# US 10,870,550 B2 · Printing apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,870,550 B2 - Document ID: US10870550B2 - Status: Granted - Kind: B2 - Application number: 16/259,191 - Filed: 2019-01-28 - Published: 2019-08-08 - Granted: 2020-12-22 - Earliest claimed: 2018-02-08 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Shuichi Tokuda; Seiji Ogasawara; Takaaki Ishida; Masakazu Tsukuda; Masaaki Matsuura; Kazuki Matsuo; Tomofumi Nishida; Yuna Hattori - Web page: https://patentgrep.com/patent/US10870550B2 ## CPC - B65H 7/12: responsive to double feed or separation - B41J 2/16508: {connected with the printer frame} - B41J 2/16588: {Print heads movable towards the cleaning unit} - B41J 3/60: for printing on both faces of the printing material - B41J 11/006: {Means for preventing paper jams or for facilitating their removal} - B41J 11/0095: {Detecting means for copy material, e.g. for detecting or sensing presence of copy material or its leading or trailing end} - B41J 13/0009: {control of the transport of the copy material} - B65H 5/06: by rollers {or balls, e.g. between rollers (transport by suction rollers B65H5/226)} - B65H 5/062: {between rollers or balls} - B65H 5/26: Duplicate, alternate, selective, or coacting feeds - B65H 5/38: immovable in operation - B65H 7/06: responsive to presence of faulty articles or incorrect separation or feed (B65H7/14 takes precedence) - B65H 85/00: Recirculating articles, i.e. feeding each article to, and delivering it from, the same machine work-station more than once - B65H 2402/441: movable for facilitating access to area inside the housing, e.g. pivoting or sliding - B65H 2402/45: Doors - B65H 2404/144: with relative movement of the rollers to / from each other - B65H 2404/6111: and shaped for curvilinear transport path - B65H 2511/22: Distance - B65H 2511/414: of mode of operation - B65H 2511/524: Multiple articles, e.g. double feed - B65H 2511/528: Jam - B65H 2553/51: Encoders, e.g. linear - B65H 2601/2525: Collisions - B65H 2701/1311: leading edge - B65H 2701/1313: trailing edge - B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS ## Abstract In a printing apparatus, the ends of print media fed continuously can be prevented from colliding with each other. The printing apparatus includes a printing unit configured to perform a print operation, a detecting unit configured to detect a conveyance abnormality, a conveying unit configured to convey a preceding print medium and a succeeding print medium, a conveying path having a first area including a curved portion at which a conveying direction of the print medium is curved and a second area upstream of the first area, and an opening unit capable of opening the first area of the conveying path. In a case in which a leading edge of the succeeding print medium is located in the second area at the time of the detecting unit detecting conveyance abnormality of the preceding print medium, the conveying unit conveys the succeeding print medium so that the leading edge of the succeeding print medium reaches the first area. ## Claims ### Claim 1 A printing apparatus comprising: a printing unit configured to perform a print operation for a print medium; a detecting unit configured to detect a conveyance abnormality of a print medium; a conveying unit configured to convey a preceding print medium and a succeeding print medium; a conveying path having a curved portion in a conveying direction of the print medium and an upstream area upstream of the curved portion with respect to the conveying direction; and an opening unit capable of opening the curved portion of the conveying path, wherein, in a case in which a leading edge of the succeeding print medium is located in the upstream area at the time of the detecting unit detecting a conveyance abnormality of the preceding print medium, the conveying unit conveys the succeeding print medium so that the leading edge of the succeeding print medium reaches the curved portion. ### Claim 2 (depends on 1) The printing apparatus according to claim 1, wherein the conveying unit has a first conveying roller pair and a second conveying roller pair provided downstream of the first conveying roller pair in the conveying direction, wherein inclination of nip tangents of the first conveying roller pair and the second conveying roller pair are different from each other, and the curved portion is provided between the first conveying roller pair and the second conveying roller pair. ### Claim 3 (depends on 2) The printing apparatus according to claim 2, further comprising: a second detecting unit provided upstream of the second conveying roller pair with respect to the conveying direction and configured to detect a leading edge and a trailing edge of a print medium, wherein based on detection results of the second detecting unit, an amount by which the succeeding print medium is conveyed up to the curved portion is determined. ### Claim 4 (depends on 3) The printing apparatus according to claim 3, further comprising: a calculating unit configured to calculate a drive amount by which the conveying unit is driven in a case in which the leading edge of the succeeding print medium is detected by the second detecting unit. ### Claim 5 (depends on 2) The printing apparatus according to claim 2, wherein the first conveying roller pair and the second conveying roller pair are provided upstream of the printing unit with respect to the conveying direction in a case of performing the print operation. ### Claim 6 (depends on 1) The printing apparatus according to claim 1, wherein in a case in which the leading edge of the succeeding print medium is located in the upstream area at the time of the detecting unit detecting the conveyance abnormality of the preceding print medium, the conveying unit conveys the succeeding print medium so that the leading edge of the succeeding print medium reaches the curved portion irrespective of the position of the preceding print medium. ### Claim 7 (depends on 1) The printing apparatus according to claim 1, wherein the opening unit is a guide member provided so as to be turnable relative to the printing apparatus and forming part of the conveying path. ### Claim 8 (depends on 1) The printing apparatus according to claim 1, wherein the printing unit is a print head that ejects ink. ### Claim 9 (depends on 8) The printing apparatus according to claim 8, wherein the print head is of a full line type in which ejection openings that eject ink are arrayed so as to correspond to a width of a print medium conveyed by the conveying unit. ### Claim 10 (depends on 9) The printing apparatus according to claim 9, further comprising: a cap that caps an ejection opening surface provided with the ejection openings, wherein the print head is movable between a printing position for the print operation and a cap position at which the print head is capped by the cap. ### Claim 11 (depends on 10) The printing apparatus according to claim 10, wherein the print head rotates between the printing position and the cap position. ### Claim 12 (depends on 1) The printing apparatus according to claim 1, wherein in the curved portion, the print medium is conveyed while being curved. ### Claim 13 (depends on 1) The printing apparatus according to claim 1, wherein in a case in which the conveyance abnormality is detected, the curved portion is opened and exposed by the opening unit. ### Claim 14 A method of controlling a printing apparatus that comprises a printing unit configured to perform a print operation for a print medium, a detecting unit configured to detect a conveyance abnormality of a print medium, a conveying unit configured to convey a preceding print medium and a succeeding print medium, a conveying path having a curved portion in a conveying direction of the print medium and an upstream area upstream of the curved portion with respect to the conveying direction, and an opening unit capable of opening the curved portion of the conveying path, the method comprising: in a case in which a leading edge of the succeeding print medium is located in the upstream area at the time of the detecting unit detecting a conveyance abnormality of the preceding print medium, conveying the succeeding print medium by the conveying unit so that the leading edge of the succeeding print medium reaches the curved portion.