Browse Prior Art Database

High Speed Impact Line Printer

IP.com Disclosure Number: IPCOM000062466D
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Helinski, E: AUTHOR [+8]

Abstract

A high speed line printer prints multiple lines of data on a continuous print medium using a single continuously rotating type carrier having two character rows with two print hammer rows. As seen in the figure, the type carrier comprises an endless type band 10 with two horizontal rows of engraved type characters 11 and 12. The type characters are uniformly spaced and vertically aligned and preferably distributed in identical sequence. Timing pulses are generated from a transducer 13 sensing a single row of timing marks 14 spaced uniformly with the type characters 11 and 12. Transducer 15 senses marks 16 for identifying the type band 10 and the home position of the two rows of characters. The vertical spacing of the characters coincides with a distance of several print lines.

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High Speed Impact Line Printer

A high speed line printer prints multiple lines of data on a continuous print medium using a single continuously rotating type carrier having two character rows with two print hammer rows. As seen in the figure, the type carrier comprises an endless type band 10 with two horizontal rows of engraved type characters 11 and 12. The type characters are uniformly spaced and vertically aligned and preferably distributed in identical sequence. Timing pulses are generated from a transducer 13 sensing a single row of timing marks 14 spaced uniformly with the type characters 11 and 12. Transducer 15 senses marks 16 for identifying the type band 10 and the home position of the two rows of characters. The vertical spacing of the characters coincides with a distance of several print lines. Hammers 17 of upper hammer unit 18 align with an upper row of type characters 11. Hammers 19 of the lower hammer unit 20 align with the lower row of type characters 12. In the course of a print operation, print hammers 17 and 19, with separate print controls for activating drivers 21 and 22, are operated to print two lines of data at separate spaced print lines. Paper 23 is then moved by tractors 24 and 25 for printing at the intermediate as well as other print lines. When the intermediate lines of data are printed, tractors 24 and 25 are operated to move the paper 23 several lines at a time. The arrangement allows printing of two print lines in a single print...