公开(公告)号：US20090066006A1

公开(公告)日：2009-03-12

申请号：US12164267

申请日：2008-06-30

Applicant: Kang-woo LEE ,  Kwon-cheol Lee

Inventor： Kang-woo LEE ,  Kwon-cheol Lee

IPC: B65H7/00

CPC classification number: B65H7/04 ,  B65H2405/1117 ,  B65H2511/212 ,  B65H2511/30 ,  B65H2551/20 ,  B65H2553/612 ,  B65H2801/06 ,  B65H2220/01 ,  B65H2220/11 ,  B65H2220/03

Abstract: A medium feeding unit having an improved structure for sensing that the number of print media loaded onto a loading plate is equal to or exceeds a predetermined remaining number, and an image forming apparatus having the same. The medium feeding unit includes a sensor that outputs sensing signals having different voltages according to quantities of received light. The medium feeding unit also includes a plurality of actuators that sense the number of print media on a loading plate, differentially intercept the sensing area of the sensor thus changing the voltage level of the sensing signal, and therefore signal the medium feeding unit when the number of print media on the loading plate falls below the predetermined remaining number.

Abstract translation: 一种具有改进结构的介质供给单元，用于感测加载到装载板上的打印介质的数量等于或超过预定剩余数量，以及具有该剩余数量的图像形成装置。 介质供给单元包括根据接收到的光量输出具有不同电压的感测信号的传感器。 介质馈送单元还包括多个致动器，其感测加载板上的打印介质的数量，差分地截取传感器的感测区域，从而改变感测信号的电压电平，并且因此当数字 的装载板上的打印介质落在预定剩余数量以下。