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    • 1. 发明授权
    • Mounting printing plates
    • 安装印版
    • US4744297A
    • 1988-05-17
    • US858934
    • 1986-05-01
    • Louis M. SardellaJohn B. WestJohn R. HarrisonDennis J. ParrEdward H. Harrison
    • Louis M. SardellaJohn B. WestJohn R. HarrisonDennis J. ParrEdward H. Harrison
    • B41F27/12B41F27/06
    • B41F27/12
    • Apparatus for mounting a flexible printing plate comprises a printing cylinder having a surface upon which the printing plate is mountable, and a connection for applying subatmospheric pressure inside the cylinder. A plurality of valves selectively apply the subatmospheric pressure to the surface from inside the cylinder. These valves have depressable actuating members protrudable above the cylinder surface. Those actuating members contacted by the printing plate when applied to the cylinder surface are depressed thereby to effect application of subatmospheric pressure to beneath the printing plate to draw the plate against the cylinder. Preferably, grooves are provided in the cylinder surface for distribution of the subatmospheric pressure beneath the plate. Advantageously, the printing plate may have a thin, highly flexible and deformable fringe along its trailing edge to seal the surface grooves, at that location. This mounting arrangement facilitates quick changing of printing plates during printing operations.
    • 用于安装柔性印版的装置包括具有可安装印版的表面的印刷滚筒和用于在滚筒内施加低于大气压的连接。 多个阀从气缸内部选择性地将低于大气压的压力施加到表面。 这些阀具有可在气缸表面上方突出的可按压的致动构件。 当压印在滚筒表面上时,由印版接触的那些致动构件被压下,从而在印版的下方施加低于大气压的压力,以使板抵靠气缸。 优选地,在气缸表面中设置有凹槽,用于将低于大气压的压力分配在板下方。 有利地,印版可以具有沿其后缘的薄的,高度柔性和可变形的边缘,以在该位置处密封表面凹槽。 这种安装布置有助于在打印操作期间快速更换印版。
    • 2. 发明授权
    • Die mounting apparatus
    • 模具安装装置
    • US4683822A
    • 1987-08-04
    • US776775
    • 1985-09-17
    • Louis M. SardellaJohn B. WestJohn R. HarrisonDennis J. Parr
    • Louis M. SardellaJohn B. WestJohn R. HarrisonDennis J. Parr
    • B41F27/12B41F27/06
    • B41F27/12Y10T83/7747
    • Apparatus for mounting a flexible printing plate comprises a printing cylinder having a surface upon which the printing plate is mountable, and a connection for applying subatmospheric pressure inside the cylinder. A plurality of valves selectively apply the subatmospheric pressure to the surface from inside the cylinder. These valves have depressable actuating members protrudable above the cylinder surface. Those actuating members contacted by the printing plate when applied to the cylinder surface are depressed thereby to effect application of subatmospheric pressure to beneath the printing plate to draw the plate against the cylinder. Preferably, grooves are provided in the cylinder surface for distribution of the subatmospheric pressure beneath the plate. Advantageously, the printing plate may have a thin, highly flexible and deformable fringe along its trailing edge to seal the surface grooves, at that location. This mounting arrangement facilitates quick changing of printing plates during printing operations.
    • 用于安装柔性印版的装置包括具有可安装印版的表面的印刷滚筒和用于在滚筒内施加低于大气压的连接。 多个阀从气缸内部选择性地将低于大气压的压力施加到表面。 这些阀具有可在气缸表面上方突出的可按压的致动构件。 当压印在滚筒表面上时,由印版接触的那些致动构件被压下,从而在印版的下面施加低于大气压的压力,以使板抵靠气缸。 优选地,在气缸表面中设置有凹槽,用于将低于大气压的压力分配在板下方。 有利地,印版可以具有沿其后缘的薄的,高度柔性和可变形的边缘,以在该位置处密封表面凹槽。 这种安装布置有助于在打印操作期间快速更换印版。
    • 3. 发明授权
    • Vacuum die mount
    • 真空模具安装
    • US4878407A
    • 1989-11-07
    • US194743
    • 1988-05-17
    • John R. HarrisonGary L. LehrDennis J. ParrWilliam F. Ward, Jr.Robert R. Wells
    • John R. HarrisonGary L. LehrDennis J. ParrWilliam F. Ward, Jr.Robert R. Wells
    • B31B1/14B26D7/26B26F1/42B41F27/12
    • B41F27/12B26D7/2614B26F1/42B26D2007/2607Y10S101/46Y10T279/11Y10T83/04Y10T83/089Y10T83/148Y10T83/9372Y10T83/9464
    • A method and apparatus for mounting a die, particularly a rigid cutting die, on a die cylinder includes having a bubble along a seal on the die to bridge any gaps between the die and the die cylinder when the die is initially positioned on the die cylinder. This bubble seal enables a vacuum to be applied between the initially positioned die and the die cylinder to pull the die down against and into conformity with the surface of the die cylinder, at the same time flattening the bubble seal. A key at a trailing edge of the die locates in an axial keyway in the die cylinder to circumferentially position the die; a bolt is then inserted at a leading edge of the die to establish axial location. During operation the die is held in position by the vacuum. Beam sensors and light reflectors may be incorporated to sense when a wrong die is present and shut down the apparatus. Ball valve members may be incorporated in the surface of the die to distribute the vacuum and also to enable the die to be rolled along the surface of the die cylinder while initially being positioned.
    • 用于将模具,特别是刚性切割模具安装在模具圆筒上的方法和装置包括沿模具上的密封件具有气泡,以在模具最初定位在模具缸上时桥接模具和模具缸体之间的任何间隙 。 该气泡密封件使得能够在初始定位的模具和模具缸之间施加真空,以将模具向下压靠在模具缸的表面上并与模具缸体的表面一致,同时使气泡密封件变平。 在模具的后缘处的键位于模具缸中的轴向键槽中以使模具周向地定位; 然后将螺栓插入模具的前缘以建立轴向位置。 在操作期间,模具通过真空保持就位。 可以结合光束传感器和光反射器来感测何时存在错误的管芯并关闭设备。 球阀构件可以结合在模具的表面中以分布真空,并且还使得模具能够在最初定位时沿着模具缸的表面滚动。
    • 4. 发明授权
    • Methods and apparatus for extracting integer remainders
    • 用于提取整数余数的方法和装置
    • US07979486B2
    • 2011-07-12
    • US11946593
    • 2007-11-28
    • John R. HarrisonPing T. Tang
    • John R. HarrisonPing T. Tang
    • G06F7/535
    • G06F7/535G06F7/72G06F2207/5356
    • Methods and apparatus to determine a remainder value are disclosed. A disclosed example method involves, during a compilation phase, causing a processor to multiply a dividend value by a first value to generate a second value associated with a product. The first value is associated with a scaled approximate reciprocal of a divisor value, and the scaled approximate reciprocal of the divisor value is determined using a compound exponent value. During a runtime phase, the processor is caused to multiply a third value from the second value. The third value is generated using at least a subset bitfield of the second value. During the runtime phase, the processor is caused to determine a remainder value based on the third value. The processor is caused to store the remainder value in a memory.
    • 公开了确定余数值的方法和装置。 所公开的示例性方法涉及在编译阶段期间使处理器将分红值乘以第一值以生成与产品相关联的第二值。 第一个值与除数值的缩放近似倒数相关联,并且使用复合指数值确定除数值的缩放近似倒数。 在运行阶段期间,使处理器从第二个值乘以第三个值。 使用第二值的至少子集位字段来生成第三值。 在运行阶段期间,使处理器基于第三值来确定余数值。 使处理器将余数值存储在存储器中。
    • 8. 发明授权
    • Method for achieving correctly rounded quotients in algorithms based on fused multiply-accumulate without requiring the intermediate calculation of a correctly rounded reciprocal
    • 基于融合乘法积分的算法实现正确舍入商的方法,无需中间计算正确圆角的倒数
    • US06598065B1
    • 2003-07-22
    • US09471651
    • 1999-12-23
    • John R. Harrison
    • John R. Harrison
    • G06F752
    • G06F7/535G06F7/4873G06F7/49963
    • A method and apparatus for performing a floating point division of a dividend (a) by a divisor (b) to produce a correctly rounded-to-nearest quotient (q′) having a mantissa of P bits in a data processing system is disclosed. In one embodiment, the data processing system computes a current quotient estimate (qm′, where m represents an integer and m>=0) that is within 1 ulp of a true quotient (a/b). Then the data processing system computes a current remainder estimate (rm′) based on the dividend (a), the divisor (b) and the current quotient estimate (qm′). The data processing system also computes a current reciprocal estimate (yn′, where n represents an integer and n>=0) based on a reciprocal intermediate value (E) with a relative error with respect to a true reciprocal of the divisor (1/b) of less than or equal to z/(22P) (where z is an integer derived from error analyses of computations of the current reciprocal estimate (yn′)). Finally, the data processing system obtains the correctly rounded-to-nearest quotient (q′), except possibly when z>=(2P−Mb) (where Mb represents mantissa of the divisor, b), based on the current remainder estimate (rm′), the current reciprocal estimate (yn′) and current quotient estimate (qm′).
    • 公开了一种用于通过除数(b)执行被除数(a)的浮点除法以在数据处理系统中产生具有P比特的尾数的正确舍入到最近商(q')的方法和装置。 在一个实施例中,数据处理系统计算在真商(a / b)的1 ulp内的当前商估计(qm',其中m表示整数,m> = 0)。 然后,数据处理系统基于分红(a),除数(b)和当前商估计(qm')计算当前剩余估计(rm')。 数据处理系统还基于相对误差相对于除数(1/1)的真实倒数的互逆中间值(E)计算当前的互逆估计(yn',其中n表示整数,n> = 0) b)小于或等于z /(22P)(其中z是从当前互逆估计(yn')的计算的误差分析导出的整数),最后,数据处理系统获得正确四舍五入 商q(q'),除了当z> =(2P-Mb)(其中Mb表示除数的尾数b)时,根据当前的剩余估计(rm'),当前的倒数估计(yn')和当前值 商估计(qm')。