Patent US4724978A successfully refreshed from Google Patents.
US4724978A
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Plastic container with integral tamper-evident, reclosable lid
Assignee: Acorn Technologies Inc
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Filing: 1987-05-05
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Granted: 1988-02-16
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Expires: 2007-05-05
Abstract
Abstract A unitary plastic container and integrally molded, tamper-evident, reclosable lid, which lid has a recessed planar member, with a rupturable portion, and an integral closure member hingedly secured thereto. The planar member and closure member provide an initial double seal for the contents of the container while the closure member provides a single seal for the contents after removal of the planar member. The container and integral lid are preferably formed from a rigid plastic material such as polypropylene.
Inventors
- 👤 Bruce T. Cleevely
- 👤 Harry M. George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:39
CPC Classifications
B; B65; B65D; B65D47/00; B65D47/04; B65D47/06; B65D47/10; B65D47/103
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
A plastic container having an integrally molded tamper-evident, reclosable, plastic lid comprising: a bottom wall and upstanding side walls having an upper edge thereon; a top wall extending inwardly from the upper edges of said side walls, said top wall having a substantially linear inner portion and a downwardly extending face along said substantially linear inner portion; a recess formed in said top wall bounded in part by said downwardly extending face; a plastic planar member extending across said recess; a rupturable portion on said planar member allowing access to the contents of the container when said rupturable portion is removed; an integral closure member hingedly secured to said top wall adjacent said downwardly extending face, adapted to completely cover said recess and said planar member therein; and locking means for securing said closure member to said top wall when in closed position.
Claim 2
Dependent Claim
143 words
A plastic container having an integrally molded tamper-evident, reclosable, plastic lid comprising: a bottom wall and upstanding side walls having an upper edge thereon; a top wall extending inwardly from the upper edges of said side walls, said top wall having a substantially linear inner portion and a downwardly extending face along said substantially linear inner portion; a recess formed in said top wall bounded in part by said downwardly extending face; a plastic planar member extending across said recess; a rupturable portion on said planar member allowing access to the contents of the container when said rupturable portion is removed; an integral closure member hingedly secured to said top wall adjacent said downwardly extending face, adapted to completely cover said recess and said planar member therein; and locking means for securing said closure member to said top wall when in closed position.
Claim 3
Dependent Claim
55 words
A plastic container having an integrally molded, tamper-evident, reclosable plastic lid as defined in claim 1 wherein said container is formed from a plastic material having a tensile molulus in excess of about 100×10 3 p.s.i., a flexural modulus in excess of about 100×10 3 p.s.i., and a melting point in excess of 140° C.
Claim 4
Dependent Claim
92 words
A plastic container having an integrally molded tamper-evident, reclosable, plastic lid as defined in claim 1 wherein the upper edge of the upstanding side walls form a circle, and said top wall comprises an arcuate section having a downwardly extending inner wall and a segmental section shaped as a segment of said circle, with said downwardly extending face extending along the chord of said segment, said arcuate section and segmental section merging such that the inner wall of said arcuate section and said downwardly extending face form the bounds of said recess.
Claim 5
Dependent Claim
64 words
A plastic container having an integrally molded tamper-evident, reclosable, plastic lid as defined in claim 3 wherein the rupturable portion on said planar member is sized so as to provide, when removed from said lid, an opening for access to said container which is at least 80 percent of the area of the circle formed by said upper edge of the upstanding side walls.
Claim 6
Dependent Claim
46 words
A plastic container having an integrally molded tamper-evident, reclosable, plastic lid as defined in claim 4 wherein the rupturable portion on said planar member comprises a central portion bounded by an outer peripheral portion, and a tear line is formed intermediate said central and peripheral portions.
Claim 7
Dependent Claim
25 words
A plastic container having an integrally molded tamper-evident, reclosable, plastic lid as defined in claim 5 wherein said plastic container is formed completely of polypropylene.
Claim 8
Dependent Claim
57 words
A plastic container having an integrally molded tamper-evident, reclosable, plastic lid as defined in claim 6 wherein said central and peripheral portions of said planar member have a thickness of between about 0.030 to 0.040 inch, and said tear line has a thickness of 0.002 to 0.007 inch and a width of about 0.001 to 0.025 inch.
Claim 9
Dependent Claim
86 words
A plastic container having an integrally molded tamper-evident, reclosable, plastic lid as defined in claim 1 wherein the upper edge of said upstanding side walls form a rectangle and said top wall comprises said substantially linear inner portion, an opposed inwardly extending rim and a pair of inwardly extending side rims, said opposed and pair of said rims having a downwardly extending inner wall, with said downwardly extending face and downwardly extending inner walls of said opposed and side rims forming the bounds of said recess.
Claim 10
Dependent Claim
46 words
A plastic container having an integrally molded tamper-evident, reclosable, plastic lid as defined in claim 8 wherein the rupturable portion on said planar member comprises a central portion bounded by an outer peripheral portion, and a tear line is formed intermediate said central and peripheral portions.
Claim 11
Dependent Claim
25 words
A plastic container having an integrally molded tamper-evident, reclosable, plastic lid as defined in claim 9 wherein said plastic container is formed completely of polypropylene.
Claim 12
Dependent Claim
57 words
A plastic container having an integrally molded tamper-evident, reclosable, plastic lid as defined in claim 10 wherein said central and peripheral portions of said planar member have a thickness of between about 0.030 to 0.040 inch, and said tear line has a thickness of 0.002 to 0.007 inch and a width of about 0.001 to 0.025 inch.
Claim 13
Dependent Claim
38 words
A plastic container having an integrally molded tamper-evident, reclosable, plastic lid as defined in claim 8 wherein said closure member covers all of said recess, said opposed inwardly extending rim, and said pair of inwardly extending side rims.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |