An apparatus for use with a sewing machine which has a reciprocating needle which moves in cooperation with a pick to sew materials such as furskins into sections at a sewing zone comprises a carriage which is mounted alongside the machine and is movable through a sewing zone and which is advantageously driven from the sewing machine through a drive means which may be selectively connected to the carriage for moving it. A clamp is employed for clamping the material or the furskin therein which is to be joined from an initial skin portion or section and it is positioned on the carriage for movement with the carriage past the sewing zone for sewing thereof to a previously formed section which is held in a holding bracket which is carried by the carriage for movement therewith through the sewing zone at the same time as the furpiece carried in the clamp.