Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1985-02-05
1986-04-01
Sewell, Paul T.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
400 54, 400701, B41J 310, B41J 2900
Patent
active
045794677
ABSTRACT:
A dot printer is adapted to make test printing by driving dot pins (161 to 167) included in a print head (16) before the first character is printed out. More specifically, a central processing unit (1) makes evaluation of the value of a period of approximately one-third of the period required for depression of a printing sheet by the dot pins, thereby to provide the same to an input/output port (6), before print control data for printing the first character is outputted. The input/output port is responsive to the output from the central processing unit to provide a printer driver (9) with a print timing signal of the pulse width of approximately one-third of the pulse width of the print timing signal required for printing the characters. The print driver is responsive to the applied print timing signal to drive the dot pins. As a result, the dot pins are driven for a time period shorter than the period of the normal dot timing signal and therefore the tip ends thereof are brought to a stop immediately before depression of the print sheet. Accordingly, ink left around the dot pins can be removed without leaving any print out on the print sheet.
REFERENCES:
patent: 4179223 (1979-12-01), Kwan
patent: 4184781 (1980-01-01), Ota
patent: 4252448 (1981-02-01), Johnson et al.
patent: 4339208 (1982-07-01), Biedermann
Omron Tateisi Electronics Co.
Sewell Paul T.
LandOfFree
Dot printer with predriving force for removing particles from do does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dot printer with predriving force for removing particles from do, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dot printer with predriving force for removing particles from do will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1082145