Browse Prior Art Database

Original Publication Date: 1991-Apr-30
Included in the Prior Art Database: 2004-Apr-05

Publishing Venue

Xerox Disclosure Journal


A self stripping fuser roll structure for use in electrophotographic printing and copy machines is disclosed. A fuser roll is frequently used to permanently fix a developed toner image to a copy sheet. Stripping fingers in contact with the fuser have been used to separate the copy sheet from the fuser roll. Stiffer copy sheet papers are usually easier to strip from the fuser roll than more flexible light weight papers. Greater rigidity of the stiffer papers prevents the copy paper from wrapping around the fuser roll. Corrugating light weight structures, particularly flat sheets, is an effective solution to increasing stiffness properties. A self stripping fuser roll structure which imparts additional stiffness to the copy sheet during processing is shown in the Figure (not drawn to scale). The fuser structure is constructed with from about 3 to about 6 mils of corrugation or surface undulation that imparts a 4 to 10 fold increase in sheet stiffness during fusing. A pressure roll having complementary and matching surface corrugation may optionally be used in the fuser structure. The corrugated fuser structure is particularly useful for soft roll fuser applications and additionally acts to prevent wrinkling of the copy sheet.