公开(公告)号：US4167013A

公开(公告)日：1979-09-04

申请号：US772196

申请日：1977-02-25

申请人： Phillip K. Hoskins ,  Harmon W. Johnson

发明人： Phillip K. Hoskins ,  Harmon W. Johnson

IPC分类号： B41J2/125 ,  B41J2/13 ,  B41J19/20 ,  G01D15/18

CPC分类号： B41J2/125 ,  B41J19/202 ,  B41J2/13

摘要： Electronic lead determining circuitry operates to advantage with nonconstant relative movement between a paper record medium and an ink drop projector carrier of ink drop printing apparatus. Electronic lead determining circuitry is arranged for calculating the proper lead times for displacing the normal print enabling signals by factors dependent on the actual carrier positions and the lead for projecting ink drops at the desired positions.Ink drop printing apparatus of the type having a carrier bearing an ink drop projector across a record medium at a velocity relative to the record medium which may be varying substantially--either by design or unintentionally--, and bearing print position location detecting elements, and bearing ink drop projection controlling elements is perfected by controlling electronic circuitry for calculating lead time at a given print position for enabling printing at a predetermined designated print position precisely at the predetermined desired location on the paper. Preferably, a velocity-time profile for the apparatus is chosen for low g-force loading of the moving components, and printing is effective over most of the profile in contradistinction to conventional printing over linear portions only of conventional profiles. Phase locked oscillator loop circuitry is used for tracking the carrier position and adjusting phase, while several alternate lead calculating circuits are arranged in cooperation therewith. Print position and carrier travel direction data are updated in real time as the apparatus operates under data processing control.

摘要翻译： 电子导线确定电路有利于纸记录介质和墨滴打印装置的墨滴投影仪载体之间的非恒定的相对运动。 电子引线确定电路被布置成用于计算用于使正常打印使能信号移位的适当提前时间，其依赖于实际载体位置和用于将墨滴投影在期望位置的引线。