US 9,809,021 B2
Keyless inking methods, apparatus, and systems with chamber blade system spanning anilox roll and form roll for digital offset printing
Timothy D. Stowe, Alameda, CA (US)
Assigned to Palo Alto Research Center Incorporated, Palo Alto, CA (US)
Filed by PALO ALTO RESEARCH CENTER INCORPORATED, Palto Alto, CA (US)
Filed on Dec. 3, 2015, as Appl. No. 14/958,823.
Application 14/958,823 is a division of application No. 13/251,144, filed on Sep. 30, 2011, granted, now 9,216,568.
Prior Publication US 2016/0082716 A1, Mar. 24, 2016
Int. Cl. B41F 31/02 (2006.01); B41F 31/20 (2006.01); B41M 1/06 (2006.01); B41N 3/08 (2006.01); B41C 1/10 (2006.01)
CPC B41F 31/02 (2013.01) [B41F 31/027 (2013.01); B41F 31/20 (2013.01); B41M 1/06 (2013.01); B41C 1/1008 (2013.01); B41N 3/08 (2013.01); B41P 2227/70 (2013.01); B41P 2231/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A variable lithographic keyless inking method, comprising:
metering a uniform layer of ink onto a hard form roll from a transfer roll, the transfer roll having a conformable surface, the metering including:
transferring ink from an anilox roll to the transfer roll at a first transfer nip, the first transfer nip being defined by the anilox roll and the transfer roll,
transferring ink from the transfer roll to the hard form roll at a second transfer nip, the second transfer nip being defined by the transfer roll and the hard form roll,
urging the transfer roll against the anilox roll to apply pressure to the ink at the first transfer nip, and
urging the transfer roll against the hard form roll to apply pressure to the ink at the second transfer nip;
transferring the ink of the uniform layer directly from the hard form roll to a reimageable surface layer for variable data lithographic printing;
cleaning a surface of the hard form roll, the cleaning comprising removing ink from the surface of the hard form roll; and
removing dampening fluid from the surface of the hard form roll, the dampening fluid being transferred from the reimageable surface layer to the hard form roll,
wherein the removing dampening fluid includes using an air knife to selectively evaporate dampening fluid from the surface of the hard form roll.