Paper tray paper pressing device, multifunctional printer and paper tray paper pressing method

The invention provides a paper tray paper pressing device, a multifunctional printer and a paper tray paper pressing method. A platen pawl for a collator processing tray is in contact with top-layer paper on a paper tray to prevent subsequent printed pages from interfering with pages disposed on the paper tray. The platen pawl includes a gear that moves a portion of the platen pawl contacting thetop sheet along a substantially elliptical path from a retracted position to a forward platen position. After printing each sheet and placing it on top of the other of the sheets in the paper tray, the paper tray is lowered and the platen pawl continues to return to the retracted position along a substantially elliptical path. If the paper tray is pushed upward while the platen pawl is in the forward position, a rack gear associated with the paper tray engages a cylindrical gear of the platen pawl to return the platen pawl to the retracted position. 提供一种纸托盘压纸装置、多功能打印机及纸托盘压纸方法。用于整理器处理托盘的压纸棘爪与纸托盘上的顶层纸张接触，以防止后续打印页干扰设置在纸托