printer and its type ppt pdf computer file

computer printer and its type

1. ASSIGNMENT

2. PRINTER , ITS TYPES
AND ITS MECHANISM OF
WORKING.

3. A PRINTER IS A PERIPHERAL DEVICE USED FOR
PRINTING THE OUTPUT ON A PAPER OR ANY OTHER
PRINTABLE MEDIA.THE PRINTED INFORMATION ON A
PAPER IS CALLED A HARD COPY. PRINTERS ARE OF
TWO TYPES:
1. IMPACT PRINTERS
2. NON-IMPACT PRINTERS
PRINTERS AND ITS TYPE

4. IMPACT PRINTERS ALLOW PHYSICAL CONTACT
BETWEEN THE PRINTER HEAD AND PAPER,THEY PRINT
BY THE IMPACT OF DOT WIRES ON PAPER. THEY ARE
ALSO KNOWN CHARACTER PRINTERS.
IMPACT PRINTERS ARE CLASSIFIED AS FOLLOWS:
1.DAISY WHEEL PRINTERS
2.DOT MATRIX PRINTERS

1. Impact Printers

5. DAISY WHEEL PRINTERS
They produce
letter quality
documents.The
speed of these
printers varies
from 60 cps to
120 cps(character
per second).They
are not in use
anymore since
they were very
slow and noisy.

6. DOT MATRIX PRINTERS
They are noisy
and do not have
good printing
quality.As a result
,they are losing
popularity
.Besides text,they
are capable of
printing charts
and graphics
.They are
relatively
economical.

7. NON-IMPACT PRINTERS DONOT ALLOW PHYSICAL
CONTACT BETWEEN THE PRINTING HEAD AND
PAPER,THEY DO NOT STRIKE AGAINST THE INKED
RIBBON OR THE PAPER WHICH IS BEING PRINTED.
WHEREAS ,ONLY THE INK USED FOR
PRINTING,TOUCHES THE PAPER.IT CAN PRODUCE
BETTER PRINT QUALITY AND COLOURED GRAPHICS AS
WELL.
NON IMPACT PRINTERS ARE CLASSIFIED AS :
1.THERMAL PRINTERS
2.INK-JET PRINTERS
3.LASER PRINTERS
NON IMPACT PRINTERS

8. Thermal Printers
Thermal printers
use a special
heat sensitive
paper.
Characters are
formed when
heated elements
come in contact
with heat
sensitive
paper,thus
forming
darkened dots

9. Ink-Jet Printers
They produce images
by spraying tiny
droplets of ink onto
the paper. They have
very high quality
output and can also
produce coloured
graphics. They are
cheap and ideal for
home/ office. The
cartridge is quite costly
and needs to be
replaced more
frequenty

10. Laser printers

These printers use
photocopy technology
to print .laser printer use
a laser beam and dry
powdered ink called
toner to produce a fine
dot matrix pattern. The
quality of output on
paper is very good

11. SUBMIT TO : GURNAM SIR

MADE BY- MEHUL
ROLL NO- 22
CLASS – 8 C