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Патент USA US3019942

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Feb. 6, _1962
3,019,933
J. u. GOULD ETAL
SNAP-0N CAPS AND PACKAGES INCORPORATING THE SAME
Filed Aug. 6, 1958
/02/7
)///
,6
FIG. /
INVENTORS
J46‘! 4/- aouzp
1£0M429 M. Gar/VIM
1779277576
ice 4
_
asiaass
Patented Feb. 6, 1962
2
container, and thereby avoids the di?iculties inherent
3,019,933
SNAP=<ON (IAPS AND PACKAGES
IN€ORFORATIPJG THE SAME
Jack U. Gould, Brooklyn, and Leonard M. Gutmanu,
Babylon, N.Y., assignors to Ferdinand Gutrnann &
Co., Brooklyn, N.Y., a corporation of New York
Fiied Aug. 6, 1953, Ser. No. 753,556
4 Qlaims, {Cl. 215-41)
,
in snap-on caps of the type that has a protruding removal
tab, since the latter necessitates careful positioning in
feed of the caps for mechanical capping of bottles or
like containers ‘and must also be accurately positioned
in introducing the packages into a shipping container.
it is a feature of the invention that the snap-on bottle
cap which may be of polyethylene, vinyl plastic or simi
lar ‘elastic, preferably transparent plastic, be relatively
Our present invention is concerned with a package 10 thick and therefore comparatively stiff in character along
a substantial peripheral area near the junction between
comprising a relatively rigid container such as‘ a bottle,
the top disk and the skirt of the snap-on cap; that is
vial, jar or tumbler in combination with a snap-on cap
for effective seal thereon, and with said snap-on cap as
an article of manufacture.
As conducive to a clear understanding of the inven
tion, it isnoted that where the snap-on cap depends for
its hold upon the container, essentially upon the pe~>
thick upper, and the materially thinner lower skirt por
tion, affords a purchase for removal by'the user of the
ripheral grip of its skirt about the bead of the bottle, the
seal is substantially solely at the periphery of the bead
rather than against the rim of the bottle, which explains
The thin ‘lower portion of the snap-on cap preferably
has a lower rim extending'radially inward, which be
Why the use of plastic snap-on caps has heretofore been
impractical for containers with liquid content, since
along the rim area of the top disk and at the upper area
of the skirt of the snap-on cap. A relatively wide and
stiff peripheral shoulder at the ‘junction ‘between the
snap-on cap from the package.
9 '
comes stressed in'applying the snap-on cap to the bottle,
resiliently to embrace a downwardly and inwardly
than near the inner edge and this also is objectionable
with the use of a tamper-proof inner seal film, because
sloping lower portion of the bottle bead. The lower
rim of the skirt becomes stressed effectively throughout
the entire range of dimensional tolerances of the bottle
but affords a substantial component of downward force
by a relatively steep angle of engagement with the bottle,
to transmit thrust through the thick relatively stiff por
tion of the cap for an effective top seal against the
bottle rim which is usefulnot only for packages of
tablets and powder, but for'liquid product as well.
Another feature is resort to a bottle ?nish, (a) with
an- outward and downward slope from its highest por
tion which is near the bore of the bottle neck, and (b)
35 with a bead having its lower portion sloping downward
Yan'd inward, preferably concavely, at an angle to the
vertical which is much greater than that of the conven
tional lock shoulder, so that in applying the snap-on
cap, its lower rim will be stretched in passing over the
40 bead of the bottle and in its partial elastic return, will
resiliently react against the sloping bead portion for a
resilient grip thereabout, adapted to the range of di
container, effectively to seal and reeseal, not only dry,
?lm against the bottle rim, and (b) by the seal of such
liquid would exude from between the bottle rim and the
cap and either-escape to the exterior or at best accumu
late against the bottle bead-engaging skirt of the cap.’
In the absence of effective top seal of the snap-on
cap with respect to the rim of the bottle or like con
tainer, the use of a tamper-proof inner seal has also
heretofore been impractical; for the convenient and prac
tical application of atamper-proof inner seal, requires
adequate top pressure of the snap-on bottle cap against
the bottle rim, so that the inner seal may become adhe
sively bonded to the bottle rim and'this, as We have seen,
can be accomplished in a practical 'way only by top seal
of the snap-on cap to the bottle rim. Moreover, the
application of a snap-on bottle cap of the-type which
depends for its hold essentially only upon a peripheral
skirt, resiliently to grip the conventional bottle,_resi1lts
in engagement if at all, of the disk top of the snap-on
cap at or near the outer edge'of the bottle rim rather
the liquid carrier of the adhesive would be blocked from t mensional tolerances of the bottle, which sloping head
portion affords a substantial vertical downward thrust
escape to the exterior, but rather would be directed to—
component, fo'r‘adequate pressure against the bottle rim 45
ward the‘ contents of the bottle, which would be especially
near the bore of the bottle neck, for utility even with
objectionable for liquidcompositions that must ge guard
a package for liquids. '
I
,
.
ed from impurities or such as are of hygroscopic char
Another feature'is to render effective in a combina
acter and must be isolated from evensmall proportions
tion of the above type an inner safety seal ?lm of the
of vapor of water or other solvent.
7
type which may be frictionally retained in the snap-0n
It is accordingly among the objects of the invention
bottle cap before its application to the bottle, the seal
to provide a package of the above type in which the
of which is rendered effective (a) by the substantial
container and the associated snap-on cap are conformed,
vertical component of pressure resiliently exerted by the
inherently to afford sufficient top pressure of the snap
snap-on cap for securely pressing the inner‘ safety seal
on cap with respect to the rim of the rigid bottle or other
but liquid product as well, and to afford suflicient pe
inner safety seal to the bottle rim near the bore diameter
ripheral resilience at the skirt of the snap-on cap to ac
thereof, so. that (c) the volatile carrier of the adhesive
e?ective seal to the bottle rim, wherein inherent facilities
are ‘afforded for ready evaporation of the liquid carrier
cap, preferably through spaced venting scallops in the
prompt'and adequate bonding of the seal to the bottle
In the accompanying drawings in which are shown one
or more of various possible embodiments of the several
> that "bonds the safety seal to the bottle rim is afforded
commodate the dimensional tolerances, of the bottle neck.
an escape to the outside of the bottle through the out
Another object is to provide a tamper-proof‘ inner
ward and downward slope from the highest portion of
60.
seal in a package conforming to the above objects, which
the bottle rim which is near the bore of the bottle neck,
becomes adequately pressed against at least one sub-V
and (d) such volatile carrier escapes through one or
stantially annular region of the bottle rim for thoroughly
more vents in the lower portion of the snap-on bottle
of the adhesive for the tamper-proof inner seal to assure 65 thinned inturned lower rim of the bottle cap.
‘
rim, without entry into the contents of the package of .'
features of the invention,
_
objectionable amounts of the vapor of such carrier.
FIG. 1\is a dropped sectional view of one embodi
Another object is to provide a1 snap-on cap of the
above ftype, which affords a continuous symmetrical 70 ment of the bottle ?nish and of a preferred embodiment
of snap-on cap to seal the same, the section of said cap
hand-pressure sustaining arrangement unitary therewith,
being taken on line 1-—1 of FIG. 2,
'
.
_
-.
for removal or" the snap-on cap from the bottle or other
3,019,933
35
4%
FIG. 2 is a bottom plan view of the snap-0n bottle
?lm 25, itself of conventional construction. The snap
cap,
on cap, which desirably has a small downward and in
FIG. 3 is a cross-sectional view showing the assembly
with a safety inner seal ?lm interposed between the
bottle rim and the top disk of the snap-on cap in place
ward taper 26 at the inner face of the skirt, that may
be in the order of 3 degrees, serves to check curling of
thereon, and
,
FIG. 4 is a view similar to FIG. 3 showing the co
relation of the bottle ?nish and snap-on cap assembled
thereon without an interposed safety inner seal.
.Referring now to the drawings, the snap-on cap is
of relatively elastic plastic, preferably polyethylene, though
other plastics such as vinyl plastic may be used, which,
for various purposes and especially for the embodiment
shown in FIG. 3, may be of transparent plasti L
,
The snap-on cap is generally referred to hereinafter as
the ?lm when loosely placed in the snap-on cap while
in stock and before its application to the bottle. An
adhesive ?lm 27 desirably moistened with water or other
suitable solvent is preferably applied to the upper por
tion of the rim of the bottle to effect the seal by pressure
of the'cap against said rim.
in order to assure ready escape of the vapors from
the solvent for the adhesive that serves to bond the in
ner safety seal to the bottle rim, one or more vents are
provided in the thin lower portion of the snap-on cap.
Preferably the inturned rim 15 of the thinned skirt por
a snap-on bottle cap, the term bottle embracing within
its scope a vial, a jar, a tumbler or similar container of
tion of the snap-on bottle cap is conformed with ya mul
near the junction of the disk and skirt.
preferred construction of bottle ?nishabove described
and shown in the drawings. In this operation, the clas
tic snap-on cap will be spread by engagement of the
desirably rounded edge 31 of its lower gripping rim with
the bead 22 of the bottle, and will resiliently embrace
the lower, desirably concave, tapered portion 23 of the
tiplicity, such as twelve desirably equidistant scallops 30
glass or other substantially rigid material.
which permit escape to the outside, of the vapor of the
The snap-on bottle cap has the top disk or wall it}
solvent from the adhesive ?xing the inner safety seal 25.
with the peripheral dependent skirt 11 unitary therewith. 20. To seal the bottle, the snap-on cap, desirably with its
That snap-on cap is of thick plastic stock at the area
safety seal loosely retained therein, is snapped over the
More particu
larly, at least the peripheral annulus 12 of the top disk
adjacent the skirt 11 and the upper portion 13 of the
skirt 11 adjacent the periphery of the disk are of such
thick plastic stock.
The thickness of the portions 12 and 13 is such as to
render the width of the snap~on cap {along the junction
between its end disk and its skirt substantially rigid.
The skirt portion beyond or below the thick skirt portion
13 is of greatly reduced thickness as at 14, the lowermost
extremity of that skirt portion being desirably rounded
. head as the snap-on cap is pushed down as far as it will
go, that is, until the safety inner-seal ?lm 25, engages
the higher portion near the neck bore of the downwardly
and outwardly sloping bottle rim. The force resiliently
exerted by the gripping rim portion 15 against the bot
tle ?nish is normal thereto and that normal force is
The. snap-on cap presents a thick peripheral shoulder
resolved into two components, one a radially», inward
18 at the junction between the thick upper skirt portion 35 component A which maintains the gripping rim in en
as at 14'. '
13 and the relatively thin lower skirt portion 14.
Extending inward from the lower end of the skirt
is a peripheral rim 15 which is of thickness as little or
if desired, less than that of the skirt portion 14 for en- _
hanced ?exibility.
Desirably, the circular central area 16 of the top disk
of the cap is much thinner than the annular rim 12, a
rounded peripheral shoulder 17 de?ning the excess thick
gagement with the bottle between the limits of dimen
sional tolerances thereof, and a second substantially verti
cal component B, by which the top disk of the snap-on
cap is caused to exert substantial pressure against the
bottle rim for effectiveness of adhesion of the inner seal
film with respect to the bottle rim.
In the ideal case, the vertical component of the resilient
force transmitted by the stressed cap engaging the bot
ness of the rim.
tle at 31 is a maximum, but within the tolerances of
Desirably the outer face of the thick rim 12 of the
dimensions of the bottle neck, that angle will always be
45
snap-on cap has ‘a plurality of ‘equidistant radial slots
materially greater than that afforded by the lock shoulder
or grooves 19 which may continue as corresponding slots
of conventional bottles.
along the thick skirt portion 13, down to the upper edge
of shoulder 18.
For ornamental eifect and to avoid
possible injury to the user in pushing with his ?ngers
against shoulder 18 for removal of the snap-on cap, the
In the application of the snap-on cap, in the embodi
merit shown, there is little or no ?exure'at the thick annu
lar portions 12 and 13 of the cap, but there are three
regions of ?exure, one at theshoulder 17 of the top disk,
slots 19 taper in depth along the skirt, so as not to inter
one at the inturned gripping rim 15 and one at the lower
rupt the upper edge of shoulder 18.
rim of the shoulder 13 between the thick portion 13 ‘and
the thin‘ portion 14 of the skirt 11. These three regions
While the snap-0n cap, \as set forth, may be used in
lieu of conventional snap-on bottle caps upon conven
tional'bottles, the desired fully effective top seal of hot
'tle attained by the construction of snap-on cap of the
present invention is accomplished by the use of a' special
glass ?nish, as shown in FIG. 1. Here, the bottle rim
2?} slopes downwardly and outwardly substantially, as
of ?exure permit the-ready adaptation of the "snap-on
cap in the course of application, for the desired interfer
ence ?t and do so throughout the range of dimensional
shown, from the usual chamfer 2'1 at the inner rim of
the bore of the bottle‘ neck to form the rounded bead
tolerances of the bottle. It is the relatively stiff thick
portions 12 and 13' of the snap-on cap that transmit the
resilient thrust exerted between the gripping rim 15 of
the cap and the bottle neck portion 23 for effective pres
sure of the inner seal ?lm 25 against the bottle rim at the
22, that head tapering off in an inward and downward, _
upper portion thereof near the bore of the bottle neck.
preferably concave slope 23 from the maximum bead
diameter, which slope affords an interference ?t with
respect to the gripping rim 15 of the snap-on cap. That
By the arrangement shown, it will be seen that the
solvent carrier (whether water or other suitable solvent)
will readily evaporate into the widened space between
slope, desirably has a maximum angle to the vertical,
the outwardly sloping bottle rim and the snap-‘on cap
at the lower end of the convex curve b immediately
and thence escape through the vents or ports afforded
below the maximum bead diameter region a, which
by the scallops 30 in the skirt rim of the cap. In the ab
maximum angle is greater than the usual lock shoulder 70 sence of such facilities for escape for the carrier of the
tangle of bottles designed to accommodate snap-on caps.
adhesive between the inner seal and the bottle, the drying
Speci?cally, an angle of that slope in the neighborhood
would be extremely slow ‘and ‘the ?lm would not e?ec
of 54° has been found desirable.
V
tively adhere to the bottle rim and its tamper-proof pur
In a desirablev embodiment as shown in FIG. 3, the
pose would be defeated, were the bottle surreptitiously
snap-on cap is provided with a tamper-proof inner seal 75 opened, say in a self-service store, but replaced on the
3,019,933
5
shelf of the store for subsequent sale. Moreover, the
arrangement set forth, affords the most ready escape for
the vapor of the carrier liquid to the exterior and thus
protects the contents of the bottle from access of such
vapor which might be highly objectionable, especially for
preparations of hygroscopic or other critical character
istics.
- ‘I
The snap-on cap, as noted, is devoid of the pull tab con
vent-ionally used for its removal. The stiff peripheral
shoulder 18 at the junction between the upper and the
lower skirt portions 13 and 14 affords an excellent ?nger
abutment over its entire periphery for forcing the snap
on cap off the bottle when access is desired.
In this op
6
as new and desire to secure by 'Letters Patent of the
United States is:
p 1. A package including a relatively rigid container
comprising a neck having a rim, of which the area close
to and peripherally of the neck bore is higher than any
other portion of the rim, and a peripheral outer bead
continuous with said rim, the lowermost portion of said
bead having a slope extending downwardly and inwardly
at least far enough to be engaged by a snap-on cap for
said package; in combination with a snap-on cap, includ
ing a top disk, and a skirt unitary therewith and depend
ing therefrom, of resilient plastic, the junction between top
disk and skirt of said cap comprising a thick relatively
eration, the gripping rim 15 stretches outwardly especial
rigid portion extending peripherally along the top disk
22 and despite the relative thickness and rigidity of the
rim portion 12 of the top disk and the upper portion 13
of the skirt, there is sufficient ?exure at the junction be
tween the thin and the thick portions 14 and 13 respec
tively of the skirt, at the inturned rim 15 of the skirt, and 20
tending peripherally of the upper part of the skirt, the
skirt having an inwardly extending lower rim portion
thickened circumferentially, embracing and tangential to
the downwardly and inwardly sloping lower portion of
the bead, the skirt portion above the inwardly extending
thickened lower rim being of substantially uniform inner
diameter greater than that of the container neck embraced
thereby, for clearance with respect thereto and to provide
ly at its scallops 30, in being drawn over the bottle head 15 and a thick relatively rigid portion integral therewith, ex
at the rim- near shoulder 17 of the thin portion 16 of the
top disk and some ?exure in the thick portions 12, 13 of
the cap due to the radial slots or grooves 19 to permit
a space and having a portion reduced in thickness relative
the cap to be drawn readily over the bead for removal.
The snap-on cap, especially in combination with the 25 to that of the junction to afford the ?exibility to permit
the thickened lower rim of the skirt to be snapped in place
bottle ?nish disclosed, affords the desired top seal and
under the bead under cap-applying pressure; the top
extends the utility of snap-on caps to bottles, not only for
disk of the snap-on cap having the central portion thereof
corresponding substantially to the bore of the container,
While the invention has outstanding utility in the com 30 of thickness materially less than that of the rim portion of
the top disk that is adjacent the junction thereof with
bination including the safety seal ?lm 25, it is also appli
the skirt, whereby the vertical component of pressure
cable with substantial advantages in the relation shown
exerted tangentially of the lower portion of the bead
in FIG. 4 in which the safety seal is absent. In this
against the inwardly extending rim portion of the skirt will
embodiment also, there is an effective top seal, directly
between the elevated portion of the bottle rim near the 35 exert maximum leverage transmitted through the relatively
stiff junction of the cap for effective seating of- the cap
bore of the bottle neck, and the inner face of the top
solid or powdered material, but for liquid preparations
as well, as above set forth.
against the most elevated area of the container rim close
to the bore of the neck, said snap-on cap having means
unitary therewith to facilitate its removal from the con
bodiment could be fashioned without the vapor venting
scallops 30, although these scallops are desirable for the 40 tainer.
2. The package recited in claim 1 in which a tamper
added ?exibility they afford at the gripping rim. Even
disk of the snap-on cap. Since there is no vapor of ad
hesive carrier to be vented, the snap-on cap in that em
without the vsafety seal, the combination of bottle and
proof inner seal is interposed between the container rim
and the snap-on cap with an adhesive bond with respect
to the container rim at that portion near the bore of the
45 bottle neck which is at highest level.
products as well.
3. A package including a relatively rigid container com
Where the inner seal is used as in the embodiment of
prising a neck having a rim, all of that area of which,
FIG. 3, it is desirable to expose to view through the
that encompasses that area of the rim close to and periph
closed package, advertising or directional information
erally of the neck bore being at level lower than, said
that may be imprinted upon the upper face of the tamper
proof safety seal 25. By the use of polyethylene, vinyl 50 latter rim area, and a peripheral outer bead continuous
snap-on cap shown in FIG. 4 affords an adequate seal
not only for solid or powdered products, but for liquid
plastic or equivalent transparent materials, the thinned
central portion 16 of the cap is suf?ciently transparent
with said rim, the lowermost portion of said bead having
a slope extending downwardly and inwardly at least far
enough to be engaged by a snap-on cap for said package;
to render visible and legible such legend on the ?lm.
in combination with a snap-on cap, including a top disk,
It will of course be understood that where the safety
seal film is not used, or where the advantage of legibility 55 and a skirt unitary therewith and depending therefrom,
of resilient plastic, the junction between top disk and skirt
through the closed package is to be dispensed with, the
of said cap comprising a thick relatively rigid portion ex
snap-on cap might be of opaque plastic or of plastic not
tending
peripherally along the top disk and a thick rela
_ sufficiently transparent to perform the remaining utilities
set forth.
tively rigid portion integral therewith, extending peripher
While the peripheral shoulder 18 is most desirable for 6.0 ally of the upper part of the skirt, the skirt having an
inwardly extending lower rim portion thickened circum
purchase in pushing the snap-on cap off the bottle for
ferentially, embracing and tangential to the downwardly
access thereto, it will be understood that within the scope
and inwardly sloping lower portion of the bead, the skirt
of the broader claims, a conventional pull tab could be
portion above the inwardly extending thickened lower
used for removal of the snap-on bottle cap in lieu of a
65 rim being of substantially uniform inner diameter greater
thick peripheral shoulder 18.
than that of the container neck embraced thereby, for
While the drawings are approximately to scale, the di
clearance with respect thereto and to provide a space and
mensions shown are largely illustrative and admit of
having a portion reduced in thickness relative to that of
some variation.
7
_
the junction to afford the ?exibility to permit the thick
As changes could be made in the above construction
and different embodiments of this invention could be 70 ened lower rim of the skirt to be snapped in place under
the bead under cap-applying pressure; the top disk of the
made without department from the scope of the claims,
snap-on cap having the central portion thereof corres
it is intended that all matter contained in the above de
ponding substantially to the bore of the container, of
scription or shown in the accompanying drawings shall be
thickness materially less than that of the rim portion of
interpreted as illustrative and not in a limiting sense.
Having thus described our invention, what we claim 75 the top disk that is adjacent the junction thereof with the
3,01,19,933
F?
5)
.
skirt, a tamperproof vinner seal?hn interposed between
enhanced resiliency thereof and for ready venting of the
the container rim and the snap-on cap with an adhesive
bond with respect to the container rim at that portion near
the bore of the bottle neck whiehis at highest level,
whereby the vertical component of pressure exerted tan
gentially of the lower portion of the head against the in-v
vapor of the liquid carrier of the adhesive that bonds the
tamper-proof seal to the bottle rim.
wardly extending rim portion of the skirt will exert
maximum leverage transmitted through the relatively stiff
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,979,706
Rearny __, ____________ __ Nov. 6, 1934
junction of the cap for effective seating of the cap against
2,188,946
Gutrnann ____________ __ Feb. 6, 1940
the most elevated area of the container rim close to the 10
2,772,802 '
2,901,140
Woydatt ________ __v__._._. Dec. 4, 1956
Robinson __.__ _________ __ Aug. 25, 1959
2,906,421
Jordanoff ____________ __ Sept. 29, 1959
peripherally inwardly extending rim at the lower portion
519,553
464,785
Great Britain ________ __ Mar. 29, 1940
Italy _______________ __ July 21, 1951
ofthe skirt of the snap-on cap has a plurality of equi
285,651
Switzerland ____ ______ __ Jan. 16, 1953
distant interruptions in its inwardly extending rim for
321,821
Switzerland __________ __ July 15, 1957
bore of the neck, said snap-on cap having means unitary
therewith to facilitate its removal from the container,
said inwardly extending rim having at least one transverse
FOREIGN PATENTS
groove or scallop to provide a vent to said space.
4.'The combination recited in clairn3 in which the
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