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Патент USA US3079976

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March 5, 1963
E. KUGLER
3,079,966
DRAW s'i'a1NG"'BAGs
Filed Dec. 16, 1959
.
2 sheets-sheet 1v
JNVENTOIL
'
By EMA/V051. Ä/UGL EE.
Arme/V575
"
March 5, 1963
E. KUGLER,
3,079,966
DRAW STRING BAGS
Filed Dec. 16, 1959
2 Sheets-Sheet 2
ÍNVENTOR.
EMANUEL Á/UG/.EE
United States Patent 0 ” ice
1
3,979,965
Patented Mar. 5, 1963
23
on the draw strings rather than on the material of the bag.
¿M9366
Since the draw strings may easily be made strong enough
Emanuel Kugler, Valley Stream, NX.
to withstand any amount of strain likely to be imposed in
DRAW S'flälNG BAGS
(124 Richmond Place, Lawrence, NY.)
Filed Dec. 16, 1959, Ser. No. 859,?572
3 ßiaims. (Cl. 15d-1i)
this manner, tearing of the bags during loading is Sub
Ul stantially eliminated.
Any suitable flexible, readily severable material may
be used in making draw string bags in accordance with
the present invention but plastic heat severable materials
This invention relates to draw string bags. More pan
ticularly, the invention relates to draw string bags made of
such as polyethylene are preferred. The thickness of
readily severable material.
10 such material may vary over a Wide range but the usual
Previously, conventional draw string bags have had the
thickness of polyethylene for average use is between about
draw strings of the respective hems of the mouth of the
@.Ctli and about 0.910 inch. Where relatively thin mate
bag fastened together at points outside the bag and such
rial is used or where heavy loads are to be carried it may
points have been spaced apart a distance somewhat greater
be desirable to use multiple thicknesses of material for
than the effective width of the bag. Bags thus formed 15 part or all of the bag.
can be closed yby grasping the draw strings outside either
Any suitable string means may be used in bags con
edge of the bag and pulling material of the hems away
structed in accordance with this invention and it is in
from the point where the draw strings are grasped towards
tended for example that conventional cords or plastic
the other edge of the bag, thus gathering the hems to
strings as well as metal strips or tapes may be used for
thereby close the mouth of the bag. Such bags are7
this purpose.
therefore, very convenient to open and close. When such
bags are opened, however, and especially when they are
opened by mechanical lingers or spreader means prior
to being filled with merchandise, the material of the bag
frequently tears, especially along the longitudinal margins
of the bag. This tearing of the bags during filling is
caused by the mechanical lingers being inserted in the
mouth and spread apart, sometimes quite abruptly and
ln fastening the string means of bags constructed in ac
cordance with this invention, any suitable method of
fastening may be employed. For instance, heat sealing
techniques may be employed with heat fusible tapes or
strings while suitable means such as staples may be used
to fasten other types of string means such as ordinary
cords.
This application is a continuation-in-part of my pre
forcibly, to open the mouth of the bag as far as possible.
vious co-pending application Serial No. 773,029 tiled No
Since in the conventional bag the points at which the draw 30 vember l0, 1958.
strings are fastened together are spaced apart a distance
in making a draw string bag in accordance with the
greater than the effective width of the bag, this opening
present invention tie bag material may tirst be formed
movement results in sudden strain upon the material of
into a bag strip having oppositely disposed front and back
the bag as the mouth reaches its widest open position and
panels connected together along one longitudinal margin
the hems forming the mouth of the bag are stretched
of the strip corresponding to the bottom of the bags and
taut. This sudden strain frequently results in tearing of
in which oppositely disposed edge portions of said panels
the material of the bag and is a source of considerable
form the other longitudinal margin of the strip with each
diihculty in connection with the loading of bags of this
type. it is
object of the present invention to provide
a draw string bag and method of making same which sub
stantially eliminates the difficulties mentioned above while
at the same time retaining the advantages of the type of
of said edge portions comprising a tubular hem containing
string means. The material of the bag strip including
40 material of the hems surrounding the string means may
then be segmented and sealed along transverse seal lines
at a bag width interval to form a bag segment while leav
draw string bag described above.
According to the present invention, a draw string bag
is provided which comprises front and back panels of
iiexible, readily severable material connected together
ing the string means intact. This may be accomplished
in any suitable manner such as by utilizing the method
and apparatus disclosed in the above-mentioned applica
tion Serial No. 773,029. The transverse seal lines thus
along longitudinal side margins of the bag. Preferably
form the longitudinal margins of the bag segment while
the material is heat scalable and heat severable (eg. poly
the hems extend the full width of the bag segment be~
ethylene) to facilitate fabrication. Gpposed transverse
tween such margins. The string means of the respective
edges of these panels are provided with tubular lips which
hems is then fastened together at a first point outside the
form an open mouth of the bag and extend to the respec
bag segment adjacent one longitudinal margin thereof
tive longitudinal margins of the bag. Each of the tubular
and the material of the hems is then advanced towards
lips is coextensive with the full width of the bag and con
said point relative to the string means contained in the
tains a draw string a xd the draw strings of the respective
hems. The string means of the respective hems are then
55
tubular lips are fastened together outside the bag at points
fastened together at a second point outside the bag seg
adjacent the respective longitudinal margins of the bag.
ment adjacent the other longitudinal margin thereof with
The points at which the draw strings are fastened together
the second point being spaced from the ñrst point a dis
are spaced apart a distance less than the width of the bag
tance less than the full width of the bag segment to retain
thereby limiting the extent to which the mouth of the bag
the hems in a puclcered condition. The string means may
can be opened and permanently retaining the tubular lips 60 then be severed to separate the thus formed bag from
in a puckered or gathered condition.
the bag strip.
lt is apparent that when draw string bags constructed in
accordance with the present invention are opened in the
Various further :and more speciñc objects, features
and advantages of this invention will appear from the
manner described above, the extent to which the mouth of
description taken in connection with the accompanying
the bag can be opened is limited not by the width of the 65 l rawings which form a part of this specification and il
bag, as is the case with previously l-:nown bags of the
lustrate by way of example certain preferred embodi
type described above, but rather by the distance between
ments of the invention. The invention consists in such
the respective points at which the draw strings are fastened
novel features as may be shown and `described in con
together, since such distance is less than the width of the 70 nection with the `articles tand methods herein disclosed.
bag. The sudden strain occurring when the mouth of the
In the drawings:
bag reaches its widest open position is, therefore, exerted
FIG. 1 is `a plan view of a web of bag material show
3,079,966
3
ing zrsomewhat schematically certain steps in the forma
tion »of draw string bags such as the bagshown-in ~FIG.
together outside the leading bag segment 30 adjacent
the other longitudinal »side margin «32' thereof las by -a
staple 3'3’ which is spaced along the strings 23 and 23'
from the staple y3,3; by .a ldistance less than the normal
width ‘of the bag segment-@between the margins 32 and
32' thus retaining the hems 27 andf27^of the bag segment
30 in »a permanently puckered condition. The strings
23 and 23’ ‘may then lbe severed between thîe staple 33'
and the next succeeding bag segment 33a, as indicated
6 in »accordance with the invention;
FIG. 2 shows the same web in a later stage of forma
tion;
FIG. .-3 lis a cross-*sectional view taken at 3--3 ‘of
FIG. 2;
Y IFIG. l4 is a plan View showing `a still vlater stage in
the formation of the web shown in FIG. 1 into bags such
as -thaît shown in FIG.: 6;
10 by aline ’34 in FIG. 5 to'form Iaiinished bag 30 as shown
5 is :a fragmentary plan ‘view on a somewhat en
in FIGS. 6_8. Each succeeding bag segment may then be
larged ïscale, ¿showing Va stil-l »later stage in the formation
formed into #a finished bag inthe same manner. -If de
of the .web îshown 4in FIG. l-into bags .such as that shown
sired, »a staple V36a (FIG. 5) may conveniently be used
in
.6;
FIG/6 »is aplan .View of a'draw’string bag constructed
to fasten the .strings 23 'and 23' together «adjacent the
margin 32a 'ofthe .next succeeding vbag segment -30a be
in accordance with this invention;
FIG. 7 is ‘a top ‘end view of the bag` shown in FIG. 6;
fore severing the strings :as indicated by the >line 34 'be'
tw-een the 'staples '36’ and 33a.
ì
Pairs .of staples-such as 33’ and ßêarnay Vbe tired into
the strings '23 and 23’ by conventional ‘stapling ‘equip-Y
' -FIG. 8 is a crossasectional'view .taken at -3--8 ‘of FIG.
6 on a somewhat enlarged scale; and
LFIG. l9 is .a somewhat diagram-matic side elevational 20 mentfrand the strings may be vsevered Vbetween‘gthe staples
view of' apparatus suitable for making bags in accordance
of each such pair by any conventional cutting'knife. Àl'
with .the invention.
iternatively, a single staple head lmay ‘bensed capable "of
>Referring to the drawings, FIGS. 1-5 show various
ltiring two staples in close proximity to each other and
stages in the formation of a draw `string bag 30 vwhich is
simultaneously
severingto the
hereinafter.
strings "between "each r
shown in greater detail in FIGS. 6-8. Referring more 25 of staples, las referred
particularly to FIG. 1, a web or bag. strip 21 of polyethyl
Bags -suoh as the bag 3i) ‘shown more vvparticularly in
ene Asheet Vmaterial is shown advancing in the direction
FIGS. 6-8 may lbemade in any suitable size. Forin
indicated by an arrow 22. As the web ~advances, con
stance, bags ~measuring l5 inches by 10 -inches may beV
tinuous strings 23 and 23' are positioned adjacent the
Iformed from ,a web of -bag material measuring Y33 inches
longitudinal edges A24 ìand 24’ of the -advancing lweb and 30 wide by folding about 11/2 inches `of the web ‘material
these edges are folded »over the strings about fold lines in
over the strings along each longitudinal margin of ¿the
dicated'at -25 yand 25’. The folded over edges 24 »and 24'
web to form tubular hems as described above and then
are their heat `sealed zto opposed portions of the web
severing the bag material transversely at intervals of
as indicated by seal lines 26 and 26’ to form tubular
hems .27 andf27’ `containing the strings 23 and 23’ -and
about l0 inches.
forming the longitudinal marginsof the web. The web
21 is >then folded .about La longitudinal fold line 28 >tto
bring-the tubular hems.27 and 27’ into opposed relation
and toiform Aa folded web or .bag strip as shown in FIGS.
2 :and 3. V‘If desired, Vthe fold about the line 28 may be 40
gusseted so »as to form .a -bag having a gusset-ed bottom.
The -folded web is then severed vand sealed Ialong trans
verse Eseal lines such as 29 (FIG. 2) to form individual
l
Referring now to FIG. 9, apparatus is schematically
the
shown
present
vfor making
invention.
drawThis
string
apparatus
îbags inwill
»accordance
be ‘described
with kreference to the production -of -bags such as :that
shown in lFIGS. 6-8 by the process described in connec
tion with FIGS. 1-5. As shown `in FIG. '9, the bag strip
21, the vmaterial of which has been severed and sealedto
form bag ‘segmentssuch as 30, 30a and'l’ztìb without sever
ing the strings 23 and 23’ in accordance with the method
and apparatus disclosed in the above-mentioned applica'
bag segments such as.30, 30a and 30h having sealed side
margins 32, 32', 32a, 32a’.,.32b and l32h' to which the hems 45 tion Serial No. 773,029, is advanced in the direction in'di‘- v
such »as 427 and 27’ extend ias shown in FIGS. 4 and 5.
cated by an arrow 41 by means vof a pair of draw rolls
During this severing operation, the material of :the Web
including material of the hems 27 and 27’ surrounding
the strings 23 and 23’ is severed without ’severing the
42 and 42’. The thickness of the lbag strip 21 has 'been
exaggerated to better show the parts. At the stage of
the process shown in FIG. 9 thestrings 23 and 23' have
strings.
4The operations described immediately -above Vmay all
50
already been fastened together -by the staple V15S-outside
the bag Vsegment 36 adjacent the leading longitudinal side
be performed in the manner taught in the 'above men
margin 32 Vthereof in the manner to be described below
tioned Iapplication Serial No. 773,029 and the apparatus
described `in that application or other suitable apparatus
with respect ‘toy bag segment 30a.
segments such as '30, 36a and 30b as `described above,
the strings. 23 and 23’ of the leading bag segment 3'0 .are
rial ofthe hems faster than the rolls 42 and 42’ are ad
.
When the leading margin 32 of the {bag segment 30 has
may be used. If desired, the web may be maintained 55 been advanced to the point shown in FIG. 9, vgatherer rolls
under tension during the folding and sealing operations
43 and 43’ advance material of the hems 27 and 27’ of
while the .strings 'are positioned in a substantially un
the bag segment 30 with respect to the strings v23 and 2_3'
stretched condition as described in'application Serial No.
as -Well yas with -respect'to the succeeding 'bag segment'âßa',
thus puckering or gathering the hems of the bag segment
773,029 so »that release of such tension after the severing
and sealing operation results in small lengths of string 60 30. Additionally, the adjacent edges of the bag segments
being exposed between the bag segments 30, 36a and 30b
30 and 30a are thus sepa-rated ‘so as to provide an in
creased space and intervening length of string to facilitate
as indicated at 31 in FIG.A4, but it should be understood
that such means of obtaining lengths of exposed string
ñxing the staples a safe distance from the ends of thecut
between the bag segments may be dispensed with when
strings to prevent the staples from slipping oiî. If desired,
65 the hems of the :bag lsegment 30 may -be puckered by
making bags in laccordance with the present invention.
merely causing the rolls 43 and ‘43’ to advance the mate
vFollowing the severance -of the .bag strip 121 into bag
vancing the material of the bag segments yand the strings
23 and 23’.
fastened together as by >a staple 33 outside the bagseg
rnent Iand «adjacent one longitudinal .side margin 3-2 there 70 'When the bag segments 30and 30a are in the position
shown in FIG. 9 and »the hems of the bag segment 30
o'f (FIG. 5). Material of the hems of the leading bag
have ybeen puckered as shown, the strings 23 and.23' areV
segment 30 is then advanced towards the sta-ple 33 with
fastened together outside the bag segment 30 adjacent the
respect to the strings 2-3 and 23’ to form puckers 50 along
longitudinal margin y32’ thereof by the staple 33’ which
the hems 27 and 27’ of the bag segment 30 :as shown‘in
FIGS. Stand 6. The strings -23fand 23’ are -then fastened 75 is spaced along the str-ings 23 and 23' from the staple 33
3,079,966
a distance less than the full width of the bag segment 39
transverse edges of said panels being provided with tubular
so as to retain the hems of the -bag segment 39 in a per
lips forming an open mouth of said bag, each of said
manently puckered condition. The staple 33' may be
tubular lips extending to the respective longitudinal
tired by a staple machine 46 which may conveniently tire
the staple 33a outside the bag segment 36a and adjacent
margins of the bag and containing a draw string, said
draw strings being fastened together at respectively op
the longitudinal margin 32a thereof simultaneously with
firing the staple 33'. The staple machine 46 is illus
posite fastening points outside the longitudinal margins of
taneously and sever »the strings, lbut it should be under
stood that the staple machine 46 may comprise two con
‘the bag, said points being spaced apart a distance less than
that between the longitudinal margins of the bag, whereby
each of said tubular lips is retained in puckered condition
ywhen said open mouth of the bag is fully open.
2. A draw string -bag comprising front and lback panels
of ñexible, heat severable material connected together
ventional single staple heads spaced a suitable distance
apart. Alternatively, the staple machine 46 may corn
prise a single staple head adapted to tire »the two staples
in succession as the strings 23 and 23’ and the bag seg
along longitudinal margins of the bag, transverse edge
portions of said panels respectively being provided with
opposed tubular hems extending substantially the full
width of the Ábag between said longitudinal margins and
ments are advanced as bythe draw rolls.
forming an open mouth of the bag, each of said tubular
After the strings 23 and 23’ have been fastened to
gether by the staples 33, 33’ and 33a as described above,
and the strings severed between the staples 33’ and 33a
by means such as a suitable cutting blade 47, the ñnished
hems containing a draw string, said draw strings being
fastened together `outside of the bag adjacent the respec
bag 3i) is separated from the succeeding bag segment 33a
than the distance between the respective ends of said
»tubular hems, whereby each Iof said tubular hems is re
tained in puckered condition when said open mouth of
the bag is fully open.
3. A draw string bag comprising front and back panels
trated as being a single staple unit such as disclosed and
claimed in my co-pending application Serial No. 858,659,
filed December 10, 1959, adapted to lire two staples simul
and successive bags such as 3G are lthen discharged through
delivery rolls 48 and 4S'.
In order to assist in the advancement of the bag seg
ments and the discharge of »the iinished bag 341 a series
of transversely spaced parallel belt loops 49 and 49’ of
cord or other suitable material are preferably positioned
around the rolls 42 and 4S and 42' and 48' and driven
by one or both pairs of these rolls to provide conveyor
means for advancing bag segments and discharging
finished bags.
The subject matter shown and described herein but not
claimed, forms the subject matter of one of my said co
pending applications or an application which is a division
of this application, i.e., Serial No. 90,530, filed February
20, 1961.
While the invention has been described in detail with
respect to certain preferred embodiments, -it will be un
derstood by those skilled in the art that Various changes 40
and modifications may be made without departing from
the spirit and scope of the invention and it is intended to
cover all such changes and modiñcations in the appended
claims.
What I claim is:
t@ Cil
1. A draw string bag of flexible, readily severable ma
terial comprising front and `back; panels connected to
gether along longitudinal margins of the bag, opposed
tive longitudinal margins lthereof at respectively opposite
fastening points spaced apart a distance substantially less
of llexible, readily severa-ble material secured together
along longitudinal margins of the bag, opposed trans
verse edge portions of said panels respectively forming
an open mouth of said bag, each of said edge portions
being provided with a tubular hem extending to the longi
tudinal margins of the Ibag respectively, each of said
tubular hems containing `a draw string, said draw strings
:being fastened together outside the bag adjacent the
respective longitudinal margins thereof at fastening points
spaced apart a distance less than that between the longi
tudinal margins of the bag, whereby said tubular hems are
retained in a puckered condition when said open mouth
of the bag is fully open.
References Qited in the iile of this patent
UNITED STATES PATENTS
2,390,423
2,656,769
Carter _______________ __ Dec. 4, 1945
Hultkrans _____________ _„ Oct. 27, 1953
2,678,672
2,758,519
2,777,491
Spilrnan _____________ __ May 18, 1954
Steen ________________ __ Aug. 14, 1956
Ashton et al. _________ __ Jan. 15, 1957
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