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公开(公告)号：US4759285A
公开(公告)日：1988-07-26
申请号：US72910
申请日：1987-07-14
申请人： Russel N. Fox , Keith K. Klett
发明人： Russel N. Fox , Keith K. Klett
摘要： A method for conducting a proofing operation of a rotogravure printing cylinder includes preparation of a steel drum having in sequence from the outer steel surface a layer of plastic such as Mylar.RTM., a blanket consisting of a rubber composite material, a paper/foil layer with the foil side facing outwardly, and a proofing sheet consisting of normal printing paper. The rotogravure cylinder which is to be proofed is brought into contact with the thus-prepared drum, and a high voltage is applied to the foil via the proofing sheet. The rotogravure cylinder is inked and rotated through one printing revolution so that a complete impression is made on the proofing sheet. The high voltage assists in the transfer of ink from the cups of the rotogravure cylinder to the proofing sheet. The impression produced by the rotogravure cylinder can then be checked before the rotogravure cylinder is sent to a user.
摘要翻译： 用于进行轮转凹版印刷滚筒的打样操作的方法包括制备钢桶，其从外钢表面依次由一层塑料如Mylar TM，由橡胶复合材料组成的橡皮布，具有 箔面朝外，以及由普通打印纸构成的打样片。 待打样的轮转凹版滚筒与如此制备的滚筒接触，并通过打样片向箔片施加高电压。 轮转凹版滚筒通过一次打印旋转进行着墨和旋转，从而在打样片上进行完整的印象。 高电压有助于将油墨从轮转凹版滚筒的杯子转移到校样片。 然后可以在将轮转凹版滚筒送到使用者之前检查由凹版印刷滚筒产生的印象。
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公开(公告)号：US4075503A
公开(公告)日：1978-02-21
申请号：US718029
申请日：1976-08-26
申请人： Keith K. Klett
发明人： Keith K. Klett
CPC分类号： H02J9/065 , Y10T307/615 , Y10T307/625
摘要： An emergency lighting system including an inverter for operating a fluorescent lamp from a battery upon failure of the primary AC voltage source. A transformer connected to the AC source is provided with a single secondary winding for providing both current for charging the battery and a voltage proportional to the AC voltage to circuit inhibit means for allowing inverter operation when AC voltage falls below a predetermined level.
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公开(公告)号：US5243487A
公开(公告)日：1993-09-07
申请号：US630865
申请日：1990-12-20
申请人： Keith K. Klett
发明人： Keith K. Klett
摘要： A gravure printing press with an electrostatic assist unit having a fault detection circuit and crowbar circuit in which the crowbar circuit has a transformer with a primary winding and a plurality of secondary windings. Each of the secondary windings has a field-effect transistor which is turned on in response to the detection of a fault condition whereby the voltage applied to the press is substantially reduced to zero and any electrostatic charge is substantially removed. A capacitor is coupled in parallel with the gate and source terminals of each field-effect transistor to lengthen the on-time of the transistors.
摘要翻译： 一种具有静电辅助单元的凹版印刷机，其具有故障检测电路和短路电路，其中所述短路电路具有具有初级绕组和多个次级绕组的变压器。 每个次级绕组具有场效应晶体管，其响应于故障状况的检测而导通，由此施加到压机的电压基本上减小到零，并且基本上去除了任何静电电荷。 电容器与每个场效应晶体管的栅极和源极端子并联耦合，以延长晶体管的导通时间。
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公开(公告)号：US4360850A
公开(公告)日：1982-11-23
申请号：US89309
申请日：1979-10-30
摘要： A high-voltage crowbar circuit continually senses the load impedance and crowbars the output voltage applied to a load if the load impedance falls below a selected value. A differentiator circuit at the load senses variations in load voltage and can trigger the crowbar operation if the voltage variation as a function of time exceeds a preselected load.
摘要翻译： 如果负载阻抗低于所选择的值，则高电压短路电路会持续感测负载阻抗，并使得施加到负载的输出电压产生撬动。 负载的微分电路会感测负载电压的变化，如果电压变化随时间的变化而超过预选负载，则可以触发撬棒操作。
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