Line printer having hammer which spans three print positions

Details Line printer having hammer which spans three print positions Line printer having hammer which spans three print positions

1974-09-16

1976-06-01

Fisher, J. Reed

Printing

Selective or progressive

Bed and platen machines

101111, B41J 120

Patent

active

039600742

ABSTRACT:
A line printer which comprises a frame, a hammer bank secured to the frame, the hammer bank including a plurality of hammers, a ribbon that is movable past the hammers, a recirculating character belt which comprises a plurality of characters, and a band gate having an adjustable pulley arrangement for removably carrying the character belt. The band gate is pivotally mounted to the frame in such a manner that the distance between the hammers and the characters is adjustable to accommodate paper of varying thicknesses. A phasing circuit controls the firing of the hammers. An adjustable paper feed mechanism controls the positioning of continuous paper form as it passes through the print line, and a stepping motor controls the paper feed mechanism to provie 6 or 8 print lines per inch in such a manner as to reduce the time required to advance the paper to the next print line. Each hammer face spans three print positions, and the character pitch is greater than the width of a hammer face such that each hammer is able to strike a single selected character in three successive print positions.

REFERENCES:
patent: 3220343 (1965-11-01), Wasserman
patent: 3220343 (1965-11-01), Wasserman
patent: 3451335 (1969-06-01), Cunningham
patent: 3550745 (1970-12-01), Bisone
patent: 3611923 (1971-10-01), Haramia
patent: 3747521 (1973-07-01), Hamilton et al.
patent: 3752069 (1973-08-01), Stiles
patent: 3805697 (1974-04-01), Mahe
patent: 3823667 (1974-07-01), Babler

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