Temperature-Sensing Device for Hot Rolls
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-27
In certain copiers/printers utilizing hot roll fusing, the hot roll is in contact with the copy sheet during the fusing operation, but when a copy sheet is not present, the hot roll is physically moved away from its backup roll to prevent unnecessary wear. A device is described to measure and control the temperature of the hot roll in both of these positions, using a single temperature-sensing device. A desirable construction of the fuser allows the hot roll to be removed, for service and the like. The described device also facilitates removal of the hot roll. (Image Omitted) Temperature-sensing device 10 consists of shoes 11 and 12 mounted in housing 13. U.S. Patent 3,809,855 shows such an arrangement in greater detail. The curvature of shoes 11 and 12 mate with the outer circumference of hot roll 14.