# US 11,993,078 B2 · Recording device and recording method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,993,078 B2 - Document ID: US11993078B2 - Status: Granted - Kind: B2 - Application number: 17/815,583 - Filed: 2022-07-28 - Published: 2023-02-02 - Granted: 2024-05-28 - Earliest claimed: 2021-07-30 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Shun Sakaihara; Yuya Nakamura - Web page: https://patentgrep.com/patent/US11993078B2 ## CPC - B41J 2/04508: {aiming at correcting other parameters} - B41J 29/38: Drives, motors, controls or automatic cut-off devices for the entire printing mechanism - B41J 2/04586: {controlling heads of a type not covered by groups B41J2/04575 - B41J2/04585, or of an undefined type} - B41J 29/393: Devices for controlling or analysing the entire machine {; Controlling or analysing mechanical parameters involving printing of test patterns} - B41J 2/2117: {Ejecting white liquids} - B41J 2029/3935: {by means of printed test patterns} - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS ## Abstract A recording device including: a liquid ejecting unit configured to eject liquid to a first surface of a medium transported in a transport direction, a roller disposed downstream of the liquid ejecting unit in the transport direction and configured to rotate in contact with the first surface, and a control unit, wherein the control unit is configured to form a first pattern of the liquid on the first surface by controlling ejection of the liquid by the liquid ejecting unit, and to form a detection region for the first pattern at a specific position on the first surface at which the roller is brought into contact with the first surface when a rotational angle of the roller becomes m °+360°, m ° being a rotational angle of the roller when the roller is brought into contact with the first pattern. ## Claims ### Claim 1 A recording device comprising: a liquid ejecting unit configured to eject liquid to a first surface of a medium transported in a transport direction; a roller disposed downstream of the liquid ejecting unit in the transport direction and configured to rotate in contact with the first surface; and a control unit, wherein the control unit is configured to form a first pattern of the liquid on the first surface by controlling ejection of the liquid by the liquid ejecting unit, and to form a detection region for the first pattern at a specific position on the first surface with which the roller is brought into contact when a rotational angle of the roller becomes m °+360°, m ° being a rotational angle of the roller when the roller is brought into contact with the first pattern. ### Claim 2 (depends on 1) The recording device according to claim 1, wherein the control unit is configured to cause the liquid ejecting unit to record an indication of a concentration of the first pattern in a region of the first surface avoiding the first pattern in a width direction intersecting with the transport direction. ### Claim 3 (depends on 1) The recording device according to claim 1, wherein the control unit is configured to form, side by side, a plurality of the first patterns that differ from each other in concentration in the width direction intersecting with the transport direction. ### Claim 4 (depends on 1) The recording device according to claim 1, wherein the detection region is a non-recording region in which the liquid is not ejected from the liquid ejecting unit. ### Claim 5 (depends on 1) The recording device according to claim 1, wherein a second pattern having a color corresponding to a color complementary to a color of the first pattern is formed in the detection region by the liquid ejecting unit. ### Claim 6 (depends on 1) The recording device according to claim 1, wherein the control unit is configured to form a plurality of first patterns side by side in the transport direction in a region having a length corresponding to a circumference of the roller in the transport direction of the medium, the plurality of first patterns each having a length, in the transport direction, corresponding to a value obtained by diving the circumference by a positive integer n, and the plurality of first patterns being different from each other in concentration, and to form the detection region having a length in the transport direction corresponding to a length of the first pattern at each of a plurality of the specific positions respectively corresponding to the plurality of first patterns. ### Claim 7 (depends on 6) The recording device according to claim 6, wherein the integer n is an odd number. ### Claim 8 (depends on 6) The recording device according to claim 6, wherein the control unit is configured to form the plurality of the first patterns such that the concentration of the first patterns increases in a stepwise manner from downstream to upstream in the transport direction. ### Claim 9 (depends on 6) The recording device according to claim 6, wherein the control unit is configured to include, among the plurality of the first patterns, a first pattern having a concentration at a preset maximum value. ### Claim 10 (depends on 6) The recording device according to claim 6, wherein the control unit is configured to form a third pattern in a region between the detection region located most upstream in the transport direction of the first surface and the detection region located second most upstream succeeding to the detection region located most upstream by controlling ejection of the liquid by the liquid ejecting unit. ### Claim 11 A recording method performed by a recording device that includes a liquid ejecting unit configured to eject liquid to a first surface of a medium transported in a transport direction, and a roller disposed downstream of the liquid ejecting unit in the transport direction and configured to rotate in contact with the first surface, the recording method comprising a pattern forming step in which a first pattern of the liquid is formed on the first surface by the liquid ejecting unit, and a detection region for the first pattern is formed at a specific position on the first surface with which the roller is brought into contact when a rotational angle of the roller becomes m °+360°, m ° being a rotational angle of the roller when the roller is brought into contact with the first pattern.