# US 5,706,937 A · Flexible dual-chambered container

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- Number: US 5,706,937 A
- Document ID: US5706937A
- Status: Granted
- Kind: A
- Application number: 08/617,162
- Filed: 1996-03-18
- Granted: 1998-01-13
- Earliest claimed: 1995-04-11
- Assignees: Nissho Corporation
- Inventors: Hitoshi Futagawa; Noriyoshi Yamamoto; Masanobu Iwasa
- Web page: https://patentgrep.com/patent/US5706937A

## CPC

- B32B 15/09: comprising polyesters
- A61J 1/2093: {Containers having several compartments for products to be mixed}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)}
- B32B 27/08: of synthetic resin
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/36: comprising polyesters
- B65D 81/3266: {separated by a common rupturable seal, a clip or other removable fastening device}
- A61J 1/10: Bag-type containers
- A61J 1/2024: {having peelable seals}
- B32B 2307/41: Opaque
- B32B 2307/412: Transparent
- B32B 2307/7244: Oxygen barrier
- B32B 2307/7265: Non-permeable
- B32B 2439/80: Medical packaging
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- A61J: CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES

## Abstract

A flexible and dual-chambered container includes a first frontal sheet fusion bonded to a first rear sheet to define a first chamber for containing, for example, a medical liquid. The first frontal sheet is a flexible and transparent sheet for intercepting water, moisture, and oxygen gas. The first rear sheet is a flexible composite sheet composed of aluminum foil and a water-absorbing stratum. A second frontal sheet is fusion bonded to a second rear sheet to define a second chamber for containing, for example, a medical liquid. The second frontal and rear sheets are joined to the first frontal and rear sheets so that the first and second chambers are isolated by a breakable or weak seal. An opaque and flexible cover sheet composed of aluminum foil is removably disposed on the first frontal sheet. When the weak seal is broken by manually compressing the second chamber, the first and second chambers are brought into liquid communication. Any residual amount of water or vapor can be eliminated from the container during manufacturing so that the dry drug contained therein is protected from oxygen, water, and light beams.

## Claims

### Claim 1

A flexible and dual-chambered container comprising:
a first frontal sheet fusion bonded to a first rear sheet to define a first chamber, said first frontal sheet being comprised of an outer layer, an inner layer, and a silica-coated intermediate layer, both the outer and inner layers being comprised of a polymer blend of two polyolefins having a limited affinity to each other, and said first rear sheet being a flexible composite sheet comprised of aluminum foil and a water-absorbing stratum;
a second frontal sheet fusion bonded to a second rear sheet to define a second chamber, said second frontal and rear sheets being joined to said first frontal and rear sheets so that said first and second chambers are isolated by a breakable seal; and
an opaque and flexible cover sheet removably disposed on said first frontal sheet, said cover sheet being comprised of a polyethylene terephthalate outer layer, a polyethylene inner layer, and an intermediate layer comprised of aluminum foil.

### Claim 2 (depends on 1)

The container of claim 1, wherein the first rear sheet is comprised of a polyethylene terephthalate outer layer, a polyolefin inner layer, and an intermediate layer comprised of aluminum foil and the water-absorbing stratum.

### Claim 3 (depends on 1)

The container of claim 1, wherein the intermediate layer of the cover sheet further comprises a water-absorbing stratum disposed inside the aluminum foil.

### Claim 4 (depends on 1)

The container of claim 1, wherein the first chamber contains a dry drug and the second chamber contains a medical liquid.

### Claim 5 (depends on 1)

The container of claim 1, wherein the first and second frontal sheets are formed of a single sheet, and the first and second rear sheets are formed of a single sheet.