Line Printer
The
line printer is an impact printer in which one line of text is printed at a
time. They are mostly associated with unit record equipment and the early days
of digital computing, but the technology is still in use.
A
line printer is a high‐speed printer capable of printing an entire line of text
at once instead of one or more characters at a time. These types of printers
are too fast to be measured in words or characters per minute, and instead are
measured in lines per minute. For example, a line printer may be capable of
printing over 3,000 lines of type per minute.
A
high‐speed printer capable of printing an entire line at one time. A fast line
printer can print as many as 3,000 lines per minute. The disadvantages of line
printers are that they cannot print graphics, the print quality is low, and
they are very noisy.
Line
Printers: ‐ Line Printer can Print One Line at a Time. The line printer is a
form of high speed impact printer. They can Print 300 to 3000 Lines per Minute.
So that they are very fast. Large Computer system typically uses Line Printer.
The Line Printers are of two Types.
Drum
Printers: ‐ Drum Printer consists of a Drum Which Consists of a Number of
Characters; those are Printed on the Drum. And the Number of Characters or
Number of Tracks are Divided, after examining the width of the Paper. But there
are also Some Character sets Available Means the Number of Characters those are
printed on the Paper. For Example 64, and 96 Characters etc.
In
this Paper is placed between the Ribbon and the Head or Hammer there are many
hammers on the Front of Drum. In this Drum Rotates at a Very High Speed and
character is printed by activating the Appropriate Hammer. So always remember
that All the Characters are never printed at a Time, but they are printed at a
very high Speed. And they can print only a Pre Defined Styles because the Drum
has a Specific Characters. Those are placed on the Drum. So that they cant
print the various Types of Fonts and Color Pictures. And Drum Printers are also
noisy because they use Hammering Techniques.
Chain
Printers: These are also Line Printers, which Prints one Line at a Time. All
the Characters are printed on the Chain and the Set of Characters are placed on
the Chain. There are 48 and 64 and 96 Characters set Printers are Available.
There are also Some Hammers, those are Placed in Front of the Chain, and Paper
is Placed between the Hammer and the Inked Ribbon. The Total Number of Hammers
will be Equals to the Total Number of Print Positions.
In
this Chain Rotates at a Very High Speed and Character is printed by activating
the Appropriate Hammer of the Character. Chain Printers can also print some Pre
Defined characters and we can’t Display the High Quality of Fonts and Font
Styles. They are also Impact Printers and Also Noisy because they Prints the
Characters by Hammering Action. And these Printers can print the 400 to 3000
Lines Per Minute.
