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Printer Hammer Driver Sharing Arrangement

IP.com Disclosure Number: IPCOM000042701D
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Thorne, WD: AUTHOR

Abstract

In a printer the number of hammers is arranged to be greater than the number of drivers. Certain drivers are selectively coupled to two hammers through switches. Normally the drivers are coupled to the most frequently used hammers. When additional hammers are needed, the drivers are switched to the alternative hammers which are actuated in a second printing operation without moving the print medium. This arrangement saves the cost of drivers which are not frequently used, and reduces the power supply requirements. The figure illustrates the arrangement diagrammatically. A printer is formed with a plurality of hammer actuators 1, 2, 3. The actuators 1, 2 are used to print characters in a line of normal length, and the actuators 3 are used only when characters are to be printed in a print line of longer than normal length.

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Printer Hammer Driver Sharing Arrangement

In a printer the number of hammers is arranged to be greater than the number of drivers. Certain drivers are selectively coupled to two hammers through switches. Normally the drivers are coupled to the most frequently used hammers. When additional hammers are needed, the drivers are switched to the alternative hammers which are actuated in a second printing operation without moving the print medium. This arrangement saves the cost of drivers which are not frequently used, and reduces the power supply requirements. The figure illustrates the arrangement diagrammatically. A printer is formed with a plurality of hammer actuators 1, 2, 3. The actuators 1, 2 are used to print characters in a line of normal length, and the actuators 3 are used only when characters are to be printed in a print line of longer than normal length. The printer includes a plurality of drivers 4, 5. Drivers 4 are connected to actuators 1 in one to one correspondence. Drivers 5 are normally connected through switches 6 to actuators 2 in one to one correspondence. By actuating switches 6 under the control of control unit 7, drivers 5 can be connected to actuators 3 in one to one correspondence. In a printing operation, drivers 5 are normally connected to actuators 2 through switches 6 and printing takes place using all the hammer actuators 1, 2 as required. This results in the printing of characters in a line of normal length. If characters are to be pr...