Stitchers
AssigneeXerox Corporation
InventorRonald E. Stokes
Life of this patent
Estimating the term…
Abstract
A wire stitcher includes a cutter for cutting a length of wire W from a supply thereof and a stitcher head having a former and driver for forming and driving the length of cut wire for binding a set SS of sheets. The length of cut wire which is presented to the head by a wire advancing and cutting mechanism. The mechanism comprises a first wire gripper, which advances the wire through a fixed distance, and a compensating mechanism comprising a second wire gripper and a cutter block. These are moved towards each other to increase the wire length symetrically relative to the driver as a function of set thickness by an actuator connected to a set clamping device.
Claims21
A wire stitcher apparatus having a cutter for cutting a length of wire from a supply thereof to form a staple and a stitcher head for forming and driving the length of cut wire for binding a set of sheets, the improvement comprising first means for advancing the wire through a fixed distance past the cutter and separate independent second means for further advancing the wire and said second means also positioning the cutter approximately equal to the thickness of the set.
A wire stitcher apparatus having a cutter for cutting a length of wire from a supply thereof to form a staple and a stitcher head for forming and driving the length of cut wire for binding a set of sheets, the improvement comprising first means for advancing the wire through a fixed distance past the cutter and second means for further advancing the wire and positioning the cutter approximately equal to the thickness of the set, and a first wire gripper for advancing the wire past the cutter by said fixed distance and a second wire gripper for further advancing the wire by a distance dependent upon the thickness of the set, said cutter and said second wire gripper are slidably mounted and respectively connected to different ones of a pair of racks arranged to be driven by a common pinion in opposite directions, said pinion being rotatable by said actuator proportionately to the set thickness.
Dependencies are inferred from the claim text.