US3448881A - Closure with means to control opening torque - Google Patents

Closure with means to control opening torque Download PDF

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Publication number
US3448881A
US3448881A US635439A US63543967A US3448881A US 3448881 A US3448881 A US 3448881A US 635439 A US635439 A US 635439A US 63543967 A US63543967 A US 63543967A US 3448881 A US3448881 A US 3448881A
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US
United States
Prior art keywords
cap
finish
gasket
closure
container
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
US635439A
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English (en)
Inventor
Donald H Zipper
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.)
Continental Can Co Inc
Original Assignee
Continental Can Co Inc
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 Continental Can Co Inc filed Critical Continental Can Co Inc
Priority to US635439A priority Critical patent/US3448881A/en
Priority to DE1657136A priority patent/DE1657136C3/de
Priority to AT254468A priority patent/AT283188B/de
Priority to FI681196A priority patent/FI51078C/sv
Priority to NL6805955A priority patent/NL6805955A/xx
Priority to FR149834A priority patent/FR1564263A/fr
Priority to GB2068/68A priority patent/GB1206368A/en
Application granted granted Critical
Publication of US3448881A publication Critical patent/US3448881A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0435—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
    • B65D41/0457—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements the sealing element covering or co-operating with the screw-thread or the like of a container neck

Definitions

  • One means to prevent increase in torque removal consists of forming the top panel of the shell of the cap with a debossment or groove which, on the underside, forms a ridge axially opposed to the top rim of the closure. If continuous, the ridge defines with the rim a thin gasket area serving to reduce oxygen permeation through the gasket.
  • This invention relates to improvements in packages of the typewherein a press-on turn-off type cap is applied to a container finish. More specifically, the present invention relates to improvements in the torque removal characteristics in packages of the type illustrated and described in U.S. Patents Nos. 3,270,904 and 3,285,452.
  • the closure cap Prior to application, the closure cap is linedwith a suitable gasket compound, such as a foamed plastisol or the like which, with time and/ or heat, forms a cam-off means to co-operate with threads or a cam-off means on the container to permit removal of the cap by rotation.
  • a suitable gasket compound such as a foamed plastisol or the like which, with time and/ or heat, forms a cam-off means to co-operate with threads or a cam-off means on the container to permit removal of the cap by rotation.
  • the container finish is of a frusto-conical shape and has cam-01f means such as threads embossed thereon.
  • the co-operating closure cap is formed with a top panel and depending skirt and a lining of gasket material which, on capping, conforms to the shape of the container finish.
  • One product which is commonly packed in this type of package is baby foods.
  • subsequent treatment includes processing the filled and capped containers in high temperature and pressure retorts.
  • Another method of packaging is to fill the package with the contents in a heated condition, and thereafter apply the cap, permitting the package to cool.
  • the present invention relates to a novel means for preventing the increase in removal torque which was discovered to be attributable to the settling of the cap on the finish.
  • the present invention is directed to a means which prevents such settling of the cap onto the finish and, in one embodiment, also provides a means which serves to reduce the thickness of the gasket material and thereby reduce the cross-sectional area through which oxygen may permeate.
  • One form of the means which prevents settling may consist of a continuous groove formed in the top panel of the cap and presenting on the underside a continuous ridge which is disposed in axial opposition to the rim of the container finish. In this design, the cross-sectional area of the gasket material between the ridge and the rim of the container finish is minimized to provide good resistance to oxygen permeation.
  • FIGURE 1 is an enlarged diametric cross-sectional view of a shell of a closure cap embodying the present invention
  • FIGURE 2 is a top plan view of the shell of FIGURE 1 on a slightly reduced scale
  • FIGURE 3 is an enlarged cross-sectional view of the shell of FIGURE 1 after it has been lined with gasket compound;
  • FIGURE 4 is a half-sectional view of the closure cap of FIGURE 3 after application to a container shown in fragmentary cross section;
  • FIGURE 5 is a top plan view of a modified form of shell.
  • FIGURE 6 is an enlarged fragmentary cross-sectional view taken generally along the line '66 of FIGURE 5.
  • reference numeral 10 indicates a body or shell having a top panel portion indicated generally at 11 and a depending skirt portion designated at 12.
  • the cap bodies or shells are stamped from suitably coated tin plate or the equivalent.
  • the plate is enameled on the exterior and the interior may be enameled or coated with a known lacquer formulation to form a protective coating on the underside of the shell, as well as to provide an attractive appearance.
  • the bottom edge of the depending skirt 12 is rolled, as at 13, to reinforce the edge, provide a neat appearance and turn in the sharp edge left by the stamping operation, hiding it for consumer safety and corrosion protection.
  • the skirt 12 may be formed to any desired shape, such as the one shown, or a frusto-conical shape, cylindrical shape or the like.
  • the middle portion 14 of the skirt is of frusto-conical shape, while the upper and lower portions are generally cylindrical, as indicated at 15 and 16.
  • a continuous annular shoulder 17 is formed in the top panel portion .11 and forms one of the side walls of a channel 18 (FIGURE 1).
  • the outer side wall of the channel 18 is formed by a rounded shoulder 20 formed at the intersection of the skirt 12 with the top panel 11.
  • a continuous annular groove 21 which, when viewed from the underside of the top panel 11, presents a continuous raised ridge 22 extending in the direction of the skirt.
  • the annular groove 21 may be formed at the time the closure cap is stamped to the configuration'shown.
  • the shell 10 is lined with gasket compound around the entire inner surface of the skirt 12 with the gasket material extending onto the top panel 11 and substantially filling the channel or groove 18 in the manner shown at 23 in FIGURE 3 and, thus, forming a closure cap indicated generaly at 24.
  • the gasket material 23 may be deposited by any suitable means, such as metering a measured quantity while slowly rotating the shell 10 in an inverted position or the equivalent. If required, it may be subsequently molded to any desired shape.
  • the gasket composition may be of any suitable type, however, the problem outlined above was most prevalent in gasket compositions formed from foamed or puffed plastisols.
  • reference numeral 30 indicates a package which is formed by applying the closure cap 24, shown in FIGURE 3, to a container 31.
  • the container 31 may be of any suitable type, such as a glass jar having a finish 32 which includes threads 33 embossed on the outer circumference 34. At the upper end of the finish, the container mouth is defined by a rim 35 which is adapted for reception into the gasket channel 18. While a threaded container finish is shown, it may include cam-off means of any suitable type such as is illustrated and described in the above-mentioned patents. As torque removal due to cap settling or the like is only experienced in closures in which threads or cam-oft means are formed in the gasket, the present invention is mainly applicable to this field.
  • the closure cap 24 is applied to the container finish 32 by means of a press-on motion which causes the gasket material 23 to deform and assume the configuration shown, conforming to the shape of the circumference or external portion of the container finish and top rim 35. In this manner, threads 36 are formed in the gasket compound which, with the passage of time and/or application of heat, become sufiiciently rigid to permit subsequent re moval of the cap by rotation.
  • the ridge 22 projects toward the rim 35 and defines a thin gasket area 37. Ideally, from the standpoint of preventing cap settling, the ridge 22 should actually touch the rim 35, however, another factor, that of providing protection against impacts, dictates that a thin film covers the ridge to act as a cushion. Since the film is very thin in this area, settling of the cap with the attendant increase in torque removal is prevented. As is evident, the gasket material on opposite sides of the ridge 22 is of much greater thickness, with the intermediate material being very thin as shown at 37. In the absence of the ridge 22, the greater gasket thickness would permit substantial compression or settling of the cap with the passage of time, with an attendant increase in removal torque.
  • the annular ridge 22 forms a substantially rigid means, which when acting through the less rigid thin gasket material 37, prevents cap settling after application. It has been discovered that the torque required to remove the closure cap 24 will remain substantially constant when such means is provided.
  • the thin gasket material at 37 between the ridge 22 and rim 35 is of reduced cross-sectional area and, hence, the oxygen permeation is minimized. This is particularly important in packaging products such as strained meats or the like, which require an extremely low leak-rate cap due to the products sensitivity to oxygen even in very small amounts.
  • the novel co-operation of the ridge 22 and rim 35 to produce a narrow or thin gasket area material ly reduces the leak-rate of the present cap when compared to prior art caps of comparable types.
  • FIGURES 5 and 6 A modified form of the invention is illustrated in FIGURES 5 and 6 and includes a shell 40.
  • This shell 40 is of similar shape to the shell 10 shown in FIG- URE 1, however, is provided with a modified form of means to prevent the increase in cap removal torque in the form of a series of dimples 41 angularly arranged about the periphery of the top panel in the middle of the gasket channel 42. Any desired number of dimples may be provided, being dictated by the particular application, and they may be in the form of debossments formed during stamping and shaping of the shell. As seen in FIGURE 6, the dimples 41, when viewed in cross section, present a ridge 43 which is of similar shape'to the ridge 22, however, is not continuous.
  • the shell 40 is applied to the container finish .and functions to prevent increase in torque removal in the manner described above with respect to the closure cap 24, however, because of the lack of continuity, does not resist oxygen permeation as described in the embodiments of FIGURES 1-4.
  • a cap having a top panel and a circumferentially continuous depending skirt is applied to a container having a finish including thread forming means thereon and terminating in an upwardly facing top rim, said depending skirt of said cap surrounding said finish in spaced relation thereto and said top panel being disposed in axially opposed spaced relation with said rim, a layer of plastisol gasket material adhered to said skirt and extending onto said top panel of said cap, said gasket material having threads formed therein by said thread forming means on said container when said cap is applied to said finish thereby permitting removal of said cap by rotation relative to said container, the improvement which comprises means to prevent the increase in cap removal torque after application of said cap to said container, said means including means to prevent settling of said cap on said container finish after capping thereof due to gradual deformation of said gasket material in engagement with said top rim whereby increase in said removal torque is prevented.
  • said means to prevent settling of said cap on said finish comprises a continuous ring forming a ridge on the underside of said cap, said continuous ring being more rigid than said gasket material, said ridge being disposed in closer proximity to said finish than the immediately adjacent part of said cap whereby said continuous ring will prevent settling of said cap on said finish and thereby prevent increases in the opening torque of said cap.
  • said means to prevent settling of said cap on said container finish includes a continuous groove means formed in a top panel portion of said closure cap and forming a continuous annular ridge projecting toward said container finish, said gasket means being interposed between said continuous ridge and said container finish to provide a section of reduced thickness and thereby reduce the eifective cross-sectional gasket through which oxygen may permeate.
  • said means to prevent settling of said cap on said container finish after capping thereof comprises dimple means formed in said cap and projecting toward said container finish, said dimple means being provided at spaced locations around said closure cap and forming spaced ridges on the underside of said cap for disposition in closely spaced relation to said finish to prevent settling of said cap and thereby maintain opening torque thereof substantially constant over a prolonged period of time.
  • a closure cap of the press-on turn-off type said closure cap including a shell having a top panel portion and a continuous depending skirt portion, an endless layer of plastisol gasket material lining at least a part of said shell and being adapted to be reformed to conform to the shape of a container finish on press-on application thereto whereby thread means permitting removal of said cap by rotation will be formed, and means on said cap to prevent settling of said cap on said finish due to gradual deformation of said gasket material in engagement with said top rim and thereby preventing .an increase in torque removal after application of said cap to said container finish.
  • said means to prevent settling of said cap on said finish thereby preventing an increase in torque removal after application of said cap to said container finish comprises a continuous annular ridge formed on the underside of said top panel for disposition in axially opposed relation with said container finish, said gasket material covering said ridge in a thin layer to reduce oxygen permeation and prevent settling of said cap onto said container finish.
  • said means to prevent an increase in torque removal comprises ridge means in a gasket channel formed in said top panel of said shell, said ridge means being positioned for axial opposition with a top rim of said container finish to prevent settling of said cap after application thereto.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
US635439A 1967-05-02 1967-05-02 Closure with means to control opening torque Expired - Lifetime US3448881A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US635439A US3448881A (en) 1967-05-02 1967-05-02 Closure with means to control opening torque
DE1657136A DE1657136C3 (de) 1967-05-02 1968-03-09 Verschlußdeckel für Behälter
AT254468A AT283188B (de) 1967-05-02 1968-03-14 Verschlußdeckel für Behälter
FI681196A FI51078C (sv) 1967-05-02 1968-04-26 Kapsyl för förpackning.
NL6805955A NL6805955A (sv) 1967-05-02 1968-04-26
FR149834A FR1564263A (sv) 1967-05-02 1968-04-29
GB2068/68A GB1206368A (en) 1967-05-02 1968-05-01 Improvements in closures for containers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US635439A US3448881A (en) 1967-05-02 1967-05-02 Closure with means to control opening torque

Publications (1)

Publication Number Publication Date
US3448881A true US3448881A (en) 1969-06-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US635439A Expired - Lifetime US3448881A (en) 1967-05-02 1967-05-02 Closure with means to control opening torque

Country Status (7)

Country Link
US (1) US3448881A (sv)
AT (1) AT283188B (sv)
DE (1) DE1657136C3 (sv)
FI (1) FI51078C (sv)
FR (1) FR1564263A (sv)
GB (1) GB1206368A (sv)
NL (1) NL6805955A (sv)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3690497A (en) * 1971-03-08 1972-09-12 Continental Can Co Closure cap and package formed therewith
US3746199A (en) * 1971-06-14 1973-07-17 Anchor Hocking Corp Closure cap and sealed package
US3788508A (en) * 1971-12-30 1974-01-29 Continental Can Co Closures with corrosion halting means
JPS58216558A (ja) * 1982-05-20 1983-12-16 ナシヨナル・プラステイツクス・リミテイド 容器蓋素材
DE3332188A1 (de) * 1982-09-15 1984-03-15 Owens-Illinois, Inc., 43666 Toledo, Ohio Aufdrueck-abschraubverschluss fuer behaelter
US4562930A (en) * 1984-03-13 1986-01-07 Continental White Cap, Inc. Container finish for resealing with PT closure
US4576299A (en) * 1984-10-29 1986-03-18 Continental White Cap, Inc. Closure cap with improved top-load leakage resistance
US4717034A (en) * 1982-07-06 1988-01-05 Owens-Illinois Closure Inc. One-piece thermoplastic closure having press-on screw off structure including spaced vertical ribs in the skirt of the closure
US4863030A (en) * 1988-08-01 1989-09-05 Anchor Hocking Corporation Press-on, twist-off plastisol-lined metal closure
US5033633A (en) * 1990-01-12 1991-07-23 Continental White Cap, Inc. Plastic closure with safety button and method of forming same
US5692628A (en) * 1996-01-11 1997-12-02 Rexam Closure, Inc. Press-on screw-off self-tapping closure/container package
US6786348B2 (en) 2001-05-24 2004-09-07 Crown Cork & Seal Technologies Corporation Gasket for press-on twist-off closure
US20100230374A1 (en) * 2006-04-18 2010-09-16 Portola Packaging, Inc. Tapered thread structure
US20120091092A1 (en) * 2010-10-14 2012-04-19 Byrne Medical, Inc. Universal cap
US20130075355A1 (en) * 2010-05-27 2013-03-28 Pascal Probst Container having a threaded closure sleeve
USD839740S1 (en) * 2018-02-22 2019-02-05 Stolle Machinery Company, Llc Push button closure
USD839739S1 (en) * 2018-02-22 2019-02-05 Stolle Machinery Company, Llc Push button closure
USD845764S1 (en) * 2018-02-22 2019-04-16 Stolle Machinery Company, Llc Push button closure
USD845765S1 (en) * 2018-02-22 2019-04-16 Stolle Machinery Company, Llc Push button closure
USD857497S1 (en) 2018-02-22 2019-08-27 Stolle Machinery Company, Llc Push button closure
USD861486S1 (en) * 2018-02-22 2019-10-01 Stolle Machinery Company, Llc Push button closure
US11242176B2 (en) * 2016-02-23 2022-02-08 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Closure element for a container
US11643254B2 (en) * 2013-07-02 2023-05-09 Silgan Holdings Inc. Closure unit consisting of cover and vessel, closure cover and closing method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2085934A (en) * 1933-01-10 1937-07-06 Anchor Cap & Closure Corp Screw cap and package
US2848131A (en) * 1956-06-11 1958-08-19 Buhl Chenoweth Jr Bottle cap
US3142401A (en) * 1960-04-07 1964-07-28 Anchor Hocking Glass Corp Gasket composition
US3270904A (en) * 1964-05-21 1966-09-06 Continental Can Co Press-on turn-off cap

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2085934A (en) * 1933-01-10 1937-07-06 Anchor Cap & Closure Corp Screw cap and package
US2848131A (en) * 1956-06-11 1958-08-19 Buhl Chenoweth Jr Bottle cap
US3142401A (en) * 1960-04-07 1964-07-28 Anchor Hocking Glass Corp Gasket composition
US3270904A (en) * 1964-05-21 1966-09-06 Continental Can Co Press-on turn-off cap

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3690497A (en) * 1971-03-08 1972-09-12 Continental Can Co Closure cap and package formed therewith
US3746199A (en) * 1971-06-14 1973-07-17 Anchor Hocking Corp Closure cap and sealed package
US3788508A (en) * 1971-12-30 1974-01-29 Continental Can Co Closures with corrosion halting means
JPS58216558A (ja) * 1982-05-20 1983-12-16 ナシヨナル・プラステイツクス・リミテイド 容器蓋素材
US4717034A (en) * 1982-07-06 1988-01-05 Owens-Illinois Closure Inc. One-piece thermoplastic closure having press-on screw off structure including spaced vertical ribs in the skirt of the closure
DE3332188A1 (de) * 1982-09-15 1984-03-15 Owens-Illinois, Inc., 43666 Toledo, Ohio Aufdrueck-abschraubverschluss fuer behaelter
US4709825A (en) * 1982-09-15 1987-12-01 Owens-Illinois Closure Inc. Press-on twist-off closure for container
US4562930A (en) * 1984-03-13 1986-01-07 Continental White Cap, Inc. Container finish for resealing with PT closure
US4576299A (en) * 1984-10-29 1986-03-18 Continental White Cap, Inc. Closure cap with improved top-load leakage resistance
US4863030A (en) * 1988-08-01 1989-09-05 Anchor Hocking Corporation Press-on, twist-off plastisol-lined metal closure
US5033633A (en) * 1990-01-12 1991-07-23 Continental White Cap, Inc. Plastic closure with safety button and method of forming same
US5692628A (en) * 1996-01-11 1997-12-02 Rexam Closure, Inc. Press-on screw-off self-tapping closure/container package
US6786348B2 (en) 2001-05-24 2004-09-07 Crown Cork & Seal Technologies Corporation Gasket for press-on twist-off closure
US20100058574A1 (en) * 2001-05-24 2010-03-11 Crown Packaging Technology, Inc. Gasket for press-on twist-off closure
US7854106B2 (en) 2001-05-24 2010-12-21 Crown Packaging Technology, Inc. Gasket for press-on twist-off closure
US20100230374A1 (en) * 2006-04-18 2010-09-16 Portola Packaging, Inc. Tapered thread structure
US20130075355A1 (en) * 2010-05-27 2013-03-28 Pascal Probst Container having a threaded closure sleeve
US10470648B2 (en) 2010-10-14 2019-11-12 Medivators Inc. Universal cap
US9750398B2 (en) * 2010-10-14 2017-09-05 Medivators Inc. Universal cap
US20120091092A1 (en) * 2010-10-14 2012-04-19 Byrne Medical, Inc. Universal cap
US11643254B2 (en) * 2013-07-02 2023-05-09 Silgan Holdings Inc. Closure unit consisting of cover and vessel, closure cover and closing method
US11242176B2 (en) * 2016-02-23 2022-02-08 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Closure element for a container
USD839740S1 (en) * 2018-02-22 2019-02-05 Stolle Machinery Company, Llc Push button closure
USD857497S1 (en) 2018-02-22 2019-08-27 Stolle Machinery Company, Llc Push button closure
USD861486S1 (en) * 2018-02-22 2019-10-01 Stolle Machinery Company, Llc Push button closure
USD845765S1 (en) * 2018-02-22 2019-04-16 Stolle Machinery Company, Llc Push button closure
USD879608S1 (en) 2018-02-22 2020-03-31 Stolle Machinery Company, Llc Push button closure
USD899924S1 (en) 2018-02-22 2020-10-27 Stolle Machinery Company, Llc Push button closure
USD845764S1 (en) * 2018-02-22 2019-04-16 Stolle Machinery Company, Llc Push button closure
USD839739S1 (en) * 2018-02-22 2019-02-05 Stolle Machinery Company, Llc Push button closure

Also Published As

Publication number Publication date
FI51078C (sv) 1976-10-11
FR1564263A (sv) 1969-04-18
NL6805955A (sv) 1968-11-04
FI51078B (sv) 1976-06-30
AT283188B (de) 1970-07-27
DE1657136A1 (de) 1972-04-13
DE1657136B2 (de) 1973-12-20
GB1206368A (en) 1970-09-23
DE1657136C3 (de) 1974-08-08

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