the foil strip will become larger i~ spite of the parallel arrangement of
~e edges of Ihe foil stnp in ~he course of 1he ramp piece 45.
- Tmm~ tely i~ front of stretch unit 5, two defl~ion rollers 38, 39 forrn a downward-
dilcc~d and upward-open loop of 1he foil s'¢ip, one at whose lowest point ~he defl~ctinn
roller 8 rests on foil strip 1. The i~ll.,.~, ~1 weight o~ this tension roller 8 ~le~ es the
te~lsion of foil strip 1 b~,lwæn cutting unit 6 and stretching unit 5. Ihe speed of cut~g unit
6 -- which essenti~lly conciC~ of CUt~Dg roller 3 and ple.S5~g roller 4 that r~ against each
other--is only ~eoretically equal to the l~g speed through stretching unit S besallce
mr....P..~ y speed dif~e,~"ces may ~rise due to the i~lhe~l~ el~cti~ily and spring effect of foil
strip 1. 'lhat can be done either by regulating ~be drive speed of cutting unit 6 and/or
n~lhenin~ or wP~ke~ the running brake on the supply reel 2, som~thing which is also
done by means of aTI ~djllct~l-le elect~ic motor.
Cufflng unit 6 or the braking effect on supply reel 2 is reg~lated as a function of ~e height
IOCA~;OrI of the first tension roller 8. When tension roller 8 reaches or ruIls through ~he
upper or lower sensor 11' or 12', the spc~d of the pr~eA;.~ units is in~ased or reduced
step by step, for ~ nl~lc, m 1% steps, until tension roller 8 is again in the area belv~.en
ullsors 11' and 12'. Sensors 11' and 12' a~ R~1~ elp~!r;r~lly~ via a control, wi~ dle
drive control of the prece~i~g units.
TeTTnin~l reel 7 must be con~ideJEd as being the most ~ffi~ poult in the system behind
stre~h ~ut ~. ~he rpm of motor 10 of ~ 1 reel 7 ~lPper~7s not orlly on the wor~ing
s~ of the prior units and the speed G~ ~s that ~re being add_d up on the basis of
lU~ stretch, etc., but also on the U~ t,..,~ 'tl r of t~..,..;"~l recl 7. This
~la~ , hu~.e~c., has a somewhat circular contour only al the beg~-ni-~, whereas, with
gfO..~ ~ .,. t~-- and irregular mutual ~ DSillg of the individu~l layers of ~e stretch
m~tPri~ ~ outside cGllt-~U- beco~ -s less and less round, a~ld ~bus, eYen in the course of a
single revolution of the t~ nql red, at ~ nti~l ~gular velocity, one e~eo~ differing
speeds of the foil strip.
RPR-14-1995 15: 19 SCHREIBER TRRNSLRTION~ 1 ~ 7 2 4 ~ 301 816 2398 P.16/24
To equaliæ bodl the short te~m and ~e longer-tcrm fluctuations of the lu~ g speeds
between stretch unit S and tern~in~al reel 7, foil strip 1 is, after the stretching unit, first of all
guided over at least one, preferable t~o or more, clP~nin~ brushes 16, for e~mrle, in an s-
shaped pattern, and then, via a se~ond tension roller 9, before foil st~ip 1, during dust
sUctinning 42, s uctinn~ off small residual parts, and in front of dçfl~tion rollers 35/36, with
the full tf ~In;~ reel 7, so tllat cutting up into leng~s with the length-cutting knife 41
be.c~mf~c poscihlf~.
Cl~nin~ brushes 16 remove not only solid particles, but as regards bristle stabili~r, in the
longitudinal (radial) direction, ~e bIushes are so sel~cteA in ~erms of material, thif ~rn~, and
length ~hat an rt~ml~tion of the short-term speed c~n~e~ is a~inP~ Sy means of each brush.
With a 70 ~m thic~ rllllnimlTn foil of average qu~lity, one deals here with brushes havi~g a
Ai~ .ter of about 10 cm, with a clear bnstle lengt~ of aboul 3 cm.
ReG~nse ~he speed of foil strip one can change faster ~n this rear a~ea of ~e device tllan in
the fol~d area, a regulation of ~e Ipm of motor 10 of terrnin~l reel 7 is ~elro,l,.ed not
only when one of the upper or lower sensors 11 or 12 is being mn through, but also in the
area in belween. For t~is purpose, ~ere is att~rll~l to tension roller 9 a reflec~or 15 that is
illu~ ~d by a light barrier 14 tha~ is mounted roughly })e~en~ie~ rly abo~re it. Light
barrier 14 thus C~ n~r;..~rly monitnr~ the height situation of tension roller 9 and is c~ tlA
via a con~rol with the rpm adiusting device of rnotor 10. Motor 10 is r'Aition~lly Cl~n~ y
c~rl.-A ,ega~ li~ its actllal rpm, in tha~ There is an opto ele~1l0nic scari~ Of an
e~ 1 t~~nmrt~r disk that rota~es with the motor s~aft. ~he actual rpm is also
cor~l~lly being cnm~ ~ to the rpm regulating device.
In ;l~Aitinn~ motor 10 has a step gear with rpm ranges that adjoill each other and ~at overlap
each other not at all or only very little. If, in spite of this described p~cisiOll reg~ ion,
this secoDd tension roller reaches ~e upper or lower sensor 11 or 12, then, in this case,
motor 10 is ~wi~ d to ~e ~ext faster or next slower gear step, w~thin which the precision
re~ tir~n of ~he rpm is then agai~ fil.""rA by means of light b~r 14.
Figure 2 shows dle srh~-rirql shape unit whose passage di~clio~ is drawn by an arrow
nlnni~ from le~t to right.
~PR-14-1995 15:20 SCHREIBER TRRNSLRTIONS 2 1 4 7 2 4 2
The strip made of ~l.etcl~i~ material is pulled off a s~pply roller, not shovvn, or a
correspo~ling ml~r of working uIIits of several supply reels, made next to each o~er, via
c~libr~tion openin,~ 34 of calibration rail 20, revealing a strongly lvullde~ en~y, and, as a
result, it is ~trongly pushed together in the laleral direction to form a ronghly round cross-
section. This basic material i~ guided through the overlapping oycl~ing of the cutting
opelun~s 28 of the two flrst knives 26 and 27 that can ~e moved with relation eo each other
and that the-ef~lc can alter their clear passage in order fi~er to COIIIPIeJS the basic material
that is ~eing guided through or also to cut it off entirely.
Knives 26 and 27 are not int~n-1~A to achieve a comrlPt~ cutting off action; inctP~, they are
merely supposed to COIJ1~1CSS, as a result of wbich one can also pull the basic material ~n ~he
direction of t~e arrow and back"n other words, in a l~ngi~u~lin~l direction. Actual cutting
off takes place wi~ ~e iderlti~lly shaped knives 26', 27', that are located inside stamp
block 24.
Cutti~g ope~ s 28 are not circular but radler, in one place, reveal a smaller, addilional
bulge, as s~l~cil~lc 29, wl~by s~ic~le 29 of cutting opening~ 28 of both knives 26, 27
are arranged opposite to each o~er.
As a result, in the case of ~e f;rst two h~h~es 26, 27, in case of a ~u~ cul~ as drawn with
~e solid arrow tips, agains~ each ol~er, it is possible to reduce the Clu3S s~ction to ~e two
semicircles 29, as a result of which ~he hanlc ~t is guided ~rough is c~ essod to about
114 of its lia.. PtP~ and is thus ~ .. ~A in one place. By means of the c~.. ,.-.. lon~in-~1jnal
mo~ e~t of both knives 26 and 27 in the ~ c~ . of arrow 46, ~e ~ firmly cl~...peA
~erein, is inserted i~d;o a s~mp guide 25, that is flush with ~ 28 or 29, byapproaching lmives 26~ 27 in relation to stamp block 24.
After inserdon of the free end of the ha~k, con~plere cutoff is ac~ via knives 26', 27',
by virtue of ~he relative lllO~ t toward each other in the (lirPe~ion of ~e arrow tips shown
in ~e broken lille, so that a ~..f~ 341~,~ lying in stamp guide 25 D~n~ on the
opc.~tiug speed, dle ri~ht, rear end of stamp guide 25 can be opened here or it can be closed
off by a tf ~ stamp 23 placcd in front of it. Mer scgment 34 has been cut off, stamp
block 24 is Iun ~n the laberal f~ n of aITQW 47 by lhe in~val ~h. ~n CUKing ope~
~PR-14-1995 15:20 SCHREIBER TR~NSLRTIONS 301 816 2398 P.18/24
21~7242
28 to the f~ont stamps 29.
This means that the stamp guides are now flush with the fron~ s~mps 22 and the t~
stamps 23 and~ sim~l~t-q-npQusly~ with cu~ing opeiings 28 in lmives 26', 27', 50 that a sphere
is formed from segment 34 by nlnnin~ in stamps 22, 23. This sphere is removed from
stamp guide 25 in that tÇl~nin~l st~np 23 -- which, with the other terminql stam~s of the
other working stations is att.ql`h~d to a stamp plate -- is again pulled back in the direction of
arrow 48 from stamp gli(le 2~ and, silm~lt~n~ol~ly, from the lowcst point of tbe frontal,
hPrni~pher~ reccss of front stamp 22, co~ ,e~sed air is supplied via co.n~l.,ssed air
cQnI~pction 3O7 as a result of which Ihe sphere is blown out of the stamp block.
The advantage of moving stamp block 24 in ~he la~eral direc~ion and ~e st~nrl.c~ of knife 27
in the lateral directlon and Ilot the o~er way around -- a sr~n~s~ hal applies exc~pt for the
cla,npillg movement -- resides in the fact that, as a result, t~e feeding of the stretch metal
strip by vir~e of the ever jr1~-ntir~ feeding positions and the immobili~ of calibration rail 20
is made easier.
