EP0270764B1
Expired / Lapsed
EP
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Container providing controlled atmospheric storage
Assignee: Hercules LLC
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Filing: 1987-10-06
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Granted: 1991-12-18
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Expires: 2007-10-06
Abstract
No abstract record available.
Inventors
- 👤 Harry Sutton Anderson Ii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 13:25
CPC Classifications
A; A23; A23B; A23B7/00; A23B7/14; A23B7/144; A23B7/148; B; B65; B65D; B65D81/00; B65D81/18; B65D81/20; B65D81/2069; B65D81/2076; B65D2565/00; B65D2565/38; B65D2565/381; B65D2565/388
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
146 words
A container capable of creating within it a preselected carbon dioxide and oxygen concentration in the presence of respiring fresh fruit, vegetables or flowers, that is constructed of a substantially gas-impermeable material having a gas-permeable panel in one or more its walls to provide a controlled flow or flux of CO₂ and O₂ through its walls, characterized in that the panel is a microporous plastic membrane having an oxygen permeance between 77,500 and 465,000,000 cm³/m²-day-atmosphere, the permeance and area of the membrane being such as to provide a flux of O₂ approximately equal to the predicted O₂ respiration rate of the enclosed fruit, vegetable or flower, and the carbon dioxide permeance of the membrane being such as to maintain the desired optimum ratio of carbon dioxide to oxygen, wherein the selected film has a permeability sufficient to allow the type of control of the atmosphere required.
Claim 2
Dependent Claim
23 words
A container as claimed in claim 1, further characterized in that the microporous membrane has a permeance between about 310,000 and 13,950,000 cm³/m²-day-atmosphere.
Claim 3
Dependent Claim
42 words
A container as claimed in claim 1 or 2, further characterized in that the microporous membrane is an oriented film comprised of a blend of a propylene homopolymer and a propylene-ethylene copolymer having an ethylene-moity concentration of 2 to 5% by weight.
Claim 4
Dependent Claim
30 words
A container as claimed in claim 1, 2, or 3, further characterized in that the microporous membrane has a carbon dioxide to oxygen permeance ratio of about 1 to 1.
Claim 5
Dependent Claim
33 words
A container as claimed in any of the preceeding claims, further characterized in that the microporous membrane is filled with 40 to 60% calcium carbonate, based on the total weight of the film.
Claim 6
Dependent Claim
25 words
A container as claimed in any of the preceeding claims, further characterized in that it has two permeable control membranes having different CO₂/O₂ permeance ratios.
Claim 7
Dependent Claim
31 words
A container as claimed in any of the preceeding claims, further characterized in that the CO₂/O₂ permeance ratios are in the range of 1 to 1 to 8 to 1 inclusive.
Claim 8
Dependent Claim
83 words
A container as claimed in any of the preceeding claims, further characterized in that the permeance and area of the membrane is such as to provide a flux of O₂ approximately equal to the predicted O₂ respiration rate of not more than 1.5 kg of enclosed fruit, vegetable or flower, and the carbon dioxide permeance of the membrane being such as to maintain the desired optimum ranges of carbon dioxide and oxygen for not more than the said 1.5 kg of enclosed produce.
References Cited (Backward Citations)
No citation records indexed.
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