Paper feeder for photocopier or the like
专利汇可以提供Paper feeder for photocopier or the like专利检索，专利查询，专利分析的服务。并且PURPOSE: To keep the thrusting force of a paper feed roller at a constant level independently of paper feed conditions and the progress in paper feed, by setting the weight and gravity center of a movable auxiliary bottom plate provided in a cassette and the stiffness constant of a spring for swinging a bottom plate push-up arm, so that the weight, gravity position and stiffness constant meet prescribed conditions.
CONSTITUTION: The torque T and stiffness constant (a) of a spring 11 are determined in accordance with formulae 1, 4 to optimize the thrusting force of a paper feed roller 3 for copying papers of one kind in size, thickness and weight. The weight P
3 of an auxiliary bottom plate 7, the position l
5 of a pin 7a, the gravity center l
3 of the plate 7, the gravity center l
2 of a copying paper stack 5, etc. are adjusted in combination so that the thrusting force P
1 of the paper feed roller 3 remains constant even if the weight of the copying paper stack 5 alters due to the change in the size and weight of each copy paper. The constant (b) of the formula 4 is determined by the unit weight and gravity center of the copying paper and the fulcrum of the auxiliary bottom plate 7. The thrusting force of the paper feed roller is thus kept constant despite the change in the properties of the copying paper and the fluctuation due to the progress in paper feed.
COPYRIGHT: (C)1981,JPO&Japio，下面是Paper feeder for photocopier or the like专利的具体信息内容。
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