Printer having print data storage unit

Details Printer having print data storage unit Printer having print data storage unit

1996-07-23

1998-10-06

Hilten, John S.

Typewriting machines

Including control of format and selection of type-face by...

400 70, 395115, B41J 530

Patent

active

058167145

ABSTRACT:
A print data storing unit connected to a printing mechanism of a printer for storing print data and sending the data to the printing mechanism. The storing unit includes a buffer memory which has a data storing region A having a storage capacity capable of storing therein data of one line and a temporary data storing region B having a storage capacity half the storage capacity of the data storing region A. The data storing region A is divided into two storage sections, and each storage section is divided into right storage section A1, A3 and left storage section A2 and A4. Print data of a first line are stored in the data storing region A, and when printing is started based on the print data, storage of print data of the front half portion of a second line in the temporary data storing region B is started. When the half portion of the first line is printed, storage into the empty section A1 and A3 of print data of a remaining rear half portion of the second line is started. Upon completion of first line printing, the print data stored in the storage sections A1 and A3 are transferred to the storage sections A3 and A4, and the data stored in the temporary storing region B is transferred to the sections A1 and A2 for the second line printing.

REFERENCES:
patent: 3651487 (1972-03-01), Washington
patent: 4048625 (1977-09-01), Harris, Jr. et al.
patent: 5102244 (1992-04-01), Takeda
patent: 5440684 (1995-08-01), Tack et al.

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