Note: Descriptions are shown in the official language in which they were submitted.
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METHOD FOR MAKING SUPPLY ROLLS FROM ~AG OR SACK CHAINS AS WELL
AS SUPPLY ROLhS MADE ACCORDING TO SAID METHOD
BACKGROUND OF THE INVENTION
Field of the Invention
This invention relates to a method for making supply
rolls from sacks or bags joined together in web-like bag or sack
chains, with thickenings lying at at least one edge reyion of
the bag or sack chains and preferably formed by side folds, hand-
les and handle strengthsnings, and also to supply rolls made ac-
cording to this method.
escription of the Prior Art
When supply rolls toring the sacks and bags are formed
out of sack or bag chains, at the sides thereof beads are obtain-
ed, if the sack or bag chains have thickenings at their edges,
said beads not only impeding the formation of the supply rolls
and impairlng latters' stability, but also providing them with
an untidy appearance.
5ummary of the Invention
It is an ob~ect of the invent1on to provide a method of
the kind mentioned here~nbefore, according to which fine and sta- -
blQ supply rolls hav$ng a cylindrical form can be made from sack
or bag chains having thickenings at their edges.
This problem i8 solved according to the invention by a
method of the generic type by the fact that the bag chain is
wound on a winding core or winding tub~ which only extend along
the not thickened ectlon of the sack or bag chain or of the
supply roll being formed. According to the method of the lnvent- -
lon, during winding the bead or the beads at the edges are press- ~-
ed into the space located between the front sides of the winding
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cores or winding tubes and the rolls wound thereonto. Since thus
the beads at the edges are pressed through towards the inside,
cylindrical supply rolls can be formed in spite of thickenings
at the edges. For this purpose, the diameter of the winding co-
res and of the supply rolls is to be dimensioned suoh that the
spaces formed between their front sides are capable of receiving
the thickenings pressed to the inside without beads being formed
at the edge sections of the supply roll after filling these spa-
ces.
For a method for making supply rolls from sack or bag sca-
les consisting of a web-like sequence of sacks or bags arranged
in overlapping or scale formation, with thickening~ lying at at
least one edge section of the sack or bag scale and preferably
formed by side foldc or handle.~ or handle hole strengthenings,
in which the sack or bag scale is wound onto a winding tube or :
winding core together with two holding straps, the probl~m is :
solved in accordance with the invention in that the sack or bag
scale is wound onto a winding core or winding tube extending on-
ly along the not thickened section of the sack or bag scale or
the supply roll being formed.
A supply roll made according to the method of the i~vent-
ion is distinguished according to the invention in that the
thickened edge portion or the thickened edge portlons are press-
ed into the space between the front side(s) of the winding core
or the winding tube and the roll in such a way tha~ the supply
roll as a whole has a substantially cylindrical form.
Advantageously a rod is provided extending through the
winding core or the wind ing tube along the center line, said rod
carrying plates at the end bordering the supply roll. Said pla-
tes are used for the support of the front sides of the roll so
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that a film reel-like slipping of the windings is prevented.
The rod can be mounted in bores of lids put on the front
side of the winding tubes. `~
srief Description of the Drawing
Figure la shows a part of a bag chain consisting of bags
~oi~ed together along perforated separation lines and having
side folds at the bottom.
Figure lb shows a part of a bag chain the bags thereof
having lateral side folds.
Figure lc shows a part of a bag chain with side folds at
the bottom and handle hole strengthenings at the top.
Figure ld shows a bag chain with side folds at the bottom
and handles at the top~
Figure 2 is a sectional view of a bag with a side fold at
the bottom. .
Figure 3 is a longitudinal section of a supply roll
formed by winding of a bag chain accordin~ to Figures la and 2
onto a winding tube the width of which corresponds to the bag -~
chain.
Flgure 4 i~ a longitudinal section of a supply roll accor- :.
dlng to the invention which is form~d by winding of a bag chain
according to Figures la or 2 onto a correspondingly shortened
winding tube. ::
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Figure 5 is a longitudinal section of a supply roll being
formed, in which a bag web according to Figure lb is wound onto
a correspondingly shortened winding tube.
Figure 6 is a schematical side view of an arrangement for
the making of bag chains and supply rolls from these bag chains.
Flgure 7 is a longitudinal section of a supply roll being
formed, onto which sacks with side folds and arranged in over-
lapping or scale formation are wound together with holding
straps.
Figure ~ is a sec~ional view of an arrangement for the
making of sacks with side folds and arranged in overlapping or
scale formatlon and for the winding of said side-fold sacks to
form supply rolls.
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Detailled Description of Preferred Embodiments
An illustrated embodiment of the invention will now be
described more in detail with reference to the drawings.
Figures la to ld show parts of bag chains to be wound to
supply rolls. In the embodiment according to Figure la, the indi-
vidual bags are provided with folds put into at the bottom and
lateral weld seams, wherein the individual bags ar2 ~oined toge-
ther via perforated lines arranged between the transversely ex-
tending lateral weld seams of the bags.
In the embodiment according to Figure lb, the bag chain
consists of a tube web having side folds, said web being provid-
ed with transversely extending bottom weld seams in the distance
of the individual bags and ad~acent transverse per$orated lines.
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The bag chain according to Figure lc corresponds to the one ac-
cording to Fi~ure la, apart from the fact that at the mouth
edges of the bags handle hole stren~henings are provided.
In the bag chain according to Figure ld U-shaped handles
welded thereon are provided in~tead of the handle hole strengthe-
nings.
If bag chains according to Flgures la and 2, which con-
sist of Jolned-together bags 1 with bottom folds, are wound onto
a winding tube 2 to form a winding 3, this results in a supply
roll of the kind known from Figure 3 with a ring bead 4 at the
end.
In order to avoid said ring bead, as can be seen from Fi-
gure 4, a winding tube 5 shortened ln its length is used so-that
the ring bead can be pressed into the region between the one
front side of the winding tube 5 and the supply roll 3 and also
the section 6 at the bottom of the supply roll has no thicken-
ing. Thus, the cylindrical supply roll as shown in Figure 4 can
be produced.
In order to produce supply rolls of the kind as shown in
Figure 4, an arrangement schematically shown in Figure 6 can be
used. Said arrangement consist of a draw-off device for a web 7
of tubular foil. The drawn-of web 7 of tubular foil is then pro-
vided with a side fold by a tool 8. The thus formed side fold
tube then passes through a working station 9 in which for in-
stance suspension hole~, weld and perforating seams are formed.
Subsequent ther~to the sack chain 10 formed by the tool 8 i~
wound onto a wlnding 3. Said arrangem~nt is of a basically known
kind so that it need not to be discussed ln detail.
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Figure 5 shows a sac~ chain 11 consisting of Joined-to-
gether side-fold bags as known from Figure lb. Said sack chain
11 is wound to a roll 12, the winding tube 13 only being of such
a length that the side fold sections 14 and 14' pro~rude lateral-
ly so that said sections can make way in direction to the in-
side. In order to obtain a perfect transport and above all a
bearing of such a winding 12', front-side plates 15, 16 are pro-
vided which form solid stack surfaces. Said plates 15, 16 are
connected to each other via an axis 17 carried through washer
plates 18, 19 in the tube 13. For the formation of such kind of
a winding 12' also the arrangement as represented in Figure 6
can be used.
As an alternative to Flgure 5 showing a wound sack chain,
also bags or sacks arranged in overlapping or slace formation
can be wound to a winding 20. In this case holding straps 21, 22
are introduced during winding. The kind o production of such
windings can be seen in Fi~ure 8 which ls not descr~bed in de-
tall herein, slnce the schematically represented arrangement and
the method carried out by means thereof has already been known
from published patent publications.
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