Chain tensioner, machine for processing elements in the form of sheets and method for tensioning the chain sets

    公开(公告)号:US10753434B2

    公开(公告)日:2020-08-25

    申请号:US16080695

    申请日:2017-03-09

    Applicant: BOBST MEX SA

    Abstract: A chain tensioner (50; 500) for a conveying device (70) of a machine (1; 1′) for processing elements in the form of sheets (10), the conveying device (70) includes two lateral chain sets connected to the ends of transverse gripper bars (75) able to grasp the elements (10) and at least one chain-guiding device (90) configured to guide a respective chain set (80); the chain tensioner (50; 500) includes: an actuator (9) controlled by a control unit (8), a movable support (11), a transmission element (12) borne by the movable support (11), a rotary element (13) rotated by the actuator (9) and cooperating with the transmission element (12) in order to exert a thrust force on the movable support (11), the rotary element (13) being rotatable, to adjust the tension of the chain set (80). The actuator (9) is controlled in synchronism with the machine angle (MA). A machine (1; 1′) for processing elements and a method for tensioning the chain sets (80) of the conveying device (70) are disclosed.

    A REGISTER, A PROCESSING MACHINE AND A METHOD FOR PLACING PLATE-LIKE ELEMENTS

    公开(公告)号:US20190144224A1

    公开(公告)日:2019-05-16

    申请号:US16098583

    申请日:2017-05-10

    Applicant: BOBST MEX SA

    Inventor: Marco CARDILLO

    Abstract: A register (20; 60) for a processing machine (1) for processing plate-like elements (10) includes a gripping element (21; 22) for placing the plate-like elements (10) in a gripper bar (31) of a conveyor (30) of a processing machine (1) conveying the plate-like elements (10) in a longitudinal direction, an actuator module (201, 202) to drive the gripping element (21; 22), at least one front correction sensor module (7) configured to measure the front position of register marks (12a) printed on a front section of the plate-like element (10) grasped by the gripping element (21; 22). The register (20; 60) includes at least one front pre-correction sensor module (80), placed upstream of the front correction sensor module (7) in the longitudinal direction, the front pre-correction sensor module (80) is configured: to detect the passage of a front transversel edge of the plate-like element (10) in at least two longitudinally spaced lateral axis of detection (P1, P2), one located in front of the other, and to provide measurements to a computation and control unit (40) of the processing machine (1) that is configured: to control the actuator module (201, 202) in order to move the gripping element (21; 22) toward the gripper bar (31) and to activate the gripping element (21; 22) in order to grasp a plate-like element (10). Also a processing machine for processing plate-like elements includes the register. A method for placing plate-like elements within a processing machine is disclosed.

    CHAIN TENSIONER, MACHINE FOR PROCESSING ELEMENTS IN THE FORM OF SHEETS AND METHOD FOR TENSIONING THE CHAIN SETS

    公开(公告)号:US20190063563A1

    公开(公告)日:2019-02-28

    申请号:US16080695

    申请日:2017-03-09

    Applicant: BOBST MEX SA

    Abstract: A chain tensioner (50; 500) for a conveying device (70) of a machine (1; 1′) for processing elements in the form of sheets (10), the conveying device (70) includes two lateral chain sets connected to the ends of transverse gripper bars (75) able to grasp the elements (10) and at least one chain-guiding device (90) configured to guide a respective chain set (80); the chain tensioner (50; 500) includes: an actuator (9) controlled by a control unit (8), a movable support (11), a transmission element (12) borne by the movable support (11), a rotary element (13) rotated by the actuator (9) and cooperating with the transmission element (12) in order to exert a thrust force on the movable support (11), the rotary element (13) being rotatable, to adjust the tension of the chain set (80). The actuator (9) is controlled in synchronism with the machine angle (MA). A machine (1; 1′) for processing elements and a method for tensioning the chain sets (80) of the conveying device (70) are disclosed.

    Device for holding a flat sheet-shaped element circulating in a processing machine

    公开(公告)号:US10093507B2

    公开(公告)日:2018-10-09

    申请号:US14439504

    申请日:2013-10-07

    Applicant: BOBST MEX SA

    Abstract: A holding device (1) for a succession of sheet-shaped elements circulating in a processing machine (100) along conveying path T. The holding device (1) has two series (10, 20) of a plurality of suction members (11, 21). At least one series of suction members 20 extends along and is movably mounted parallel to the transport path T of the sheets, between a retracted position and a deployed position. Each series is in an array, parallel to the transport path and the suction members are arranged spaced apart alongside one another, so that the array of members extend perpendicular to the conveying path T of the sheets and the suction members (11, 21) of each series (10, 20) are transversely offset relative to the suction members (11, 21) of the other series (10, 20).

    WEB SUPPORT AND STABILIZATION UNIT FOR A PRINTING HEAD, AND PRINTING STATION EQUIPPED THEREWITH

    公开(公告)号:US20180022120A1

    公开(公告)日:2018-01-25

    申请号:US15550555

    申请日:2016-02-05

    Applicant: BOBST MEX SA

    CPC classification number: B41J15/16 B41J11/0085 B41J15/04 B41J15/048

    Abstract: A support and stabilization unit (200, 300, 400, 500) for a web (20) advancing in its longitudinal direction over the unit from upstream to downstream; the unit includes in series at least one rotating support roller (31, 32) that is able to come into contact with an underside of the web (20), and at least one device (121, 122, 122′) for tensioning the web (20). The tensioning device (121, 122, 122′) includes a guiding face (121a, 122a) oriented toward the underside of the web (20), an internal cavity connected to the outside of the device via an outlet opening (121d) which is oriented toward the guiding face (121a, 122a), and an air inlet inside the internal cavity (121b), so as to produce, on the web (20), a force (F2) oriented toward the guiding face (121a, 122a).

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