Image recording apparatus using pressure sensitive sheet

A sheet feed mechanism for feeding a web-like pressure-sensitive recording sheet for use in an image recording apparatus which comprises an exposure unit, and a pressure developing unit disposed at a downstream side of said exposure unit, said pressure-sensitive recording sheet being selectively superposed with a developer sheet at said pressure developing unit, said sheet feed mechanism comprising;

• a supply roll for supplying said pressure-sensitive recording sheet, said pressure-sensitive recording sheet having a pressure-sensitive image bearing layer on one surface thereof and being fed to pass between said pressure developing unit, and said developer sheet being selectively fed to pass between said pressure developing unit in superposed relation to said pressure-sensitive image bearing layer;
• a takeup roll for winding said pressure sensitive recording sheet;
• and,
• a friction roller held against a surface of said pressure sensitive recording sheet opposite to said image bearing surface and rotatable at a constant speed for frictionally feeding said recording sheet.