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Патент USA US2409789

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> Get. Å22, 1946.
A. G.osBoRNE
2,409,788
I
METHOD FOR APPLYING CLOSURES TO CONTAINERS
Filed Oct. 21, 1942
2 Sheets-Sheet 2
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lNvENToR
Andrew 6 Osborne
,
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BY
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Patented Oct. 22,\_ 1946
2,4o9,1ss '
~ i, UNITED s'rATES PATENT OFFICE,
ME'rHoD Fort APPLYING cLosUnEs "ro
coN'rAINEas
Andrew G. OsbornejNew Kensington, Pa., as
of America,
signor to Aluminum Company'
\
Pittsburgh, Pa., a corporation of Pennsylvania
Application October 21, 1942; Serial No. 462,826
3 Claims. (Cl. 226,-87)
1
_ Thisinvention relates to a method for apply
ing closures to >containers and more particularly
to a method for reforming metal closure blanks
and the sealing liners thereof to threaded con
tainers, especially those of glass.
,
i ïn'closures for 'containern seals are made by
,
2
Fig. 3 is a view similar to Fig. l of a modified
form of closure;
' ~
Fig. 4 is a view of the closure of Fig. 3 after .
application, the closure and a portion of the con
tainer ?nish being shown in cross section;
Fig. 5 is a vertical cross section of the sealing
apparat-us showing a container neck and closure
.pressing a sealing material against one or more
in the sealing position; and
v
sealing surfaces on the container within the clo
Fig. 6 is a view showing the pressure block and
sure. compressible or plastically deformable seal
ing materials such as cork or soft rubber are, of 10 a containerneck without a closure thereon in the
course, desirable for this purpose but because
these materials are not always readily available
sealing position.
- According to my invention a seal is formed be
tween the closure liner and a plurality of sealing
surfaces on a container by placing a plain skirted
pressible sealing materials such as paper, pulp
board cr the like sometimes becomes a practical 15 metallic closure blank having a suitable liner on
the container and then reforming the edge of the
necessity. These relatively incompressible ma
liner and the section of the metal blank adjacent
terials must be pressed with considerable force
thereto around at least the top and side of the
into intimate contact with the sealing surfaces of
open end of the container ?nish by the applica
the container and there held by an unyielding
force to insure tight positive sealing. Further 20 tion of pressure to the top of the blank. When
the seal has ?geen formed in this manner and
more, with such materials, a greater area of con
orare relatively expensive, the use of less com
while the pressure is still being applied, the clo
sure -blank is secured to the container by spinning
threads in thejskirt to conform to the threads dis
fcr easily compressible sealing materials.
In machines belonging to the general class to 25 posed externally on the container finish. As em
ployed throughout the speci?cation and append
which the present apparatus relates, an occa
ed claims, container ?nish refers to the portions
sional breakage of the glass containers occurs
of the container embraced by a closure, and
during the sealing operation. This is principally
“sealing surface” refers to that portion of the
due to the contact of thread-forming elements
with the bare glass of the containers to Which 30 container ?nish contacted by the liner.
In practicing my invention, a cup-like blank
tact between the liner and the sealing surfaces
of the container is desirable-than that required
no closure blanks have been applied. Although
is provided com-prising a one-piece body having
much has been done. to alleviate this by improv
a closedend and a continuous unthreaded de
ing the cap delivery mechanism, absolute relia
pending skirt, the lower end of which is prefer
bility in performance of the delivery mechanism 35 ably ?nished with an annular wire edge or like
is generally unobtainable. It is, therefore, desir
construction to give reinforcement thereto. In
able to provide other means, preferably in asso
the skirt adjacent the closed end of the blank, an
ciation with the'sealing head, to minimize break
annular channel or bulge, the diameter of which
age of ccntainers in the aforementioned manner.
is somewhat larger than the diameter of the skirt;
. :It is an object of the present invention to pro
vide _.a method of reforming metallic closure
40 is provided to receive and hold a liner and to fur
nish su?icient metal for the formation of an an
blanks on containers to produce a seal on a plu
nular reinforcing rib during the sealing opera
rality of container sealing surfaces. It is another
tion. The liner which may be either adisc or 'a
object of the invention to provide a method of
ring is ?tted snugly into the channel and is some
producing a tight positive seal between the seal 45 what larger than the top of the container defin
ing surfaces of containers and closure liners of
ing the opening. The annular channel and the
paper, pulp board, news board and other similar
oversized liner ?tted therein are essential in the
materials Which are relatively inco-mpressible as
present method to the formation and to the re
compared With soft rubber, cork, etc. Further
tention of a seal on the side sealing surfaces of
objects and advantages Will be apparent from the
the container finish, particularly with the afore
following description.
mentioned relatively incompressible sealing ma
4In the accompanying drawings:
terials. During the sealing operation the liner in
T i Fig. l is a vertical cross sectional view of a
closure blank and pressure block, the container
on which the blank is to be reformed and a
the closure blank is reformed by drawing the edge
of the liner downwardly around the outside of
- the container mouth.
The incompressible mate
Fig.'2 is' a view similar to Fig. 1 showing the
rials, being relatively stift, tend to pull away from
the side of the container. To prevent any sub
closure after application with the pressure block'
and thread-forming roller still in contact with
stantial retraction of the liner from the side of
the container, an annular rib is formed in the
thread-forming roller being shown in elevation;
the closure;
60 closure near the lower edge of the liner during
azioavss
3
4
the reforming operation, to give lateral support
cally on the generally frustum shape cam sur
to the metal vof the closure retaining the liner in
face Zl, causing rollers 9 to engage the skirt of
the reformed position. As a result of this opera
the blank and to spin threads thereon corre
tion, the skirt is extended further down the con
sponding to the threads on the container ?nish.
tainer, preferably until the Wire edge of the skirtv v cl If during the operation a container is presented
is forced against a continuous bead on the con
v to the sealing head without a closure blank, the
tainer. When the closure is in this position,
same sequence of operation above described is
performed, but With the improved pressure
threads are spun in the skirt to correspond to the
block of the present invention the container slips
threads disposed on the container ?nish.
Referring now to the dra'wings, particularly 10 within the pressure block, as shown in Fig. 6. In
Fig. 1, a blank having a dome-shaped end I, de
this instance, rollers 29 do not proceed upwardly
pending skirt 2, wire edge 3, annular channel 4,
on cam surface 2l as far as when a container on
Which a blank has been placed is presented, and
and liner disc 5 inserted therein, is shown on
container 6 preparatory to the sealing operation
consequently rollers 9 do not contact the con
tainer.
with pressure block 'i and knock-out plunger 8
Throughout the speci?cation the description
Contacting the end I and channel 4 and with
thread-forming roller 5 in its non-Operating posi
of my invention has been principally directed to
tion. In the sealing operation, pressure block 'I
the formation of tight seals With closures hav
and container 6 are moved relative to one an
ing liners of pulp board and like materials.
other, creating a pressure on' the blank at chan 20 Reference to these materials, however, has been
nel 4 whereby the edge of liner 5 and the metal
only for the purpose of illustration and is in no
comprising'channel 4 are drawn downwardly over
way intended as a lim'itation on my invention,
other more compressible and elastic materials,
the side of the container t'o form a top and side
seal lo and! i, respectively, and annular rib [2,
such as cork and rubber, being entirely suitable
as 'shown in Fig. 2. It will be appreciated that 25 in vpracticing my invention.
the ?nal shape of rib 52 is determined by the con
. I claim:
tour 93 of pressure block I. During the relative
1. A method of sealing containers having an
movement of the pressure block and the con
externally threaded ?nish and a side sealing sur
tainer, a plurality of forming rollers 9, only one
face with a plain skirted metallic closure blank
of which is shown in the ?g'ures above referred 30 having an annular bulge formed between said
to, revolve bodily around the closure blank and
skirt and the closed end of said blank and having
advance toward skirt 2. When relative move
an Oversize liner disposed therein, comprising
ment of pressure block 1 and the container
pressing the overhanging margin of said liner
toward one another is nearly completed, the
into engagement with said side sealing surface
rollers contact the skirt and, as they revolve
by bending a portion of said blank in contact
around the skirt, form threaded indentations |4
with said margin downward past the container
therein, conforming to threads IB of the con
mouth, and siniultaneously therewith reforming
tainer ?nish. The closure as applied by the fore
said bulge into an annular rib adjacent the
going operation is shown in Fig 2 wherein pres
margin of said liner, and thereafter spinning
sure block 'E and thread-forming rollers 9 have 40 threads in said skirt to conform to the threads
not been retracted following the operation.
disposed on said container ?nish.
In Fig. 3 a closure blank is shown in position on
2. A method of sealing containers having an
a container preparatory to the sealing operation.
externally threaded ?nish and a side sealing
I-Iere, while the sealing operation performed is
surface with a plain skirted metallic closure blank
substantially the same as that embraced in Figs. 45 having an annular bulge formed between said
1 and 2, a blank is provided with a panel shown
skirt and the closed end of said blank and having
at lt. rIlhe principal advantages of this modi?ca
a flat oversize liner of non-resilent material dis
tion over the one shown in Figs 1 and 2 lie in
posed therein, comprising' pressing the over
the somewhat greater sealing surface contacted
hanging margin vof said liner into engagement
by the liner, and in the pressure created between 50 with said side sealing surface by bending a por
the liner and the corner of the mouth of the
tion of said blank in contact with said margin
container at ~ l'I as best shown in Fig. 4.
downward past the container mouth, and simul
taneously reforming said bulge into an annular
My sealing apparatus consists of hollow pres
rib adjacent the margin of said liner by the ap
sure block 'i and knock-out plunger 8 mounted
therein and yieldably supported by shaft l8. 55 plication of pressure to the top of said annular
bulge, and thereafter spinning threads in said
Pressure block 1, the internal diameter of which
skirt to conform to the threads disposed on said
at the forming end is somewhat larger than the
container finish.
outside diameter of the container ?nish, is
3. In a method of sealing containers having a.
machined to provide surface l3 for con
tacting and reforming a closure blank. 60 side sealing surface with a skirted metallic
closure blank having an annular bulge formed
Plunger 8 is urged downwardly by spring |9 to
between said skirt and the closed end of said
provide sufficient pressure to hold a closure blank
on a container as it enters the sealing mechanism
blank, and having. an oversize liner disposed
and to eject a closure after it has been applied
therein, the steps comprising pressing the over
to a container.
65 hanging margin of said liner into engagement
In Fig. 5, my sealing apparatus is shown
with said side sealing surface by bending a por
mounted in the general type of sealing mechan
tion of said blank in contact with said margin
ism disclosed by United States Patent 1,674,266
downward past the container mouth, and simul
to J. E. Sharp. In the operation of this
taneously therewith reforming said bulge into an
mechanism,_when a container is presented to 70 annular rib adjacent to the margin of said liner.
the sealing position, pressure block 'I engages the
top of the blank and cam rollers 2D travel verti
ANDRE'W G. OSBORNE.
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