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Browse Prior Art Database

ULTRASONIC PAPER SIZE SENSING SYSTEM

IP.com Disclosure Number: IPCOM000027378D
Original Publication Date: 1996-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 55K

Publishing Venue

Xerox Disclosure Journal

Abstract

Typically, copiers and printers detect and sense the size of the paper sheets being loaded into the paper trays thereof by mechanically actuated sensors associated with the repositioning of the side and/or end guides in the tray, which are repositioned when sheets of different size are loaded into the tray. Otherwise, the size of the sheets being utilized must be entered into the controller software for the copier/printer by other means. It is suggested here that ultrasound sensors be used to detect the position of the edge of the stack of sheets relative to a vertical stationary wall or other soundwave reflectors on the side of the tray. As with other ultrasound protectors, the return time of the acoustic signal can be equated to a given distance and thus equated to a given paper size here. No mechanical switches, (subject to wear contamination), are required, in that the ultrasonic system can be completely solid state and mounted on the two orthogonal walls of the paper tray which are stationary, opposing the two movable paper side guides in the tray, which can provide the soundwave deflectors.

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XEROX DISCLOSURE JOURNAL

ULTRASONIC PAPER SIZE SENSING SYSTEM
James S. Stoll
Robert J. Isernia
John M. Shura

Proposed Classification
U. S. C1.271/009.06 Int. C1. B65h

Typically, copiers and printers detect and sense the size of the paper sheets being loaded into the paper trays thereof by mechanically actuated sensors associated with the repositioning of the side and/or end guides in the tray, which are repositioned when sheets of different size are loaded into the tray. Otherwise, the size of the sheets being utilized must be entered into the controller software for the copier/printer by other means. It is
suggested here that ultrasound sensors be used to detect the position of the edge of the stack of sheets relative to a vertical stationary wall or other soundwave reflectors on the side of the tray. As with other ultrasound protectors, the return time of the acoustic signal can be equated to a given distance and thus equated to a given paper size here. No mechanical switches, (subject to wear contamination), are required, in that the ultrasonic system can be completely solid state and mounted on the two orthogonal walls of the paper tray which are stationary, opposing the two movable paper side guides in the tray, which can provide the soundwave deflectors.

DP5465

XEROX DISCLOSURE JOURNAL - Vol. 21, NO. 4 July/AuguSt 1996 253

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254 XEROX DISCLOSURE JOURNAL - Vol. 21, NO. 4 July/August 1996

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