Patent ID: 6925920
Filing Date: 2005-08-09
Classification: B26D,G01N,Y10S,Y10T

Abstract:
1. In a microtome for the production of tissue sections in histology, in which an object to be sectioned is passed past a stationary knife for production of the tissue sections, the improvement comprising: the stationary knife comprising a disk-shaped knife, which has the shape of a regular polygon, having a perimeter with edges that comprise cutting edges, and a knife holder with a knife receiver for arresting and positioning said disk-shaped knife, wherein said knife is received in said knife receiver, wherein said knife receiver has a shaft about which said knife is rotatable and, whereby by rotation of said knife about said shaft, said knife is moved into cutting positions wherein various ones of said cutting edges are brought into a working location to cut said object, and wherein said knife receiver further has a depression in which said knife is received and for protection of said cutting edges, with an opening at said working location that exposes only a selected one of said cutting edges and serves for working use of said selected one of said cutting edges, wherein the perimeter of said knife is completely surrounded by a wall of said depression except at said working location.