Claims
- 1. A package comprising a container and a pressure venting, side sealing closure,
- said container having a finish with an opening and a top seal area around said opening, said top seal area comprising an upwardly facing annular area at the top of the finish,
- said container also having a side seal area comprising an annular area extending downwardly and outwardly around said top seal area, said side seal area and said top seal area together having a width adequate for sealing meat products,
- said container having external thread means for securing said closure;
- said closure comprising,
- an annular shell having a top opening and a skirt with internal thread means for engaging the thread means of said container, said closure having a top lip which projects inwardly around said top opening,
- an insert disk contained in said shell beneath said top lip, said insert disk having a downwardly opening gasket channel with an annular band at the top and a downwardly and outwardly angulated side seal flange around said band,
- a gasket in said gasket channel, said gasket covering both said band and said flange and forming a seal with both said top seal area and said side seal area of said container,
- said top lip of said closure having an undersurface with at least one bearing area for engaging said band above said gasket channel,
- the said undersurface of said top lip also having at least one recessed area which does not bear on said disk, said recessed area permitting gas pressure in said container in excess of a predetermined limit to deflect the disk upwardly into said recessed area and away from said top seal area of said container sufficiently to release excess gas pressure.
- 2. The package of claim 1 wherein said container has a central axis and said side seal area of said container extends downwardly at an angle of about 5.degree. to 30.degree. to the said axis of said container.
- 3. A package comprising a container and a pressure venting, side sealing closure,
- said container having a finish with an opening and a top seal area round said opening, said top seal area comprising an upwardly facing annular area at the top of the finish,
- said container also having a side seal area comprising an annular area extending downwardly and outwardly from said top seal area, said side seal area and said top seal area together having a width adequate for sealing highly oxygen-sensitive food products,
- said container having external thread means for securing said closure;
- said closure comprising,
- an annular shell having a top opening and a skirt with internal thread means for engaging the thread means of said container, said closure having a top lip which projects inwardly around said top opening,
- a first type of insert disk contained in said shell beneath said top lip, said insert disk having a downwardly opening gasket channel having an annular band at the top and a downwardly and outwardly angulated side seal flange around said band,
- a gasket in said gasket channel, said gasket covering both said band and said flange and forming a seal with both said top seal area and said side seal area of said container,
- said closure adapted to alternatively receive a second type of insert disk, said second type of disk having a flowed-in gasket,
- the top seal area of said container being sufficiently wide that it will form a top seal with said second type of insert disk which top seal is effective for sealing relatively oxygen insensitive food products.
- 4. The package of claim 3 wherein said container has a central axis and said side seal area of said container extends downwardly at an angle of about 5.degree. to 30.degree. to the said axis of said container.
- 5. The package of claim 3 further wherein said top lip of said closure has an undersurface with at least one bearing area for engaging said first type of disk above said gasket channel,
- the said undersurface of said top lip also having at least one recessed area which does not bear on said first type of disk, said recessed area permitting gas pressure in said container in excess of a predetermined limit to deflect the disk upwardly into said recessed area and away from said top seal area of said container sufficiently to release excess gas pressure.
- 6. The package of claim 5 wherein said bearing area is positioned directly above said top seal area of said container.
- 7. The package of claim 5 wherein said bearing area extends across the width of said top lip.
- 8. The package of claim 5 wherein said bearing area is sized to bear on said first type of disk over less than about 20% of the area of the undersurface of said top lip.
- 9. The package of claim 5 wherein said recessed area is a channel which extends annularly around the undersurface of said top lip,
- said bearing area interrupting said channel.
- 10. The package of claim 5 further including an interthread space around said external thread means and between said skirt and said container, excess gas pressure being released past said gasket into said interthread space when said pressure deflects said disk into said recessed area.
- 11. The package of claim 3 wherein said second type of insert disk is the same as said first type, except for its said gasket.
- 12. The package of claim 3 wherein said gasket of said first type of disk is of a composition having a low oxygen permeability, and the gasket of said second type of disk is not.
- 13. The package of claim 3 wherein said top lip further includes a depending annular rib around said top lip, said rib engaging said disk.
- 14. The package of claim 13 wherein said rib is along an inner edge of said top lip.
RELATED CASES
This application is a continuation-in-part of my co-pending application Ser. No. 401,999, filed Sept. 1, 1989, now U.S. Pat. No. 4,993,572, and of my co-pending application Ser. No. 402,211, abandoned, also filed Sept. 1, 1989.
US Referenced Citations (12)
Foreign Referenced Citations (1)
Number |
Date |
Country |
779109 |
Feb 1968 |
CAX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
401999 |
Sep 1989 |
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