IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0565976
(1983-12-27)
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발명자
/ 주소 |
- Petersen, Jr., Benjamin R.
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출원인 / 주소 |
|
대리인 / 주소 |
Willian Brinks Olds Hofer Gilson & Lione Ltd.
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인용정보 |
피인용 횟수 :
14 인용 특허 :
6 |
초록
▼
A tamper resistant closure for screw top and other containers is provided which resists and visibly discloses attempted tampering. A heat shrinkable plastic sleeve including at least one row of longitudinal mechanical weakness, such as a line of perforations, snuggly surrounds both the screw cap and
A tamper resistant closure for screw top and other containers is provided which resists and visibly discloses attempted tampering. A heat shrinkable plastic sleeve including at least one row of longitudinal mechanical weakness, such as a line of perforations, snuggly surrounds both the screw cap and a portion of the neck of the associated container. Sharp protruding teeth integral to the covered portion of the container neck interfere with the longitudinal weak areas when the shrunk sleeving is forcibly rotated during an attempted tampering, causing a portion of the plastic material to rupture and indicating tampering. By providing a second row of longitudinal weakness, such as a second closely spaced parallel line of perforations, a tear-away portion results whereby the features which provide indication of tampering also provide a convenient means for desired removal of the protective sleeve by the intended user.
대표청구항
▼
1. A tamper resistant closure system, comprising: a container having a neck and a mouth defining an opening, the mouth having threading for engaging a screwable cap; at least one tooth projecting radially from said neck, said projecting tooth having a width which is narrow with respect to the ci
1. A tamper resistant closure system, comprising: a container having a neck and a mouth defining an opening, the mouth having threading for engaging a screwable cap; at least one tooth projecting radially from said neck, said projecting tooth having a width which is narrow with respect to the circumference of said neck; a screwable cap having threading for mating with the threading on the neck for capturing said cap in sealing relation to said mouth; a shrinkable plastic sleeve having at least one area of relative mechanical weakness, said sleeve tightly shrunk to engage said cap and said neck, and said area of relative weakness positioned on said neck such that when said cap is twisted in an opening direction, said sleeve and said area of relative weakness will twist toward said at least one tooth and said at least one tooth will tear a portion of the sleeve proximate to said area of relative weakness to provide evidence of tampering. 2. The invention of claim 1 wherein the at least one tooth forms a substantially right triangle with said neck defining one leg and wherein the longest leg of said substantially right triangle extends from the neck to a second leg which extends substantially perpendicular from the neck. 3. The invention of claim 1 wherein said area of relative mechanical weakness comprises a series of closely spaced perforations. 4. The invention of claim 3 wherein said series of closely spaced perforations form a line of perforations. 5. The invention of claim 3 wherein said series of closely spaced perforations forms a longitudinal line of perforations. 6. The invention of claim 3 wherein said series of perforations forms two substantially parallel closely spaced lines of perforations. 7. The invention of claim 1 wherein said area of relative mechanical weakness comprises one or more score lines of reduced sleeve thickness. 8. The invention of claim 7 wherein said one or more score lines comprise two substantially parallel closely spaced score lines. 9. A tamper resistant closure system, which comprises: a container having a hollow neck with a mouth at an upper end of the neck, the mouth defining an opening for filing and emptying the container; a plurality of teeth spaced around the periphery of the neck, and extending radially therefrom such that the circumferential distance between said teeth is greater than the width of said teeth; a thread on the mouth for engaging and capturing a mating thread on a cap; a cap having a disc-shaped top portion and an annular skirt depending therefrom, said annular skirt including along an inside wall a thread for mating with the thread on said neck; a sleeve of shrinkable plastic, said sleeve including at least one longitudinal line of relative mechanical weakness, said sleeve tightly shrunk around said cap and said neck to cover said annular skirt and said plurality of teeth, said line of relative weakness positioned such that when twisting forces are applied to the sleeve and the cap in an opening direction past at least one of the plurality of teeth, the tooth will tear the sleeve proximate to said line of relative weakness to provide evidence of tampering. 10. The invention of claim 9 wherein said plurality of teeth includes at least two pairs of closely spaced teeth. 11. The invention of claim 9 wherein the first pair of closely spaced teeth is located on one side of the container and the second pair of closely spaced teeth is located on an opposite side of the container. 12. The invention of claim 9 wherein said at least one longitudinal line of relative mechanical weakness comprises a series of closely spaced perforations. 13. The invention of claim 12 wherein said sleeve includes two approximately parallel lines of closely spaced perforations which define an opening tab to facilitate removal of the sleeve. 14. The invention of claim 12 wherein said cap further includes a pouring spout. 15. The invention of claim 9 wherein said sleeve further includes at least a first and a second longitudinal line of relative mechanical weakness substantially parallel and adjacent to one another, said sleeve also having an extended portion at one end of the sleeve between the two lines of relative weakness defining a tab, said two lines of relative weakness defining a tear-away portion to facilitate removal of the sleeve, and said tab providing a starting point for peeling said tear-away portion from said sleeve. 16. The invention of claim 15 wherein said first and second lines of relative mechanical weakness comprise lines of closely spaced perforations. 17. The invention of claim 15 wherein said first and second lines of relative mechanical weakness comprise score lines of reduced sleeve thickness. 18. The invention of claim 9 wherein said at least one longitudinal line of relative mechanical weakness comprises one or more score lines of reduced sleeve thickness. 19. A container for tamper resistant closure system, which comprises: a hollow body for containing a substance; a hollow neck extending upwardly from the body, the neck having at one end a generally cylindrical mouth defining a circular opening for introducing or emptying the substance to the hollow body of the container; the neck including at least two pairs of teeth placed on opposite sides of the neck adjacent the mouth, each tooth having a substantially right triangular shape with the longest side of the triangle extending between a first point on the neck and a leg which extends substantially perpendicularly from the neck at a second point on the neck below said first point, said teeth for engaging a sleeve of shrinkable plastic having a pair of closely spaced, substantially parallel lines of longitudinal perforations and for severing said sleeve along at least one of said lines of longitudinal perforations when said sleeve is twisted; said teeth having a width which is less than the circumferential distance between said at least two pairs of teeth. 20. A tamper resistant closure system, comprising: a container having a hollow body, a hollow neck upwardly extending therefrom, the neck having a generally cylindrical mouth at an upper end thereof defining a substantially circular opening to introduce or remove a substance from the container; a thread on the mouth for capturing a mating thread on a cap in closing relation; a first pair of teeth positioned on the neck below the mouth on one side of the container, each tooth having a substantially right triangular shape with the longest side of the triangle extending between a first point on the neck and a leg which extends substantially perpendicularly from the neck at a second point on the neck below said first point; a second pair of teeth positioned on the neck below the mouth on the opposite side of the container from said first pair of teeth, each tooth having a substantially right triangular shape with the longest side of the triangle extending between a second point on the opposite side of the neck and a leg which extends substantially perpendicular from the neck at a point below said second point; said teeth having a width which is less than the circumferential distance between said first and second pairs of teeth; a cap having a generally circular disc-shaped top portion and an annular shirt depending therefrom, said skirt including on an inner surface thereof a thread for mating with the thread on the mouth to capture the cap in sealing relation with the mouth; a sleeve of heat shrinkable thermoplastic material, said sleeve having a pair of closely spaced, substantially parallel lines of perforations extending from end to end along a longitudinal axis of said sleeve, said lines of perforations defining a tear-away portion to facilitate removal of said sleeve and having an opening tab between said two lines of perforations to facilitate removal of the sleeve; said sleeve tightly shrunk around the annular wall of the cap and the teeth on the neck of the container to grip said teeth and said annular wall, and positioned with the lines of perforations substantially adjacent said teeth such that when said cap and said sleeve are twisted in an opening direction, said lines of perforations move toward said teeth and said teeth tear said sleeve between at least two adjacent perforations in one of said lines to provide evidence of tampering.
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