US3485410A - Pressure relief score - Google Patents

Pressure relief score Download PDF

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Publication number
US3485410A
US3485410A US695980A US3485410DA US3485410A US 3485410 A US3485410 A US 3485410A US 695980 A US695980 A US 695980A US 3485410D A US3485410D A US 3485410DA US 3485410 A US3485410 A US 3485410A
Authority
US
United States
Prior art keywords
pull tab
container
panel
line
along
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
US695980A
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English (en)
Inventor
Arnold R Boik
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
Application granted granted Critical
Publication of US3485410A publication Critical patent/US3485410A/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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • B65D17/4011—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening completely by means of a tearing tab
    • 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
    • B65D2205/00—Venting means

Definitions

  • This invention specifically has to do with an easy opening container end unit of the full opening type wherein the problem of implosion and explosion is eliminated by the provision of a specific weakening at a specific point on the container end unit.
  • the weakening line is in the form of a score which extends generally transversely of the axis of the associated pull tab and underlies the pull tab so ,as to be protected thereby.
  • Another feature of the weakening line formed in accordance with this invention is that ⁇ the weakening line has reversely curved ends so as to restrict the tearing of the endV unit along the weakening line.
  • a further feature of the invention is that the ends of the weakening line converge towards one another and are generally directed to the point of engagement of the pul tab with a peripheral weakening line which defines the removable panel portion with the weakening line functioning as a hinge line during the initial opening of the container.
  • FIGURE 1 is aplan view of a can having an end unit formed in accordance with this invention.
  • FIGURE 2 is an enlarged fragmentary vertical sectional view taken along the line 2-2 of FIGURE 1 and shows the specific details of the end unit.
  • FIGURE 4 is an enlarged fragmentary vertical sectional view similar to FIGURE 2 and shows the initial rupture of the end unit along the weakening line as an opening pressure is being applied to the end unit through the use of the pull tab.
  • FIGURE 5 is an enlarged fragmentary vertical sectional view similar to FIGURE 2 showing the end unit after the movement of the pull tab to a final rupturing position prior to the tearing out of the removable panel portion.
  • the can 10 includes a body 11 which is of a conventional construction and which has the upper end thereof closed by means of an end unit, which end unit is generally referred to by the numeral 12 and which is the subject of this invention.
  • the end unit 12 includes an end panel 13 which has the peripheral portion thereof secured to the body 11 by means of a conventional double seam 14.
  • the end unit 12 is of the full opening type in that the end panel 13 is ⁇ provided with a peripheral weakening or score line 15 which is disposed closely adjacent the outer extremity of the end panel 13.
  • the end panel 13 is initially ruptured along a portion of the score line 15 and thereafter the portion of the end panel defined by the score line 15 is torn out along the'score line.
  • This removable panel portion is defined by the numeral 16.
  • the removable panel portion 16 is provided with a pull tab 17 of the lever type.
  • the pull tab 17 has a central portion thereof permanently secured to the removable panel portion 16 by means of a rivet 18 which is integrally formed with the removable panel portion 16 in a conventional manner.
  • the pull tab 17 has a nose 20 which is aligned with a part ofthe score line 15 and when the opposite end of the pull tab 17 is elevated relative to the removable panel portion 16, the nose 20 exerts a downwardly directed pressure on the removable panel portion 16 at the score line 15 with the pressure, upon the continued lifting of the pull tab 17, being sufficient to effect the rupture of the end panel 13 along the score line 15.
  • the pull tab 17 may be utilized in the tearing out of the removable panel portion 16 so as to completely open the can 10.
  • FIGURE 3 it will be seen that there is formed in the removable panel portion 16 immediately adjacent the rivet 18 a weakening or score line 23.
  • the score line 23 has a central portion 24 which is arcuate in outline and which is disposed substantially concentric to the adjacent portion of the rivet 18.
  • the score line 23 also has reversely turned end portions 25 so that the score line 23 has an overall outline generally resembling a handle bar mustache.
  • the pull tab 17 overlies the score line 23 and thereby prevents accidental rupture of the end panel 13 along the score line 23. Secondly, when the can is packed at a pressure greater than atmospheric pressure, it will be seen that the pull tab 17 prevents a direct blowing out of gases from within the can 10 while not preventing the desired venting of the can. Further, it will be readily apparent that since the vent opening 26 is in the form of a crack, minute particles, such as ground coffee, etc. will not escape through the vent opening 26 with the outwardly owing gases.
  • vent opening 26 when the can 10 is packed at a pressure less than atmospheric pressure, the vent opening 26 will function to permit influx of air so as to equalize the pressure within the can 10 with the atmosphere prior to the rupture of the end panel 13 along the score line 15. In this manner the vent opening 26 functions to prevent implosion.
  • a further feature of the specific score line configuration is that by reversely turning the end portions 25 thereof, uncontrolled tearing or rupture of the end panel 13 is prevented.
  • the score line 23 facilitates the hinging of a part of the removable panel portion 16 during the initial opening of the can 10, as is shown in FIGURE 5. This hinging action is facilitated by the terminal ends of the end portions 25 being disposed in converging relation and generally directed to the point of engagement of the end panel 13 along the score line 15 by the nose of the pull tab 17.
  • pull tab 17 is illustrated as having a hinged connection with the rivet 18, it is to be understood that under certain circumstances, the pull tab 17 may be of a rigid construction with the necessary hinging action between the pull tab and the end panel being provided by the score line 23 upon the rupture of the end panel therealong.
  • a container panel of the type having a removable panel portion defined by a weakening line, a lever type pull tab overlying said removable panel portion, means permanently securing said pull tab to said removable panel portion with an end portion of said pull tab being positioned relative to said weakening line for applying a rupturing effecting force thereon when the opposite end of said pull tab is moved away from said container panel, said removable panel portion having an area thereof which is stressed during the initial movement of said pull tab while applying a force to said container panel along said weakening line, and a second weakening line disposed in said stressed area intermediate said first mentioned weakening line and the connection between said pull tab and said removable panel portion and having reversely turned end portions disposed in converging relation and extending generally towards ⁇ said first mentioned weakening line, the relative strength of said removable panel portion along said second weakening line in comparison to the stress applied thereto being less than the strength of said container panel along the lrst mentioned weakening line in comparison to the stress applied thereto whereby said container panel will first
  • a container panel of the type having a removable panel portion defined by a weakening line, a lever type pull tab overlying said removable panel portion, means permanently ⁇ securing said pull tab to said removable panel portion with an end portion of said pull tab being positioned relative to said weakening line for applying a rupturing effecting force thereon when the opposite end of said pull tab is moved away from said container panel, said removable panel portion having an area thereof which is stressed during the initial movement of said pull tab while applying a force to said container panel along said weakening line, and a second weakening line disposed in said lstressed area intermediate said first mentioned weakening line and the connection between said pull tab and said removable panel portion, the relative strength of said removable panel portion along said second weakening line in comparison to the stress applied thereto being less than the strength of said container panel along the first mentioned weakening line in comparison to the stress applied thereto whereby said container panel will first rupture along said second weakening line, the connection between said removable panel portion and said pull tab including a rivet of arcuate section

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
US695980A 1968-01-05 1968-01-05 Pressure relief score Expired - Lifetime US3485410A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69598068A 1968-01-05 1968-01-05

Publications (1)

Publication Number Publication Date
US3485410A true US3485410A (en) 1969-12-23

Family

ID=24795228

Family Applications (1)

Application Number Title Priority Date Filing Date
US695980A Expired - Lifetime US3485410A (en) 1968-01-05 1968-01-05 Pressure relief score

Country Status (5)

Country Link
US (1) US3485410A (de)
AT (1) AT286164B (de)
BR (1) BR6905319D0 (de)
FR (1) FR1580786A (de)
GB (1) GB1193556A (de)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576272A (en) * 1969-06-30 1971-04-27 Procter & Gamble Score-line structure
US3643833A (en) * 1969-11-04 1972-02-22 Ermal C Fraze Easy opening container wall
US3874553A (en) * 1973-07-19 1975-04-01 Aluminum Co Of America Easy opening can end with embossed panel
US4257529A (en) * 1979-04-12 1981-03-24 National Steel Corporation Easy-open retained tab structure for beverage can
US4928845A (en) * 1987-10-19 1990-05-29 Doyle Michael J M End face with tear-off lip closure for pressurized container
US5011037A (en) * 1989-11-30 1991-04-30 Adolph Coors Company Container end member
US5688544A (en) * 1995-04-18 1997-11-18 Kraft Foods, Inc. Easy opening ventable closure for sealed particulate product package
US5738237A (en) * 1995-06-07 1998-04-14 Aluminum Company Of America Easy open container end, method of manufacture, and tooling
US5819973A (en) * 1996-12-31 1998-10-13 Traub, Sr.; John J. Beverage container lid having a lift tab for opening an aperture and vent hole
US20110056945A1 (en) * 2009-09-04 2011-03-10 Christopher Paul Ramsey Full aperture beverage end
US20110056944A1 (en) * 2008-09-19 2011-03-10 Adriana Brizio Can for the extemporaneous preparation of beverages by extraction and/or infusion, provided with a safety lid
USD641623S1 (en) 2010-08-23 2011-07-19 Crown Packaging Technology, Inc. Full longitudinally oriented oval aperture can
USD641622S1 (en) 2010-06-10 2011-07-19 Crown Packaging Technology, Inc. Full aperture open beverage can
USD643718S1 (en) 2010-08-23 2011-08-23 Crown Packaging Technology, Inc. Full offset-circular aperture can
USD647400S1 (en) 2010-06-10 2011-10-25 Crown Packaging Technology, Inc. Full aperture open beverage can
USD649049S1 (en) 2010-06-10 2011-11-22 Crown Packaging Technology, Inc. Full aperture open beverage can
USD669781S1 (en) 2010-08-23 2012-10-30 Crown Packaging Technology, Inc. Full transversely oriented oval aperture can
US9181007B2 (en) 2013-03-12 2015-11-10 Rexam Beverage Can Company Beverage can end with vent port
KR20160043990A (ko) 2013-08-14 2016-04-22 닛신 세이코 가부시키가이샤 전반사 특성과 내식성이 우수한 Al 피복 강판 및 이의 제조법
US9714114B2 (en) 2013-11-08 2017-07-25 Crown Packaging Technology, Inc. Full aperture can end
EP3148886A4 (de) * 2014-05-30 2018-01-17 Silgan Containers LLC Dosenende für unter druck stehende lebensmitteldose aus metall mit abgeschirmter entlüftungskerbe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366270A (en) * 1966-05-27 1968-01-30 Continental Can Co Pull tab for easy opening can end
US3381848A (en) * 1966-10-05 1968-05-07 Fraze Ermal C Easy-opening can end
US3404801A (en) * 1967-04-21 1968-10-08 Fraze Ermal C Easy-opening container wall with scoreline vent

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366270A (en) * 1966-05-27 1968-01-30 Continental Can Co Pull tab for easy opening can end
US3381848A (en) * 1966-10-05 1968-05-07 Fraze Ermal C Easy-opening can end
US3404801A (en) * 1967-04-21 1968-10-08 Fraze Ermal C Easy-opening container wall with scoreline vent

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576272A (en) * 1969-06-30 1971-04-27 Procter & Gamble Score-line structure
US3643833A (en) * 1969-11-04 1972-02-22 Ermal C Fraze Easy opening container wall
US3874553A (en) * 1973-07-19 1975-04-01 Aluminum Co Of America Easy opening can end with embossed panel
US4257529A (en) * 1979-04-12 1981-03-24 National Steel Corporation Easy-open retained tab structure for beverage can
US4928845A (en) * 1987-10-19 1990-05-29 Doyle Michael J M End face with tear-off lip closure for pressurized container
US5011037A (en) * 1989-11-30 1991-04-30 Adolph Coors Company Container end member
US5688544A (en) * 1995-04-18 1997-11-18 Kraft Foods, Inc. Easy opening ventable closure for sealed particulate product package
US5738237A (en) * 1995-06-07 1998-04-14 Aluminum Company Of America Easy open container end, method of manufacture, and tooling
US5819973A (en) * 1996-12-31 1998-10-13 Traub, Sr.; John J. Beverage container lid having a lift tab for opening an aperture and vent hole
US9259117B2 (en) * 2008-09-19 2016-02-16 Adriana Brizio Can for the extemporaneous preparation of beverages by extraction and/or infusion, provided with a safety lid
AU2008361954B2 (en) * 2008-09-19 2015-10-01 Adriana Brizio Can for the extemporaneous preparation of beverages by extraction and/or infusion, provided with a safety lid
US20110056944A1 (en) * 2008-09-19 2011-03-10 Adriana Brizio Can for the extemporaneous preparation of beverages by extraction and/or infusion, provided with a safety lid
EP2878547A1 (de) * 2009-09-04 2015-06-03 Crown Packaging Technology, Inc Getränkedosendeckel mit vollständiger Öffnung
US20110056945A1 (en) * 2009-09-04 2011-03-10 Christopher Paul Ramsey Full aperture beverage end
US10053260B2 (en) 2009-09-04 2018-08-21 Crown Packaging Technology, Inc. Full aperture beverage end
CN102625769B (zh) * 2009-09-04 2016-01-13 皇冠包装技术公司 全孔口饮料罐端部
WO2011026900A1 (en) * 2009-09-04 2011-03-10 Crown Packaging Technology, Inc. Full aperture beverage can end
USD641239S1 (en) 2009-09-04 2011-07-12 Crown Packaging Technology, Inc. Full aperture open beverage can
CN102625769A (zh) * 2009-09-04 2012-08-01 皇冠包装技术公司 全孔口饮料罐端部
US8939308B2 (en) 2009-09-04 2015-01-27 Crown Packaging Technology, Inc. Full aperture beverage end
USD649049S1 (en) 2010-06-10 2011-11-22 Crown Packaging Technology, Inc. Full aperture open beverage can
USD647400S1 (en) 2010-06-10 2011-10-25 Crown Packaging Technology, Inc. Full aperture open beverage can
USD641622S1 (en) 2010-06-10 2011-07-19 Crown Packaging Technology, Inc. Full aperture open beverage can
USD669781S1 (en) 2010-08-23 2012-10-30 Crown Packaging Technology, Inc. Full transversely oriented oval aperture can
USD643718S1 (en) 2010-08-23 2011-08-23 Crown Packaging Technology, Inc. Full offset-circular aperture can
USD641623S1 (en) 2010-08-23 2011-07-19 Crown Packaging Technology, Inc. Full longitudinally oriented oval aperture can
US9181007B2 (en) 2013-03-12 2015-11-10 Rexam Beverage Can Company Beverage can end with vent port
KR20160043990A (ko) 2013-08-14 2016-04-22 닛신 세이코 가부시키가이샤 전반사 특성과 내식성이 우수한 Al 피복 강판 및 이의 제조법
US9714114B2 (en) 2013-11-08 2017-07-25 Crown Packaging Technology, Inc. Full aperture can end
EP3148886A4 (de) * 2014-05-30 2018-01-17 Silgan Containers LLC Dosenende für unter druck stehende lebensmitteldose aus metall mit abgeschirmter entlüftungskerbe
US10106306B2 (en) 2014-05-30 2018-10-23 Silgan Containers Llc Can end for pressurized metal food can with shielded vent score

Also Published As

Publication number Publication date
AT286164B (de) 1970-11-25
DE1757630A1 (de) 1971-04-29
GB1193556A (en) 1970-06-03
FR1580786A (de) 1969-09-05
DE1757630B2 (de) 1976-06-16
BR6905319D0 (pt) 1973-01-30

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