Patent ID: 8697012
Filing Date: 2014-04-15
Classification: G01N

Abstract:
1. A high-speed automatic dispensing apparatus with a replaceable dispensing head, comprising: a dispensing head including a plurality of pipettes, a pipette head to which one end of a plunger extending to pass through each pipette is fixed, and a head body part abutting against the pipette head and allowing the pipettes to pass therethrough, a head holder to which the dispensing head is detachably fixed, a pipette head moving mechanism vertically moving the pipette head, a drive mechanism horizontally and vertically moving the head holder, and a tip releasing plate abutting against a lower surface of said head body part and allowing said pipettes to pass therethrough, and configured to move downward, thereby releasing tips from said pipettes, wherein said head holder comprises a pipette head holder to which the pipette head is detachably fixed, and a body holder to which the head body part is detachably fixed, wherein the pipette head is vertically moved by vertically moving the pipette head holder with the pipette head moving mechanism, wherein said head body part, said pipette head and said tip releasing plate are withdrawn and removed as an integral unit from the head holder, wherein said pipette head includes a pushing member to move said tip releasing plate downward, one end of said pushing member being fixed to the pipette head, a body of said pushing member being inserted into the head body part and passing therethrough, said pushing member having such a length that another end of said pushing member abuts against said tip releasing plate at a position where said pipette head is advanced beyond a position for discharging a liquid material, and wherein said tip releasing plate and said head body part are interconnected by springs.