Method and apparatus for controlling the transport and the posit

Details Method and apparatus for controlling the transport and the posit Method and apparatus for controlling the transport and the posit

1994-06-14

1995-09-26

Grimley, A. T.

Photocopying

Contact printing

Light boxes

356385, 25055929, G03G 2100

Patent

active

054538254

ABSTRACT:
Method and apparatus for controlling the transport and the positioning of sheets. Using a measuring unit (2) which comprises a light source (12), an optical element (14) and photoelectric elements (16), the position of a sheet (6) is monitored and controlled. For this purpose, the output signals of the photoelectric elements (16) are supplied to a control unit (20) which, on the basis of data supplied by the printer countrol unit (24), provides corresponding control signals for the sheet transport rollers (34) or the drive means (36) of the transport (38) for re-adjustment of the measuring unit (2).

REFERENCES:
patent: 4291825 (1981-09-01), Glanz

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