THE USE OF A HIDDEN ANTIGEN OF INTESTINAL WORMS FOR PREPARING A VACCINE AND STIMULATION METHOD OF IMMUNITY RESPONSE

摘要

A print head comprises a body 6 (which includes a droplet stimulation actuator), an intermediate component (5) (which includes a cavity which defines an ink chamber in communication with said stimulation actuator) and a nozzle plate (2), and is characterised in that the securing bolts 8 pass through respective spacer sleeves (9) which sleeves are located in clearance holes in the intermediate component (5) and which are slightly larger than the thickness of the said component (5). It is stated that the arrangement allows the seals ('O' rings as shown, but may be gaskets if suitable resiliency) to be compressed sufficiently to seal but does not allow over tightening of the joint faces against each other. The use of acoustic absorbent material between the joint faces is disclosed. A combined 'O' ring plus gasket seal is mentioned. IMAGE