Pressure control for instant image camera - has temp. sensitive spring for pressure roller compensation control

摘要

The temperature compensated drive for the process rollers of an instant camera, in which the pressure between the rollers is controlled by a spring which either deforms with temperature or which is braced on temperature sensitive supports. The pressure is reduced as the viscosity increases with lower temperature so that the drive speed is constant. The system ensures that the process is temperature compensated for high quality prints. An alternate system uses a hydraulic or pneumatic pressure control for the spring support. No other controls are required.