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PROCESS FOR MEASURING AND CONTROL LING THE INK FILM THICKNESS ON LITHOGRAPHIC INKING ROLLERS

IP.com Disclosure Number: IPCOM000023343D
Original Publication Date: 1977-Jun-30
Included in the Prior Art Database: 2004-Mar-30
Document File: 2 page(s) / 200K

Publishing Venue

Xerox Disclosure Journal

Abstract

A method is provided for measuring and controlling the ink film thickness on lithographic inking rollers under dynamic conditions by means of a non-contactinggauge head comprising a linear variable differential transformer and a pneumatic servo which maintains a constant air gap between the rollers and a nozzle follower and measures the nozzle displacement as it tracks the profile of the ro1ler- The nozzle follower is directly coupled to the linear variable differential trans-former which produces an electrical signal in response to the movement of the nozzle fol1ower- The electrical signal is amplified and is calibrated to read the nozzle displacement or it can be used as a feed back signal to an ink feed control mechanism for automatically controlling the ink layer thick-ness

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XEROX DISCLOSURE JOURNAL

PROCESS FOR MEASURING AND CONTROL~ Proposed Classification
LING THE INK FILM THICKNESS ON U~S~Cl~ 101/130
LITHOGRAPHIC INKING ROLLERS Int~ Cl. B4lf 7/00
Narayan Vaman Deshpande

A method is provided for measuring and controlling the ink
film thickness on lithographic inking rollers under dynamic
conditions by means of a non~contactinggauge head comprising
a linear variable differential transformer and a pneumatic
servo which maintains a constant air gap between the rollers
and a nozzle follower and measures the nozzle displacement as
it tracks the profile of the ro1ler~ The nozzle follower is
directly coupled to the linear variable differential trans-~
former which produces an electrical signal in response to the
movement of the nozzle fol1ower~ The electrical signal is
amplified and is calibrated to read the nozzle displacement or
it can be used as a feed back signal to an ink feed control
mechanism for automatically controlling the ink layer thick-
ness

Volume 2 Number 3 May/June 1977 19

II

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I

                 XEROX DISCLOSURE JOURNAL
20 Volume 2 Number 3 May/June 1977

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