Sheet feed tractor
Sheet feeder for feeding continuous print paper having sprocket
Sheet feeding device having a paper presser plate to which a var
Sheet material pin feed tractor mechanism
Sheet separating structure
Sheet-feed tractor providing pin or friction feed
Sheet-feed tractor with eccentric clamping device
Sheet-feed tractor with resilient spring clamping subassembly
Structures of driving and driven sprockets and belt reception ro
Successive sheet feed mechanism
Tractor apparatus
Tractor apparatus
Tractor apparatus for feeding paper
Tractor drive for an office machine
Tractor feed assembly tensioning bar
Tractor feed for perforated webs
Tractor feeder for printer
Tractor for engaging and advancing a web of paper
Tractor mechanism compensating for paper taper
Tractor mechanism for printers