Paper tray size sensing mechanism

摘要

A media supply tray includes a Bowden cable attached to side paper guides. Movement of one side guide causes the opposing side guide to move in the opposite direction. When the side guides are moved, a flag attached to the cable moves and can be detected to provide accurate feedback to a printer regarding media size in the tray.

主权项

1. A method for sensing sheet size in a tray positioned within a xerography device, comprising:
providing said xerographic device with a sensor, said sensor including a series of contacts representing different sheet sizes; providing a tray for receiving sheets therein, said tray having a sheet support surface with front, back and side members enclosing said sheet support surface; providing first and second side guides positioned adjacent said side members; providing a Bowden cable connected to said side guides such that movement of said side guides moves said Bowden cable; and providing a flag connected to said Bowden cable wherein movement of said side guides moves said flag into contact with a specific one of said series of contacts on said sensor and thereby indicate the size of sheets within said tray.