Browse Prior Art Database

Original Publication Date: 1980-Jun-30
Included in the Prior Art Database: 2004-Apr-02

Publishing Venue

Xerox Disclosure Journal


In an electrophotographic printing machine, the powder image is permanently affixed to the sheet of support material, i.e., the copy paper, by being passed through a pair of heated rollers. Heretofore, the rollers were fixed and remained stationary. In order to increase the throughput speed, it would be highly desirable to both rotate the rollers as the copy paper passes therebetween as well as translating the rollers in the direction of movement of the copy paper. As shown in Figure 1, the copy paper can advance between rollers 12 and 14. Rollers 12 and 14 rotate in the direction of arrows 16 and 18, respectively. Figure 2 depicts rollers 12 and 14 translating in the direction of movement of copy paper 10 as indicated by arrow 20. The fuser rollers translate at one-half the copy paper speed. Hence, the fuser rollers move a distance equal to one-half the length of the copy paper. Figure 3 shows rollers 12 and 14 at the end of travel with the copy paper 10 exiting therefrom. Figure 4 illustrates rollers 12 and 14 returning to their initial position with copy paper 10 advancing to the exit or catch tray for subsequent removal by the machine operator. During the operation, rollers 12 and 14 translate by rolling on base plate 22. This produces the translation of fuser rollers 12 and 14 in the same direction as the movement of copy paper. After the copy paper exits fuser rollers 12 and 14, rollers 12 and 14 rotate in the opposite direction to translate back to their initial position as indicated by arrow 24. During the return translation, the velocity is arbitrary and may be as fast as desired.