escpf, escpagef, escpsf, and escpagesf are text filters for Epson compatible 
printers:

escpf:		text to ESC/P code.
escpagef:	text to ESC/Page code.
escpsf:		text to ESC/P code trough ESC/PS mode.
escpagesf:	text to ESC/Page code trough ESC/PS mode.

JIS, and EUC KANJI code are detected and converted automatically.

Read /usr/local/share/doc/escpf/escpf.doc (in English), or escpf.euc 
(in Japanese) for details.