Fusing roller for copying machine

Abstract

Abstract PURPOSE:To enhance the mechanical strength of a body and shorten the warm- up time, by forming a slit throughout the overall length of a reinforcing metallic cylinder in the axial direction and arranging an induction coil concentrically into the body where a thin heating metallic cylinder is fitted around this reinforcing metallic cylinder. CONSTITUTION:A linear slit 4 is formed throughout the overall length of a reinforcing metallic cylinder 2 in the axial direction of the cylinder so that an induced current is not flowed into the cylinder 2 by the magnetic field generated by an induction coil 3. Many recessed grooves 5 extending in the circumferential direction of the cylinder 2 are formed in parallel in the axial direction of the cylinder 2 in all regions of the outside circumference of the reinforcing metallic cylinder 2 for the purpose of preventing the heat conduction from a heating thin metallic cylinder 1 to the reinforcing metallic cylinder 2, and the heat conduction from the heating metallic cylinder 1 to the reinforcing metallic cylinder 2 is stopped by air in recessed grooves 5. Thus, the mechanical strength of the roll body is enhanced, and the warm-up time is shortened.

Inventors

• 👤 Hitoshi Nagoshi
• 👤 名越　均
• 👤 Taizo Kimura
• 👤 泰三 木村
• 👤 Kazunari Takashima
• 👤 高島　一成

Bibliographic Details