Patent ID: 6149147
Filing Date: 2000-11-21
Classification: B65H

Abstract:
A paper pickup device for a laser beam printer, comprising:a paper feeding cassette having two sidewalls, each sidewall having a first curved slot in a frontal portion of said sidewall and each sidewall having a second curved slot formed above said first curved slot;a knock-up plate in the paper feeding cassette;a shaft installed between said sidewalls of said paper feeding cassette so as to protrude from said first curved slots;a connecting member rotatably connected to said sidewalls of said paper feeding cassette;a first engaging portion extending upward from said connecting member;a second engaging portion connected to and horizontally spaced from said first engaging portion;a subplate extending from said connecting member, said subplate being under said knock-up plate;a link lever which is shaft-shaped, disposed between said sidewalls;a spring-fixing portion extending downward from said link lever;a rib extending downward from an end of said link lever, said rib being inserted into said second slot;a first tension coil spring having one end connected to said first engaging portion and a second end connected to said shaft so as to press said subplate upward against said knockup plate; anda second tension coil spring having one end connected to said second engaging portion and the other end connected to said spring-fixing portion of said link lever so as to additionally press said subplate upward against said knock-up plate.