US4249659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat shrunk package
Assignee: Cryovac LLC
•
Filing: 1979-05-07
•
Granted: 1981-02-10
•
Expires: 1999-05-07
Abstract
Abstract A package and a method of producing a package by forming a pocket in the central portion of a sheet of wrapping material, preferably a thermoplastic film, placing a product within the pocket, folding the flat portions of the film into face-to-face contact and bonding the flat portions together. The package can also be evacuated and hermetically sealed. If the film has been oriented, the pocket may be heat shrunk.
Inventors
- 👤 Henry G. Schirmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:39
CPC Classifications
B; B65; B65B; B65B9/00; B65B31/00; B65B31/02; B65B31/021; B65D; B65D75/00; B65D75/002
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
90 words
A package comprising: (a) an article; (b) a single thermoplastic film sheet enclosing said article, said film sheet comprising: (1) a shrunken portion closely conforming to the shape of said article, said shrunken portion having been previously stretched, and (2) a flange portion comprising sealed together edge portions of said sheet which seal closes said article containing shrunken portion, said flange being continuous on one side of said package and extending around approximately one half of said article, the edge portions which comprise said flange being substantially unstretched and non-shrunken.
Claim 2
Dependent Claim
90 words
A package comprising: (a) an article; (b) a single thermoplastic film sheet enclosing said article, said film sheet comprising: (1) a shrunken portion closely conforming to the shape of said article, said shrunken portion having been previously stretched, and (2) a flange portion comprising sealed together edge portions of said sheet which seal closes said article containing shrunken portion, said flange being continuous on one side of said package and extending around approximately one half of said article, the edge portions which comprise said flange being substantially unstretched and non-shrunken.
Claim 3
Dependent Claim
24 words
The package of claim 1 wherein the shrunken, article containing portion is hermetically closed by said flange and the article containing space is evacuated.
References Cited (Backward Citations)
CH420536A
Cited
US3127993A
Cited
US3516537A
Cited
US3679048A
Cited
US3776375A
Cited
US3863837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |