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all the characters of the character se supported by the printer are embossed. A standard
character set may have 48, 64 or 96 characters. In order t< enhance the printing speed, the
characters in the character set are embossed several times on the chain/band. For
example, the chain/band of a 64 character set printer may have 4 sets of 64 characters
each embossed on it. In this case, the chaia/band will have altogether 256 (64x4)
characters embossed on it.
In addition to the chain/band, the printer has a set of hammers mounted in front of the
chain/band in such a manner that an inked ribbon and paper can be placed between the
hammers and the chain/band. The total number of hammers is equal to the total number
of print positions. So if there are 132 print positions, then the printer will have 132
The chain/band rotates at a high speed and a character at a print position is printed by
activating the appropriate hammer when the character embossed on the chain/band passes
below it. Since the character set is repeated several times on the chain/band, it is not
necessary to wait for the chain/band to make a complete revolution to position the desired
character in the correct print position.
Unlike the drum of a drum printer, the chain/band of a chain/band printer can be easily
changed. This allows the use of different fonts (styles of characters) and different scripts
(languages) to be used with the same printer. However, just like drum printers,
chain/band printers can only print pre-defined sets of characters that are embossed on the
chain/band used with the printer. Due to this reason, chain/band printers do not have the
ability to print any shape of characters, different sizes of print, and graphics such as
charts and graphs.
Chain/band printers are impact printers because they print by hammering the paper and
the inked ribbon against the characters embossed on the chain/band. Hence they can be used to produce multiple copies by using carbon paper or its equiva...
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- Spring '14