US4611456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making a vacuum skin package and product formed thereby
Assignee: Cryovac LLC
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Filing: 1986-02-20
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Granted: 1986-09-16
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Expires: 2006-02-20
Abstract
Abstract The invention relates to a method of forming containers useful in vacuum packaging applications which require that the packaged product be wrapped in an air-impervious enclosure. According to one aspect of the invention, the method comprises a step wherein a substrate of an air pervious, semipervious or impervious material is mold formed, and a subsequent step wherein an impervious film is applied on the molded substrate and adhered thereto to produce an impervious substrate. In another aspect, a product is placed on the impervious substrate and enclosed by an impervious film in a vacuum skin packaging process.
Inventors
- 👤 Mario Gillio-Tos
- 👤 Enzo Vassarotti
- 👤 Henry G. Schirmer
- 👤 Gottfried Von Bismarck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:48
CPC Classifications
B; B65; B65B; B65B11/00; B65B11/50; B65B11/52; B65D; B65D75/00; B65D75/28; B65D75/30; B65D75/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
In the method of making a vacuum skin package having a substrate, a top film, and a product therebetween in a vacuum chamber, the improvement comprising the steps of: (a) applying an impervious film to one surface of the substrate by means of pneumatic pressure difference; said impervious film having smaller dimensions than the dimensions of the substrate, the uncovered portion of the substrate forming grip-enhancing edges; (b) placing the product to be package on said impervious film; (c) positioning a top film over the product; (d) evacuating the space between the top film and product; (e) Forming the top film around the periphery of the product and into sealing contact with the impervious film on the substrate by means of pneumatic pressure; and (f) Trimming off the grip-enhancing edges which extend beyond the impervious film thereby producing a vacuum skin package.
Claim 2
Dependent Claim
142 words
In the method of making a vacuum skin package having a substrate, a top film, and a product therebetween in a vacuum chamber, the improvement comprising the steps of: (a) applying an impervious film to one surface of the substrate by means of pneumatic pressure difference; said impervious film having smaller dimensions than the dimensions of the substrate, the uncovered portion of the substrate forming grip-enhancing edges; (b) placing the product to be package on said impervious film; (c) positioning a top film over the product; (d) evacuating the space between the top film and product; (e) Forming the top film around the periphery of the product and into sealing contact with the impervious film on the substrate by means of pneumatic pressure; and (f) Trimming off the grip-enhancing edges which extend beyond the impervious film thereby producing a vacuum skin package.
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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) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |