US3580478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging
Assignee: Individual
•
Filing: 1969-07-24
•
Granted: 1971-05-25
•
Expires: 1989-07-24
Abstract
Abstract The carton and package provides for a new type of closure which may take several different forms, each of which incorporates a coated paperboard lid having a heat-sealable plastic coating such as polyethylene for example. Wherein a 180* bend is made to provide an outer edge of the lid which is heat-sealed together to provide strength to support a divergent flange or edge which is used in accomplishing a closing and/or sealing of the carton or package. In one form, this edge provides a snap-on operation for mechanically securing the lid on a tray by an interlocking relation between the horizontal flange on the top of the tray and the lid. In another form of the invention, to provide the mechanical securing the edge of the lid is heat-sealed to the underside of the lip of the tray while the body of the paperboard lid is being heat-sealed on the top side of the lip of the tray. In both instances, an adhesive seal is used in addition to the heat seal which melts at temperatures below 212* F. and preferably at about 170*-180* F.
Inventors
- 👤 Robert P Bemiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:05
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/64; B65D43/00; Y; Y10; Y10S; Y10S229/00; Y10S229/924
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
182 words
A snap-on lid for a package such as a tray or carton having an open end provided with horizontal flange means extending outwardly from said open end for purposes of receiving a closure or lid, said lid comprising a central wall portion coextensive with said open end and said flange means, said lid having a plurality of downwardly extending sidewalls at the edges of said central wall portion, certain of said sidewalls on said lid each having a first part extending downwardly away from said wall portion and an upwardly extending second part disposed inwardly of said first part with respect to said lid and being bent back on said first part to form a bend edge and terminating in spaced relation from said wall portion to provide a flange receiving and trapping space between the free edge of said second part and said wall portion, whereby when said lid is applied to a tray or carton the flange means will snap past the second wall part and be trapped thereby to hold the lid tightly engaged with the tray or carton.
Claim 2
Dependent Claim
182 words
A snap-on lid for a package such as a tray or carton having an open end provided with horizontal flange means extending outwardly from said open end for purposes of receiving a closure or lid, said lid comprising a central wall portion coextensive with said open end and said flange means, said lid having a plurality of downwardly extending sidewalls at the edges of said central wall portion, certain of said sidewalls on said lid each having a first part extending downwardly away from said wall portion and an upwardly extending second part disposed inwardly of said first part with respect to said lid and being bent back on said first part to form a bend edge and terminating in spaced relation from said wall portion to provide a flange receiving and trapping space between the free edge of said second part and said wall portion, whereby when said lid is applied to a tray or carton the flange means will snap past the second wall part and be trapped thereby to hold the lid tightly engaged with the tray or carton.
Claim 3
Dependent Claim
39 words
A snap-on lid as recited in claim 1, in which said second part of said wall portion has a surface of heat-sealable character and has an outer edge part bent back through 180* on itself and heat-sealed to itself.
Claim 4
Dependent Claim
41 words
A snap-on lid as recited in claim 1, in which said first and second parts have surfaces of heat-sealable character and have a heat-sealed strip connection adjacent to said bent edge but terminating in spaced relation from said free edge thereof.
Claim 5
Dependent Claim
26 words
A snap-on lid as recited in claim 1, in which said sidewalls have a surface of heat-sealable character and have respective overlapping corner connections heat-sealed together.
Claim 6
Dependent Claim
92 words
A boilable package for food products which comprises a tray and a lid, a mechanical connection between the tray and the lid providing for a watertight sealed relation between the lid and the tray, said mechanical connection also having at least one location where it will pass gas under pressure such as steam from the boiling of the contents of the package, and a gastight connection between the tray and the lid comprising a coating of meltable or heat-softenable material applied to said location and having a melting point below 212* F.
Claim 7
Dependent Claim
92 words
A boilable package for food products which comprises a tray and a lid, a mechanical connection between the tray and the lid providing for a watertight sealed relation between the lid and the tray, said mechanical connection also having at least one location where it will pass gas under pressure such as steam from the boiling of the contents of the package, and a gastight connection between the tray and the lid comprising a coating of meltable or heat-softenable material applied to said location and having a melting point below 212* F.
Claim 8
Dependent Claim
26 words
A boilable package for food products which comprises a tray and a lid as recited in claim 5, in which said mechanical connection comprises interlocking elements.
Claim 9
Dependent Claim
37 words
A boilable package for food products which comprises a tray and a lid as recited in claim 5, in which said lid and said tray have abutting portions thereof adjacent the opening of the tray heat-sealed together.
Claim 10
Dependent Claim
40 words
A boilable package for food products which comprises a tray and a lid as recited in claim 5, in which said tray has a flange positioned about its opens side, and said lid has a trapping connection to said flange.
Claim 11
Dependent Claim
165 words
A boilable package as recited in claim 8, in which said lid comprising a central wall portion coextensive with said lid comprising a central wall portion coextensive with said open end and said flange means, said lid having a plurality of downwardly extending sidewalls at the edges of said central wall Portion, certain of said sidewalls on said lid each having a first part extending downwardly away from said wall portion and an upwardly extending second part disposed inwardly of said first part with respect to said lid and being bent back on said first part to form a bent edge and terminating in spaced relation from said wall portion to provide a flange-receiving and trapping space between the free edge of said second part and said wall portion, whereby when said lid is applied to a tray or carton the flange means will snap past the second wall part and be trapped thereby to hold the lid tightly engaged with the tray or carton.
Claim 12
Dependent Claim
40 words
A boilable package as recited in claim 9, in which said second part of said wall portion has a surface of heat-sealable character and has an outer edge part bent bent back through 180* upon itself and heat-sealed to itself.
Claim 13
Dependent Claim
41 words
A boilable package as recited in claim 9, in which said first and second parts have surfaces of heat-sealable character and have a heat-sealed strip connection adjacent to said bent edge but terminating in spaced relation from said free edge thereof.
Claim 14
Dependent Claim
26 words
A boilable package as recited in claim 9, in which said sidewalls have a surface of heat-sealable character and have respective overlapping corner connections heat-sealed together.
References Cited (Backward Citations)
US2800266A
Cited
US3352479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |