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Electronic method of positioning a register mark sensor of a sheet printing machine

  • US 5,313,886 A
  • Filed: 06/07/1993
  • Issued: 05/24/1994
  • Est. Priority Date: 06/06/1992
  • Status: Expired due to Term
First Claim
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1. A method for positioning a register mark sensor in a sheet printing machine, wherein a register mark sensor is moved in direction perpendicular to the direction of the movement of the sheet for detecting a register mark arrangement on the sheet, wherein the register mark sensor is moved until it is positioned in a defined scanning position relative to the register mark arrangement, the method of which comprises the steps of:

  • (a) placing on the sheet a preliminary register mark, a given known distance A, perpendicular to the direction of the movement of the sheet, from a given register mark line, and(b) after printing at least one sheet, positioning the preliminary mark sensor in relation to the preliminary mark.

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