Microorganism culture sheet and manufacturing method therefor

Patent metadata

Field	Value
Publication number	US-11124757-B2
Application number	US-201013383669-A
Country	US
Kind code	B2
Filing date	Jul 14, 2010
Priority date	Jul 14, 2009
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

A microorganism culture sheet is provided which can limit the use of a costly cultivation material to a necessary portion, which has simple production at the time of manufacture, and can be simply and stably used by a user. The microorganism culture sheet of the present invention is a microorganism culture sheet comprising a base sheet, a culture layer formed on top of the base sheet, and a cover sheet that covers the culture layer, and the culture layer is pattern-formed with an application liquid comprising a polyvinylpyrrolidone and at least on selected from the group consisting of a gelling agent, a nutrient component, a color indicator, a selective agent and a substrate.

First claim

The invention claimed is:

1. A microorganism culture sheet comprising:
a flat base sheet,
a culture layer of a predetermined shape formed on top of the base sheet, a thickness of the culture layer formed on top of the base sheet when dry is 50 to 1000 μm,
a frame layer that surrounds the culture layer, is formed directly on top of the flat base sheet, is formed at an outer boundary of the culture layer, the frame layer having a flat surface where the frame layer is formed directly on top of the flat base sheet and a rounded convex surface where the frame layer contacts a film cover sheet, and
the film cover sheet contacts the rounded convex surface of the frame layer, covers the culture layer when closed, is adhered to a distal end of the base sheet, is made of plastic and has a thickness from 10 to 200 μm,
wherein the height of the frame layer is higher than the height of the culture layer by 100 to 1200 μm,
wherein the culture layer is formed by applying to the top of the base sheet, a liquid comprising a polyvinylpyrrolidone and at least one selected from the group consisting of a gelling agent, a nutrient component, a color indicator, a selective agent, and a substrate, and
wherein the base sheet is larger in area than the frame layer in a top view of the microorganism culture sheet.

2. The microorganism culture sheet according to claim 1 , wherein the application liquid comprises a polyvinylpyrrolidone and a gelling agent.

3. The microorganism culture sheet according to claim 1 , wherein the frame layer consists of a hydrophobic resin.

4. The microorganism culture sheet according to claim 1 wherein the base sheet and/or the cover sheet consists of a transparent plastic sheet.

5. The microorganism culture sheet according to claim 1 , wherein the base sheet is made of paper.

6. The microorganism culture sheet according to claim 1 , wherein the base sheet is made of synthetic paper and the cover sheet is made of a member selected from the group consisting of polyolefin and polyester.

7. The microorganism culture sheet according to claim 1 , wherein the cover sheet is waterproof and impermeable to water vapor.

8. The microorganism culture sheet according to claim 1 , wherein the cover sheet is adhered to the base sheet by a double sided adhesive tape.

9. The microorganism culture sheet according to claim 1 , wherein the cover sheet has two angled portions.

10. The microorganism culture sheet according to claim 1 , wherein the cover sheet has a specified component layer formed thereon as to face a culture layer formed on the base sheet.

11. A microorganism culture sheet comprising:
a flat base sheet,
a culture layer of a predetermined shape formed on top of the base sheet for culturing microorganisms, a thickness of the culture layer formed on top of the base sheet when dry is 50 to 1000 μm,
a frame layer formed directly on top of the flat base sheet, formed before forming the culture layer on the flat base sheet formed at an outer boundary of the culture layer, the frame layer having a flat surface where the frame layer is formed directly on top of the flat base sheet and a rounded convex surface where the frame layer contacts a film cover sheet, and
the film cover sheet, said film cover sheet contacts the rounded convex surface of the frame layer, is adhered at a distal edge portion of the base sheet for an operability of opening and closing of the cover sheet to cover the culture layer in a closed state and to lift off from the base sheet, except for the adhered edge portion, in an open state, and the film cover sheet is made of plastic and has a thickness from 10 to 200 μm,
wherein the height of the frame layer is higher than the height of the culture layer by 100 to 1200 μm.

12. The microorganism culture sheet according to claim 11 , wherein the cover sheet has a specified component layer formed thereon as to face a culture layer formed on the base sheet.

13. A microorganism culture sheet comprising:
a flat base sheet,
a culture layer of a predetermined shape formed on top of the base sheet, a thickness of the culture layer formed on top of the base sheet when dry is 50 to 1000 μm,
a frame layer that surrounds the culture layer, is adhered directly on top of the flat base sheet is formed at an outer boundary of the culture layer so that no gaps are formed between the frame layer and the culture layer, the frame layer having a flat surface where the frame layer is formed directly on top of the flat base sheet and a rounded convex surface where the frame layer contacts a film cover sheet, and
the film cover sheet contacts the rounded convex surface of the frame layer, covers the culture layer when closed, is adhered to a distal end of the base sheet, is made of plastic and has a thickness from 10 to 200 μm,
wherein the height of the frame layer is higher than the height of the culture layer by 100 to 1200 μm,
wherein the culture layer is formed by applying to the top of the base sheet, a liquid comprising a polyvinylpyrrolidone and at least one selected from the group consisting of a gelling agent, a nutrient component, a color indicator, a selective agent, and a substrate, and
wherein the base sheet is larger in area than the frame layer in a top view of the microorganism culture sheet.

14. The microorganism culture sheet according to claim 1 , wherein the thickness of the cover sheet is from 20 to 70 μm.

15. The microorganism culture sheet according to claim 11 , wherein the thickness of the cover sheet is from 20 to 70 μm.

16. The microorganism culture sheet according to claim 13 , wherein the thickness of the cover sheet is from 20 to 70 μm.

17. The microorganism culture sheet according to claim 1 , wherein the plastic of the cover sheet is made of polyolefins selected from the group consisting of polyethylene, polypropylene and the like, polyester, polyamide, polystyrene, polycarbonate, polyvinylchloride.

18. The microorganism culture sheet according to claim 11 , wherein the plastic of the cover sheet is made of polyolefins selected from the group consisting of polyethylene, polypropylene and the like, polyester, polyamide, polystyrene, polycarbonate, polyvinylchloride.

19. The microorganism culture sheet according to claim 13 , wherein the plastic of the cover sheet is made of polyolefins selected from the group consisting of polyethylene, polypropylene and the like, polyester, polyamide, polystyrene, polycarbonate, polyvinylchloride.

Assignees

• Baba Takuma
• Kinoshita Mai
• Saito Rui
• Ueki Tetsuji
• Kikkoman Corp

Inventors

• Baba Takuma
• Kinoshita Mai
• Saito Rui
• Ueki Tetsuji

Classifications

• G01N21/78

  producing a change of colour · CPC title

• C12M25/14

  Scaffolds; Matrices (in general C12N5/0068) · CPC title

• C12M23/38

  Caps; Covers; Plugs; Pouring means · CPC title

• C12N1/00 Primary

  Microorganisms; Compositions thereof (medicinal preparations containing material from protozoa, bacteria or viruses A61K35/66, from algae A61K36/02, from fungi A61K36/06; preparing medicinal bacterial antigen or antibody compositions, e.g. bacterial vaccines, A61K39/00); Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor · CPC title

• C12M23/10

  Petri dish (crystallising dishes B01L3/06) · CPC title