US 12,409,646 B2
Device for measuring elevated areas of the surface of a rotary body and system having the device
Werner Schwab, Bechtsrieth (DE)
Assigned to Heidelberger Druckmaschinen AG, Heidelberg (DE)
Filed by HEIDELBERGER DRUCKMASCHINEN AG, Heidelberg (DE)
Filed on May 11, 2020, as Appl. No. 16/871,456.
Claims priority of application No. 102019206705 (DE), filed on May 9, 2019.
Prior Publication US 2020/0353742 A1, Nov. 12, 2020
Int. Cl. B41F 33/00 (2006.01); B41F 5/24 (2006.01); B41F 13/12 (2006.01); G01B 11/24 (2006.01)
CPC B41F 33/00 (2013.01) [B41F 5/24 (2013.01); B41F 13/12 (2013.01); B41F 33/0081 (2013.01); G01B 11/2433 (2013.01); B41F 33/0027 (2013.01); B41P 2227/30 (2013.01); B41P 2233/13 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A device for measuring elevated areas of the surface of a rotary body configured as a cylinder, a roller, a sleeve or a plate for a printing press, the rotary body having a contour producing a shadow, the device comprising:
a first motor for rotating the rotary body about a rotational axis; and
a measuring unit for contactless measurement, said measuring unit including at least one radiation source and at least one area scan camera;
said measuring unit for contactless measurement including a reference object, said reference object being a taut string or a taut wire or a taut carbon fiber tensioned parallel to said rotational axis, and said reference object causing a shadow;
said at least one radiation source producing a light curtain as emitted light; and
said at least one area scan camera receiving the emitted light without the shadow produced by the contour of the rotary body.