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Bottom Margin Detection for Last Line Printing

IP.com Disclosure Number: IPCOM000043398D
Original Publication Date: 1984-Aug-01
Included in the Prior Art Database: 2005-Feb-04

Publishing Venue

IBM

Related People

Authors:
Raesz, R Scully, KJ [+details]

Abstract

To provide an auto pagination function in a printer that supports vertical tabs and prints on various lengths of paper, the printer utilizes two bottom edge sensors and an algorithm to print on the last possible line while managing widow lines and the various sized indexes and vertical tabs, and also maintaining optimum print throughput. To accomplish pagination, the arrangement of the two margin sensors should be such that the second sensor is at least one inch from the first sensor (approximately). This allows room to make decisions regarding the placement of widow lines. Widow lines will be either placed on the current page along with another line or be put on the next page. Large vertical tabs are broken down by algorithm into indexing steps that are smaller than the distance between the two sensors.