# US 2016/0355031 A1 · Method and device for pre-treatment of a recording medium for an electrophoretic toner transfer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0355031 A1 - Document ID: US20160355031A1 - Status: Published application - Kind: A1 - Application number: 15/172,610 - Filed: 2016-06-03 - Published: 2016-12-08 - Earliest claimed: 2015-06-03 - Assignees: Oce Printing Systems GmbH - Applicants: Oce Printing Systems GmbH & Co. KG - Inventors: Sabine Gerlach; Thomas Montag; Wolfgang Hettler - Web page: https://patentgrep.com/patent/US20160355031A1 ## CPC - B41J 11/0015: {for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing (selective coating B41J2/2114)} - B01D 59/42: by electromigration; by electrophoresis - G03G 15/10: using a liquid developer - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract A printing system can include an energizer, a condition group, a print group, a sensor, and a controller. The energizer can be configured to treat a surface of a recording medium to increase an energy of the surface. The conditioning group can be configured to provide a coating substance on the surface having been treated by the energizer to provide a pre-treated recording medium having a coated surface. The print group can be configured to print a toner-based print image onto the coated surface of the pre-treated recording medium using electrophoresis. The sensor can be configured to detect resistance data indicative of a resistance of the pre-treated recording medium orthogonal to the coated surface of the pre-treated recording medium. The controller can be configured to control the energizer to adapt a dimension of the increase of the energy of the surface of the recording medium based the resistance data. ## Claims ### Claim 1 A printing system, comprising: an energizer configured to treat a surface of a recording medium to increase an energy of the surface of the recording medium; a conditioning group configured to provide a coating substance on the surface of the recording medium having been treated by the energizer to provide a pre-treated recording medium having a coated surface; a print group configured to print a toner-based print image onto the coated surface of the pre-treated recording medium using electrophoresis; a sensor configured to detect resistance data indicative of a resistance of the pre-treated recording medium orthogonal to the coated surface of the pre-treated recording medium; and a controller configured to control the energizer to adapt a dimension of the increase of the energy of the surface of the recording medium based the resistance data. ### Claim 2 (depends on 1) The printing system according to claim 1, wherein the energizer is configured to: charge the surface of the recording medium with at least one of a corona and a plasma; and adapt a dose of the at least one of the corona and the plasma to adapt the dimension of the increase of the energy of the surface of the recording medium. ### Claim 3 (depends on 1) The printing system according to claim 1, wherein: the print group includes: a transfer roller configured to transfer the toner-based print image onto the coated surface of the pre-treated recording medium, and a counter-pressure roller; the toner-based print image is transferred using an electrical field generated between the transfer roller and the counter-pressure roller; the sensor is configured to determine a magnitude of a current through the pre-treated recording medium that is produced via the electrical field; and the resistance data includes the magnitude of the current. ### Claim 4 (depends on 1) The printing system according to claim 1, wherein at least one of: the coating substance includes: an active substance configured to increase an adhesion of the toner-based print image on the recording medium, and an active substance carrier fluid configured to distribute the active substance on the surface of the recording medium; the active substance includes particles with a diameter that is greater than a diameter of pores of the surface of the recording medium; and the active substance carrier fluid has a conductivity that is greater than a conductivity of water. ### Claim 5 (depends on 1) The printing system according to claim 1, wherein the controller is configured to: determine a model of a controlled section of the printing system, the controlled section including the energizer, the conditioning group, and the recording medium; determine a value of a control error based on the resistance data; and determine the dimension of the increase of the energy of the surface of the recording medium based on the model of the controlled section and the control error. ### Claim 6 (depends on 5) The printing system according to claim 5, wherein the control error is determined based on a first resistance data of resistance data and a second resistance data of the resistance data, wherein the first resistance data and the second resistance data being detected at different points in time. ### Claim 7 (depends on 1) The printing system according to claim 1, wherein the controller is configured to determine the dimension of the increase of the energy of the surface of the recording medium such that the resistance of the pre-treated recording medium is reduced. ### Claim 8 (depends on 1) The printing system according to claim 1, wherein: the recording medium includes an outer first layer and a second layer underlying the outer first layer, the outer first layer and the second layer being parallel to the surface; in the dry state, the first layer has a higher resistance than the second layer; and the first layer and the second layer are configured to absorb a water-based active substance carrier fluid of the coating substance. ### Claim 9 A method for pre-treating a recording medium with a coating substance, the method comprising: increasing an energy of a surface of the recording medium to provide a treated surface of the recording medium; applying the coating substance onto the treated surface of the recording medium to provide a pre-treated recording medium with a coated surface, the pre-treated recording medium with the coated surface being operable to have a toner-based print image printed thereon using electrophoresis; detecting resistance data indicative of a resistance of the pre-treated recording medium orthogonal to the coated surface of the pre-treated recording medium; and adapting a dimension of the increase of the energy of the surface of the recording medium based on the resistance data. ### Claim 10 (depends on 9) A non-transitory computer-readable storage medium with an executable program stored thereon, wherein the program instructs a processor to perform the method of claim 9. ### Claim 11 A printing system, comprising: an energizer configured to charge a surface of a recording medium; a conditioning group configured to apply a coating substance on the surface of the recording medium having been energized by the energizer to provide a pre-treated recording medium having a coated surface; a print group configured to print a print image onto the coated surface of the pre-treated recording medium; a sensor configured to determine a resistance of the pre-treated recording medium; and a controller configured to control the energizer, based on the resistance detected by the sensor, to adjust a charge value at which the energizer charges the surface of the recording medium. ### Claim 12 (depends on 11) The printing system according to claim 11, wherein the sensor is configured to measure a current through the pre-treated recording medium to determine the resistance. ### Claim 13 (depends on 12) The printing system according to claim 12, wherein: the print group includes: a transfer roller configured to transfer a print image onto the coated surface of the pre-treated recording medium, and a counter-pressure roller positioned on an opposite side of the pre-treated recording medium; and the current flows between the transfer roller and the counter-pressure roller. ### Claim 14 (depends on 12) The printing system according to claim 12, wherein: the printing system further includes a first roller positioned adjacent to the surface of the pre-treated recording medium and a second roller positioned on an opposite side of the pre-treated recording medium; and the current flows between the first and the second rollers. ### Claim 15 (depends on 13) The printing system according to claim 13, wherein the first and the second rollers are positioned upstream of the print group in a print direction of the recording medium.