摘要:
A transfer drum for conveying a sheet in a printing press improves the accuracy of a sheet transfer. The transfer drum includes a drum body which is supported for rotation in a frame and a gripper system on the drum body for holding an edge of the sheet. The gripper system is formed of a row of spaced-apart gripper fingers jointly pivotable about an axis which is parallel to the axis of rotation of the drum body. A device for actuating the gripper fingers during a revolution of the drum body includes an actuating element which is displaceable in the direction of the axis and on which at least two drive elements of cam joints are formed. Each of the drive elements is in operative connection with a group of the gripper fingers.
摘要:
In an apparatus for clamping and releasing a gearwheel rim with respect to a main gearwheel that bears the gearwheel rim, a clamping apparatus includes an axially guided, displaceable clamping plate clamping the gearwheel rim between the plate and the main gearwheel. Antifatigue bolts are used for such a purpose. The bolts are expanded by an actuator for releasing the clamped gearwheel rim to an extent that cancels the clamping action.
摘要:
A transfer drum between printing units in a sheet-fed printing press includes gripper systems which can be switched to a desired mode of operation by simple measures and ensure stable and reliable transport of a sheet between printing units when in a respective operating position. A drum body has journals for supporting the drum body in side walls and two gripper systems provided on the drum body. The gripper systems are radially extendable into an operating position depending on a selected mode of operation for printing on only one side or for printing on both sides of the sheet. The gripper systems are disposed diametrically opposite each other relative to an axis of rotation of the drum body and are attached to a support disposed in the drum body to move in radial direction.
摘要:
A reversing gripper system of a sheet-processing machine includes respective drive motors for driving cooperating fixed grippers and spring-loaded grippers to create pivoting and opening movements. The motors may be stationary or may be disposed inside the periphery of a reversing drum. A transmission between a drive motor and the gripper system preferably includes a belt drive. A reversing drum, a printing press and a method of automated electronic adjustment of a gripper position and of gripper opening and closing times, are also provided.
摘要:
The present invention relates to a membrane electrode unit comprising a polymer membrane doped with a mineral acid as well as two electrodes, characterized in that the polymer membrane comprises at least one polymer with at least one nitrogen atom and at least one electrode comprises a catalyst which is formed from at least one precious metal and at least one metal less precious according to the electrochemical series.
摘要:
The present invention relates to a method for the preparation of polyester resins containing nanoscale additives which are nanodispersed as a binding agent for powder paints, wherein the nanoscale additives are introduced in an outer liquid phase into the reaction mixture over the course of the resin synthesis. The invention relates to a method for the preparation of a powder paint formulation based on polyester resins as a binding agent component as well as, optionally, on pigments, fillers and additives which are conventionally used for powder paints, wherein polyester resins are used which contain nanodispersed nanoscale additives. The invention also comprises a powder paint formulation based on polyester resins as a binding agent component as well as, optionally, on pigments, fillers and additives which are conventionally used for powder paints, wherein the powder paint formulation contains nanoscale additives which are contained in the binding agent matrix in a nanodispersed manner.
摘要:
The present invention relates to a process for preparing a lactone. The process comprises the steps of reacting an aldehyde with an organic halide in a carbon chain extension reaction to form an alcohol compound comprising a functional group capable of allowing for carbonylation of said alcohol compound, and then reacting said alcohol compound in a carbonylation reaction to form an hydroxycarboxylic acid; and cyclising the hydroxycarboxylic acid to produce the lactone.
摘要:
The invention relates to a membrane-electrode unit comprising two gas diffusion layers, each layer being in contact with a catalyst layer and said gas diffusion layers being separated by a polymer electrolyte membrane. A polymer frame is provided on at least one of the two surfaces of the polymer electrolyte membrane that are in contact with the catalyst layer. Said polymer frame comprises an inner region that lies on at least one surface of the polymer electrolyte membrane and an outer region that lies outside the gas diffusion layer. The thickness of all components of the outer region is between 50 and 100% of the thickness of all components of the inner region. The thickness of the outer region is reduced by a maximum 2% at a temperature of 80° C. and a pressure of 10 N/mm2 over a period of 5 hours, said reduction in thickness being determined after a first compression process, which is carried out at a pressure of 10 N/mm2 for 1 minute.
摘要翻译:本发明涉及一种膜 - 电极单元,其包括两个气体扩散层,每个层与催化剂层接触,并且所述气体扩散层被聚合物电解质膜隔开。 聚合物框架设置在与催化剂层接触的聚合物电解质膜的两个表面中的至少一个上。 所述聚合物框架包括位于聚合物电解质膜的至少一个表面上的内部区域和位于气体扩散层外部的外部区域。 外部区域的所有部件的厚度在内部区域的所有部件的厚度的50%至100%之间。 外部区域的厚度在5小时内在80℃的温度和10N / mm 2的压力下降低最大2%,所述厚度的减小被确定 在第一压缩过程之后,在10N / mm 2的压力下进行1分钟。
摘要:
The lifetime of optical components used in deep-UV (DUV) excimer laser systems, including systems in a MOPA configuration, can be increased by reducing the intensity of pulses incident upon these components. In one approach, an output pulse can be “stretched” in order to reduce the peak power of the pulse. A pulse stretching component can be used, which can be mounted outside the laser enclosure with a horizontal beam path in order to provide a delay line with a minimum impact on the laser system footprint. The horizontal beam path also can minimize the number of optical components in the arm containing the high power beam. A beamsplitting prism can be used with the delay line to avoid the rapid degradation of coatings otherwise exposed to intense UV beams. The prism can expand the beam in the delay line in order to minimize beam intensity and losses due to reflection.
摘要:
The lifetime of optical components used in deep-UV (DUV) excimer laser systems, including systems in a MOPA configuration, can be increased by reducing the intensity of pulses incident upon these components. In one approach, an output pulse can be “stretched” in order to reduce the peak power of the pulse. A pulse stretching component can be used, which can be mounted outside the laser enclosure with a horizontal beam path in order to provide a delay line with a minimum impact on the laser system footprint. The horizontal beam path also can minimize the number of optical components in the arm containing the high power beam. A beamsplitting prism can be used with the delay line to avoid the rapid degradation of coatings otherwise exposed to intense UV beams. The prism can expand the beam in the delay line in order to minimize beam intensity and losses due to reflection.