Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3872970 A
Publication typeGrant
Publication dateMar 25, 1975
Filing dateJan 11, 1974
Priority dateJan 11, 1974
Publication numberUS 3872970 A, US 3872970A, US-A-3872970, US3872970 A, US3872970A
InventorsEdison Jack Roger
Original AssigneeLilly Co Eli
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Child-resistant blister package
US 3872970 A
Abstract
A child-resistant blister package with a receptacle formed from a stiff flexible sheet material having a flange extending about it and adhered to a cover sheet. The flange has a transverse arched portion that is spaced in a non-adherent relationship with the cover sheet which in turn has a weakened and rupturable portion in alignment with the arched portion of the flange. The arched portion of the flange is expandable and enables one to rupture the weakened portion of the cover sheet by stretching or pulling the blister package, thereby enabling one to pull off the remainder of the cover sheet.
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

b t; Elite States 1 [111 3,372,979 Edison [4 Mar. 25, 1975 CHILD-RESISTANT BLISTER PACKAGE 3,380,578 4/1968 Sparks 206/498 x Inventor: J Roger Edison, ia apo s, 3,809,22l 5/1974 Compere 206/498 X l d. n Primary Examiner-Leonard Summer [73] Assignee: Eli Lilly and Company, Indianapolis, Attorney, Agent, or Firm-Houston L. Swenson;

Ind. Everet F. Smith 22 Filed: Jan. 11, 1974 21 Appl. No.2 432,802 [57] ABSTRACT A child-resistant blister package with a receptacle formed from a stiff flexible sheet material having a [52] US. Cl 206/532, 2O6/4692290/g/1459t flange extending about it and adheredto a cover sheet. The flange has a transverse arched portion that [51] '3" 365d 17/24 865d 85/03 B65d 75/62 is spaced in a non-adherent relationship with the cover [58] Fleld of Search sheet which in turn has a weakened and rupturable 206/532 229/51 51 66 portion in alignment with the arched portion of the flange. The arched portion of the flange is expandable [56] References C'ted and enables one to rupture the weakened portion of I ED ST T S PATENTS the cover sheet by stretching or pulling the blister 3,054,503 9/1962 Hartman, Jr. et a] 206/531 package, thereby enabling one to pull off the remain- 3,207,299 9/1965 Sparks 206/532 der of the cover sheet. 3,255 872 6/1966 Long et ul t. 206/219 3 3283,2385 lI/l966 Grunewald er al. a. 206/42 7 Clam/1S, 6 Drawmg Flgures PATENTEDHARZSISYS FIG.2

FIG.I

1 CHILD-RESISTANT BLISTER PACKAGE BACKGROUND OF THE INVENTION Blister packages have been used for a number of years to provide an inexpensive means for packaging numerous small articles. In general, these blister packages comprise two principal layers, one being a plastic sheet having a depression or receptacle for receiving an article, and the other being a cover sheet of paper, polyester film and foil that seals the article within the plastic receptacle. Blister packages have been particularly useful in the pharmaceutical field for packaging unit dosages of capsules and tablets. Structures of this general type are disclosed in US. Pat. Nos. 3,054,503, 3,333,393 and 3,207,299. Until recently it has been the intention of the makers of such blister packages to provide easy means for gaining access to the medication therein. This has frequently been done by removing a portion of the relatively stiff plastic material at a corner of the package whereby only the backing or cover sheet remains. Thus, one could readily grip this corner of the cover sheet and peel it from the plastic material providing access to the contentsof thereceptacle.

However, the relatively easy access to medications in such blister packages has led to problems with respect to the accidental taking of such medication by children. This same problem hasbeen dealt with in the container medication.

or bottle field by providing safety closures for the con tainers whereby young children are generally unable to open them. Thus, whereas the manner of dealing with this problem of easy access to the contents of a bottle has primarily centered on providing a means for making it more difficult to remove the cap from the bottle,

it is apparent that a similar approach can be taken with respect to providing a means for makingit more difficult to remove the cover sheet from a blister package.

One such effort has been made by Dorsey Laborato ries, Division of Sandoz-Wander, lnc., Neb., whereby their unit-dose package utilizes a dual and separable layer cover sheet that seals each tablet'within its individual blister package receptacle; Thus, a two-step op eration is provided for removing the first or outer polyester film layer of the cover sheet, thereby leaving aluminum foil on the hack of the package with no exposed corner portions for peeling it off. The means for removing the medication then calls for the second step of pressing the tablet through the foil which is thereby ruptured.

5U M MARX .QFTHEUINXENIION.

Applicant has dealt with the above-mentioned matter by making modifications in the plastic receptacle as well as in the protective backing and yet enabling one to mass-produce such packages on conventional filling equipment presently in use for unit-dose packages. A blister receptacle is formed from a stiff, flexible sheet material with a flange extending about all sides of the opening in the receptacle. In an area between the receptacle and a leading edge of the flange, a transverse arched portion is provided which may be in the form of a pair of flutes. A cover sheet of conventional material such as light-weight and tearable plastic, paper and foil is affixed over the opening of the receptacle and is congruent with the perimeter of the flanges in a sealing relationship. This backing or cover sheet has a weakened and rupturable portion that is in spaced juxtaposition with the flanges ea insflgte. Ih s ysakened Portion may comprise conventional perforations. In order to obtain a medication that is sealed within the receptacle one need merely grip both flange ends of the blister package. This does not differ from the normal means of handling such a package. However, whereas in other cases one grabs an exposed portion of the cover sheet or would tend to flex the entire package, in this instance opening of the package is achieved by pulling opposite ends until the weakened or perforated portion of the cover sheet ruptures. Once this rupturing occurs one can readily grasp the exposed torn edge of the cover sheet that was directly in alignment with the leading flute and, consequently, not glued to the flange. The cover sheet may now be pulled off to obtain the BRIEF DESCRIPTION OF THE DRAWING thereof prior to DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawing, the illustrated blister package 11 comprises the preferred embodiment of my invention and includes a blister receptacle 13 formed from a stiff, flexible'sheet material having an open side 14. The material used is normallya transparent one which will reveal the contents therein and is generally of a plastic material that is sufficiently stiff to prevent tearing. Ten mil polyvinyl chloride sheet material is I suitable. The receptacle 13 may be made by normal thermoforming methods. An integral flange 16 extends about the perimeter of the open side 14 of the blister receptacle. Flange 16 is shown in. a rectangular form having sides 17, a back edge 18 and a front or leading edge 19. This particular configuration is not a limiting feature of my invention inasmuch as other configurations such as circular flanges or oval flanges may be used.

Between the leading edge 19 of the flange and the blister receptacle, atransverse arched portion 21 is provided which may be best'seen in FIG. 2. This arched i portion in the preferred embodiment comprises a pair of parallel flutes 22 and 23 extending across the entire width of the flange. Flutes-22 and 23 may be of substantially hemispherical configuration and are formed again from conventional thermoforming techniques simultaneous with the forming of the. blister receptcle 13.

These flutes are separated by a thin ridge 24 which likewise extends along the full width of the flange.

Cover sheet 25 may be of a thin sheet material which is preferably difficult to tear and resistant to puncturing. Thus, cover sheet 25-may comprise three layers of paper, polyester film and foil with the foil side being adjacent the blister receptacle and having a thin coating of an adhesive material for subsequent thermosealing" to the flange 16. This type of lamination makes the resulting cover sheet extremely resistant to puncturing or tearing and has been highly received in other types of conventional blister packages in views of its excellent vapor barrier which preserves the medication therein. As shown in FIGS. 1 and 3, this cover sheet has a weakened and rupturable portion which may comprise a series of spaced cuts 28 or perforations. It is noted that this weakened area is in spaced juxtaposition with the flanges transversely positioned arched portion 21, and preferably is enveloped by the leading flute 23.

Protective cover sheet 25 may be heat sealed to the plastic flange surrounding the blister receptacle by conventional heat pressure means. However, in performing this step one should take care to avoid the flattening of flutes 22 and 23. Thus, the female heat seal fixture, in addition to having a cavity for receiving the receptacle, may have a transverse cavity for receiving the arched portion 21. The second die is-of standard design and has a flat surface which presses the cover sheet to flange 16. The net result of such a heat-pressure technique is the adherence by a thermoadhesive of the flange surrounding the blister package to substantially all of the cover sheet. The one portion of the cover sheet that is not in adhesion with the flange is that which is directly spaced from the pair of raised flutes. The weakened portion is spaced from the leading flute 23. Ridge 24 between the flutes may be minimally adhered to the flange. Depending on the nature of the equipment that is available for adhering the cover sheet to flange l6, registry of perforations 28 with flute 23 may be difficult. Thus, the perforations may be made after adhesion to flange 16 by the use of a perforating roll that passes over the cover sheet spaced from flute 23.

With the package now sealed and containing a tablet or capsule it is relatively difficult for a young child to remove the medication therein. Ifthe child has become acquainted with conventional blister packages, he will attempt to peel off the protective cover, but inasmuch as no free corner portion is exposed for gripping he will be unable to accomplish this. The strength of the blister receptacle and the protective cover sheet that is attained from a proper selection of materials that are conventional in the art will prevent the child from readily smashing or puncturing the package. Likewise, he will have considerable difficulty in attempting to tear one of these materials.

The above-described construction is such that even an uninformed adult could initially have a difficult time in removing the medication from the blister package. However, this canbe achieved by a simple two-step, pull-peel method once the individual is able to comprehend the proper techniques. For the first step (FIGS. 4 and 5) the flanges leading edge 19 is pulled by gripping it and the back edge 18. Thus, as shown in FIG. 5, the weakened area of the protective cover sheet is severed along a line falling through the cuts or perforations 28. Simultaneous with this rupturing, ridge 24 will be separated from the cover sheet. This rupturing is caused by thte accordian-like action of the pair of flutes which will expand as the appropriate tensile force is applied in opposite directions on the two ends 18 and 19 of flange 16. As shown in FIG. 5, these flutes are in a temporarily depressed and lengthened condition and the cover sheet thereunder is fully separated along its width. Without these flutes or other type of archcd portion the tensile strength of flange 16 would prevent portion 28 of the cover sheet from rupturing.

The second step for removing a pill is to grasp the now exposed torn edge 30 of the cover sheet as shown in FIG. 6 and peel it off of the blister receptacle, thereby exposing open side 14 of the receptacle and permitting access to the tablet or capsule therein. Although perforations 28 could be positioned under flute 22 insted of flute 23, it would be more difficult to peel off the cover sheet since torn edge 30 would barely be extending from the flange. The exact dimensioning of the arched portion 21 and weakened area 28 of the cover sheet may vary depending upon the type of materials used. A primary consideration that is to be followed is to ascertain the appropriate amount of cover sheet that is to be removed or cut along the weakened area 28 in order to assure separation without requiring excessive force and yet resist separation by the small amount of force that achild might apply should he tend to pull. at each'end of the flange. Arched portion 21 must be ofa configuration that will permit it to expand when tensile force is applied to the flanges two ends. It has been found that although this requirement can be met by a single arc, or. a rectangular or triangular portion, least resistant to expansion occurs with two or more flutes.

I claim:

1. A child-resistant blister package comprising:

a blister receptacle formed from a stiff flexible sheet material and 'having'an open side for receiving articles therein;

a flange integrally extending about the open side of said blister receptacle;

said flange having a transverse expandable portion spaced between a leading edge of said flange and said blister receptacle; and

a cover sheet extending across the open side of said blister receptacle and adhering to said flange;

said cover sheet having a weakened and rupturable portion in juxtaposition with said flanges trans verse expandable portion serving to rupture upon pulling said flanges leading edge to stretch said flanges expandable portion to expose a ruptured edge of said cover sheet for peeling from said blister receptacle.

2. A child-resistant blister package in accordance with claim 1' in which said cover sheet coincides with the perimeter of said flange.

3. A child-resistant blister package in accordance with claim 1 in which said expandable portion extends across the entire width of said flange.

4. A child-resistant blisterpackage in accordance with claim 3 in which said cover sheets rupturable portion is spaced from said flanges transverse expandable portion. 7

5. A child-resistant blister package in accordance with claim 4 in which-said flanges expandable portion is an arched configuration.

6. A child-resistant blister package in accordance with claim 5 in which said flanges expandable portion is a pair of parallel flutes.

7. A child-resistant blister package in accordance with claim 6 in which said cover sheets rupturable portion is a line of spaced cuts in alignment with the lead- UNITED ssTATEs PATENT OFFICE CERTIF'ECATE OF CORRECTION WVENTURVJ duck ling er =5ciis0n It s :5,- fied {hat arm; appears m me above-identified patent and that said Letters Patent are hmehy gowscL-i shown b iaw' 1 11: .im I; Kine 2-, chm- 5: numeral "1" to id and sealed this 17th day of June 1.7575.

i C I IARSHALL DANE? .l'TI-T TZASON Commissioner 0;? Patents fattestinq Officer and Trademarks

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3054503 *Apr 6, 1961Sep 18, 1962Sparks CorpPush-out-blister package
US3207299 *Mar 4, 1964Sep 21, 1965George C SparksPackage for pills and like articles
US3255872 *Nov 17, 1959Jun 14, 1966Continental Can CoTwo compartment package
US3283885 *Jul 30, 1964Nov 8, 1966Schering AgPackage for medicament tablets and the like
US3380578 *May 22, 1967Apr 30, 1968George C. SparksStrip package assembly
US3809221 *Oct 10, 1972May 7, 1974N CompereRupturable blister pill package with safety backing
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4011949 *Jun 18, 1975Mar 15, 1977The Lehigh Press, Inc.Package construction for opening only by a predetermined procedure
US4243144 *Apr 9, 1979Jan 6, 1981Sterling Drug Inc.Bend and peel blister strip package
US4294361 *Dec 26, 1979Oct 13, 1981Sterling Drug, Inc.Push and peel blister strip packages
US4398635 *Jul 30, 1982Aug 16, 1983American Can CompanyChild-proof medication package
US4506789 *Jun 30, 1983Mar 26, 1985Packaging Coordinators, Inc.Child resistant package
US5613609 *Jan 6, 1995Mar 25, 1997The Procter & Gamble CompanyDual chamber-child resistant blister package
US5878888 *Sep 18, 1997Mar 9, 1999Mcneil-Ppc, Inc.Push through and peel child resistant blister package
US5894930 *Sep 18, 1997Apr 20, 1999Mcneil-Ppc, Inc.Directional push and peel easy to open child resistant blister package
US6029808 *Jan 29, 1999Feb 29, 2000Johnson & Johnson Vision Products, Inc.Primary package for contact lens
US6036016 *Apr 20, 1998Mar 14, 2000Pinnacle Intellectual Property Services, Inc.Blister package with easy tear blister
US6155423 *Apr 1, 1998Dec 5, 2000Cima Labs Inc.Blister package and packaged tablet
US6199698 *Dec 3, 1999Mar 13, 2001Alusuisse Technology & Management, Ltd.Pharmaceutical packaging with separation means
US6401926Aug 4, 2000Jun 11, 2002Pfizer Inc.Child-resistant blister package
US6409020Aug 4, 2000Jun 25, 2002Pfizer Inc.Child-resistant blister package
US6776285 *Jan 25, 2002Aug 17, 2004Daiwa Gravure Co., Ltd.Blister pack
US6974032 *Jul 30, 2003Dec 13, 2005Intini Thomas DBend and peel packaging having controllable delamination
US7000769May 20, 2004Feb 21, 2006Smithkline Beecham CorporationChild resistant blister packages utilizing walled structures enclosing medicament therein
US7165676 *Apr 19, 2002Jan 23, 2007Smurfit-Stone Container Enterprises, Inc.Heat seal blister package having improved moisture vapor transmission barrier and method for forming same
US7328802Dec 6, 2005Feb 12, 2008Smithkline Beecham CorporationChild resistant blister packages utilizing walled structures enclosing medicament therein
US7422125 *Dec 12, 2005Sep 9, 2008Ragnar WinbergBlister package
US7497331 *May 4, 2005Mar 3, 2009Duramed Pharmaceuticals, Inc.Child resistant package
US7845495Aug 14, 2006Dec 7, 2010Nosco, Inc.Product packaging system with lock release
US7866474 *Dec 16, 2005Jan 11, 2011Boehringer Ingelheim International GmbhFilm container
US7866475Jun 12, 2006Jan 11, 2011Mcneil-Ppc, Inc.Blister package
US8028837 *Dec 18, 2008Oct 4, 2011Kimberly-Clark Worldwide, Inc.Break-open package with shaped die cut for storing and dispensing substrates
US8051983Sep 10, 2005Nov 8, 2011Lts Lohmann Therapie-Systeme AgPeelable, child-resistant package for film-shaped drug forms
US8079475Jan 24, 2008Dec 20, 2011Sonoco Development, Inc.Blister package
US8151793Nov 5, 2010Apr 10, 2012Astrazeneca AbDevice and method for deaggregating powder
US8479729Dec 18, 2008Jul 9, 2013Astrazeneca AbDevice and method for deaggregating powder
US8485360Mar 4, 2011Jul 16, 2013Sands Innovations Pty, Ltd.Fracturable container
US8499936Mar 13, 2012Aug 6, 2013Nosco, Inc.Product packaging system with button lock release
US8511500Jun 7, 2010Aug 20, 2013Sands Innovations Pty. Ltd.Dispensing container
US8523016Dec 9, 2008Sep 3, 2013Sands Innovations Pty Ltd.Dispensing container
US8528736Oct 8, 2010Sep 10, 2013Sands Innovations Pty Ltd.Frangible container with hinge cover
US8578933Jul 1, 2009Nov 12, 2013Astrazeneca AbEntraining powder in an airflow
US20090158689 *Apr 28, 2007Jun 25, 2009Ronald HackbarthPouch-based cumulative packaging
US20100116772 *Jan 31, 2008May 13, 2010Sands Innovations Pty Ltd.dispensing utensil and manufacturing method therefor
US20110147260 *Aug 21, 2009Jun 23, 2011Amcor Flexibles Kreuzlingen LtdContainer with peelable lid with protection against unauthorized opening
DE102006022198B4 *May 12, 2006Aug 21, 2008Lts Lohmann Therapie-Systeme AgBeutel-Sammelpackung
EP0162291A1 *Apr 18, 1985Nov 27, 1985Teich AktiengesellschaftPackage for piece goods
EP0679587A1 *Apr 28, 1995Nov 2, 1995McNEIL-PPC, INC.Blister package containing gripping means
EP0709302A1 *Oct 27, 1995May 1, 1996Guy DupoyetPackage made of two pieces provided with a separation aid system
EP1841664A1 *Jan 25, 2005Oct 10, 2007Thomas D IntiniBend and peel packaging with pivot
EP1968868A1 *Dec 22, 2006Sep 17, 20083M Innovative Properties CompanyPackaging and method for making the same
WO1998036989A1 *Feb 9, 1998Aug 27, 1998Lohmann Therapie Syst LtsChild-proof peelable bag with sealable edges, method for producing same, and use
WO1999021777A1 *Sep 18, 1998May 6, 1999Becher FrankChild-proof pack for pressure-sensitive products which also have a comparatively large surface, such as transdermal therapy systems (tts)
WO1999054231A1 *Apr 20, 1999Oct 28, 1999Pinnacle Intellectual PropertyBlister package with easy tear blister
WO2006037424A1 *Sep 10, 2005Apr 13, 2006Lohmann Therapie Syst LtsPeelable child-resistant packaging for wafer pharmaceutical forms
WO2009102274A1 *Feb 11, 2009Aug 20, 2009Astrazeneca AbInhaler comprising a base having at least one sealed cavity containing medicament
WO2014004493A2Jun 25, 2013Jan 3, 2014R. J. Reynolds Tobacco CompanyDispensing container, packaged product assembly, and related method
Classifications
U.S. Classification206/532, 206/469, 229/245
International ClassificationB65D75/36, B65D75/32
Cooperative ClassificationB65D2575/3236, B65D75/326
European ClassificationB65D75/32D1