公开(公告)号：US3689693A

公开(公告)日：1972-09-05

申请号：US3689693D

申请日：1970-11-17

申请人： MEAD CORP

发明人： CAHILL LYSLE D ,  MARSHALL WILLIAM W ,  THOMAS EDWARD R ,  THOMPSON HAROLD P

IPC分类号： H04N1/034 ,  G01D15/18 ,  H04N1/04 ,  H04N1/28

CPC分类号： H04N1/034

摘要： A method of and apparatus for reproducing a graphic representation includes a scanner for scanning the original along a series of contiguous lines and transmitting an analog signal proportional to the intensity of the scanned area to an analog to digital convertor to provide a series of parallel, binary signals. Circuitry is provided which permits the digital signals to be stored and retrieved as a number of simultaneous signals from corresponding points in an equal number of transverse bands across the original. The retrieved digital signals are then used to control a bank of drop projectors, equal in number to the transverse bands, which project drops toward a receiving member mounted on a rotating cylinder, with the drop generators moving incrementally, axially of the cylinder, one line spacing each revolution of the cylinder to cause the reproduction to be produced as a series of contiguous, transverse bands corresponding to the transverse bands of the original.

摘要翻译： 用于再现图形表示的方法和装置包括：扫描器，用于沿着一系列连续的线扫描原稿，并将与扫描区域的强度成比例的模拟信号发送到模数转换器，以提供一系列平行的二进制 信号。 提供电路，其允许将数字信号作为来自对应点的多个同时信号进行存储和检索，该信号在原始数据的相同数量的横向频带中。 所检索的数字信号然后用于控制一组投影机，其数量等于横向带，其突出向安装在旋转气缸上的接收构件落下，液滴发生器沿圆柱体的轴向逐渐移动，一行 间隔圆柱体的每一圈，以使再现产生为与原件的横向带相对应的一系列连续的横向带。

公开(公告)号：US3604846A

公开(公告)日：1971-09-14

申请号：US3604846D

申请日：1969-03-03

申请人： MEAD CORP

发明人： BEHANE DAVID ,  SPRADLEY LEWIS H ,  CAHILL LYSLE D ,  MARSHALL WILLIAM M

IPC分类号： B41J2/52 ,  B41J2/205 ,  B41J5/30 ,  G06K15/10 ,  H04N1/034 ,  H04N1/23 ,  H04N1/405 ,  H04N1/407 ,  H04N1/04 ,  H04N1/28 ,  H04N1/40

CPC分类号： H04N1/034 ,  H04N1/4055 ,  H04N1/4078

摘要： Reproduction of original graphic representations is accomplished by (a) optically scanning an original (b) producing a density scaled digital output (c) processing this information to derive code signals defining relative density of incremental areas as an increment matrix of one or more dots, and (d) placing dots on a receiving member according to these code signals. During processing the span of the density scale can be adjusted to enhance contrast in all or some areas of the image, without loss of mensuration accuracy. The printout is made through control of individual marking drops which are selectively charged and deposited on or diverted from the receiving member according to the code signals.

公开(公告)号：US3629495A

公开(公告)日：1971-12-21

申请号：US3629495D

申请日：1969-03-03

申请人： MEAD CORP

发明人： CAHILL LYSLE D

IPC分类号： H04N1/10 ,  H04N1/04 ,  H04N1/28

CPC分类号： H04N1/1008

摘要： A scanner focuses a beam of radiant energy, in the order of one micron diameter, and this beam is scanned over a graphic representation, such as a photographic negative or film positive. The amount of radiant energy passing through the graphic representation varies with the density of the image at any given spot and is sensed by a transducer. This variable signal is converted to a digital signal which is recorded at regular intervals. The scanning movement and the recording frequency are both clocked from a crystal controlled oscillator, resulting in a precisely controlled digital signal output which is recorded for subsequent reproduction of the image represented.