Browse Prior Art Database

Maxi Head Printer

IP.com Disclosure Number: IPCOM000045404D
Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Sheiner, LS: AUTHOR [+2]

Abstract

Existing wire matrix line printers, such as the IBM 5224 and 5225 models, utilize 64-wire matrix actuators positioned on a horizontal line and are capable of printing at 10 characters per inch and 6 lines per inch with a throughput of approximately 560 lines per minute. By placing the actuators in a single vertical head, a significant increase in throughput, that is, lines per minute, can be achieved because the actuator efficiency is improved. The actuator efficiency is defined as the lines per minute divided by the number of actuators.

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Maxi Head Printer

Existing wire matrix line printers, such as the IBM 5224 and 5225 models, utilize 64-wire matrix actuators positioned on a horizontal line and are capable of printing at 10 characters per inch and 6 lines per inch with a throughput of approximately 560 lines per minute. By placing the actuators in a single vertical head, a significant increase in throughput, that is, lines per minute, can be achieved because the actuator efficiency is improved. The actuator efficiency is defined as the lines per minute divided by the number of actuators.

The throughput printer with a printhead that moves horizontally across the page to print a line is defined by the following equation: LPM=N X 60/M(T) + TA(T) LPM=Throughput in lines/minute N =Number of lines printed

per head movement across

the page

M(T) Time for head motion

(print time) - head travel/

head velocity

TA(T)=Time for head to reverse

directions and/or vertical

paper motion (non-print

time).

One manner to increase the throughput of the printer is to increase N, the number of lines printed per head movement across the paper, and/or to decrease M(T), the head motion time, and TA , the head reversal/paper motion time. The M(T) and TA(T) times can be decreased by a factor of 2 at most. This decrease in the time requires a significantly faster actuator and a more powerful head- reversing motor, driver and power supply and a more powerful forms motor, driver and power supply. Since faster and more powerful...