paper got feed in unproper position.
wrong type of paper (letter, a4, legal...etc)
Disfungsional roller
if you used paper is involved - forgeting there's a staples on it !
Dust
blockage in the paper path
hardware it self
Damp paper, or rollers out of alignment.
Because of the gravity of the earth....ngek...
pin-feed paper
Provided the printer is working properly, the likely cause is usually poor quality paper (too flimsy), or paper poorly stored and allowed to become damp.
A dotmatrix printer uses a ribbon and pins to transfer Inc. onto paper. This type of printer is no longer made and very few are still in use.
Continuous Forms
A dot matrix is an impact printer. Either 9 or 24 pins are fired against an inked ribbon to leave marks on the paper. An impact printer enables printing to be done on each sheet of multi-paged listing paper.
platter
Dot Matrix
A dot matrix printer uses continuous, fan-fold paper. Such paper is fed through the printer by pegs on a roller engaging holes along both edges of the paper.
dot matrix printer
It is an impact printer. Someone else has already asked this.
dot matrix