| 摘要 |
Disclosed is a pressure developing device having a pair of pressure rollers for pressurizing a photo and pressure sensitive recording sheet and a developing sheet in an overlapped state, the device comprising a plurality of spring members for supplying a variable push force to the pair of pressure rollers and control means for controlling the means for supplying a push force so as to pressurize the central portion of the recording sheet and the developing sheet greater than the side portion. Thus, the photo and pressure sensitive sheet and/or the developing sheet is prevented from being wrinkled.
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