Patent ID: 8070468
Filing Date: 2011-12-06
Classification: B29B,B29C

Abstract:
1. A sheet film forming roll, comprising: a center rotary shaft rotatably supported by bearing members; fixed end plates concentrically disposed in two locations which are away from each other in an axial direction of the center rotary shaft, respectively; an external cylinder made of a metal film, and rotatably supported, at two ends thereof, by the respective fixed end plates, the external cylinder being concentric with the center rotary shaft; and a plurality of rolling rubber rolls each rotatably supported, at two ends thereof, by the respective fixed end plates, the plurality of rolling rubber rolls being in sliding contact with an outer peripheral surface of the center rotary shaft, and being in sliding contact with an inner peripheral surface of the external cylinder, wherein the rolling rubber rolls divide an annular space between the external cylinder and the center rotary shaft into a plurality of heating medium chambers arranged in a circumferential direction of the sheet film forming roll and adapted to receive a heating medium, and at least one of the plurality of heating medium chambers is provided with at least one of a heater which uses electricity as its heat source and a heater which uses steam as its heat source.