in main scanning direction, e.g. synchronisation of line start or picture elements in a line

Full Title

Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof > Scanning arrangements (H04N1/387 takes precedence) > Detection, control or error compensation of scanning velocity or position ( H04N1/17 take precedence) > in main scanning direction, e.g. synchronisation of line start or picture elements in a line