×

Test instrument

  • US 5,397,537 A
  • Filed: 12/08/1993
  • Issued: 03/14/1995
  • Est. Priority Date: 09/08/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. A test instrument on which a specimen is spread for being measured by a measuring device, comprising:

  • a base member having a first opening for passing a specimen,a second opening in said base member,a flat specimen spreading layer obtained from flat material and having a first portion of a first surface thereof which is exposed to said first opening and a second portion of said first surface which is not exposed to said first opening,a flat reagent layer obtained from flat material and being in contact with a second surface of said specimen spreading layer,a flat light-transmissive layer obtained from flat material in contact with said reagent layer,said second opening provided on an opposite side of said base member than said first opening, at which second opening measurement is performed by a measuring device,said second opening is smaller than said first opening,a flat absorbing layer provided in direct contact with the second portion of the first surface of said flat specimen spreading layer in order to absorb excess specimen which has been collected on said flat specimen spreading layer while allowing said first portion to remain exposed to said first opening, thus allowing said flat specimen spreading layer to be exposed to atmosphere for quickly drying said reagent layer, and wherein an edge portion of said second opening is chamfered with a predetermined angle to allow a wider optical path transmitted from the measuring device.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×