DEGASSING VALVE WITH POSITIVE-PRESSURE CONTROL, METHODS FOR PRODUCING SAME AND PACKETS CONTAINING SAME

• US 20200130913A1
• Filed: 05/15/2018
• Published: 04/30/2020
• Est. Priority Date: 06/02/2017
• Status: Abandoned Application

• Current Assignee: Prisma Coffee Tech SAS
• Original Assignee: Prisma Coffee Tech SAS
• Inventors: ESTRADA VELEZ, Juan Manuel
• Application Number:
  US16/618,769
• Publication Number:
  US 20200130913A1
• Time in Patent Office: Days
• CPC Class Codes: B32B 2439/70 Food packaging
• CPC Class Codes: B65D 2205/00 Venting means
• CPC Class Codes: B65D 33/01 Ventilation or drainage of bags
• CPC Class Codes: B65D 51/16 with means for venting air or gas
• CPC Class Codes: B65D 51/1644 the element being a valve B65D51/1661 takes precedence
• CPC Class Codes: B65D 77/22 Details
• CPC Class Codes: B65D 77/225 Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
• CPC Class Codes: B65D 81/20 under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas B65D81/28 takes precedence; containers with pressurising means for maintaining ball pressure A63B39/025
• CPC Class Codes: B65D 81/2084 in a flexible container
• CPC Class Codes: B65D 81/24 Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with thermal insulation B65D81/38
• CPC Class Codes: B65D 81/26 with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents B65D33/01 takes precedence; Applications of corrosion inhibitors or desiccators
• CPC Class Codes: F16K 15/147 the closure elements having specially formed slits or being of an elongated easily collapsible form
• CPC Class Codes: F16K 15/16 with tongue-shaped laminae

Abstract

The present invention relates to a one-way multilayer degassing valve, with positive-pressure control, which comprises one or more layers of a base substrate, one or more layers of a stretchable film and one or more layers of a filtering material. The invention also relates to packages comprising these valves and to a method for producing the same.

Claims

1. A one-way degassing valve comprising a first base substrate layer (1);

a first layer of stretchable film (2);

a layer of filtering material (3);

a second layer of stretchable film (4); and

a second base substrate layer (5), all stacked one on top of the other, wherein the first layer of stretchable film (2) and the second layer of stretchable film (4) are arranged between the first base substrate layer (1) and the second base substrate layer (5), the filtering material layer being arranged between the first layer of stretchable film (2) and the second layer of stretchable film (4), and

wherein the base substrate layers (1) (5) have a width larger than the width of the layers of stretchable film (2) (4) and filtering material (3), and the layer of filtering material (3) has a length shorter than the length of the stretchable film layers (2) (4) and base substrate layers (1) (5), the base substrate layers (1) (5) being joined together by heat seals (7), located along the outer edges of the stretchable film layers (2) (4), a conduit (9) being formed in the middle of the layers of stretchable film (2) (4) extending longitudinally through the valve, within which conduit the layer of filtering material (3) is arranged.

2. The valve of claim 1, wherein the base substrate (1) comprises polyethylene, polypropylene, or a plastic for use in lamination.

3. The valve according to any of the preceding claims, wherein the stretchable film (4) is a plastic film of palletizable or stretchable polyethylene.

4. The valve according to any of the preceding claims, wherein the filtering material (3) is a porous material in cotton or cellulose or a material that is not thermal sensitive.

5. The valve according to any of the preceding claims, wherein the stretchable film layers (2) (4) are adhered to the base substrate layers (1) and the layer of filtering material (3) is adhered to one or both layers of stretchable film by means of an adhesive.

11. A package comprising one or more of the valves according to any one of claims 1 to 5, wherein the valves are adhered to one or more edges of the package, by means of a thermal fusion seal (8) or an adhesive that adhere the one or more edges of the package.

6. A method for manufacturing a degassing valve comprising the steps of:

i) Providing an adhesive on one of the faces of a roll of stretchable film and cutting said roll to the required width;

ii) Joining the face of the stretchable film having the adhesive to a base substrate layer, obtaining a first assembly, wherein the stretchable film is centered with respect to the base substrate layer, leaving two strips of base substrate free of stretchable film;

iii) Repeating step ii), to obtain a second assembly;

iv) Providing an adhesive on one of the faces of a roll of filtering material and cutting said roll to have the width of the stretchable film of the assemblies and to have a length shorter than the length of the stretchable film, to obtain several sections of the filtering material;

v) Joining the face having the adhesive of the sections of filtering material to the stretchable film of the first assembly, the different sections of the filtering material being separated by a distance that is equivalent to the length of the valves;

vi) Overlap the second assembly obtained in step iii) over the first assembly obtained in step v), so that the filtering material is disposed between the stretchable film of the first assembly and the stretchable film of the second assembly, the stretchable films being arranged between the base substrate of the first assembly and the base substrate of the second assembly

vii) Applying thermal fusion at the outer edges of the base substrate, adjacent to the edges of the stretchable film;

viii) Cutting the final assembly obtained in step vii) perpendicularly and adjacent to one end of the sections of the filtering material.

7. The method according to claim 6, wherein the base substrate comprises polyethylene, polypropylene, or a plastic for use in lamination.

8. The method according to any of claim 6 or 7, wherein the stretchable film is a plastic film of palletizable or stretchable polyethylene.

9. The method according to any of claims 6 to 8, wherein the filtering material is a porous material in cotton or cellulose or a material that is not thermal sensitive.

10. The method according to any of claims 6 to 9, wherein the adhesive is a double-sided adhesive tape, or an industrial adhesive compatible with plastic materials.