High character capacity impact printer

Details High character capacity impact printer High character capacity impact printer

1978-04-07

1980-05-27

Sewell, Paul T.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Including type-faces movable relative to type-face-carrier

400 82, 400149, 400585, B41J 130, B41J 354

Patent

active

042047790

ABSTRACT:
An impact printer of the daisywheel type mechanically links together two daisywheel printer carriages so that the total number of different characters that can be printed is doubled. Suitable coordination logic provides for operation in a first concurrent (or parallel) mode where the user's software looks ahead to provide for continuous printing along a single line. The other mode of operation is sequential where the twin print heads are substantially transparent to the user's system and thus the appropriate print head automatically positions itself to a printing position.

REFERENCES:
patent: 3620344 (1971-11-01), Clancy et al.
patent: 3675753 (1972-07-01), Perucca
patent: 3805938 (1974-04-01), Pearson
patent: 3825681 (1974-07-01), Cederberg et al.
patent: 3892303 (1975-07-01), Willcox
patent: 3966037 (1976-06-01), Zambolin
patent: 4026403 (1977-05-01), Inose et al.
patent: 4030590 (1977-06-01), Wojdyla
patent: 4044880 (1977-08-01), Martin
"High Speed Printer," IBM Tech. Disc. Bulletin, Pawletko et al., vol. 19, No. 9, Feb. 1977, pp. 3355-3356.

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