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公开(公告)号：EP0055329A1
公开(公告)日：1982-07-07
申请号：EP81107579.5
申请日：1981-09-23
IPC分类号： B41J9/40
CPC分类号： B41J9/40
摘要： An impact printing mechanism has an electrostatic clutch assembly, including a rotatably mounted semiconductive coated drum (10) and a conductive band (12) wrapped around the circumference thereof. The printing mechanism includes a printing hammer (32) and a print spring (48) for actuating the printing hammer. When a print command is issued, a voltage is applied to the band (12) to create a field between the band and the drum coating. An electrostatic force is thereby generated and when the drum is rotating slowly or synchronous with drum step motion, that motion will pull the band, pivot the hammer and compress the print spring. The potential energy stored in the spring is then ready to fire the hammer. A hammer firing command turns off the voltage pulse and discharges the field, releasing the electrostatic holding force instantaneously and firing the hammer by the compressed spring.
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公开(公告)号：EP0028707A1
公开(公告)日：1981-05-20
申请号：EP80106081.5
申请日：1980-10-07
摘要： An electrostatic clutch operable by the Johnsen-Rahbek effect, which may be used to operate, e.g., a print hammer device (19), is described, said clutch comprising a rotatable drum (5) and a metal band (15) engageable therewith, wherein the engageable surface (7) of the drum is a semiconductive surface prepared by sputtering or vapor depositing a layer (9) of substantially pure silicon carbide onto a conductive substrate (11).
摘要翻译： 描述了可由Johnsen-Rahbek效应操作的静电离合器，其可用于操作例如打印锤装置（19），所述离合器包括可旋转滚筒（5）和与其接合的金属带（15） 其中所述滚筒的可接合表面（7）是通过将基本上纯的碳化硅层（9）溅射或气相沉积到导电基底（11）上而制备的半导体表面。
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