Claims
- 1. An overpressure valve for packaging containers, said overpressure valve includes a thin, flexible film membrane for disposal on an outer wall of a container to cover at least one hole through a wall of the container for release of any gases within said container, said membrane includes first and second opposite edge sections spaced by a central section, first and second adhesive strips adhering to said first and second edge sections of said membrane and affixed to said outer wall in opposite sides of said at least one hole through said wall with an adhesive-free zone between said adhesive strips which rests upon said outer wall of said container over said at least one hole and which is spaced from said outer wall of said container due to an overpressure in said container, each of said first and second adhesive strips include a thick portion along oppositely disposed edges of said membrane which extend across a width of said membrane with a very thin portion juxtaposed said central section, said first and second adhesive strips having an exposed surface which is in a plane with said central section.
- 2. An overpressure valve as set forth in claim 1, in which each of said first and second adhesive strips are wedge-shaped in cross section with pointed edges (18) along said central section, and a sloping surface of said wedge-shape is toward a surface of the membrane.
- 3. An overpressure valve as set forth in claim 1, in which each of said first and second adhesive strips have a rectangular portion along opposite edges of said membrane with a greatly inclined portion extending from said rectangular portion and sloping toward said central section and extending across the width of said membrane.
- 4. An overpressure valve as set forth in claim 1, in which each of said first and second adhesive strips include a rectangular portion along opposite edges of said membrane and spaced from a wedge shaped portion juxtaposed said central section across the width of said membrane.
- 5. An overpressure valve as set forth in claim 1, in which each of said first and second adhesive strips include a rectangular portion along opposite edges of said membrane and spaced from a small strand across the width of said membrane along the central section.
- 6. An overpressure valve as set forth in claim 1, in which each of said first and second adhesive strips include a solid filament (27) therein which extends along an outer edge of said membrane.
- 7. An overpressure valve as set forth in claim 1, in which said overpressure valve includes a base plate (31), said base plate has a central hole (32) therethrough, said overpressure valve is secured to an upper surface of said base plate with said central section in alignment with said central hole (32) and said base plate enclosed an adhesive over an entire bottom surface and is placed upon the outer wall of said container with the central hole surrounding the at least one hole.
- 8. An overpressure valve as set forth in claim 7, in which each of said first and second adhesive strips are wedge-shaped in cross section with pointed edges (18) along said central section, and a sloping surface of said wedge-shape is toward a surface of the membrane.
- 9. An overpressure valve as set forth in claim 7, in which each of said first and second adhesive strips have a rectangular portion along opposite edges of said membrane with a greatly inclined portion extending from said rectangular portion and sloping toward said central section and extending across the width of said membrane.
- 10. An overpressure valve as set forth in claim 7, in which each of said first and second adhesive strips include a rectangular portion along opposite edges of said membrane and spaced from a wedge shaped portion juxtaposed said central section across the width of said membrane.
- 11. An overpressure valve as set forth in claim 7, in which each of said first and second adhesive strips include a rectangular portion along opposite edges of said membrane and spaced from a small strand across the width of said membrane along the central section.
- 12. An overpressure valve as set forth in claim 7, in which each of said first and second adhesive strips include a solid filament (27) therein which extends along an outer edge of said membrane.
Priority Claims (2)
Number |
Date |
Country |
Kind |
4104803 |
Feb 1991 |
DEX |
|
4129838 |
Sep 1991 |
DEX |
|
Parent Case Info
This is a divisional of copending application Ser. No. 07/819,735, filed on Jan. 13, 1992, now U.S. Pat. No. 5,263,777.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0279073 |
Nov 1989 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
819735 |
Jan 1992 |
|