The patented use of multiple pantograph designs produces voids through different density settings on the copier. But in usual practice 3 phase brushless AC Induction motor is used which is powered by the IGBT devices and GTO's. The amount line is printed with different pantograph background than the signature area and the balance of the check.
What is a void pantograph manual#
In addition to manual identification of the void pantograph by a human viewer, a void pantograph can be identified with existing segmentation software. At early stage I.e during primitive starting age of electrical locomotives DC supply was used. After scanning/copying, the void pantograph becomes visible (Figures 5 and 7) to the human eye. A document with a void pantograph is more difficult to duplicate than one with a standard pantograph. I am working on the basis of background 130lpi and the viod text at 65lpi. I have experimented with numerous halftone screen frequency and angle combinations but still haven't found the magic formula. When photocopied by a color copier, the word 'VOID' appears on the copied document. Hi everyone, I am trying to create a void pantograph. This feature will not be visible on the scanned image at the resolution specified in CTS but will easily visible on photocopies and scanned images because the resolution used during such process will content higher resolution which is. Micro Printing - The line creating the border of. 3) VOID pantograph-Pantograph with hidden or embedded COPY or VOID will appear in the cheque. This background is very difficult to copy using a color copy machine. Rainbow Background - A special printing process is required to produce the two color background. What is replicated on a color copy is a robust copy/void warning message. The region has the word VOID hidden/embedded as a security measure. Void Pantograph: A pantograph screen that has the word 'VOID' hidden in it, created by using special screens and background designs. VOID Pantograph - If the check is copied (especially on color copiers) the word VOID appears many times on the face of the copy. A much improved anti-copy pantograph for security documents that is created by utilizing micro-alphanumerical characters to create an encrypted message that cannot be digitally replicated and re-printed. A pantograph (Greek roots παντ- "all, every" and γραφ- "to write", from their original use for copying writing) is a mechanical linkage connected in a manner based on parallelograms so that the movement of one pen, in tracing an image, produces identical movements in a second pen.Įlectric trains can run both on AC as well as dc, depending upon the types of machine/locomotive used. This is a region (included at the printing stage of the cheques) having textural properties like that of a pantograph, and is present near the lower left corner of all the cheques.
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