US 11,738,579 B2
Device for introducing a pattern by radiation on a wound endless structure
Peter Vogt, Apolda (DE); Toni Strobel, Jena (DE); René Pagel, Jena (DE); Uwe Klowsky, Jena (DE); Steffen Ruecker, Grossloebichau (DE); Christian Koenig, Tambach-Dietharz (DE); and Marcus Witter, Weimar (DE)
Assigned to Laser Imaging Systems GmbH, Jena (DE)
Appl. No. 17/769,496
Filed by Laser Imaging Systems GmbH, Jena (DE)
PCT Filed Oct. 12, 2020, PCT No. PCT/DE2020/100880
§ 371(c)(1), (2) Date Apr. 15, 2022,
PCT Pub. No. WO2021/073687, PCT Pub. Date Apr. 22, 2021.
Claims priority of application No. 10 2019 128 198.9 (DE), filed on Oct. 18, 2019.
Prior Publication US 2023/0136467 A1, May 4, 2023
Int. Cl. B41J 15/16 (2006.01); B65H 20/24 (2006.01); B65H 20/00 (2006.01)
CPC B41J 15/16 (2013.01) [B65H 20/005 (2013.01); B65H 20/24 (2013.01); B65H 2553/21 (2013.01); B65H 2553/40 (2013.01); B65H 2555/10 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A device for introducing patterns by irradiation of a wound continuous substrate in which the continuous substrate is rollably guided from an unwinder roll to a winder roll via a processing drum,
wherein a registration unit for optically recording target marks and a radiation source for irradiating a radiation pattern are directed in two different directions to the processing drum, and a control unit is provided for controlling the alignment between radiation pattern and continuous substrate and for spatial differentiation of the radiation pattern,
wherein components for electronically adapting the radiation pattern to positional deviations of the continuous substrate determined by the registration unit based on the target marks are provided in the control unit,
wherein a dancer roll for taut guidance of the continuous substrate along a defined contact region of at least one half of a circumference of the processing drum is provided between the processing drum and unwinder roll and between the processing drum and winder roll, respectively, in order to transmit a conveying movement without slippage from the processing drum via the defined contact region to the continuous substrate by a drive of the processing drum,
wherein the dancer rolls are adapted to tautly guide an advancing substrate web of the continuous substrate and a returning substrate web of the continuous substrate with a constant force acting in counter-pull to the contact region at the processing drum,
wherein stabilization devices are provided for adjusting an equilibrium between a defined counterforce and the constant force acting on the dancer roll and are linked to a measuring unit for recording changes in a deflection of the respective dancer roll, and
wherein the unwinder roll and the winder roll have adjustable drives which are controlled with respect to the rotational speed thereof based on perturbations of the force equilibrium at the dancer roll (43) which are acquired by the measuring unit.