US4646933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vented plastic can and tin lid therefor
Assignee: US Smokeless Tobacco Co LLC
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Filing: 1985-10-07
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Granted: 1987-03-03
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Expires: 2005-10-07
Abstract
Abstract A plastic can has been disclosed which is designed to retain freshness of the contents and provide, during the lidding operation, an easy placement of the lid thereon; the can has vents which allow the lid to be placed thereon without pneumatic back pressure restraining the lid from properly seating on the can; at the same time, for high speed lid placement certain camming arrangements have been provided to facilitate the lid being placed on the can and being seated properly thereon; considerable improvements in retained content freshness have been observed.
Inventors
- 👤 Edward Jurczenia
- 👤 Alton W. Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:15
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/16; B65D51/1633; B65D51/1661; B65D51/1666
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
154 words
As an article of manufacture, a plastic can suitable for receiving a lid for closing said can comprising: a side wall, a lid receiving section and a bottom wall wherein said lid receiving section has a side wall of a reduced thickness from that of the side wall; a ledge at the bottom of said lid receiving section; an interference fit section between said ledge and a top of said lid receiving section; a lid camming section between said interference fit section and said top of said lid receiving section; a plurality of venting slots in said interference fit section and at the bottom of said lid camming section; a plurality of slots in said lid camming section within the top surface thereof; an outer rim for said top surface; and a pointed inner rim defined between an inner surface of said lid camming section and said top surface for said lid camming section.
Claim 2
Dependent Claim
154 words
As an article of manufacture, a plastic can suitable for receiving a lid for closing said can comprising: a side wall, a lid receiving section and a bottom wall wherein said lid receiving section has a side wall of a reduced thickness from that of the side wall; a ledge at the bottom of said lid receiving section; an interference fit section between said ledge and a top of said lid receiving section; a lid camming section between said interference fit section and said top of said lid receiving section; a plurality of venting slots in said interference fit section and at the bottom of said lid camming section; a plurality of slots in said lid camming section within the top surface thereof; an outer rim for said top surface; and a pointed inner rim defined between an inner surface of said lid camming section and said top surface for said lid camming section.
Claim 3
Dependent Claim
20 words
The article as defined in claim 1 wherein a seated lid is on top surface of said lid receiving section.
Claim 4
Dependent Claim
20 words
The article as defined in claim 1 wherein a seated lid is on said ledge of said lid receiving section.
Claim 5
Dependent Claim
45 words
The article as defined in claim 1 wherein the top surface of said lid receiving section abutts against an offset rim on a lid at an underside of said lid at an intersection between said offset rim and at an underside of a lid surface.
Claim 6
Dependent Claim
33 words
The article as defined in claim 1 wherein the lid camming section is at an angle of 7° to 15° away from a perpendicular and inwardly from a side wall of said can.
Claim 7
Dependent Claim
23 words
The article as defined in claim 1 wherein said interference fit section for said lid section includes at least one rib circumferentially thereof.
Claim 8
Dependent Claim
19 words
The article as defined in claim 6 wherein said rib is half round with venting slots in said rib.
Claim 9
Dependent Claim
90 words
In a method for lidding a can such as a plastic can with a metal lid, the improvement comprising: camming said lid on said can at an initiation catch point on one side of said can independent of an orientation of said can, wherein the lid is oriented at an angle away from the horizontal surface of said can; progressively seating, by force, said lid on said can; progressively relieving pneumatic back-pressure in said can while said lid is being seated; and predeterminedly venting said can for desired venting purposes.
Claim 10
Dependent Claim
90 words
In a method for lidding a can such as a plastic can with a metal lid, the improvement comprising: camming said lid on said can at an initiation catch point on one side of said can independent of an orientation of said can, wherein the lid is oriented at an angle away from the horizontal surface of said can; progressively seating, by force, said lid on said can; progressively relieving pneumatic back-pressure in said can while said lid is being seated; and predeterminedly venting said can for desired venting purposes.
References Cited (Backward Citations)
US3042247A
Cited
US3874556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |