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Патент USA US2409790

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Oct. Z2,v 1946.
_
v
A. G. OSBORNE’ ‘
2,409,789
METHOD OF ‘SEALING CONTAINERS
Filed Sept. 21, 1945
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Patented Oct’. 22, , 1946
2,409,789 *
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"PATENT o
‘ 2,409,789-
‘
L~Mir]?i161) i6F‘sEALnITG ‘ooiw‘r'AiN'nRs
‘Andrew'
Osborne,“ NewKensington, WPaU ‘as
: Sig I101‘ _. .to ‘Aluminum
(309111391X, - 9f. r America,
. ‘Pittsburgh, Pa., a corporation of Pennsylvania
"iAiiiiiiéandfséptéiilbér 21, E43,‘ ‘serial 'No.‘ “503,185
a '6 oiaiiiis. murals)
{This invention i‘e'latesrtdthe‘*sealing of con
tainers'and more‘particularlyto"a method of
aiiplyingjcicsuijes'w containers.
'
‘tion ‘ of ' the ‘aforementioned "top‘ and side 'seal ‘in
combination with a‘nymethod involving'the ap
plica‘tion "of ' direct downward'pres‘sure to ‘the top
of “the‘ closure without subjecting the’ closure ' to
'
Inf‘closures" for" containers, “the sealing ‘ "action
is accomplished "by pressing'ithe “ ‘s‘ealingfriiaterial
any" turning or“ ‘screwingunovement.
‘
against" one or'inore sealing surfaces of the“ con
“ ‘It is'an'object of the present ‘invention to‘ pro
tainer ?nish within the closure. "Co'r'n'p‘res‘sible or
practicallydeformable materials, enemas coil; or
.Vide' amethodi'ofj forming'a hermetic 'sealrbetwe‘en
the‘. container ?nish “andplosure “liners'of paper,
soft‘ riibberf'are‘of' cdursev‘de'sirable for thispur
pulpboard, and ‘ other ‘similar ‘incompressible
"pose, but because _"thése"mate‘rials ‘are not ‘always
readily available‘ or‘ are relatively expensive,‘ the
'm‘a‘teri'a'ls. ‘Anbther object “of the‘ 'p'resent’inven
'tion ‘is‘to' provide ‘themeth’od ‘of applying closures
‘use"ofeheaper"and less compressible‘rnaterials,
siich aspaperypulpboard, or‘the like, becomes a
'pra ti’cal necessity. "These, relatively incompress
‘ible, materials must be ‘held by"an‘unyielding force
in ‘intimate " contact with‘ ' the : sealing surface‘ of
the container "to' insure ‘tight, positive'sealing.
When‘ the pressurefholding ‘the liners of ‘these
materials inl's‘e'aling' engagement is renev‘ed; ‘these
liners‘,"becaus'e'ftlieir slightcompr'es'sibility ‘is ‘per
manent; lose their sealingfe?iciency; therefore,
to‘ containers wherein ‘the’ liner is reformed‘ 'to" a
“plurality of "sealing ‘surfaces ‘on ‘the"container
?nish. ‘Another object‘ is‘to' provide "a ‘method
15 ‘of "applying “ ‘closures to' 'cont'ainers vwherein "'a
‘closure’ liner “ ‘of "incompressible “material is ‘ "re
'formedinto' ‘andv retained in" sealing engagement
with ‘the’ top‘ and'sides of the "contaiher‘?nish.
Further ' objects and‘ advantages will be’ apparent
20 from ‘the folldwing'de‘scriptien of‘my method ‘and
of v"the specific" embodiment thereof.
in‘ the "?se 'bf these"materials as linersp every
'éff‘o'rt'is made‘ ,td‘pre‘ifent any" diminution of the
~pressurel'idlding ‘the liners in sealing‘ engage
Y
In the" accompanying drawing:
‘ Fig.‘ 1" is‘anjjeIeva‘tiQn of‘ a‘ ‘closureeblahk‘ and a
'c'o'ntainer'tq which the‘bla‘nl; is"to"be‘applied, a
"rn'ent, ‘This; prbbvlemtis' not particularly "serious
in "connection "withkcrew’ftype ‘closures because
25 portion ‘of the‘ blank being ‘shown in’ section, and
‘the 'pres‘s'ureds; progressively ‘ increased‘ in the
ing" ‘relationship ‘ ‘being "shown ‘in' " positibn' ‘above
‘a' pressure‘ block‘ for forcing“ the ‘ closure into?‘ seal- 1
‘sealing operation‘ by‘ screwing the closure onto
the container, and consequently there is hoop
"the blank;
Fig: is‘ adaptation-qr acidntainienand‘a' par
pdrtunity vfor spring‘ back. ‘However, ' considera 30 ‘tiallsection‘of a‘closure' after 'the blank ‘of Fig; 1
ble 'di?icultyis'sometimes ‘encountered in’ the use
of "these runway;ingempressiue ‘materials ‘in
closuresof‘the'shaplentype or in closurestse
" Fig. 3‘ is" a ‘sectional elevation “of “a modi?cation
of 'the‘closure blank shownin Figs.‘ f1‘ and 2;_
‘cured to'the'" container‘ by‘the reformation of ' the
'clos'u‘reskirt‘ in whichthe securing means’may
yield j‘sliglitlylwhenf‘the"pressure of 'the sealing
‘apparatus ‘is removed. ,
For convenience of description, sealing mate
’ Figs" 4 “ is ‘ an“ elevation of‘ a“ container’ rand {the
35
closure of the blank in Fig. _3 showing the closure
in ‘sealing relationship with'the ' container; a por
tion of the closure "and vcontainer 'being shown
in.“cross"section; and
‘
‘
“rials. such‘as paper, cardboard, pulpboardn and ,
Fig'.‘ 5‘is a plan 'view'of the closure blank shown
the'like'may hereinafter be referred to as incom 40 ‘in rigsisiand 4.
pressiblé‘rnaterials even thoug'h'they are slightly
‘ According to‘ my invention," a ‘hermetic "seal ‘is
but 'perm'anently ‘compressible. As ‘employed
produced “between” the container‘ sealing ' ‘surface
throughout this speci?cation ' and appended
‘and a liner of incompressible sealing material
claims, “container ?nish” refers to‘ the‘ portion
by reforming‘ the marginal‘ area “of the‘ liner into
of‘the container embraced by the closure, and 45 intimate‘ contact" with ‘the 'top'f and“sides of ‘the
“sealing surface” refers to'that‘ portion'of the
“container ?nish‘by the ‘ application" of direct
container'?nish contacted by the liner.
downward‘ pressurev and there ‘ retaining ‘the liner
‘The present‘ invention contemplates the forma
by" superposing‘ a portion of ‘the skirt on [the ‘re
Tormed‘marginal ‘area of the liner. *This‘p'ortion
tion of a top and side seal between the container
?nish‘ and a liner'of incompressible "material 50 of the skirt, and consequently the marginal area
wherein the liner is reformed around the outside
‘of the‘ liner, are‘ held, securely in" sealing'relation
of the container mouth, thereby producing a
ship to‘the' ‘container by- a'suitable “closure'secur
‘hermetic seal within broad lifnitsiiof ‘tolerance
ing means disposed‘on the lower portion ‘'ofthe
for? any particular-I glass‘ container i?nish, ” The
closure‘rskirt.‘ In practicing‘the present invention,
present invention also contemplates the forma 55 the applicant employs a closure blank consisting
2,409,789
3
of a top portion which, is preferably ?at or only
slightly convex, a depending skirt, an annular
shoulder or annular bulge de?ning a channel
opening inwardly in the skirt in spaced relation
ship to the top portion, and a liner disc or ring
seated in the channel or against the annular
shoulder and there preferably held by some suit
able skirt construction. Before the blank is ap
4
.
shown in the Sharp patent does not change the
mode of operation of that apparatus. With the
snap-on type closure, the pressure block may
perform the entire operation of pressing the liner
into sealing relationship and securing the closure
to the container or it may operate in cooperation
with a member which forms the lugs in the clo
sure skirt during the sealing operation.
In the sealing operation, container 6, with the
plied to the container, the liner is a ?at disc or
ring of a diameter somewhat larger than the
closure blank in position over the mouth thereof
outside diameter of the sealing surface of the
container ?nish to provide sufficient material to
as shown in Fig. l, and pressure block B, which
is designed to conform to the contour of the pre
form a side seal as well as a top seal and to allow
formed upper portion of the blank engaged
thereby, are moved relative to one another. The
su?icient marginal area for meeting the maxi
mum limits of tolerance in the container ?nish. 15 pressure applied to top I and annular bulge 4
causes the upper wall of the channel constitut
During the sealing operation the aforemen
ing a shoulder 1 to bear against the margin 8 of
tioned blank is placed loosely over a container
liner 5 and to reform the margin around the out
mouth, and the two are then moved relative to
side of the container ?nish. The constricted
a sealing head having a pressure block the con
tact end of which has substantially the same con 20 portion 9 of the skirt slips over the reformed
margin, further pressing the liner against the
tour as the upper portion of the blank. When
side of the container ?nish and drawing the flat
the loosely applied blank and the pressure block
portion of the liner into intimate contact with
are brought into engagement, sufficient pressure
the top sealing surface. The constricted portion‘
is applied axially to the blank to cause the shoul
9 restrains the margin 8 of the liner in the de
der or upper wall of the channel of the blank to
formed shape and retains it against the sides of
reform the marginal area of the liner down
the container ?nish until the closure is removed
wardly around the sides of the container ?nish.
from the container.~
This operation also draws or presses the liner
As shown in Fig. 2, after the liner has been
into intimate contact with the top sealing surface
deformed around the outside of the container
of the container ?nish. As the liner is drawn
mouth and the constricted portion 9 of the skirt
around the sides of the container by the shoulder
has been-pressed over the deformed margin of
or bulge, a portion of the skirt above the shoulder
the liner in the foregoing manner, the closure is
or bulge slips over the deformed liner and se
secured into sealing relationship with the con
curely retains the margin thereof in intimate
tainer by reforming the lower portion of the skirt
contact with the sides of the container ?nish.
to the threaded con?guration of the container
The portion of the skirt above the shoulder or
?nish or to the annular bead on the container.
bulge is of a diameter small enough in relation
The construction in which the skirt is reformed
to the total diameter of the container ?nish and
to an annular bead is not shown in the drawing;
double thickness of the deformed marginal area
of the liner to press and hold this marginal area 40 however, it will be appreciated that the present
method and blank are readily adaptable to such
against the side sealing surface. When the fore
construction. As shown in Fig. 4, wherein the
going operation has been completed, the closure
numerals correspond to those of Figs. 1 and 2, the
is secured to the container by any satisfactory
lugs ll) of the closure have been forced beneath
means, as for example, by reforming the lower
portion of the skirt to a threaded con?guration 45 the bead l I of the container. This operation was
accomplished during the deformation of the liner
0n the container. The closure may be secured to
from the shape shown in Fig. 3 to that of Fig. 4.
the container by the lug and bead arrangement
In this modi?cation the liner is retained in the
of a snap-on type closure. In this type of closure
closure before application thereof by the lugs, as
the lugs and bead come into engagement during
the liner deformation step. During the opera 50 shown in Fig. 5.
By varying the diameter within the constricted
tion in which the liner is being deformed around
portion, the pressure exerted thereby can be
the outside of the container mouth any turning
made greatest at the point or points of greatest
or screwing movement of the blank is to be
importance, Consequently the pressure against
avoided since such movement at that time tends
to displace the liner and produce a defective seal. 55 the constricted portion on the margin of the
liner, particularly at a point near the lower edge
Referring now to the drawing, wherein two
thereof, can be increased somewhat by reducing
embodiments of my invention are illustrated, the
the diameter of the constricted portion adjacent
blank of Fig. 1 consisting of a flat top I, plain
the annular shoulder or bulge as shown in Fig. 3.
skirt 2, bead 3 for reinforcing the lower margin
Throughout the speci?cation the description of
thereof, an annular bulge 4, and a flat liner 5 60
my invention has been principally directed to the
seated in the channel de?ned by the bulge, is
formation of hermetic seals with closures hav
shown resting on the mouth of container 6 pre
ing liners of pulpboard and similar relatively in
paratory to being pressed into sealing relation
compressible materials. Reference to these ma
ship by pressure block B, shown in position over
the blank. Before the blank is pressed into seal 65 terials has been made primarily because the in
ing relationship with the container, the oversize
liner 5 rests snugly in the channel within annular
vention is particularly adapted to the formation
of hermetic seals with these materials but this
bulge 4 of skirt 2 and is thereby prevented from
speci?c reference is in no way intended as a limi
becoming dislodged from, or displaced in, the
tation on my invention, more easily compressible
blank before the application of the blank to the 70 or plastic deformable materials such as cork and
rubber being entirely suitable in practicing my
container.
The pressure block B may form an element in
invention.
'
'
a bottle capping apparatus such as that dis
I claim:
1. In the art of sealing containers having a side
closed in U. S. Patent 1,674,266 to Sharp. The
substitution of my pressure block for the one 76 sealing surface with a blank having a top portion,
2,409,789
J
6
a depending skirt, an inwardly extending annular
shoulder in said skirt in spaced relation to said
top portion, and a liner of greater diameter than
margin in sealing engagement with the container
?nish, and securing the closure to the container
by reforming the skirt below said shoulder to the
the outside diameter of the mouth of the con
tainer to be sealed disposed within said skirt be
contour of the container ?nish.
low said shoulder, the steps comprising placing
side sealing surface with a blank having a top
portion, a depending skirt, an inwardly disposed
annular channel in said skirt in spaced relation
to said top portion, and a liner disposed in said
channel, the steps comprising placing said blank
said blank over the mouth of said container, ap
plying a pressure means to said blank axially of
the container reforming the margin of said liner
around the upper part of the container ?nish and
into sealing engagement with said side sealing
surface independently of pressure of said top por- '
tion against said liner by pressing said shoulder
by direct downward pressure against said margin
at least until the shoulder passes below the con
tainer mouth.
>
'
4. In the art of sealing containers having a
over the mouth of the container to be sealed,
applying a pressure means to said blank axially
of the container reforming the margin of said
liner around the top of the container ?nish and
into sealing engagement with said side sealing
surface independently of pressure of said top por
tion against said liner by pressing a wall of said
channel by direct downward pressure against the
margin at least until the channel passes below
'
2. In the art of sealing containers having a side
sealing surface with a blank having a top por
tion, a depending skirt, an'inwardly extending
annular shoulder in said skirt in spaced relation 20 the container mouth.
‘
to said top portion, an annular constricted por
5. In the art of sealing containers having a
tion between said shoulder and said top portion,
side sealing surface with a blank having a top
and a liner of greater diameter than the outside
portion, a depending skirt, an inwardly disposed
diameter of the mouth of the container to be
annular channel in said skirt in spaced relation
sealed disposed within the skirt below said shoul
to said top portion, an annular constricted por
der, the steps comprising placing said blank over
tion between said channel and said top portion,
the mouth of said container, applying a, pressure
and a liner disposed with its edge resting in said
means to said blank axially of the container re
channel, the steps comprising applying a pressure
forming the margin of said liner around the top
means axially to said blank reforming the margin
of the container finish and into sealing engage 30 of said liner around the top of the ?nish of the
ment with said side sealing surface independent
container to be sealed and into sealing engage
ly of pressure of said top portion, against said
ment with said side sealing surface independent~
liner by pressing said shoulder by direct down
ly of pressure of said top portion against said liner
ward pressure against said margin at least until
by pressing the upper wall of said channel by di
the shoulder passes below the container mouth, 35 rect downward pressure against the margin at
slipping said constricted portion over the de
least until the channel passes below the container
formed margin to laterally press and retain said
mouth and reforming the lower portion of the
margin in sealing engagement with the container
skirt to the container ?nish.
?nish, and securing the closure to the container. ‘
6. In the art of sealing containers having a side
3. In the art of sealing containers having a side 40 sealing surface with a blank having a top portion,
sealing surface with a blank having a top por
a depending skirt, an inwardly extending annular
tion, a depending skirt, an inwardly extending
annular shoulder in said skirt in spaced relation
to said top portion, an annular constricted por
tion between said shoulder and said top portion,
and a liner of greater diameter than the outside
45
shoulder in said skirt and a liner of greater di
ameter than the outside diameter of the mouth
of the container to be sealed disposed within the
skirt below ‘said shoulder, said shoulder being‘
spaced below said top portion a distance greater
than
the distance between the top of the con~
sealed disposed within the skirt below said shoul
tainer ?nish and said top portion at the com
der, the steps comprising placing said blank over
of the sealing of the container, the steps
the mouth of said container, applying a pressure 50 pletion
comprising applying a pressure means to said
means to said blank axially of the container re
blank axially of the container bending the margin
forming the margin of said liner around the top
of the liner into sealing engagement with said
of the container ?nish and into sealing engage
side sealing surface by pressing said shoulder
ment with said side sealing surface independent- '
against
said margin, and thereafter pressing said
ly of pressure of said top portion against said
top portion against said liner while retaining said
liner by pressing said shoulder by direct down
margin in sealing engagement with said side
ward pressure against said margin at least until
sealing surface by means of a portion of said
the shoulder passes below the container mouth,
skirt intermediate said shoulder and said top por
slipping said constricted portion over the de
tion.
formed margin to laterally press and retain said 60
‘ diameter of the mouth of the container to be
ANDREW G. OSBORNE.
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