CA1097260A - Plastic cap for bottle - Google Patents
Plastic cap for bottleInfo
- Publication number
- CA1097260A CA1097260A CA297,639A CA297639A CA1097260A CA 1097260 A CA1097260 A CA 1097260A CA 297639 A CA297639 A CA 297639A CA 1097260 A CA1097260 A CA 1097260A
- Authority
- CA
- Canada
- Prior art keywords
- cap
- outer skirt
- neck
- tab
- score line
- 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
Links
Landscapes
- Closures For Containers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The cap of the present invention has a top disk which fits on the end of the neck of a bottle and a thin-walled outer skirt formed with a pair of circumferential beads which fit against mating portions of the bottle neck. A pair of parallel, circum-ferential internal score lines, defining a weakened cylindrical band, are formed in the outer skirt between the circumferential beads find in proximity to an integral tear tab. By pulling on the tab, the band is torn out of the outer skirt, permitting the paper portion of the cap above the band to be pulled off the neck. This upper portion can be replaced for reclosure purposes. Preferably, the cap is formed with an integral, smaller diameter "corking" skirt which fits inside the bottle neck.
The cap of the present invention has a top disk which fits on the end of the neck of a bottle and a thin-walled outer skirt formed with a pair of circumferential beads which fit against mating portions of the bottle neck. A pair of parallel, circum-ferential internal score lines, defining a weakened cylindrical band, are formed in the outer skirt between the circumferential beads find in proximity to an integral tear tab. By pulling on the tab, the band is torn out of the outer skirt, permitting the paper portion of the cap above the band to be pulled off the neck. This upper portion can be replaced for reclosure purposes. Preferably, the cap is formed with an integral, smaller diameter "corking" skirt which fits inside the bottle neck.
Description
~$~
This invention rela-tes to a new improved derormable plastic cap for bottles and to the combination of bottle and cap.
One usc for the present invention is to seal a wine boktle, ~ !
although the cap ~ay be used to seal other types Or bottles.
Heretofore, wine bottles have generally been sealed with cork forced into the bottle neck~ Tho present invention i9 a replacement ~or such cork.
An advantage of the invention is the fact that the seal is very tight in that the locations of sealing are not on~ the inside of the neck but also the upper edge or fini4h o~ the neck and the exterior Or the neck. Hence the sealing against lea~age of contents and ingress of air is improved over conventional bottle caps and closures.
;~ A further feature of the invention is the fact that the ~ cap may be easily installed on the bottle neck by automatic :
machiner~. ~
Further, the cap may be removed merely by pulling-a~fin8er tab, tearing from a portion o~ the outer skirt a weakened band, ~ which reduces the friction between the cap and the bottle neck and permits manua1 removal, Still another feature of the invention is the ~act that the cap after being torn results in a residual reclosure cap which ma~ be used repreatedly. When the reclosure cap is in place, the bottle is protected to a oertain extent against in-gre~ss o~ air and also is protected against leakage of the ~; contents.
A still further fsature of the invention is the fact that the outer skirt of the cap when intact pre~ents removal of the cap, and hence prevents tampering with the contents. On khe other hand~ once the weakened band is removed the purchaser can detect the fact that the contents o~ the bottle have been subject to tampering.
7~:6~
Accordingly the invention provides a thin walled, flexible plastic cap for ~losing a wine bottle having A neck formed with an annular finish at the upper end of said neck, the outside of said neck shaped with a short, cylindrical outside upper surface below said finish, a first bead below said upper surface and an elongated cyl:indrical outside lower surface below said first bead, said upper and lower surfaces being of about the same diameter, said neck being formed with a cylindrical inner surface below said finish; said cap be-ing deformable to stretch over said bead, said cap comprisinga top disc having a diameter about equal to said finish, a thin walled outer skirt depending from said disc, said outer :
skirt having a top portion shaped to fit tightly around said upper surface, a pair of internal beads shaped to fit tlghtly around the edges of said first ~ead, a bottom portion shaped : to fit around at least a portion of said lower surface and a ,, : pull tab depending below said pair of beads, vertically spaced apart upper and lower score lines being located between said pair of beads which weaken said outer skirt when said tab ls pulled so that a circumferential band may be torn off between said score lines, permitting removal of the portion of said cap above said upper score line.
; ' .~ :
This invention rela-tes to a new improved derormable plastic cap for bottles and to the combination of bottle and cap.
One usc for the present invention is to seal a wine boktle, ~ !
although the cap ~ay be used to seal other types Or bottles.
Heretofore, wine bottles have generally been sealed with cork forced into the bottle neck~ Tho present invention i9 a replacement ~or such cork.
An advantage of the invention is the fact that the seal is very tight in that the locations of sealing are not on~ the inside of the neck but also the upper edge or fini4h o~ the neck and the exterior Or the neck. Hence the sealing against lea~age of contents and ingress of air is improved over conventional bottle caps and closures.
;~ A further feature of the invention is the fact that the ~ cap may be easily installed on the bottle neck by automatic :
machiner~. ~
Further, the cap may be removed merely by pulling-a~fin8er tab, tearing from a portion o~ the outer skirt a weakened band, ~ which reduces the friction between the cap and the bottle neck and permits manua1 removal, Still another feature of the invention is the ~act that the cap after being torn results in a residual reclosure cap which ma~ be used repreatedly. When the reclosure cap is in place, the bottle is protected to a oertain extent against in-gre~ss o~ air and also is protected against leakage of the ~; contents.
A still further fsature of the invention is the fact that the outer skirt of the cap when intact pre~ents removal of the cap, and hence prevents tampering with the contents. On khe other hand~ once the weakened band is removed the purchaser can detect the fact that the contents o~ the bottle have been subject to tampering.
7~:6~
Accordingly the invention provides a thin walled, flexible plastic cap for ~losing a wine bottle having A neck formed with an annular finish at the upper end of said neck, the outside of said neck shaped with a short, cylindrical outside upper surface below said finish, a first bead below said upper surface and an elongated cyl:indrical outside lower surface below said first bead, said upper and lower surfaces being of about the same diameter, said neck being formed with a cylindrical inner surface below said finish; said cap be-ing deformable to stretch over said bead, said cap comprisinga top disc having a diameter about equal to said finish, a thin walled outer skirt depending from said disc, said outer :
skirt having a top portion shaped to fit tightly around said upper surface, a pair of internal beads shaped to fit tlghtly around the edges of said first ~ead, a bottom portion shaped : to fit around at least a portion of said lower surface and a ,, : pull tab depending below said pair of beads, vertically spaced apart upper and lower score lines being located between said pair of beads which weaken said outer skirt when said tab ls pulled so that a circumferential band may be torn off between said score lines, permitting removal of the portion of said cap above said upper score line.
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7;~60 i Other obJects of the present invent,ion will beoome apparent upon reading the following specification and referring to the `~ accompanying drawing in which similar characters of reference represent corresponding parts in each of the several views.
In the drawings:
Fig~ 1 is an exploded side~elevational view partly broken away to reveal internal construction of a Cflp and bottle~
Fig~ 2 is a view similar to Fig. 1 showing the cap and bottle assambled and also showing the weakened band partiaLl~
torn away.
Fig. 3 is~a sectional viaw tak3n substantially along the line 3--3 of Fig. 1 prior to removal of the weakened band.
Fig. 4 is a view similar to Fig. 3 showing the weakened band removed and the use of the upper portlon of the cap as a reclosure capO
The present invention~provides a cap 11 for a conventional bottle neck 12, here shown a~a wine bottle. ~The cap is so formed that a weakened band 13 may be manually removed from the cap 113 permitting the upper portion of the cap to be pulled off the neclc and constituting a reclosure cap ll~ for reclosure ` purpo~es.
The bottle neck 12 hfls a lip or finish 16 at its t~op, Where the cap is used on a wine bottle, the neck 12 is ~ormed with an external) approxi~atel~ re~ctangular c~oss section bead 17 spaced downward from~the finish 16. The inside of neck 12 is appro~imately oylindrical.
Cap 11 fits tightly on the upper porti~on of neok 12. For such purpose9 it is formed with~a ~top disk Zl preferabl~ flat both inside and out~ Extending below top disk 21 is a peripher-al top portion ~2 of the outer skirtO Top portion 22 h~s Iengthabout equal to the height of neck 12 above bead 17. Be1ow top portion 22 are a pair o:~ circumferential beads 19~ 20 having inside dia~neters to ;~it tightly against the indentations at the top and bottom edg0s of bead 17. Below bead 20 is the bottom 21 o~ the outer sk.;rt.
The thin-walled outer skirt consisting of the portions 22 23 and 24 fits snugly against the outside of the neck l2; and when intact, the cap cannot be removed from the bottle and hence the possibility o~ tampering with the contents is prevented. It i9 al50 appflrent that there is a liquid type seal between the inside o~ the top disk 21 and the .~inish 16 and also between the exterior of the neck 12 and the bead 17 thereo~ and the interior of the outer skirt and~particularly beads 19, 20 of the cap.
The ingress of air is prevented by the sealing surfflces~
Two circum~erential vertically ~paced ap~t internal score lines, namely~ upper line 26 and lower line 27 are pre~erably ~ormed in skirt section 23 between beads 19~ 20~ and ~orm;weak ened band 13. A gap 28 o~ a short arcuate d1stance cab be : ;~ ;
~ormed into the lower line 27. Immediately below gap 28~is an integral tear tab 31 ~ormed~on the exterior Or lower skirt por-tion 24~ A ~irst internal curved score:line 36 on skîrt portion 23 extends ~rom the upper ri~ght corner (as viewed in Figo 1) of tab 31 generall~ upward and to the left until it merges with upper circumferential score line 26. Similarly9 a second, :~
shor~er radius,:interna1 curvad score line 37 extends from the: . ~. ~
upper left corner of tab 31 ganerall~ upward and to the le~t ; ~ ~.
until it merges with lower oircum~erential score line 27. Below the level o~ lower ~core line 27 the s~irt section 23 is thinned area 38 immediat~ely under the upper end of tear tab 31. To pre- :~
vent the tab 31 ~rom being torn apart~ lt is pre~erably formed with fl rainrorcement 32 angling upwardly to the band 13.
:~ 30 In the pre.ferred embodlment of the invention i1lustrated in khe accompanying drawings there is an inner or "corking" skirt 34 depending from disk 21 and ~itting tlghtly against the inside surface 18 o~ the neck 12. This skirt 34 augments the seali.ng 1~
i{~a~O~o o~ the CMP 11. and further facilltates the pos:itioning of the reclosure CflP 14.
~ ap 11 may be installed on khe neck 12 b~ automatic capping machineryO ~or such purpose, the portion of neck 12 above boad 17 slanks slightly downwa.rdly~outwardl~ as best shown in Fig. lo This portion ~its inside the lower edge o~ lower skirt portion 2L~ Downward pressure applied to top disk 21 stretches the skirt 2l~ oukwardly. The lower edge o~ inner ~kirt 31~ SIA1PS
inside neck 12. When cap 11 is seated~ there is a sealing ~; 10 between the inner skirt 3LL and the inside 18 o~ the neck 12, also between the finish 16 and the underside of the top disk 21 and also of the exterior of neck 12 with the portions 22, 23, 24 and particularly beads 19~ 20. When intact, the cap 11 cannot be removed by any ordinary means, When it is decided to open the bottle~ the user gr~sps the tab 31 and pulls upward and toward the left as viewed in Fig~
: and 2. As the tab 31 is lifted and pulled: the thinned area 38 ~ ~ractures, permitting the ta~ to be torn upward. Skirt portion ; ~ 23 tears along cu.rved lines 36, 37. The tear at line 36 ~erees : 20 with line 26 and:the tear at line 37 merges with line 27.
Further pulling on tab 31 tears Iines 26 and 27 around the cap.
: B~ thus continuing to pull on the tab~31 around the bottLe, the . .
: : entire band 13 between lines;2~ and 27 is removed.
~ The user pries the oap from the bottle neck, One means for ;: removing:the cap is by the ~ingers grippine the under~ide of the reclosure cap 14 shown in Fig. 40 In the condltion of Fig. 4 the resistance to the removal of the reclosure cap 14 is consid-~: erably less than to the csp Ll because a Lesser sur~acs area~of -~ contact between the skirt and the neck re~ains and also because the Lower portion 24 below the baad 17 has been disconnected from the reclosure cap lL~ and the shoulder on the lower side Or the bead 17 no longer prevents upward pulling of the cap 14, ~ :
~
After a portion Or the contents o~ th~ bottle has been dispensed~ it i9 possible to use the reclosure cap lL~. The inner slci.rt 31~ ~uides the reclosure cap lL~ in place as the inner skirt 31~ is lnserted inside the surface 1~ o:~ neck 12 and a downward manual .~orce on disk 21 causes the cap to seat into the position.
Although only one spec:i~ic en~odiment of the invention ha~ been described~ it is understood that chan~es and modiri-cations can be made without departi.ng ~rom the spirit thereo~, as set forth in the following claims.
' ~ .
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.
7;~60 i Other obJects of the present invent,ion will beoome apparent upon reading the following specification and referring to the `~ accompanying drawing in which similar characters of reference represent corresponding parts in each of the several views.
In the drawings:
Fig~ 1 is an exploded side~elevational view partly broken away to reveal internal construction of a Cflp and bottle~
Fig~ 2 is a view similar to Fig. 1 showing the cap and bottle assambled and also showing the weakened band partiaLl~
torn away.
Fig. 3 is~a sectional viaw tak3n substantially along the line 3--3 of Fig. 1 prior to removal of the weakened band.
Fig. 4 is a view similar to Fig. 3 showing the weakened band removed and the use of the upper portlon of the cap as a reclosure capO
The present invention~provides a cap 11 for a conventional bottle neck 12, here shown a~a wine bottle. ~The cap is so formed that a weakened band 13 may be manually removed from the cap 113 permitting the upper portion of the cap to be pulled off the neclc and constituting a reclosure cap ll~ for reclosure ` purpo~es.
The bottle neck 12 hfls a lip or finish 16 at its t~op, Where the cap is used on a wine bottle, the neck 12 is ~ormed with an external) approxi~atel~ re~ctangular c~oss section bead 17 spaced downward from~the finish 16. The inside of neck 12 is appro~imately oylindrical.
Cap 11 fits tightly on the upper porti~on of neok 12. For such purpose9 it is formed with~a ~top disk Zl preferabl~ flat both inside and out~ Extending below top disk 21 is a peripher-al top portion ~2 of the outer skirtO Top portion 22 h~s Iengthabout equal to the height of neck 12 above bead 17. Be1ow top portion 22 are a pair o:~ circumferential beads 19~ 20 having inside dia~neters to ;~it tightly against the indentations at the top and bottom edg0s of bead 17. Below bead 20 is the bottom 21 o~ the outer sk.;rt.
The thin-walled outer skirt consisting of the portions 22 23 and 24 fits snugly against the outside of the neck l2; and when intact, the cap cannot be removed from the bottle and hence the possibility o~ tampering with the contents is prevented. It i9 al50 appflrent that there is a liquid type seal between the inside o~ the top disk 21 and the .~inish 16 and also between the exterior of the neck 12 and the bead 17 thereo~ and the interior of the outer skirt and~particularly beads 19, 20 of the cap.
The ingress of air is prevented by the sealing surfflces~
Two circum~erential vertically ~paced ap~t internal score lines, namely~ upper line 26 and lower line 27 are pre~erably ~ormed in skirt section 23 between beads 19~ 20~ and ~orm;weak ened band 13. A gap 28 o~ a short arcuate d1stance cab be : ;~ ;
~ormed into the lower line 27. Immediately below gap 28~is an integral tear tab 31 ~ormed~on the exterior Or lower skirt por-tion 24~ A ~irst internal curved score:line 36 on skîrt portion 23 extends ~rom the upper ri~ght corner (as viewed in Figo 1) of tab 31 generall~ upward and to the left until it merges with upper circumferential score line 26. Similarly9 a second, :~
shor~er radius,:interna1 curvad score line 37 extends from the: . ~. ~
upper left corner of tab 31 ganerall~ upward and to the le~t ; ~ ~.
until it merges with lower oircum~erential score line 27. Below the level o~ lower ~core line 27 the s~irt section 23 is thinned area 38 immediat~ely under the upper end of tear tab 31. To pre- :~
vent the tab 31 ~rom being torn apart~ lt is pre~erably formed with fl rainrorcement 32 angling upwardly to the band 13.
:~ 30 In the pre.ferred embodlment of the invention i1lustrated in khe accompanying drawings there is an inner or "corking" skirt 34 depending from disk 21 and ~itting tlghtly against the inside surface 18 o~ the neck 12. This skirt 34 augments the seali.ng 1~
i{~a~O~o o~ the CMP 11. and further facilltates the pos:itioning of the reclosure CflP 14.
~ ap 11 may be installed on khe neck 12 b~ automatic capping machineryO ~or such purpose, the portion of neck 12 above boad 17 slanks slightly downwa.rdly~outwardl~ as best shown in Fig. lo This portion ~its inside the lower edge o~ lower skirt portion 2L~ Downward pressure applied to top disk 21 stretches the skirt 2l~ oukwardly. The lower edge o~ inner ~kirt 31~ SIA1PS
inside neck 12. When cap 11 is seated~ there is a sealing ~; 10 between the inner skirt 3LL and the inside 18 o~ the neck 12, also between the finish 16 and the underside of the top disk 21 and also of the exterior of neck 12 with the portions 22, 23, 24 and particularly beads 19~ 20. When intact, the cap 11 cannot be removed by any ordinary means, When it is decided to open the bottle~ the user gr~sps the tab 31 and pulls upward and toward the left as viewed in Fig~
: and 2. As the tab 31 is lifted and pulled: the thinned area 38 ~ ~ractures, permitting the ta~ to be torn upward. Skirt portion ; ~ 23 tears along cu.rved lines 36, 37. The tear at line 36 ~erees : 20 with line 26 and:the tear at line 37 merges with line 27.
Further pulling on tab 31 tears Iines 26 and 27 around the cap.
: B~ thus continuing to pull on the tab~31 around the bottLe, the . .
: : entire band 13 between lines;2~ and 27 is removed.
~ The user pries the oap from the bottle neck, One means for ;: removing:the cap is by the ~ingers grippine the under~ide of the reclosure cap 14 shown in Fig. 40 In the condltion of Fig. 4 the resistance to the removal of the reclosure cap 14 is consid-~: erably less than to the csp Ll because a Lesser sur~acs area~of -~ contact between the skirt and the neck re~ains and also because the Lower portion 24 below the baad 17 has been disconnected from the reclosure cap lL~ and the shoulder on the lower side Or the bead 17 no longer prevents upward pulling of the cap 14, ~ :
~
After a portion Or the contents o~ th~ bottle has been dispensed~ it i9 possible to use the reclosure cap lL~. The inner slci.rt 31~ ~uides the reclosure cap lL~ in place as the inner skirt 31~ is lnserted inside the surface 1~ o:~ neck 12 and a downward manual .~orce on disk 21 causes the cap to seat into the position.
Although only one spec:i~ic en~odiment of the invention ha~ been described~ it is understood that chan~es and modiri-cations can be made without departi.ng ~rom the spirit thereo~, as set forth in the following claims.
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Claims (10)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In combination a wine bottle having a neck formed with an annular finish at the upper end of said neck, the outside of said neck shaped with a short, cylindrical outside upper surface below said finish, a first bead below said upper surface and an elongated cylindrical outside lower surface below said first bead, said upper and lower surfaces being of about the same diameter, said neck being formed with a cylindrical inner sur-face below said finish and a thin-walled, flexible plastic cap for closing said bottle, said cap being deformable to stretch over said bead, said cap comprising a top disk having a diameter about equal to said finish, a thin walled outer skirt depending from said disk, said outer skirt having a top portion shaped to fit tightly around said upper surface a pair of internal beands, shaped to fit tightly around the edges of said first bead, a bottom portion shaped to fit around at least a portion of said lower surface and a pull tab depending below said pair of in-ternal beads, vertically spaced apart upper and lower score lines being located between said pair of internal beads which weaken said outer skirt when said tab is pulled so that a circumferen-tial band may be torn off between said score lines, permitting removal of the portion of said cap above said upper score line.
2. The combination of claim 1 in which said lower score line is interrupted for a short arcuate length and said tab is located adjacent the interrupted portion of said lower score line.
3. The combination of claim 2 in which said tab is molded integral with said cap.
4. The combination of claim 1 which further comprises an inner corking skirt depending from said disk dimensioned to fit tightly inside said inner surface of said neck.
5. A thin-walled, flexible plastic cap for closing a wine bottle having a neck formed with an annular finish at the upper end of said neck, the outside of said neck shaped with a short, cylindrical outside upper surface below said finish, a first bead below said upper surface and an elongated cylindrical out-side lower surface below said first bead, said upper and lower surfaces being of about the same diameter, said neck being formed with a cylindrical inner surface below said finish; said cap being deformable to stretch over said bead, said cap comprising a top disk having a diameter about equal to said finish, a thin-walled outer skirt depending from said disk, said outer skirt having a top portion shaped to fit tightly around said upper surface, a pair of internal beads shaped to fit tightly around the edges of said first bead, a bottom portion shaped to fit around at least a portion of said lower surface and a pull tab depending below said pair of beads, vertically spaced apart upper and lower score lines being located between said pair of beads which weaken said outer skirt when said tab is pulled to that a circumferential band may be torn off between said score lines, permitting removal of the portion of said cap above said upper score line.
6. A cap according to claim 5 in which said lower score line is interrupted for a short arcuate length and said tab is located immediately below the interrupted portion of said lower score line.
7. A cap according to claim 6 in which said tab is molded integral with said cap.
8. A cap according to Claim 5 in which said score lines are internal.
9. A cap according to Claim 5 which further com-prises an inner corking skirt depending from said disc dimensioned to fit tightly inside said inner surface.
10. A deformable plastic cap comprising:
(1) a top disc (2) a sylindrical thin walled outer skirt integrally attached to and extending substantially perpendicularly from said disc; and (3) a cylindrical inner skirt integrally. attached to and substantially perpendicular to said disc positioned inward and enclosed within said outer skirt and substantially coaxial therewith and extending for a shorter distance than said outer skirt; said outer skirt scored and weakened along a substantially circumferential first score line downwardly spaced from said disc, and scored and weakened along a sub-stantially circumferential second score line spaced downwardly from said first score line to form a weakened cylindrical band within said outer skirt, a tab attached to said cylindri-cal band and extending from said band and outwardly from said outer skirt, a weakened area extending between said first score line and said second score line immediately adjacent said tab, said outer skirt being imperforate except in said weakened area, the portion of said cap above said band not being detachable from the portion of said outer skirt below said band except when said band has been torn off said outer skirt, and integral narrow bead means extending circumferen-tally around the inside of said outer skirt above said second score line.
(1) a top disc (2) a sylindrical thin walled outer skirt integrally attached to and extending substantially perpendicularly from said disc; and (3) a cylindrical inner skirt integrally. attached to and substantially perpendicular to said disc positioned inward and enclosed within said outer skirt and substantially coaxial therewith and extending for a shorter distance than said outer skirt; said outer skirt scored and weakened along a substantially circumferential first score line downwardly spaced from said disc, and scored and weakened along a sub-stantially circumferential second score line spaced downwardly from said first score line to form a weakened cylindrical band within said outer skirt, a tab attached to said cylindri-cal band and extending from said band and outwardly from said outer skirt, a weakened area extending between said first score line and said second score line immediately adjacent said tab, said outer skirt being imperforate except in said weakened area, the portion of said cap above said band not being detachable from the portion of said outer skirt below said band except when said band has been torn off said outer skirt, and integral narrow bead means extending circumferen-tally around the inside of said outer skirt above said second score line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA297,639A CA1097260A (en) | 1978-02-23 | 1978-02-23 | Plastic cap for bottle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA297,639A CA1097260A (en) | 1978-02-23 | 1978-02-23 | Plastic cap for bottle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1097260A true CA1097260A (en) | 1981-03-10 |
Family
ID=4110853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA297,639A Expired CA1097260A (en) | 1978-02-23 | 1978-02-23 | Plastic cap for bottle |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1097260A (en) |
-
1978
- 1978-02-23 CA CA297,639A patent/CA1097260A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |