US3809277A - Seal cap - Google Patents

Seal cap Download PDF

Info

Publication number
US3809277A
US3809277A US00135831A US13583171A US3809277A US 3809277 A US3809277 A US 3809277A US 00135831 A US00135831 A US 00135831A US 13583171 A US13583171 A US 13583171A US 3809277 A US3809277 A US 3809277A
Authority
US
United States
Prior art keywords
cap
annular skirt
set forth
lugs
millimeter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00135831A
Other languages
English (en)
Inventor
A Tschuggnal
L Kaltenhauser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3809277A publication Critical patent/US3809277A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/16—Snap-on caps or cap-like covers
    • B65D41/18—Snap-on caps or cap-like covers non-metallic, e.g. made of paper or plastics
    • B65D41/185—Snap-on caps or cap-like covers non-metallic, e.g. made of paper or plastics with integral internal sealing means

Definitions

  • This invention relates to a seal cap of a resilient plastic material and serves for the original sealing of bottle having a neck rim bead by means of a cap closing machine, which seal cap comprises an outer annular skirt having a beaded lower edge, which is intended to engage the lower portion of the neck rim bead of the bottle, and an inner annular skirt, which is intended to sealingly engage the inside of the bottleneck;
  • a bottle'having a neck rim bead is usually sealed with a so-called crown cork made of metal.
  • the metallic crown cork is permanently deformed so that a bottle which has been opened cannot be subsequently sealed with the same 'cork.
  • the metallic crown cork must be provided with an insert of cork or plastic material in order to ensure a reliable seal of the filled bottle.
  • a sea] cap made of resilient plastic material has been used in an endeavor to avoid the above-mentioned disadvantages.
  • a seal cap of this type is lighter in weight, may be made in one piece, e.g., by injection molding, and if properly designed may be used to re-seal the bottle when it has been opened.
  • a seal cap of the kind described first hereinbefore has been described in the Austrian Pat. Specification 245,415. That known seal cap is provided with a beaded lower edge that has such a thickness and a beveled surface so that an opening tool of thekind which is conventional with a metallic crown cork can be applied. l-lence, a bottle thatv has been sealed with the known seal cap is opened in the known manner but without deformation of the resilient seal cap so that the same may be used to re-seal the bottle.
  • the sealing action of the known seal cap is due not only to the outer annular skirt, which is in tight resilient contact with the neck rim bead of the bottle, but also to the inner annular skirt, which is of a greater height than the height of the outer annular skirt and has sealing projections which engage the inside surface of the bottleneck.
  • the outside surface of the outer annular skirt is knurled or milled.
  • the known seal cap must be applied by a machine.
  • the known seal cap of resilient plastic material cannot be applied by a conventional apparatus that applies a metallic crown cork. Such apparatus operates basically as follows:
  • the filled bottle to be sealed stands on a vertically movable support under a circular opening.
  • a hollowconical press die is disposed over said opening.
  • a sorting device is provided, which produces an air stream by which the metallic crown cork intended for the bottle is carried in the proper orientation to a position over the opening.
  • the crown cork still has an outwardly protruding conical rim, which rests on the support around the opening.
  • the bottle is now raised to extend through the opening and to engage the cork and force the same into the conical die, which deforms the crown cork so that the latter conforms to the bottleneck.
  • the bottle now provided with the cork is then lowered through the opening.
  • the diameter of the opening is selected to clear the bottleneck and the crown cork conforming thereto. Because a seal cap of resilient plastic material has the same outside diameter before and after its application to the bottleneck, the
  • seal cap cannot be supported around the opening.
  • Such sealing apparatus is also unsuitable for applying other known seal caps which are made from resilient plastic material and provided with a rim which can be torn off or torn open by means of projecting tabs and/or noses. Whereas these known seal caps could be supported over the opening by means of these projections, the bottle when sealed as described could not be retracted through the opening.
  • the lower edge of the outer skirt is provided with spaced apart, outwardly directed projections, which have .such a strength that they can support the weight of the cap itself on an annular supporting surface but tend to bend upwardly under the action of the weight of the filled bottle.
  • the seal cap according to the present invention can be used in a machine of the type described above.
  • the projections prevent the cap from falling through the opening.
  • the action of the weight of the filled bottle is sufficient to bend the projections upwardly as the applied cap is moved through the opening so that these projections will not prevent the passage of the cap.
  • the projections may suitably consist of thin, flat lugs, which are highly flexible and have a relatively large engaging surface.
  • the seal cap is provided with lugs having a thickness of about l/ 10 millimeter, a radial length of about 178 millimeter and a maximum width of about 178 millimeter.
  • the projections increase the outside diameter of the seal cap by about 1 millimeter when the cap is supported over the opening whereas the increase is only 1/10 millimeter when the projections have been bent upwardly. Owing to that difierence, the sealed bottle can be lowered through the suitably dimensioned opening.
  • the lugs may be approximately semicircular so that the rounded end of the lugs facilitates the sliding of the lugs over the rim of the opening in a downward direction.
  • the lugs have suitably a largest width at a point which is spaced from the lower edge of the cap and the lugs are narrower at the portion where they are to be bent so that they can be bent more easily whereas their edge portion intended to rest on the support to hold the cap over the opening has a larger width.
  • the projections are suitably spaced apart by a distance which is twice their largest width. With that arrangement, the retraction of the sealed bottle through the opening will not be braked by an excessive air drag.
  • the seal cap according to the present invention maybe provided with means to improve the firm and tight fit of the cap on the bottle.
  • the top of the cap may initially have an inwardly protruding conical portion within the inner annular skirt. That portion of the top of the cap is forced outwardly under the pressure in the bottle when the cap has been applied thereto. This pressure action increases the contact pressure between the beaded edge of the cap and the bottleneck so that the seal cap has a firmer fit.
  • the inside surface 'of the outer annular skirt above the edge bead and/or the underside surface of the top of the cap outside of the inner annular skirt may be roughened. That design will ensure a slip-proof fit of the seal 'cap even when the bottleneck is in a moisten condition as a result of cleaning and filling operations.
  • the provision of a rough surface does not add to the manufacturing costs; that surface may be provided in an economical manner by sandblasting the mold for the seal cap in the desired areas.
  • the seal cap may be provided on its inner annular --skirt with peripheral sealing projections in the form of lips, which extend downwardly and outwardly from the skirt and have a width of about 4/10 millimeter and a thickness of about l/lO millimeter.
  • the sorting device associated with such machine may also be used with the present seal cap.
  • a seal cap according to the present invention may have a knurled edge portion on the outside surface of the outer annular skirt and may be designed to have a smooth peripheral surface portion in a height of at least 4 millimeters between the knurled edge portion and the top of the cap. Owing to that smooth edge portion, the conventional sorting device can test whether the seal cap has the correct orientation and can correct the desired orientation of the seal cap when this is required.
  • FIG. 1 is an enlarged bottom view showing a seal cap
  • FIG. 2 is a sectional view taken through the inverted I positioned cap on line II-II in FIG. 1,
  • FIG. 3 is an enlarged view showing a detail of a different embodiment
  • FIG. 4 is a view similar to FIG. 3 and shows a detail of a further embodiment.
  • the seal cap shown in FIGS. 1. and 2 consists of a single piece of resilient plastic material.
  • the cap has a circular substantially flat top portion or top 1, an outer annular skirt 2 formed on the peripheral of the top and an inner concentrically spaced annular skirt 3, which is of a lesser height than the height of the outer annular skirt 2.
  • the outer annular skirt 2 is provided with a bead 4, which engages the lower portion of a neck rim bead of a normally vertically positioned filled bottle (not shown) to which the cap has been applied.
  • Outwardly directed projections 5 protrude from and are spaced apart around the lower edge. These projections are integrally injection-molded with the seal cap and have a thickness a of about 1/10 millimeter, a length b in the radial direction of the cap of about millimeter and a largest width c also of about millimeter. The spacing d of the projections 5 is about twice their largest width. ln the embodiment shown in FIG. 1, the projections are approximately semicircular.
  • FIGS. 3 and 4 is an enlarged view showing a portion of the lower edge of a different embodiment, in which the projections have a largest width at a point which isv limeters is provided between the knurled edge portion 6 and the top 1 of the cap.
  • the inner annular wall3 is provided with sealing pro jections 8 in the form of peripheral lips having a width of about 4/10 millimeter and a thickness of l/ 10 millimeter. These lips extend downwardly and outwardly from the skirt 3. In this connection, the term downwardly is applicable when the seal cap is in position on the normally vertically positioned filled bottle.
  • FIG. 2 shows the seal cap in an inverted position and indicates the inclination of the sealing projections 8.
  • the top 1 of the cap has an inwardly and downwardly protruding conical portion la inside of the inner annular skirt. The pressure in a bottle to which the seal cap is applied will force said portion la outwardly.
  • That portion of the inside surface of the top 1 which is disposed outside of the inner annular skirt 3 and the inside surface of the outer annular skirt 2 is roughened.
  • the mold used to make the cap is sandblasted in the desired areas.
  • the roughening feature has been exaggerated in FIG. 2 for greater clearness.
  • the invention is not restricted to the embodiments shown by way of example. Specifically, the shape and dimensions of the projections may be varied in dependence on the resiliency of the material which is used and on the nature of the bottles and of the machines used to seal the same. The design of the outside surface of the seal cap may also be modified in adaptation to an existing sorting device.
  • said outer annular skirt having outwardly directed spaced projecting lugs to support said cap and bend upwardly under pressure, said lugs having greater flexibility than said skirt portion;
  • the top of the cap having an inwardly protruding conical portion and an inner annular skirt;
  • said inner annular skirt being roughened and having inclined sealing projections.
  • a cap as set forth in claim 2 in which said lugs have a thickness of l l millimeter and a radial length of /2 millimeter 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
US00135831A 1970-04-30 1971-04-21 Seal cap Expired - Lifetime US3809277A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702021372 DE2021372A1 (de) 1970-04-30 1970-04-30 Verschlusskappe aus elastischem Kunststoff fuer Flaschen mit Wulsthalsrand

Publications (1)

Publication Number Publication Date
US3809277A true US3809277A (en) 1974-05-07

Family

ID=5769974

Family Applications (1)

Application Number Title Priority Date Filing Date
US00135831A Expired - Lifetime US3809277A (en) 1970-04-30 1971-04-21 Seal cap

Country Status (10)

Country Link
US (1) US3809277A (fr)
AT (1) AT308579B (fr)
BE (1) BE766465A (fr)
CH (1) CH534083A (fr)
DE (1) DE2021372A1 (fr)
DK (1) DK123921B (fr)
FR (1) FR2086487B1 (fr)
GB (1) GB1324764A (fr)
LU (1) LU63071A1 (fr)
NL (1) NL7105468A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784259A (en) * 1987-01-30 1988-11-15 Abbott Laboratories Container construction with vaned extractor
US20050127023A1 (en) * 2003-12-15 2005-06-16 Fredy Mockli Push-off cap of plastic

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU256254A (en) * 1954-08-23 1955-02-24 Stamicarbon Nv Method of and apparatus for automatically measuring the specific radiation absorption capacity per unit of mass of solid particles
GB970531A (en) * 1963-09-13 1964-09-23 William Hartill Improved closure member for bottles
US3231123A (en) * 1963-07-20 1966-01-25 Andersen Hans Christian Closure for crown cork bottles and similar containers
US3254785A (en) * 1965-03-22 1966-06-07 Walter C Lovell Closures
US3300073A (en) * 1963-12-05 1967-01-24 Benz Erwin Elastic closure for a container opening
FR1476798A (fr) * 1966-03-02 1967-04-14 Desjonqueres Plastiques élément perfectionné de bouchage
US3343700A (en) * 1963-11-07 1967-09-26 Heubl Walter Bottle stopper
US3462035A (en) * 1967-07-28 1969-08-19 Jean Grussen Plastic bottle cap with integral handle
US3549038A (en) * 1967-11-23 1970-12-22 Hohenzollern Huettenverwalt Cap with frangible portions

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU256254A (en) * 1954-08-23 1955-02-24 Stamicarbon Nv Method of and apparatus for automatically measuring the specific radiation absorption capacity per unit of mass of solid particles
US3231123A (en) * 1963-07-20 1966-01-25 Andersen Hans Christian Closure for crown cork bottles and similar containers
GB970531A (en) * 1963-09-13 1964-09-23 William Hartill Improved closure member for bottles
US3343700A (en) * 1963-11-07 1967-09-26 Heubl Walter Bottle stopper
US3300073A (en) * 1963-12-05 1967-01-24 Benz Erwin Elastic closure for a container opening
US3254785A (en) * 1965-03-22 1966-06-07 Walter C Lovell Closures
FR1476798A (fr) * 1966-03-02 1967-04-14 Desjonqueres Plastiques élément perfectionné de bouchage
US3462035A (en) * 1967-07-28 1969-08-19 Jean Grussen Plastic bottle cap with integral handle
US3549038A (en) * 1967-11-23 1970-12-22 Hohenzollern Huettenverwalt Cap with frangible portions

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784259A (en) * 1987-01-30 1988-11-15 Abbott Laboratories Container construction with vaned extractor
US20050127023A1 (en) * 2003-12-15 2005-06-16 Fredy Mockli Push-off cap of plastic

Also Published As

Publication number Publication date
FR2086487B1 (fr) 1975-07-04
FR2086487A1 (fr) 1971-12-31
DK123921B (da) 1972-08-21
DE2021372A1 (de) 1971-11-11
NL7105468A (fr) 1971-11-02
GB1324764A (en) 1973-07-25
BE766465A (fr) 1971-09-16
LU63071A1 (fr) 1971-08-27
AT308579B (de) 1973-07-10
CH534083A (de) 1973-02-28

Similar Documents

Publication Publication Date Title
US3055526A (en) Plastic cap
US3991904A (en) Hinged closures
US6082569A (en) Linerless closure for carbonated beverage container
US2772012A (en) Method and device for manufacturing closure caps and closure cap produced thereby
US3025989A (en) Closures for containers
US1910913A (en) Container closure
US3053406A (en) Screw cap
US2543775A (en) Container closure
US3247994A (en) Plastic caps for use as closure for containers
US3465907A (en) Closure seal for containers having screw threaded necks
US3828963A (en) Recessed crown cap
US2327454A (en) Padless crown cap
US3169656A (en) Bottle closure
US3300072A (en) Sealing of crown cap bottles
US2989204A (en) Containers having removable closure caps
US3780897A (en) Stoppers
US2339827A (en) Closure cap and package
US3631650A (en) Closing of containers
US3994410A (en) Plastic bottle cap
US3809277A (en) Seal cap
US2581647A (en) Crown cap and pad
US3360148A (en) Closure with a molded ring gasket
US3805994A (en) Containers and plastic snap-closures therefor for use with automatic capping machines
US3207350A (en) Sealing closure for a crown-type bottle
US3071275A (en) Closure cap and method of making same