US4223512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of packaging and sterilizing products
Assignee: Robert Bosch GmbH
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Filing: 1978-11-27
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Granted: 1980-09-23
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Expires: 1998-11-27
Abstract
Abstract A method is proposed for packaging products, particularly food products, and sterilizing them in an alternating high-frequency electromagnetic field. The product is first introduced into trough-like, preferably interconnected containers provided with a metallic layer; then the containers are closed with a synthetic film, brought within the range of an alternating high-frequency electromagnetic field, and finally sealed with a foil having a metallic lamina which covers the synthetic film.
Inventors
- 👤 Norbert Buchner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:59
CPC Classifications
B; B65; B65B; B65B55/00; B65B55/02; B65B55/12; B65B55/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
101 words
A method for packaging products, particularly food products, and for sterilizing them in an alternating high-frequency electromagnetic field, comprising the steps of: forming a traveling laminate having a metallic layer into a container to provide a trough-like area into which a product is to be introduced; advancing the formed container past a product discharge point to deposit a predetermined quantity of said product into said container; covering the container with a synthetic film introduced thereover from a traveling web; moving the containers seriatim through a high-frequency microwave field and applying a sealing layer of a metallic foil over the synthetic film.
Claim 2
Independent Claim
101 words
A method for packaging products, particularly food products, and for sterilizing them in an alternating high-frequency electromagnetic field, comprising the steps of: forming a traveling laminate having a metallic layer into a container to provide a trough-like area into which a product is to be introduced; advancing the formed container past a product discharge point to deposit a predetermined quantity of said product into said container; covering the container with a synthetic film introduced thereover from a traveling web; moving the containers seriatim through a high-frequency microwave field and applying a sealing layer of a metallic foil over the synthetic film.
Claim 3
Dependent Claim
25 words
A method in accordance with claim 1, the further step wherein the trough-like containers are subjected to the individual treatment steps as an interconnected chain.
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) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |