Test strip supply apparatus and analyzer using same

• US 5,470,533 A
• Filed: 11/09/1993
• Issued: 11/28/1995
• Est. Priority Date: 11/11/1992
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Terayama, Takao, Shindo, Isao, Okayama, Masao, Kai, Susumu, Mutou, Shigeo
• Primary Examiner(s): Warden, Robert J.
• Assistant Examiner(s): BHAT, NINA NMN
• Application Number:
  US08/149,084
• Time in Patent Office: 749 Days
• Field of Search: 422/62, 422/63, 422/66, 422/68.1, 436/44, 436/46, 436/48, 436/171
• US Class Current: 422/63
• CPC Class Codes: B65G 47/1428 rotating movement
• CPC Class Codes: G01N 2035/00089 Magazines
• CPC Class Codes: G01N 2035/00108 Test strips, e.g. paper
• CPC Class Codes: G01N 2035/00168 Manufacturing or preparing test elements
• CPC Class Codes: G01N 2035/00455 Controlling humidity in analyser
• CPC Class Codes: G01N 35/00029 provided with flat sample substrates, e.g. slides G01N35/028 takes precedence
• CPC Class Codes: Y10T 436/110833 Utilizing a moving indicator strip or tape
• CPC Class Codes: Y10T 436/112499 with sample on test slide
• CPC Class Codes: Y10T 436/114165 with step of insertion or removal from test line

Abstract

A test strip supply apparatus comprises a cylindrical container having an elongate test strip fitting penetration slot formed in its side wall, a container support having a semicylindrical concave surface formed in its upper portion and a test strip take-out hole formed at the center of the concave surface for allowing a test strip dropped from the penetration slot of the container to pass therethrough, and a test strip transfer stage for receiving the test strip dropped from the penetration slot and transferring it. A test strip reversing function is also provided such that during the transfer of the test strip by the transfer stage, optical means determines whether the test strip is placed facing properly or not and, if the back surface is on the upper side, the test strip is reversed upside down before further transfer.

Claims

1. A test strip supply apparatus comprising a container for containing elongate test strips each having reaction layers impregnated with reagents, said container having a penetration slot through which said test strips are to be successively delivered out Of said container, a guide member including an extended portion which extends over said penetration slot of said container and guiding said test strip in said container toward said penetration slot, and a pushing device for pushing said test strip into said guide member with relative movement between said container and said pushing device;

wherein said pushing device approaches the guide member in said container when said guide member moves in a first direction, and said pushing device goes away from said guide member when said guide member moves in a second direction opposite of said first direction.

2. A test strip supply apparatus according to claim 1, wherein said pushing device is movable back and forth to be moved outwardly of said container.

3. A test strip supply apparatus according to claim 1, wherein said pushing device includes a contact portion with said test strips and a fixed portion, said contact portion being able to enter an inner space of said container and said fixed portion being fixed outside said container.

4. A test strip supply apparatus according to claim 3, wherein said relative movement is effected in such a manner that said pushing device is held at a predetermined position and said container is reciprocally rotated.

5. A test strip supply apparatus according to claim 3, wherein said pushing device is arranged such that the depth by which said contact portion can enter the inner space of said container will not exceed the height of said guide member at its upper end.

6. A test strip supply apparatus according to claim 3, wherein said pushing device includes a plurality of said contact portions.

7. A test strip supply apparatus according to claim 1, wherein said guide member is formed to project in its lower central surface, and the gap between said projected surface and an inner wall of said container is in the range of 1 to 2 times the thickness of said test strips.

8. A test strip supply apparatus according to claim 7, wherein the inlet height of said guide member with respect to inner wall of said container is less than the width of said test strips.

9. A test strip supply apparatus comprising a movable container having a penetration slot through which each of test strips put in said container is to be successively delivered out of said container, a guide member formed in said movable container guiding said test strip in said container toward said penetration slot, at least one of both side ends of said guide member at its inlet having a height larger than the height of a central portion of said guide member at its inlet, a pushing device for pushing said test strip into said guide member with movement of said movable container, and a drive device for driving said movable container such that the maximally approached distance between an innermost wall surface of said guide member and a test strip contact surface of said pushing device is almost equal to the width of said test strips.

10. An analyzer comprising a container for containing a plurality of test strips each having reaction layers impregnated with reagents, said container having a penetration slot through which each of said test strips is to be successively delivered out of said container, a guide member including an extended portion which extends along an inner wall of said container and guiding said test strip in said container toward said penetration slot, a pushing device for pushing said test strip into said guide member with relative movement between said container and said pushing device, wherein said pushing device approaches the guide member in said container when said guide member moves in a first direction, and said pushing device goes away from said guide member when said guide member moves in a second direction opposite of said first direction, a transfer device for transferring said test strip delivered through said penetration slot in said test container to a take-out position, and a carrying device for gripping said test strip at said take-out position, dipping said test strip into a sample liquid while gripping said test strip, and then setting said test strip lifted out of said sample liquid into a photometric device.