US4848649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Package with tear opening strip device
Assignee: Greif International Holding BV
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Filing: 1988-06-10
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Granted: 1989-07-18
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Expires: 2008-06-10
Abstract
Abstract A package for foods is disclosed and comprises a container having a peripheral flange at its mouth. The container is made of or lined with a plastics material so as to provide a plastics surface at the flange. The container is covered by a lid which is heat-sealed to the flange. In order to be able to open the package easily, especially when it is hot, a tear-strip of material extends across at least the flange and is secured to the lid by a heat seal. The tear-strip presents a tab for engagement by the fingers of a user, and, in order to ensure that the lid can be torn effectively by the tear-strip, the bond between the tear-strip and the lid is chosen to be at least as strong as the bond between the lid and the flange.
Inventors
- 👤 Anthony T. B. Fuller
- 👤 Arthur N. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:45
CPC Classifications
B; B65; B65D; B65D77/00; B65D77/22; B65D77/30; B65D77/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A package comprising a container having a mouth of which is formed with a peripheral flange, the container including a layer of plastic material, and a lid which is heat-sealed to the flange of the container, comprising a tear-strip of material extending across at least the flange of the container and being secured to the lid by a heat-seal, with a portion of the tear-strip material being presented for engagement by the fingers of a user, the bond between the tear-strip and the lid being at least as strong as the bond between the lid and the flange.
Claim 2
Dependent Claim
98 words
A package comprising a container having a mouth of which is formed with a peripheral flange, the container including a layer of plastic material, and a lid which is heat-sealed to the flange of the container, comprising a tear-strip of material extending across at least the flange of the container and being secured to the lid by a heat-seal, with a portion of the tear-strip material being presented for engagement by the fingers of a user, the bond between the tear-strip and the lid being at least as strong as the bond between the lid and the flange.
Claim 3
Dependent Claim
46 words
A package as claimed in claim 1, wherein the lid and the tear-strip each comprise a layer of plastic material and a layer of a heat-seal material, and wherein the tear-strip is interposed between the lid and the flange in an A to B sealing mode.
Claim 4
Dependent Claim
44 words
A package as claimed in claim 1, wherein the lid is made of paper and the tear-strip is a strip of paper heat-sealed to the upper surface of the lid by the interposition of a layer of plastic material coated with a heat-seal material.
Claim 5
Dependent Claim
50 words
A package as claimed in claim 1, wherein the lid is made of paper and the tear-strip is a strip of paper to each side of which a layer of plastic material is adhered by a heat-seal material, and wherein the tear-strip is interposed between the lid and the flange.
Claim 6
Dependent Claim
34 words
A package as claimed in any one of claims 1 to 4, wherein the plastic material of the tear-strip and for the lid is a polyester, and the heat-seal material is an acrylic coating.
Claim 7
Dependent Claim
37 words
A package as claimed in any one of claims 1 to 4, wherein the plastic material of both the tear-strip and the lid is a polyester, and the heat-seal material is a coating of a different polyester.
Claim 8
Dependent Claim
18 words
A package as claimed in claim 5, wherein the polyester of the tear-strip and lid is polyethylene terephthalate.
Claim 9
Dependent Claim
14 words
A package as claimed in claim 1, wherein the tear-strip extends across the package.
Claim 10
Dependent Claim
18 words
A package as claimed in claim 6, wherein the polyester of the tear-strip and lid is polyethylene terephthalate.
References Cited (Backward Citations)
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |