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IMPROVED WICK FOR DISPENSING FLUIDS IN ELECTROSTATIC COPYING DEVICES

IP.com Disclosure Number: IPCOM000023894D
Original Publication Date: 1979-Apr-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 375K

Publishing Venue

Xerox Disclosure Journal

Abstract

The present disclosure is directed to an improved wick material for dispensing fuser oil in electrostatic copying devices. In the prior art fusing systems, the release agent or release fluid may be applied to the fuser member by means of a wick as described in U.S. Patents 3,718,116; 3,831,553; and 3,841,827. The wick is generally used to dispense silicone oil, functional siloxane fluids, mineral oil, and many other release fluids to the fuser member in the form of a pad overlying and in contact with the fuser member which is heated during operation. The wick assembly generally includes two different layers, a first layer in contact with the surface of the fuser member meters precise amounts of release fluid thereon while a second layer in contact with the first layer has high release fluid retention capabilities for supplying the first layer with the fluid, For example, the wick comprises a layer of Teflon which contacts the surface of the fuser roll and a second layer of Nomex which has its underside in contact with an applicator roll, the release fluid in a sump or some other fluid supply device or means. Teflon and Nomex are trademarks of E.I. duPont deNemours & Company.

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RE JOU RN A

IMPROVED WICK FOR DISPENSING FLUIDS Proposed Classification IN ELECTROSTATIC COPYING DEVICES U.S. Cl. 118/266
mt. Cl. B05c 11/00

The present disclosure is directed to an improved wick material for dispensing fuser oil in electrostatic copying devices. In the prior art fusing systems, the release agent or release fluid may be applied to the fuser member by means of a wick as described in U.S. Patents 3,718,116; 3,831,553; and 3,841,827. The wick is generally used to dispense silicone oil, functional siloxane fluids, mineral oil, and many other release fluids to the fuser member in the form of a pad overlying and in contact with the fuser member which is heated during operation. The wick assembly generally includes two different layers, a first layer in contact with the surface of the fuser member meters precise amounts of release fluid thereon while a second layer in contact with the first layer has high release fluid retention capabilities for supplying the first layer with the fluid, For example, the wick comprises a layer of Teflon which contacts the surface of the fuser roll and a second layer of Nomex which has its underside in contact with an applicator roll, the release fluid in a sump or some other fluid supply device or means. Teflon and Nomex are trademarks of E.I. duPont deNemours & Company.

Polytetrafluoroethylene is preferred as a cover material because of its inherent low surface energy which prevents toner adhesion and, therefore, minimizes wick clogging. However, because of the use of the first layer and the second layer of wick material in the prior art wicking articles, it has been found that there are several disadva...