US3575337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Food package
Assignee: Individual
•
Filing: 1969-08-21
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Granted: 1971-04-20
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Expires: 1989-08-21
Abstract
Abstract A food package, especially for sandwiches, particularly adapted to be closed by a heat-sealing operation and characterized by insulating the enclosed food from the heat inherent in forming the heat seal. The shape of the package is modified in the course of the closure operation to grip against the sides of the bread slices, thus to limit relative movement of the article and package, and assure that the contents of the sandwich are preserved intact.
Inventors
- 👤 Daniel Bernhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:21
CPC Classifications
B; B65; B65D; B65D77/00; B65D77/10; B65D77/12; B65D85/00; B65D85/30; B65D85/36; Y; Y10; Y10S; Y10S206/00; Y10S206/822; Y10S229/00; Y10S229/902; Y10S229/938
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
216 words
A sandwich package or the like comprising a body portion of expanded foamed material or the like, said package including a pair of generally trapezoidal end walls having major and minor bases, the minor bases of said trapezoids being joined together, the body including a pair of generally triangular sidewall portions, the apices of said sidewall portions coinciding with opposite extremities of the junction of said minor bases, the sides of said triangles adjacent said apices being connected, respectively, to side portions of said end walls, the bases of said triangular sidewalls and the major bases of said end walls together defining an essentially planar open mouth portion, foldable flap members hingedly extending from an opposed pair of bases of said walls and being foldable about a fold line parallel to the plane of said open mouth portion, and a transparent covering sheet connected to one of said triangular sidewalls adjacent the base thereof, said sheet being foldable to and adapted to be secured in closing rElation of said mouth portion in outwardly lapping relation of the other said sidewall, said sheet, in said outwardly lapping relation, biasing said flap portions upwardly toward said apex, said flaps, in the closed relation of said package, being disposed below the level of the bases of said triangular sidewalls.
Claim 2
Dependent Claim
216 words
A sandwich package or the like comprising a body portion of expanded foamed material or the like, said package including a pair of generally trapezoidal end walls having major and minor bases, the minor bases of said trapezoids being joined together, the body including a pair of generally triangular sidewall portions, the apices of said sidewall portions coinciding with opposite extremities of the junction of said minor bases, the sides of said triangles adjacent said apices being connected, respectively, to side portions of said end walls, the bases of said triangular sidewalls and the major bases of said end walls together defining an essentially planar open mouth portion, foldable flap members hingedly extending from an opposed pair of bases of said walls and being foldable about a fold line parallel to the plane of said open mouth portion, and a transparent covering sheet connected to one of said triangular sidewalls adjacent the base thereof, said sheet being foldable to and adapted to be secured in closing rElation of said mouth portion in outwardly lapping relation of the other said sidewall, said sheet, in said outwardly lapping relation, biasing said flap portions upwardly toward said apex, said flaps, in the closed relation of said package, being disposed below the level of the bases of said triangular sidewalls.
Claim 3
Dependent Claim
64 words
A package in accordance with claim 1 wherein said flaps are connected to the major bases of said end walls and said triangular sidewalls are outwardly bowed in the unstressed condition thereof and are distorted inwardly from said outwardly bowed position in the secured position of said sheet, thereby clampingly to engage the contents of said package under the constraining influence of said sheet.
Claim 4
Dependent Claim
80 words
A package in accordance with claim 2 wherein the transverse dimension of said flaps exceeds the transverse spacing of said triangular wall portions in the inwardly folded condition of said flaps, whereby the undersurface of said flaps engages against the undersurface of the bases of said sidewalls, the contents of said package being supported against said under surface of said flaps whereby said sheet is spaced from the contents of said package by at least the thickness of said flaps.
Claim 5
Dependent Claim
114 words
A sandwich package or the like comprising a body portion of relatively rigid material, said package being generally triangular in vertical section and including generally triangular, outwardly bowed sidewall portions to accept a diagonally cut sandwich, the package including a generally planar open mouth portion, a transparent covering sheet connected to one of said sidewall portions and adapted to be outwardly lapped in covering relation of said open mouth portion and sealed to said other sidewall portion, said sheet, in the sealed position thereof, deflecting said sidewall portions inwardly from said outwardly bowed condition, thereby yieldingly to engage the contents of said package to minimize shifting movement of said contents relative to said package.
Claim 6
Dependent Claim
114 words
A sandwich package or the like comprising a body portion of relatively rigid material, said package being generally triangular in vertical section and including generally triangular, outwardly bowed sidewall portions to accept a diagonally cut sandwich, the package including a generally planar open mouth portion, a transparent covering sheet connected to one of said sidewall portions and adapted to be outwardly lapped in covering relation of said open mouth portion and sealed to said other sidewall portion, said sheet, in the sealed position thereof, deflecting said sidewall portions inwardly from said outwardly bowed condition, thereby yieldingly to engage the contents of said package to minimize shifting movement of said contents relative to said package.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |