A multi channel head device 1, wherein said positioning member, said load spring member and said head holder are each provided with positioning indicia, and said {HEAD ~ positioning spring member} and {TAIL ~ said load spring member} are aligned with each other in superposed manner and mated as one piece in said head holder 
A multi channel head device 1 , wherein said positioning member , said load spring member and said head holder are each provided with positioning indicia , and said { HEAD ~ positioning spring member } and { TAIL ~ said load spring member } are aligned with each other in superposed manner and mated as one piece in said head holder
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