Toner fuser system having post-fuser media conditioner

US6272310A · kind A · utility

Assignee

• Lexmark International, Inc. · US

Inventors

• Bryan Michael Blair · Lexington, US
• Robert Leonard Burdick · Nicholasville, US
• James Allen Lokovich · Georgetown, US
• Philip Jerome Heink · Lexington, US
• Michael David Maul · Lexington, US
• Matthew McKay · Henderson, US
• Edward Alan Rush · Lexington, US

Key dates

• Filing date: Oct 20, 1999
• Grant date: Aug 7, 2001
• Expiry date: Oct 20, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G2215/2074
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A toner fuser system suitable for producing high quality color transparencies is provided. The fuser system includes a media conditioning assembly located directly downstream of a fuser assembly, which may be a roll fuser or an instant-on belt fuser. The conditioner assembly includes a convective heat source, a heating zone, and a convective circulation path past the heat source and the heating zone to provide convective heat transfer to a transparency in the heating zone. A transparency (or other media) with toner to be fused travels on a media path first through the fuser assembly and then through the heating zone of the conditioner assembly. The fuser assembly causes toner to adhere to the transparency just well enough to allow the transparency to pass into the conditioner. In the conditioner, the toner is reheated, thereby causing the surface of the toner to reflow into a smooth, glossy, and uniform surface that increases light transmission efficiency of color transparencies. Additionally, the system eliminates the need for silicone oil, which is used in some prior art systems to prevent sticking of the transparency to the fuser assembly.