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Патент USA US3100601

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Aug' 13, 1963
R. .1. WILLIAMS Erm.
3,100,596
_BAGS
Filed July 1o, 1961
FIGA.
9
4
9
United States Patent O
1
1
y IC@`
3,100,596
Patented Aug. 13, 1963
2
bag. A line of stitching indicated at 11 is driven through
3,109,596
the tape and through the walls of lthe bag securing to
BAGS
gether the walls adjacent the end of the bag. The length
Russell J. Williams, Clayton, and August F. Ottinger, St.
of the tape 9 is ygreater than the width of the bag, and
Louis, Mo., assignors to Bemis Bro. Bag Company, St. 5 the tape has end portions 13 and 1S which extend past
Louis, Mo., a corporation of Missouri
the side edges of the bag. The stitching 11 extends
Filed July 10, 1961, Ser. No.`122,821
completely throughout the length of the tape and, as
8 Claims. (Cl. 229-66)
rl‘his invention relates to bags, and more particularly
to unravelable stitch type closures -for bags.
In certain respects, this invention is an improvement
upon a closure such `as disclosed in United States Patent
2,978,164, issued April 4, 1961, comprising a paper tape
1
shown, may be driven through a narrow paper ribbon
i7 constituting a so-called filler cord located on -the side
of the bag which is referred to as the needle side, this
side being the side which faced the needle of the sewing
machine employed for stitching.
In accordance with this invention, the stitching at l11 is
of a single thread readily unravelab'le `chai-n stitch type.
".[lhe single thread used for this stitching is designated |19.
As will be understood by those conversa-nt with the art,
the stitching is formed hy feeding the «bag with the tap-e 9
folded around the end of the «bag through la sewing mia
tab adhered to the tape over this end of the thread and
adapted to be grasped and pulled away from the tape
chine having a needle which drives loops 21* (see FIG. 2)
to unravel the thread. While the adhesive securing the 20 of the thread 19‘ through the bag, thereby forming needle
tab to the tape is ordinarily elfective to anchor the thread
holes 2.3 in the bag (see FlGS. 3 )and 5), the loops extend
ing from the needle side of the tape '9 through the needle
against unraveling until it is desired to open the bag,
holes to the other side of the tape, each loop being laid
in some instances the loops of thread at the end of the
thread from which unraveling progresses may tend to
over on `the said other side «and extending through the
preceding loop 21. Reference may he made to United
come loose, as, for example, due to a rubbing action on
the loops, or to spreading open of the end of the folded
States Patent 2,978,164 `for «a `detailed illu-stnation of this
closure tape. Accordingly, it is an object of this in
type tof stitching, which is unraveled with ease by taking
vention more effectively to anchor the end of the thread
hold of that end of the thread which is ‘at the trailing end
to prevent it lfrom unraveling until it is desired to open
of the stitching in relation to the passage of the bag
the bag, without making it any more difii‘cult deliberately 30 through the sewing machine, this being the end of the
to unravel the thread when it is desired to open the bag.
thread at that end of the stitching in the direction in which
In general, this is accomplished by providing a localized
the lio-ops lare laid over (the right end iof the stitching as
` application of adhesive to the loops of the thread on
illustrated in FIGS. 1 and 3 of »the drawings herein). It
will he understood that unraveling proceeds by succes
the looper side of the tape at the end of the tape from
which unraveling of the thread progresses, and by ad
sively pulling out the loops 21, the pulling out of each
hering the two halves of the folded tape together at this
loop lfreeing the next loop so that it may loe pulled out.
end of the tape. As regards the latter application of
At 35 is indicated a pull tab which is releasably secured
adhesive, it is preferably applied spaced inward from
to the end portion 15 of the tape (the end from which un
the thread so as not to interfere with the stitching op
raveling `of the thread 19 progresses) over the thread on
eration. lEither one or both of these applications of 40 the needle side of the tape. The adhesive by means off
adhesive may be used, and they may be used per se or
which the tab is secured to the tape :appears in FIG. 3,
in conjunction with the tab or With any other type of
bein-g designated 37. As shown, the tab 35 ‘consists of a
arrangement for pulling the thread to unravel it. Other
strip of paper narrower than the folded tape 9‘. It ex
objects and features will be in part apparent and in part
tends lbeyond 'the end of end portion 15 of the tape, so as
45 to provide a projecting tah end portion 39 for easy grasp
pointed out hereinafter.
The invention accordingly comprises the constructions
ing. The adhesive extends from ‘the inner end 41 of the
hereinafter described, the scope of the invention being
tab »all the way to the end of the tape. it may 'be a heat
indicated in the following claims.
scalable adhesive, paste, or any other suitable type of
In the accompanying drawings in which one of various
adhesive. At 43 in FIGS. 2 and 4 isl indicated a I.localized
possible embodiments of the invention is illustrated,
application yof adhesive, preferably paste, to the loops of
FIG. 1 is a View in elevation of one end of a bag
thread `on the looper side of end portion 1S of the tape 9.
having a closure of this invention, showing the needle
This adhesive is show-n las. applied on a relatively narrow
band over »the loops (on the other side of the folded tape
side;
IFlG. 2 is a View of the back of FIG. l, showing the
9 from the tab 35) extending for some distance inward
55 from the end of end portion 15 of the tape (typically for a
looper side;
FIG. 3 is a vieW showing the unraveling of the thread;
distance of »about one inch). At 45 in FIGS. 4 rand 5 is
FIG. 4 is an enlarged section taken on line 4_4 of
indicated an ‘application of adhesive, such as paste, be
FIG. l; and,
tween the two halves of -the dolded t-ape 9 `for adhering
FIG. 5 is -a view of the upper right corner of FIG. 1,
together the two halves of the tape included in end por
showing a portion of the closure tape unfolded 4to reveal 60 tion 15 of »the tape. As shown, adhesive 45 is provided
folded around an end of a bag and extending beyond
the side edges of the bag, a line of single-thread stitching
driven through the tape and through the walls of the
bag and unravelable by pulling it from one end, and a
adhesive such as is applied to adhere the two halves of
the tape together.
yCorresponding reference characters indicate corre
sponding parts throughout several views of the drawings.
in a relatively narrow band spaced inward from the thread
19 so as not to interfere with the stitching operation.
The adhesive at 37 and `43 secures the end of the thread
fnom which unnaveling progresses to the tape '9; and hence
Referring to the drawings, a rnultiwall paper bag 65 anchors this end of the thread to prevent unraveling of the
having an end closure of this invention is indicated at
thread, such as might'occur in the absence of such anchor
1. For simplicity, the bag is shown as a two-ply bag,
ing, even under severe strains such as may occur due to
the inner ply being designated 3 and the outer ply 5.
dropping or other rough handling of the bag. The adhe
It will be understood that a multiwall bag usually will
sive at 43 »anchors the loops 21 at the end of the thread
have more than two plies. As shown, the bag is a gus 70 fno-m which unnaveling progresses and prevents the end
seted bag, the `gussets being indicated at 7. The closure
loops from becoming loose even though there may be a
includes a paper tape 9 folded around the end of the
rubbing action on the loops. It 'will `be observed that the
3,100,596
4
thread is »anchored to «the tape at a point outward of the
side edge of the ibag, which means that the anchor is not
subject to severe strains which, when the -bag is dropped,
corne on the portion of the stitching which extends from
2. A multiwall paper bag as set 'forth in claim 1, fur
ther comprising adhesive between the two halves of the
folded tape securing said halves 4together at said one end
of the tape.
3. A multiwall paper bag as set forth in claim 2 where~
in the adhesive between the -two halves of the folded tape
is spaced inward from the thread.
4. A bag having at least one end closure constituted
by a tape folded around the respective end of the bag, a
one side `edge ofthe bag to the uother. With the anchor
so located it is also insured that there will -be no unravel
ing whatsoever of the stitching inward past the side edge
of the bag such ias would open up the Sbag and cause loss of
its contents. The adhesive at 45 prevents the two halves
of the folded tape 9‘ from spreading apart at the end of 10 line of stitching driven through the tape and through the
the thread from which unraveling progresses and thus
eliminates the possibility of the loops at ‘this end of the
walls of the bag >and securing together the walls adjacent
said end of the bag, the length of said tape being greater
thread coming loose such as might otherwise occur he
cause of spreading apart of the two halves of the rolded
than the width of the bag and end portions of the tape
extending past the side edges of the bag, the stitching
tape.
extending completely throughout the length of the tape,
the stitching being of a single thread readily unravelable
chain stitch type which has loops extending from one
35 at a point from which unraveling of the thread may be
side of the tape through needle holes to the other side
started, i.e., it secures the end stitch »of the thread to the
of the tape, each loop being laid over on the said otherV
tab. To open the bag, it is simply necessary to grasp and
pull the tab. As shown in FIG. 3, the tab comes away 20 side of the -t-ape, said thread being readily unravelable
by pulling one end 0f the thread from one end of the
from the tape carrying with it the thread 19, which un
tape, and a localized application of adhesive over the
ravels and pulls out :of the needle holes in the bag. The
loops of the thread on the other side of the tape at said
loops pull out readily from ladhesive 43. Adhesive 45 is
one end of the tape, said localized application of adhesive
not in contact with the thread, «and does not impede un
raveling.
25 securing the loops of the thread at said one end of the
tape against coming loose due to rubbing, while permitting
In view ot' the above, it will be seen that the several
the loops of the thread at said one end of the »tape readily
objects of the invention lare achieved and other advan
to come loose when the thread is deliberately pulled to
tageous results attained.
unravel it.
As warious changes could be made in the above con
5. A bag as set forth in claim 4, further comprising
structions without departing from the scope of the inven 30
The adhesive iat 3-7 also secures the thread to pull tab
adhesive between the two halves of the folded tape secur
tion, it is intended that all matter contained in the above
ydescription ‘or shown in the accompanying `drawings shall
ing said halves together at said one end of the tape.
6. A bag as set forth in claim 5 wherein the adhesive
be interpreted as illustrative and not in a limiting sense.
between the two halves of the folded tape is spaced in
We claim:
1. A multiwall paper bag having at least one end clos 35 ward from the thread.
7. A bag having at least one end closure constituted
ure constituted by »a paper tape folded around the respec
by a paper tape yfolded around the respective end of the
tive end of the bag, `a line of stitching driven through the
bag, a line of stitching driven through the tape and through
tape and through the Walls of the bag and securing to
the walls of the bag and securing together the walls adja
gether the walls adjacent said end of the bag, the length
of said tape being greater than the width of the bag and 40 cent said en-d of the bag, the length of said tape being
greater >than the width of the bag and end portions of
« end portions of the tape extending past the side edges
the‘tape extending past the side edges of the bag, the
of the bag, the stitching extending completely through
stitching extending completely throughout the length of
out the length of the tape, the stitching being of a single
the tape, the .stitching being of a single thread readily un
thread readily unravelable chain stitch type which has
loops extending from one side .of the tape through needle 45 ravelable chain stitch type which has loops extending from
one side of the tape through needle holes to the other
holes to the other side of the tape, each loop being laid
side of the tape, each loop: ‘being laid over on the said
over on the said other side of the tape, said thread being
other -side of the tape, said thread ‘being readily unravel
readily unravelable 'by pulling one end of the thread from
able by pulling one end of the thread from one end of
one end of the tape, a tab releasably secured to said one
side of the tape over said one end of the thread by adhe 50 the tape, and adhesive between the two halves of the
folded tape securing said halves together at said one end
sive and Áadapted to be grasped and pulled away from the
of the tape.
tape, said adhesive also anchoring the thread against un
8; A bag as set iorth in claim 7 «wherein the adhesive
raveling until it is desired to open .the bag and securing
is spaced inward from the thread.
the thread to the tab at a point from which unraveling
of Ithe thread may be started, whereby, upon grasping 55
and pulling the »tab- away from the said one end of the
References Cited in the ñle of this patent i
tape, the thread is pulled away with the tab and unraveled,
UNITED STATES PATENTS
and a localized application of adhesive applied over the
2,527,073
Port _______________ __ Oct. 24, 1950
loops of the thread on the other side of the »tape at said
Williams ____________ _.. Apr. 4, 1961
one end of the tape, said localized application of adhesive 60 2,978,164
securing the loops of the thread at said one end of the
tape against coming loose due to rubbing, while permitting
FOREIGN PATENTS
the loops of the thread at said one end of the tape readily
to come loose when the thread is deliberately pulled to
unravel it.
'
`
65
481,327
481,328
Canada _____________ _.- Feb. 26,
Canada _____________ _.. Feb. 26,
1952
1952
..
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