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Variable Image Generation Cycle in Page Printer

IP.com Disclosure Number: IPCOM000047077D
Original Publication Date: 1983-Sep-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 81K

Publishing Venue

IBM

Related People

Tokunaga, E: AUTHOR

Abstract

This article describes variable image generation cycle in a page printer by comparing the message length of current line with the message length of a preceding line. This article improves the operational speed of image generation of the prior page printer wherein the image generation cycle is designed to repeat from the first column or character position to the last column or character position over the maximum length of one print line on a print sheet. This article provides a variable image generation cycle in which the cycle is varied in accordance with the length of the line message. Fig. 1 shows a block diagram for providing the variable image generation cycle. The input page data is supplied to an end-of-line sensor 1 through an input data line.

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Variable Image Generation Cycle in Page Printer

This article describes variable image generation cycle in a page printer by comparing the message length of current line with the message length of a preceding line. This article improves the operational speed of image generation of the prior page printer wherein the image generation cycle is designed to repeat from the first column or character position to the last column or character position over the maximum length of one print line on a print sheet. This article provides a variable image generation cycle in which the cycle is varied in accordance with the length of the line message. Fig. 1 shows a block diagram for providing the variable image generation cycle. The input page data is supplied to an end-of- line sensor 1 through an input data line. The end-of-line sensor 1 partitions the input page data into the plural print line data by sensing the end-of-line code. The data processor 2 identifies the first column position occupied by the the first character code and last column position occupied by the last character code in the printline data. These first and last column positions in the print line data are set into counters 5 and 6, respectively. Counters 7 and 10 are initialized to the leftmost column position, i.e., "0", and the rightmost column position, i.e., Max value, respectively, of the print line of the maximum length. These counters 7 and 10 are updated by the values from the counters 5 and 6, respectively, at the end of the image generation cycle. The data processor 2, which includes a code conversion table 3, converts the character codes to the internal codes. The internal codes are stored in one-line code buffer 4. At the time that the end-of-line sensor 1 senses the end of line code, a compare circuit 8 compares the column positions in the counters 5 and 7 to set the smaller value between them into a counter 9, and a compare circuit 11 compares the column positions in the counters 6 and 10 to set the la...