Browse Prior Art Database

Multiple Pass Printer

IP.com Disclosure Number: IPCOM000084992D
Original Publication Date: 1976-Feb-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Martin, BR: AUTHOR

Abstract

The speed of traverse of the carrier in a disk type printer is usually determined by the time required for the disk to index to any desired character between adjacent print positions. The speed of the carrier must either be slow enough so that the disk can index and the hammer fire in the worst-case conditions, or provision must be made for stopping or slowing down the carrier between print positions.

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Multiple Pass Printer

The speed of traverse of the carrier in a disk type printer is usually determined by the time required for the disk to index to any desired character between adjacent print positions. The speed of the carrier must either be slow enough so that the disk can index and the hammer fire in the worst-case conditions, or provision must be made for stopping or slowing down the carrier between print positions.

Increased performance can be achieved if the carrier speed is increased, such that under certain worst-case conditions it is not possible to print all of the desired characters on a particular line.

That is, in certain cases when the carrier traverses a line some characters will be skipped. When this occurs, the carriage will traverse the same line again and the characters which were not printed on the first pass will be printed on the second pass.

For example, in a disk printer with a continuously rotating disk the speed of the disk and the speed of the carrier can be coordinated, so that the disk makes one complete revolution each two character positions. Two complete sets of characters are on the disk. In such a system, if the carrier speed is high enough there is some probability that under certain conditions the hammer cannot fire fast enough to print the desired characters in two adjacent character positions. In this case, the character in one position would be skipped and the line would be traversed again. The skipped character is filled...