Patent ID: 6606945
Filing Date: 2003-08-19
Classification: B41J,G03G,Y10S

Abstract:
A continuous medium printing apparatus for performing printing on both sides of a continuous medium, comprising:a conveyance system for conveying said continuous medium along a conveying path; a printing section for performing printing on said continuous medium being conveyed along said conveying path; a feed-force adjustment section for adjusting feed force to be applied to said continuous medium, said feed-force adjustment section being disposed on a downstream side of said conveying path from said printing section; and a feed-force control section for controlling said feed-force adjustment section so that said feed force to be applied to said continuous medium varies according to a printing condition, wherein said conveyance system has a pair of conveyor rollers disposed on a downstream side of the conveying path from said printing section so that they are opposite to each other with said continuous medium therebetween, feed force being applied to said continuous medium by rotating said pair of conveyor rollers with said continuous medium clamped therebetween: said feed-force adjustment section varies said feed force by adjusting pressure of said pair of conveyor rollers with respect to said continuous medium; said pair of conveyor rollers is constituted by a scuff roller which conveys said continuous medium in sliding contact with said continuous medium and a pinch roller which clamps said continuous medium in cooperation with said scuff roller; and said feed-force adjustment section varies said feed force by adjusting pressure of said pinch roller with respect to said scuff roller so that scuff pressure of said scuff roller with respect to said continuous medium is adjusted, wherein said feed-force adjustment section is constituted by an arm member which freely rotatably supports said pinch roller and is pivotable on an arm shaft disposed in parallel with a rotating shaft of said pinch roller; a lever member which is pivotable on a lever shaft disposed in parallel with said rotating shaft of said pinch roller; an elastic member for applying said pressure to said pinch roller, said elastic member being interposed between said arm member and said lever member; and a drive mechanism which drives said lever member to rotate on said lever shaft in order to adjust said scuff pressure, by adjusting a rotational angle of said lever member.