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Патент USA US2404337

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Jug}? 33-5, i946
a. wmumms ET AL
I
BIXG- 'C/LOSURE MEANS AND METHOD
Filed April 13, 1944
FiGi.
2,404,337
4
2 sheets-sheet 1'
‘
July 16, 1946.
R. J. WILLIAMS ETAL-
2,404,337
BAG CLOSURE MEANS AND METHOD
Filed April 13, 1944
FIG-.6,
\\\ \'
2 Sheets-Sheet 2
"Patented July 16,n1946
2,404,337 '
UNITED sTATEs PATENT oF FICE'
'
2,404,337
BAG CLOSURE
.
'
METHOD 1
Russell J. Williams,>Richmond Heights, and Har
old 0. Davis, 'St. Louis, Mo.-', assignors to Bemis.
Bro. BagCompany, St. Louis, Mo., a corpora
tion of Missouri
Application April 13, 1944, Serial No. 530,809 _ I
' '
9 Claims. (01. zzsl-e'z)
1
' Fig. .11 is a view similar to" Fig. 10 showing a '
?nal operation of positioning the second prfotec- .
. This invention relates to a bag closuremeans
and method, employing an adhesively attached
cover strip.‘
'
"
‘
-
g
tive tape;
'
Among the several objects of the invention'may
be noted the provision of a bag closure and a con- I
venient method of manufacturing the same, in
which a cover strip is pre-applied to a bag, which
’ Fig; 12 is a view vsimilar to Fig. 11 showing ‘
the protective strips removed and showing in
dotted lines’how the closure is manipulated for
?nally closing a bag;
"
strip carries substantially permanently tacky ad
‘Fig. '13 is a vertical section showingv‘alterna
tive possibilities in respect to the second protec
hesive for ?nal closure but which adhesive‘ is pre
vented from sticking prematurely to adjacent 10 tive strip in connection with‘bag ?lling opera
~ parts during shipment to the bag user; the pro
vision of adhesive protective means which is thor
tions; and,
*
Fig. 14.15 a perspective view showingia com- <
oughly e?ective despite wide variations in manu
facturing accuracy; and the provision of pro
tective means of the class described which may
conveniently be ripped out of position when a
bag is ready for ?lling or has been ?lled, so that
the bag may be closed thereafter. Other objects
will be in part obvious and in part pointed out
pleted closure on a bag, case liner‘ or the like‘.
Similar reference characters ‘indicate ‘corre
spondingparts throughout‘ the several views‘. of
the "drawings.
.
' -
i
lustrated one of variouspossible embodiments of
the invention,
.
Fig. i is a diagrammatic plan view of one com
ponent of certain adhesive and ?rst protective
'
J
V,‘
'
.
‘ bag may be," of any. suitable variety,psuch.asfmulti
ply, waterproof paper,;closed at the :bottom. as
will be exempli?ed in the structures and methods I
In the accompanying drawings, in which is il
'
tacky asphalt‘ 3, and a protective cover strip-5
overi§the ‘asphalt such as .“CellophanePTThe
The invention accordingly comprises the ele
ments and combinations of elements, steps and
sequence of steps, features of construction and
manipulation, and arrangements of parts which
ing claims.
I
ing to the‘ mouth end of a bag l‘such asishown
.in Fig."3 .a band of adhesive such as permanently
hereinafter. '
hereinafter described, and the scope of the ap
plication of which will be indicated in the follow
.
In'Figs. 1.and.2 is shown appétratusforapply
shown‘at ‘I. Its open mouth, is shown at 9. It
'may also be vany equivalent of a bag," suchias a.
case liner or'the like.
.
.
"
v
‘
.,
i
.
'
The‘ apparatus of Figs. 1 and 2 consists in live
rollers ll connected by a belt driverl3 to rotate
.in the same direction indicated, one oithe rollers
5 30 being driven‘ by a belt drive I5 from a motor ill.
The belt drive I5 also drives an adhesive-applying
disc l9, which dips into a sump 2! of hot asphalt
23. Heating is accomplished by an electric heater
tape applying means;
25. Excess, but not all of the asphalt is'wiped
Fig. 2 is a front elevation of Fig. 1;
~35 fromthe surface of disc [9 by a scraper It. ..
Fig. 3 is a perspective view showing the result
Gravity idler pressure rolls 21. are supported ’
of operations carried out upon the apparatus of
upon swinging frames 29 which pivot on pins 31.
Figs. 1 and 2;
Pins 3| extend from a'frame 33. Extending from
Fig. 4 is an enlarged diagrammatic vertical sec
this frame 33 are other pins-35 carrying pressure
tion taken on line 4—4 of Fig. 3;
guide springs 31; A straight-line guide 39 serves
Fig. 5 is an enlarged diagrammatic horizontal
to direct themouth edgeof‘a'n entering bag I to
section taken on line 5-—5 of Fig. 3;
‘
pass under the springs 31 and into contact with
Fig. 6 is a diagrammatic plan view of a second
the upper arc of roll IS. The combinations of rolls
component for applying a cover strip and a sec
ll, 21 force the bag mouth forward, while'the
, 'ond protective tape, parts being broken away;
v45 springs 31 depress it into‘ engagementwith the
Fig. 7 is a front elevation of Fig. 6, being viewed
asphalt-faced edge of the disc [9. v'Thisa'pplies
from line 'l—‘! of Fig. 6,:part's being broken away;
the band of asphalt which appears in Figs. 3,4
Fig. 8 is a diagrammatic, enlarged vertical sec
and 5. The purpose of the springs 31 is‘to assure
tion taken on line 8-8 of Fig. 6;
that this band of asphalt will be carried entirely
Fig. 9 is a diagrammatic enlarged vertical sec 50 from edge to edge of the b'a‘g'mouth, as detailed
tion taken on line 9—9 of Fig. 6;
.
Fig. 10 is a view similar to Fig. 9 showing cer
tain parts folded outward, the dotted lines show
ing a transition operation toward the condition of
rig-n;
,_
I
_.
.
v
I,
v
a,
at2inFig.4.
‘To the ‘right of the"asphalt-applying‘
"
"
-~'appa
ratus'is a table 4| with a support 'for' ‘a’ supply
roll 410i a suitable ‘cover material" such as, for
example-a strip 5 ‘0f “Cellophane” which is wider
2,404,337
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.
'4’
3
-
~ "
ganized asphalt-covered strip 53 and folded cover
than the asphalt band 3. ‘This material is with
tape 6‘! pass through the folder 53, the month
end of the bag (to which has been applied said
asphalt strip 3 and cover 5; see Fig. 3) is fed.
into the jaws of the folder 63, along with 53 and
61 as indicated at the left ofFig. '7. This causes
vances over the table from rollers ll, 21, one
the exposed portion of the asphalt 81 to adhere
edge ofthe strip 5 becomes located next to one
one part of the cover tape to the side 6 of the
edge of the'bag mouth 9, and also next to one
bag mouth. This places it opposite to the pre
edge of the asphalt band 3. Thus the strip 5 cov
ers the asphalt band 5 and adheres to it through 110. viously applied strip 5. What occurs as the ma
terials pass through the folder 63 is illustrated
out the width of the bag on one of its sides 4..
in ‘Figs."8 and 9. After the bag mouth leaves
Next, the cover strip 5 is cut so as'to le‘ave'ex'n‘v
drawn from the roll 43 and is passed over an
idler roller 41 to the top of the table 4|. One '
edge of this strip 5 of protective material moves
adjacent to the guide 39. Thus as the bag ad
tensions 5|, indicated in Fig- 3. The above .mar-1 ._ :the folder . 63, . the ends of the combination of
ginally applies to one sideil of the mouth of the;
bag a permanently tacky adhesive _3 covered by a
removable protective strip 5. This is also indi
‘ . ,cated in the enlarged Figs. 4 and 5. . ,
Figs. 6-9 show how a cover tape'and an addi-i '
‘tape Gland 'coverstrip 53 are cut in line with the
ends of the tabs'5 I.
'
. From the above it will be noted that the single
ply “Cellophane” cover strip 5 and the folded
double-ply .cover strip‘ 61 prevent any folding
tional cover strip are applied to the other'side '. overof the cover strip‘ as shown in Fig. 9 from
of the open mouth 9 of. the bag. The cover tape 20 effecting an adhesion on side 4 of the bag. Ad~
hesion occurs only of .tape 53 to ‘sides of the bag.
" .per se is shown at numeral 53 in Fig. 8, for ex
This is because "Cellophane” 5 contacts “Cello
ample, and may be of waterproof, .multieply or
phane” 5?. Thus the attached cover tape parts
>_ other paper, fabric or the like. In Fig. 6 a con
may freelybe reopened to the. position ‘shown in I
tinuous length of this material 53 is shown as
being Withdrawn-from a roll supply (notshown) v25 Fig. 10. The operator thenmanually. folds ‘the 7
free par-t ‘H .of. the folded. strip through the'dotted
and passed over an adhesive applicator. roller
line position..~and. applies ?ngeripressure at the
55 which dips into a pan 5'! of heated asphalt 59.
arrow shown .in-Fig. 1.1, which completes the
Thusthis‘. cover strip becomescovered on one side
coverage and protective effectof the strip .61.
withasphalt. It isithen twisted and passed over
a vertical guide roller 3!‘, the asphalt being out 130 This prevents the exposureef the asphalt (ad
hesiveshown at E in Fig. .10.,.:ex'posure E‘ being
side with respect to this roller. From this point
due toinaccuracies of alignment in the folder 69.
‘a it passes to the left (Fig. 6) into an ordinary
The. resulting completely. protected condition is
folder 63 for symmetrical V-shaped folding upon
shown. at thearrow in Fig. 11. 1 It should-be'un
itself with the asphalt. coat inside.
..
. Prior to. entering. the folder, a folded protec 35 derstoodlin connection .withJall the diagrammatic
tive strip 61 is applied to about one-halfeof the
?gures that thicknesses of theivarious materials
‘ " coyepstpip 53, .This strip 61. is of a material like
have been exaggerated and that actuallytheyare
that of theprotective tape 49,.for example “Cello-. . so thin that theexaggerated offsets do not actu
phane.” . It is withdrawn :from :a ‘supply. such
Unclosed bags may be stacked ‘for shipment,
as indicated at .65 .(Fig. ,7); passed over a guide .40
either in the .condition shown in Fig; 11 or the ~
‘roller 68 and drawn through afolder 69, wherein
cover strip maybe turned back to the/‘Fig. 10
it-isfoldedupon iitselfrbut preferably not quite
allyexist.
.
.
,
conditionbut-of vcourse'without reintroducing the
exposure E. . Thus, ineither event, the asphalt
one toward the readenFig. 7) is allowed 'toe’xe
tend ‘beyond the otherlledge 13. In vpassingoutof as adhesive .is completely :protected against stick
symmetrically. “For example, .one edgen'll' .(the
the folder 69, this strip is passed between a pair
ing to adjacent :parts.
of creasing rollers ‘l5 which are carriedon the
When it comes time to ?lla bag, two procedures I
are possible. One is to treat it as shown ‘in Fig.
13 wherein the mouth is openedland ‘thefedge- ll
ends of cross-pivoted scissor tongs ‘H, the latter
being pulled together by. means of. a spring. 19.,
,
.,
This biases the. rollers .15 toward one another. 150 allowed to position its central portions ‘within the
.The pivot for the tongs is shown at.8l, being
bag. Or 1: may be folded againsmsras'm Fig.
on and near the end of the folder69. Thus the
10) . -After or before ?lling, the protective strips
5 and 61 may be ripped away by grasping their
folded “Cellophane” strip. is de?nitelypinched
vfree edges and pulling them;i"from thesrtacky
‘ as it leavesthe folder and thus provided with a
‘ crease 83 which prevents it from springing open 155 asphalt. It will be remembered that‘rthe ad
too readily. Unlike many other materials such
as paper, “Cellophane” requires this extra creas
hesive is still tacky, beingof the requisitetype to
ing when leavingan ordinary folder.
Foldersordinarily cause enough break atthe
harden during its useful life on the bag. '
produce‘this condition. It does not permanently
JStripping away these protective strip-s Icon
crease'of some materials such aspaper to cause 60 verts the bag from the! condition shown‘in Fig. 3'11 e
to that shown in Fig. 12.
them to maintain their folded 'form.- Materials
such as “Cellophane” do not obtain suflici‘ent
As stated, ‘this may be
done
advantagelof
either after
‘the invention
the ‘bag isis?lled
that'the
or before;
loose edges
7
break in this manner to cause a crease .to- be
of thestripsB and 61 are directed toward ‘the
maintained. By means of the spring bias rollers
15, the de?nite. break or crease 83 is assured 65 bottomqof the-bag .(Fig. 11)‘ so that an operator
‘may have an effective purchase on the main'body
whereby this protective strip properly maintains
its folded condition.
_
.
.
.
'
From; the creasing rollers, the folded tape 61
of the :bag while pulling‘zoff the strips. ‘ 'Thisidis
V tingui'shes from a condition’ where the strips
might have free edges extending lint-he-otherdi
roller 6! into engagement with theoutside as. 70 rection which would make it more di?icult to
phalt 8'! on'one-half of the cover tape53. Align
withdraw or separate them’ without a'rsuitable
passes over a vertical guide roller 85 andxat
.ment is such that the retracted edge. ‘l3fis about 1
at the upper edge at the tape 53 and hence also
Durchaseon
.Finally, lthebag
thebag.
may be I. closed
by moving
' '
the
at the upperedge of said asphalt coatinglB'I. on
free. endof the cover tape t‘!v from the solidqine
tape53.,,Edge,1,l, of ,6‘! ‘is clean, As theor
position shown in Fig. 12 through the dotted-line
‘2,404,337
J5
position andoven the oppositevside of the bag.
Since this brings'together.‘exposed 'areas of now
exposed tacky‘ asphalt, thefclosurebecomes com
''pleted
“It will
asbe
shown
clear inYFig-g
thatia great
14.1‘ ' degree
Ti? of accuracy
' 1 1
'4. :A CIOSHI‘GffOl‘ the mouth of a bag or the like
comprising a‘ band 'of perm'anentlytac'ky adhe
sive on‘ one margin of‘ the mouth,_ a protective
stripi coveringsaid band and being .widerthan
the same in a ‘direction away from'saidmouth, a
bendable cover tape covered on one side with per-,
in applying the adhesive and‘ protective‘ strip is
manently tacky adhesive and attached thereby
not essential; IIIf the cover strip 6‘! falls short
to theother margin of said mouth and extending
of the bag mouth‘ byz the'distan'ce shown at E
beyond the same, and a V-shaped Protective strip
'(Fig. .10) ; due, for ‘example, to‘ errors in automatic
application, this error may easily be corrected by 10 having one side attached to the extending por
tion or said cover strip by the‘ adhesive on the
the operation illustrated in Fig. .11,'wherein the
tape. and having the ‘other side freely movable for
‘extension H is sent through ‘thei'dotted-line po
sition-(Fig.- -10)i-and‘-thel_-strip 61 pressed down
layingi'over said ?rst-mentioned protective strip,
the length of said second side being greater‘ than
to closel'th'e' g'ap’E. > The-invention allows bags
with pre-applied tacky adhesive and a cover tape -15 that of the other, both of said protective strips
being removable from the adhesive by a pull,
to be shipped without danger of sticking to one
whereupon the cover tape may be bent to cause
another or adjacent articles. The method of
exposed tacky adhesive thereon to adhere to said
manufacture is easy by the simplest of apparatus
?rst-named band of tacky adhesive to close the
and may be carried out at high production rates.
Although the term bag has been used herein 20 bag.
5. A bag mouth construction comprising a
to identify the package form, it is to bev under
bendable tape covered with tacky adhesive and
stood that the invention applies to all similar
attached to one margin of said mouth and ex
articles such as case liners and the like.
tending therefrom, a band of tacky adhesive on
In view of the above, it will be seen that the
several objects of the invention are achieved and 25 the other margin of said mouth and covered by
a protective strip ?ush with the bag mouth but
other advantageous results attained.
wider than said band, and a protective strip cov
As many changes could be made in- the above
ering the adhesive which is exposed on said cover
constructions without departing from the scope
tape and having a free marginal portion extend
of the invention, it is intended that all matter
contained in the above description or shown in 30 ing over the mouth of the bag and over said
?rst-named protective strip, both of said pro
the accompanying drawings shall be interpreted
tective strips being adapted to, be removed from
as illustrative and not in a limiting sense.
We claim:
'
their supporting adhesive by stripping, whereby
'
the cover tape may be folded to adhere said ad
1. A closure for the mouth of a bag or the like
~
comprising a band of adhesive along one margin 35 hesives for closure purposes.
6. A closure for the mouth‘ of a bag or the
of the mouth, a removable protective strip cov
like comprising a band of adhesive along one
ering said band, a cover tape covered on one side
margin of the mouth, a removable protective strip
with adhesive and attached thereby to the other
covering said band, a cover tape covered on one
margin of said mouth and extending beyond the
same, and a removable V-shaped protective strip 40 side with adhesive and attached thereby to the
other margin of said mouth and extending be
having one side attached to the extending por
yond'the same, and a removable V-shaped pro
tion of said cover tape by the adhesive on the
tective strip having one side attached to the exe
cover tape and having its other ‘side freely mov
tending portion of said cover tape by the adhe
2. A closure for the mouth of a bag or the like 45 sive on the cover tape and having its other side
freely movable, the juncture between the sides
comprising a band of permanently tacky adhe
of the V-shaped protective strip being positioned
sive along one margin of the mouth, a remov
closely adjacent to the mouth of the bag.
able protective strip covering said band and be
able.
,
~
7. A closure for the mouth of a bag or the
ing wider than ‘the same in a direction away
from said mouth, a bendable cover tape covered 50 like comprising a band of adhesive along one
margin of the mouth, a removable protective strip
on one side with tacky adhesive and attached
thereby to the other margin of said mouth and
when ?at extending beyond the same, and a re
covering said band, said strip being wider than
said band and extending in a direction away
from the bag mouth, a cover tape covered on
movable V-shaped protective strip having one
side attached to the extending portion of said 55 one ‘side with adhesive and attached thereby to \
the other margin of said mouth and extending
beyond the same, and a removable V-shaped
protective strip having one side attached to the
over said ?rst-mentioned protective strip either
, extending portion of said cover tape by the ad
when the cover strip is ?at or when bent over
on the cover tape and having its other
said mouth.
60 hesiveside freely movable, the juncture between the
3. A closure for the mouth of a’bag or the like
sides of the V-shaped protective strip being posi-,
comprising a band of adhesive along one margin
tioned closely adjacent to the mouth of the bag.
of the mouth, a removable protective strip cov
8. A closure for the mouth of a bag or the like
ering said band and being wider than the same
in a direction away from said mouth, a bendable 65 comprising a band of adhesive along one margin
of the mouth, a removable protective strip cov
cover tape covered on one side with adhesive and
cover tape by the adhesive on the cover, tape and
having its other side freely movable for laying
attached thereby to the other margin of said
mouth and when ?at extending beyond the same,
and a removable V-shaped protective strip hav
. ing one short side and one long side, said short
side being attached to the extending portion of
said cover strip by the adhesive on the cover
tape and said long side ‘being movable beyond
the unattached edge of said tape or over said
?rst-mentioned protective strip.
ering said band, said strip being wider than said
band and extending in a direction away from
‘the bag mouth, a cover tape covered on one
70 side with adhesive and attached thereby to the >
other margin of said mouth and extending be
yond the same, and a removable V-shaped pro
tective strip having one side attached to the ex
tending portion of said cover tape by the ad
75 hesive on the cover tape and having its other
2404,33? ‘
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8
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‘
side ifreelyemovable, the ’ juncture between .the
gin‘ of said mouth and‘ extending beyond. the
sidesvof theNeshaped protective strip being posi
tiqned Jclosely adjacent to the mouth-of the bag,
same, and a ‘removable 'y-shapediprotective strip
thelength of the freely movable side. :of said-1v
tion or said cover tape by the adhesive on the
cover tape and having its‘other sidie freely :mov
ablehthe edge of ‘the attache'dsidc andjthat'oi ‘
the cover tape being flush, ‘the juncture met-ween?
the "Sides of the V-shaped protective strip vbe
shaped protective strip'being greater ‘than its
' attached side.
. 9.'.A.'c1osure for the mouth'cf a bag or the
like comprising :a band No.1’, adhesive ‘along .one
having one side attached to therextending TPOY- _
ing Positioned :ciosely ,adjacentto the mouth {of
strip ,covieringsaid band, said strip beingwider :10 the-bag, the length gof?the :freely movable side
of. said V-shapedgprotective strip being :greater
than said‘band and extending at one edge
a
margin of. the-.mcuth, a removablesprotective
’ direction-awayifrom the bag. mouth and ‘at the
other edge tb'eing substantially ?ush with said
marijuana/cover tape covered on :One vside with
adhesiveiandtattached thereby to the other mar- 15
than its attached-side.
'
~
HAROLD
RUSSELL ‘C.
J. ‘DAVIS.’
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