Analyzing tool with exhaust port

• US 20060228254A1
• Filed: 03/15/2004
• Published: 10/12/2006
• Est. Priority Date: 03/14/2003
• Status: Abandoned Application

• Current Assignee: ARKRAY, Inc
• Original Assignee: ARKRAY, Inc
• Inventors: Kobayashi, Taizo, Kusaka, Yasuhide
• Application Number:
  US10/548,894
• Publication Number:
  US 20060228254A1
• Time in Patent Office: Days
• US Class Current: 422/56
• CPC Class Codes: G01N 27/3272 Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels optical biosensors G01N33/52

Abstract

The invention provides a vented analyzing tool including a flow path provided on a substrate so as to move a specimen in a specific direction. The flow path has a predetermined dimension in a widthwise direction orthogonal to the specific direction when viewed thicknesswise of the substrate. The analyzing tool further includes a discharge port through which gas inside the flow path is vented. An edge of the discharge port on an upstream side in the moving direction of the specimen includes a rectilinear portion extending in the widthwise or generally widthwise direction. The flow path is constituted so as to cause a central portion of the specimen in the widthwise direction to move faster than the remaining portion thereof.

Claims

1. A vented analyzing tool, comprising a flow path provided on a substrate so as to move a specimen in a specific direction;

the flow path having a predetermined dimension in a widthwise direction orthogonal to the specific direction when viewed thicknesswise of the substrate, and the analyzing tool further including a discharge port through which gas inside the flow path is vented;

wherein an edge of the discharge port on an upstream side in the moving direction of the specimen includes a rectilinear portion extending in the widthwise or generally widthwise direction.

2. The vented analyzing tool according to claim 1, wherein the flow path is designed to cause a central portion of the specimen in the widthwise direction to move faster than remaining portions thereof.

3. The vented analyzing tool according to claim 1, wherein the rectilinear portion has a dimension equal or generally equal to, or larger than the widthwise dimension of the flow path.

4. The vented analyzing tool according to claim 1, wherein the discharge port is polygonal.

5. The vented analyzing tool according to claim 2, further comprising a cover stacked on the substrate, so that the substrate and the cover define the flow path;

wherein the cover is provided with a through-hole penetrating in the thicknesswise direction to constitute the discharge port.

6. The vented analyzing tool according to claim 5,

wherein the cover is stacked on the substrate via a spacer;

the spacer also defines the flow path together with the substrate and the cover, and

a portion of the flow path corresponding to the spacer is more hydrophobic than portions corresponding to the substrate and the cover.

7. The vented analyzing tool according to claim 1, wherein the flow path moves the specimen by capillary action.

8. A vented analyzing tool, comprising a flow path provided on a substrate so as to move a specimen in a specific direction;

the flow path having a predetermined dimension in a widthwise direction orthogonal to the specific direction when viewed thicknesswise of the substrate, the analyzing tool further including a discharge port through which gas inside the flow path is vented;

wherein the flow path is designed so as to cause a central portion of the specimen in the widthwise direction to move faster than remaining portions thereof, and

a central portion of an edge of the discharge port on an upstream side in the moving direction of the specimen is concave toward a downstream side in the moving direction of the specimen, with respect to the widthwise end portions.

9. The vented analyzing tool according to claim 8, wherein the concave portion is arcuate.

10. The vented analyzing tool according to claim 8, further comprising a cover stacked on the substrate, so that the substrate and the cover define the flow path;

wherein the cover is provided with a through-hole penetrating in the thicknesswise direction thus to constitute the discharge port.

11. The vented analyzing tool according to claim 10,

wherein the cover is stacked on the substrate via a spacer;

the spacer also defines the flow path together with the substrate and the cover, and

a portion of the flow path corresponding to the spacer is more hydrophobic than portions corresponding to the substrate and the cover.

12. The vented analyzing tool according to claim 8, wherein the flow path moves the specimen by capillary action.

13. A vented analyzing tool, comprising a flow path provided on a substrate so as to move a specimen in a specific direction;

the flow path having a predetermined dimension in a widthwise direction orthogonal to the specific direction when viewed thicknesswise of the substrate, and further including a discharge port through which a gas inside the flow path is discharged;

wherein a portion of the edge of the discharge port on an upstream side in the moving direction of the specimen conforms in shape to a front end portion of the specimen moving inside the flow path when viewed thicknesswise of the substrate.

14. The vented analyzing tool according to claim 13, wherein the flow path moves the specimen by capillary action.

15. A vented analyzing tool, comprising a flow path provided on a substrate so as to move a specimen in a specific direction;

the flow path having a predetermined dimension in a widthwise direction orthogonal to the specific direction when viewed thicknesswise of the substrate, and the analyzing tool further including a discharge port through which a gas inside the flow path is vented;

wherein the flow path is constituted so as to cause a central portion of the specimen in the widthwise direction to move faster than remaining portions thereof, and

wherein the flow path includes one or more stoppers located at an end portion including a portion corresponding to the discharge port, so as to block a flow of the specimen at end portions in the widthwise direction inside the flow path.

16. The vented analyzing-tool according to claim 15, further comprising a cover stacked on the substrate via a spacer provided with a slit, so that the substrate, the spacer and the cover define the flow path;

wherein the one or more stoppers are formed by making the slit narrower in the widthwise direction at a position close to the discharge port, inside a portion defining the flow path, than in a portion close to an intake port of the specimen.

17. The vented analyzing tool according to claim 15, wherein the one or more stoppers include a first stopper and a second stopper projecting in the widthwise direction toward an inner portion of the flow path, so as to oppose each other with an interval.

18. The vented analyzing tool according to claim 17, wherein the first and the second stoppers include a rectilinear portion on an upstream side in the moving direction of the specimen, extending in the widthwise or generally widthwise direction.

19. The vented analyzing tool according to claim 17, wherein the first and the second stoppers include an arcuate portion, on an upstream side in the moving direction of the specimen.

20. The vented analyzing tool according to claim 15, wherein the flow path moves the specimen by capillary action.