Patent ID: 6489171
Filing Date: 2002-12-03
Classification: G01N,Y10T

Abstract:
A method for applying a chemical to a tissue sample, comprising:providing a cassette including an endless strip, the endless strip having a multiplicity of chemical containing capsules thereon, the cassette including means to move said endless strip; placing the tissue sample on a specimen slide; placing a cover plate over the specimen slide, wherein a head space exists between the specimen slide and the cover plate; inserting into the cassette the specimen slide to a point where the head space is adjacent to one of the multiplicity of chemical-containing capsules of the endless strip; forcing by pressure a first chemical into the head space, thereby allowing the first chemical to contact the tissue sample; moving the endless strip such that a second chemical containing capsule is adjacent to the head space of the slide; and forcing by pressure a second chemical into the head space, thereby positively displacing at least a portion of the first chemical out of the head space.