초록

A closure device for a thermoplastic bag which includes two opposing, longitudinally extending interlockable male and female fastening strips having respective male and female closure elements or profiles with outside wings that are deformed when the closure device is fully occluded.

대표청구항 ▼

1. A closure device for a reclosable plastic bag comprising first and second interlocking fastening strips arranged to be interlocked over a predetermined length, wherein the first fastening strip including a first interlocking member and a third interlocking member and further including a first fle

1. A closure device for a reclosable plastic bag comprising first and second interlocking fastening strips arranged to be interlocked over a predetermined length, wherein the first fastening strip including a first interlocking member and a third interlocking member and further including a first flexible wing adjacent the first interlocking member and extending from the first fastening strip beyond the height of the first interlocking member and a third wing adjacent the third interlocking member and extending below the height of the third interlocking member; the second fastening strip including a second interlocking member for mating with the first interlocking member and a fourth interlocking member for mating with the third interlocking member, the second fastening strip further including a second flexible wing adjacent the second interlocking member and extending from the second fastening strip beyond the height of the second interlocking member and a fourth wing adjacent the fourth interlocking member and extending below the height of the fourth interlocking member; whereby the first wing engages with the second wing when the first and second fastening strips interlock, the third interlocking member interlocks with the fourth interlocking member before the first interlocking member interlocks with the second interlocking member, and the third wing does not engage with the fourth wing when the first and second fastening strips interlock. 2. The invention as in claim 1, wherein the third wing aligns opposite to the fourth wing and does not touch the forth wing when the first and second fastening strips interlock. 3. The invention as in claim 1, wherein the first and second wings are located on the outermost portions of the first and second fastening strips. 4. The invention as in claim 3, wherein first and second wings are located on the innermost side of the closure device located nearest to the closed bottom end portion of the bag. 5. The invention as in claim 1, wherein the first fastening strip contains a notch between the first interlocking member and the first wing. 6. A resealable closure mechanism having an elongate substantially constant profile extending between a first end and a second end, the profile comprising: a first closure element having a first interlocking member, a third interlocking member, and a first wing member on the outermost portion of the first closure element adjacent to the first interlocking member, each protruding from a first base member; anda second closure element having a second interlocking member, a fourth interlocking member and a second wing member on the outermost portion of the first closure element adjacent to the second interlocking member, each protruding from a second base member;wherein the first interlocking member is resealably interlocked with the second interlocking member and the third interlocking member is resealably interlocked with the fourth interlocking member; wherein the first and second wings are engaged and resealably deformed when the closure mechanism is closed and wherein the engagement of the first and second wings cause the first closure element and the second closure element to pivot so that the third interlocking member engages the forth interlocking member before the first interlocking member engages the third interlocking member. 7. The invention as in claim 6, wherein the first closure element has a third wing adjacent the third interlocking member and extending below the height of the third interlocking member, the second closure element has a fourth wing adjacent the fourth interlocking member and extending below the height of the fourth interlocking member, and the third wing does not engage with the fourth wing when the first and second fastening strips interlock. 8. The invention as in claim 6, wherein the first wing member extends from the first closure element beyond the height of the first interlocking member and the second wing member extends from the second closure element beyond the height of the second interlocking member. 9. The invention as in claim 6, wherein the first wing member extends from the first closure element up to or beyond the height of the first interlocking member and the first closure element includes a third wing member at the opposite end of the closure element from the first wing where the first wing member has greater height than the third wing member. 10. The closure mechanism of claim 6, wherein each of the first and third interlocking members comprises a pair of arms forming a channel-shaped female interlocking member, and wherein each of the second and fourth interlocking members comprises an arrow-shaped male interlocking member. 11. The closure mechanism of claim 6, wherein the first closure element has a first sealing member protruding from the first base member and disposed between the first interlocking member and the third interlocking member; and the second closure element has a second sealing member protruding from the second base member and disposed between the second interlocking member and the fourth interlocking member, and, wherein the second sealing member forms a generally V-shaped tapered channel; wherein the first sealing member is wedged into the generally V-shaped tapered channel of the second sealing member, whereby an airtight seal is formed. 12. A plastic bag including side walls joined at seams to form a compartment sealable by means of the closure device, wherein the side walls extend above the closure device to form mouth portions; wherein the closure device comprises first and second interlocking fastening strips arranged to be interlocked over a predetermined length, wherein the first fastening strip including a first interlocking member and a third interlocking member and further including a first flexible wing adjacent the first interlocking member and extending from the first fastening strip beyond the height of the first interlocking member; the second fastening strip including a second interlocking member for mating with the first interlocking member and a fourth interlocking member for mating with the third interlocking member, the second fastening strip further including a second flexible wing adjacent the second interlocking member and extending from the second fastening strip beyond the height of the second interlocking member; wherein the first wing engages with the second wing when the first and second fastening strips interlock and wherein the engagement of the first and second wings cause the first closure element and the second closure element to pivot so that the third interlocking member engages the forth interlocking member before the first interlocking member engages the third interlocking member. 13. The invention as in claim 12, wherein first and second wings are located on the innermost side of the closure device located nearest to the closed bottom end portion of the bag. 14. The invention as in claim 12, wherein the first fastening strip includes a third wing adjacent the third interlocking member and extending below the height of the third interlocking member and the second fastening strip includes a fourth wing adjacent the fourth interlocking member and extending below the height of the fourth interlocking member, whereby the third wing does not touch with the fourth wing when the first and second fastening strips interlock. 15. The invention as in claim 12, wherein the first fastening strip includes a third rigid wing adjacent the third interlocking member and the second fastening strip includes a fourth rigid wing adjacent the fourth interlocking member, whereby the third wing aligns next to the fourth wing when the first and second fastening strips interlock. 16. The invention as in claim 12, wherein the first fastening strip contains a notch between the first interlocking member and the first wing. 17. The closure mechanism of claim 12, wherein each of the first and third interlocking members comprises a pair of arms forming a channel-shaped female interlocking member, and wherein each of the second and fourth interlocking members comprises an arrow-shaped male interlocking member. 18. The closure mechanism of claim 12, wherein the first closure element has a first sealing member protruding from the first base member and disposed between the first interlocking member and the third interlocking member; and the second closure element has a second sealing member protruding from the second base member and disposed between the second interlocking member and the fourth interlocking member, and, wherein the second sealing member forms a generally V-shaped tapered channel; wherein the first sealing member is wedged into the generally V-shaped tapered channel of the second sealing member, whereby an airtight seal is formed.