Stretching machine for stretching thermoplastic films

    公开(公告)号:US10857723B2

    公开(公告)日:2020-12-08

    申请号:US15911284

    申请日:2018-03-05

    摘要: The machine (1) includes at least one assistance subassembly (10) having: an endless chain or belt (16); a plurality of thrust members (20) connected to the chain or belt (16) in succession and projecting from the chain or belt (16), and a drive device (21) of this chain or belt (16), several thrust members (20) are brought into the path (3) of the sliders (8) connected to the grippers (4) for gripping the film (F), so that at least one of the thrust members (20) comes to bear against at least one of these sliders (8) and exerts a thrust on this slider to assist the displacement of this slider along the rail (5e) on which this slider moves.

    Airflow control apparatus and method for manufacturing stretched film

    公开(公告)号:US10792844B2

    公开(公告)日:2020-10-06

    申请号:US15773243

    申请日:2016-12-14

    摘要: An airflow control apparatus for a tenter oven including an entrance into which a film is conveyed and an exit from which the film is taken out, the airflow control apparatus having a box-shaped body installed adjacent to at least one or both of an upstream side in a film running direction of the entrance and a downstream side in the film running direction of the exit, includes: at least one pair of air blowing nozzles configured to blow air toward the film; at least one pair of upstream-side exhaust mechanisms configured to discharge air in the box-shaped body, and located on the upstream side of the air blowing nozzles in the film running direction; and at least one pair of downstream-side exhaust mechanisms configured to discharge the air in the box-shaped body, and located on the downstream side of the air blowing nozzles in the film running direction.

    SUPPORT RAIL FOR A SPIRAL CONVEYOR
    7.
    发明申请

    公开(公告)号:US20200283031A1

    公开(公告)日:2020-09-10

    申请号:US16293258

    申请日:2019-03-05

    摘要: A longitudinally curved support rail (56) for supporting and moving a drive chain assembly (52) at the base of a spiral conveyor belt (34) to drive the bottom tier (30) of the spiral conveyor belt while being supported by the support rail. The support rail including an upright web section (80) and a support flange (78) cantilevered outwardly from the web section to provide a platform or shelf to support a chain drive assembly (52), thereon during travel of the chain drive assembly along the support rail.

    Gripper with toggle lever arrangement

    公开(公告)号:US09944013B2

    公开(公告)日:2018-04-17

    申请号:US15500401

    申请日:2015-07-16

    发明人: Helmut Gumpinger

    IPC分类号: B29C55/20 B29K105/00

    CPC分类号: B29C55/20 B29K2105/256

    摘要: An improved gripper with a toggle lever arrangement is characterized by, among others, the following features —the gripper comprises a gripper lever which is pivotable with respect to a gripper holder around a gripper axis, —the gripper lever is configured as a toggle lever and comprises in addition a first and a second toggle lever leg which are pivotable relative to each other around a toggle lever axis, —in addition a force application unit is provided which acts on the second toggle lever leg pivotable around the toggle lever axis and/or on the toggle lever flap, —the force application unit is thereby configured such that during pivoting of the gripper lever from the release position into the closed- and clamping position thereof, the toggle lever flap initially touches down on the side of the gripper table lying away from the material web while prefixing the material web in this region, before the toggle lever flap reaches the final closed- and clamping position thereof during the remaining pivoting process, in which position it is force-actuated in the direction of the gripper table and holds the material web edge clamped between the gripper surfaces.