US4276340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose packaging films for packaging soft cheeses
Assignee: MORIN SA
•
Filing: 1979-06-27
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Granted: 1981-06-30
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Expires: 1999-06-27
Abstract
Abstract A cellulose packaging film for packaging soft cheeses has a controlled permeability to oxygen, carbon dioxide, ammonia and water vapor which allows the cheese to properly ripen while wrapped in the packaging material. The cellulose packaging film is formed from a cellulose film substrate with a coating layer of a nitrocellulose varnish having distributed therein casein or starch particles which have a diameter which is greater than the thickness of the coating layer. In use, the soft cheese is wrapped with the cellulose packaging film with the nitrocellulose varnish layer facing the soft cheese.
Inventors
- 👤 Jean-Pierre de Leiris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:27
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/048; C08J2301/00; C08J2301/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24562; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/24934; Y10T428/25; Y10T428/254
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
A water vapor permeable cellulose packaging film especially adapted for packaging soft cheeses which comprises a cellulose film support; and a nitrocellulose varnish layer coated on said support, said varnish layer containing particles of casein or starch dispersed throughout said layer, said particles having a diameter greater than the thickness of said varnish layer.
Claim 2
Dependent Claim
54 words
A water vapor permeable cellulose packaging film especially adapted for packaging soft cheeses which comprises a cellulose film support; and a nitrocellulose varnish layer coated on said support, said varnish layer containing particles of casein or starch dispersed throughout said layer, said particles having a diameter greater than the thickness of said varnish layer.
Claim 3
Dependent Claim
22 words
The cellulose packaging film according to claim 1 wherein the average particle diameter of the particles is between 5 and 20 microns.
Claim 4
Dependent Claim
45 words
The cellulose packaging film according to claim 1 or 2 wherein the nitrocellulose varnish coating contains a water proofing agent in an amount to obtain a water vapor permeability between 400 g/m 2 /24 h and 1000 g/m 2 /24 h measured under tropical conditions.
Claim 5
Dependent Claim
31 words
The cellulose packaging film according to claims 1, or 2 wherein the support has a water permeability greater than or equal to 1,000 g/m 2 /24 h measured under tropical conditions.
Claim 6
Dependent Claim
30 words
The cellulose packaging film according to claims 1 or 2 wherein the cellulose film support is previously coated on one or both sides with a thin layer of nitrocellulose varnish.
Claim 7
Dependent Claim
28 words
The cellulose packaging film according to claims 1 or 2 which further comprises printed matter comprising a nitrocellulose ink between the support and the nitrocellulose varnish layer coating.
Claim 8
Dependent Claim
28 words
The cellulose packaging film according to claim 6 which further comprises a white or colored opaque coating overlying said printed matter and beneath said nitrocellulose varnish coating layer.
Claim 9
Dependent Claim
20 words
The cellulose packaging film according to claim 7 wherein the opaque coating comprises a titanium dioxide, silica or alumina base.
Claim 10
Dependent Claim
76 words
A process for making a cellulose packaging film intended for packaging soft cheeses comprising unwinding a coated or uncoated cellulose film support, said support having a water vapor permeability measured under tropical conditions greater than or equal to 1,000 g/m 2 /24 h, and coating a superlayer of nitrocellulose varnish containing casein or starch particles uniformly dispersed throughout said varnish, said particles having a particle diameter which is greater than the applied thickness of said superlayer.
Claim 11
Dependent Claim
76 words
A process for making a cellulose packaging film intended for packaging soft cheeses comprising unwinding a coated or uncoated cellulose film support, said support having a water vapor permeability measured under tropical conditions greater than or equal to 1,000 g/m 2 /24 h, and coating a superlayer of nitrocellulose varnish containing casein or starch particles uniformly dispersed throughout said varnish, said particles having a particle diameter which is greater than the applied thickness of said superlayer.
Claim 12
Dependent Claim
36 words
The process of claim 9 which further comprises, prior to applying said superlayer, printing with a nitrocellulose ink a pattern on said cellulose film support and coating a white or colored opaque layer on said pattern.
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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) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |