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公开(公告)号：US4503658A
公开(公告)日：1985-03-12
申请号：US479360
申请日：1983-03-28
CPC分类号： B29C55/06 , B65B11/045
摘要： A stretch wrapping system including apparatus and process is disclosed in which rotation of a noncylindrical or off-centered load draws film web at a continually fluctuating speed from a film roll through a prestretching device to wrap the load. The prestretching device includes an upstream roller coupled to a braking device and a downstream roller coupled to a positive torque device. The speed of the downstream roller is proportional to the take-up speed of the web on the load and the feedback device continually senses the speed of both rollers and adjusts the braking device so that the speed ratio of the rollers produces a constant stretch of the film web above its yield point. The feedback device also continually senses the forces contributed by the braking device and the torque device and continually adjusts the torque device so that the force on the web between the downstream roller and the load is held constant at a level below the yield point of the web. The feedback device may be connected to display systems to display the amount of web stretch, the web force to the load, and the amount of film web consumed in a wrapping operation.
摘要翻译： 公开了一种包括装置和方法的拉伸包裹系统，其中非圆柱形或偏心载荷的旋转以连续波动的速度从胶片卷通过预拉伸装置牵引薄膜卷以包裹载荷。 预拉伸装置包括联接到制动装置的上游辊和联接到正扭矩装置的下游辊。 下游辊的速度与卷材在负载上的卷取速度成比例，并且反馈装置连续地感测两个辊的速度并调节制动装置，使得辊的速比产生恒定的拉伸 电影网络超过其屈服点。 反馈装置还连续地感测由制动装置和扭矩装置贡献的力并连续地调节扭矩装置，使得下游辊和负载之间的幅材上的力保持恒定在低于幅材的屈服点的水平 。 反馈装置可以连接到显示系统以显示幅材拉伸的量，对负载的纤维网力量以及在卷绕操作中消耗的胶卷的量。
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2.发明授权Pulse shaping filter for received digital transmissions using phase lock loop for adjusting shift register 失效用于调整移位寄存器的锁相环的接收数字传输的脉冲整形滤波器
公开(公告)号：US5657353A
公开(公告)日：1997-08-12
申请号：US999087
申请日：1992-12-31
CPC分类号： H04L25/0314
摘要： A pulse shaping filter for shaping pulses received at a specified data rate is disclosed. The filter has a desired impulse response associated with a plurality of sampled values. The filter includes a sampling circuit responsive to the input pulses, such that each pulse is sampled at a desired sampling rate. A delay circuit provides a plurality of delayed versions of the sampled pulse, wherein said sampled pulse propogate through said delay circuit at a unit delay time substantially equal to the period of the desired sampling rate. A plurality of resistors are coupled to the delay circuit, each resistor providing a weighing coefficient by which the delayed versions of the sampled pulses are multiplied to provide a plurality of weighed delayed pulses. A summing circuit is adapted to add all said weighed delayed pulses to provide shaped pulses. The resistors are selected such that each sum of said weighed delayed pulses as the pulses are propogated through the delay circuit is substantially equal to a corresponding sampled value of said impulse response.
摘要翻译： 公开了一种用于对以指定数据速率接收的脉冲进行整形的脉冲整形滤波器。 滤波器具有与多个采样值相关联的所需脉冲响应。 滤波器包括响应于输入脉冲的采样电路，使得每个脉冲以期望的采样速率被采样。 延迟电路提供采样脉冲的多个延迟版本，其中所述采样脉冲以基本上等于期望采样速率的周期的单位延迟时间传播通过所述延迟电路。 多个电阻器耦合到延迟电路，每个电阻器提供称重系数，通过该系数乘以采样脉冲的延迟版本以提供多个加权的延迟脉冲。 加法电路适于添加所有称重延迟脉冲以提供成形脉冲。 电阻器被选择为使得作为脉冲的所述称重延迟脉冲的每个和通过延迟电路传播，基本上等于所述脉冲响应的对应采样值。
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公开(公告)号：US4514955A
公开(公告)日：1985-05-07
申请号：US250926
申请日：1981-04-06
CPC分类号： B65B11/045
摘要： A stretch wrapping system including apparatus and process is disclosed in which rotation of a non-cylindrical or off-centered load draws film web at a continually fluctuating speed from a film roll through a prestretching device to wrap the load. The prestretching device includes an upstream roller coupled to a braking device and a downstream roller coupled to a positive torque device. The speed of the downstream roller is proportional to the take-up speed of the web on the load and the feedback device continually senses the speed of both rollers and adjusts the braking device so that the speed ratio of the rollers produces a constant stretch of the film web above its yield point. The feedback device also continually senses the forces contributed by the braking device and the torque device and continually adjusts the torque device so that the force on the web between the downstream roller and the load is held constant at a level below the yield point of the web. The feedback device may be connected to display systems to display the amount of web stretch, the web force to the load, and the amount of film web consumed in a wrapping operation.
摘要翻译： 公开了一种包括装置和方法的拉伸包裹系统，其中非圆柱形或偏心载荷的旋转以连续波动速度从薄膜卷通过预拉伸装置牵引薄膜卷以包裹负载。 预拉伸装置包括联接到制动装置的上游辊和联接到正扭矩装置的下游辊。 下游辊的速度与卷材在负载上的卷取速度成比例，并且反馈装置连续地感测两个辊的速度并调节制动装置，使得辊的速比产生恒定的拉伸 电影网络超过其屈服点。 反馈装置还连续地感测由制动装置和扭矩装置贡献的力并连续地调节扭矩装置，使得下游辊和负载之间的幅材上的力保持恒定在低于幅材的屈服点的水平 。 反馈装置可以连接到显示系统以显示幅材拉伸的量，对负载的纤维网力量以及在卷绕操作中消耗的胶卷的量。
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