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Color Adjustment for Daisy Wheel Printers

IP.com Disclosure Number: IPCOM000045661D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Klein, WF: AUTHOR [+2]

Abstract

In daisy wheel printers it is typical to require a final assembly adjustment for "color". By "color" it is meant that when a character is printed, all parts of the printed character are of the same color level, intensity, or darkness. This means that the character on a petal of the daisy wheel should strike the ribbon and paper on a line 5 that goes through the center of the character and through the center of 5 the platen. Described is an adjustment which simplified the positioning adjustment and lessen setup time in final assembly and test of the printer.

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Color Adjustment for Daisy Wheel Printers

In daisy wheel printers it is typical to require a final assembly adjustment for "color". By "color" it is meant that when a character is printed, all parts of the printed character are of the same color level, intensity, or darkness. This means that the character on a petal of the daisy wheel should strike the ribbon and paper on a line 5 that goes through the center of the character and through the center of 5 the platen. Described is an adjustment which simplified the positioning adjustment and lessen setup time in final assembly and test of the printer.

Referring now to the drawing, a typical printer carrier 10 for a daisy wheel printer is illustrated. As shown, the carrier includes a wheel or the like 11 for riding on a rail 12 associated with the frame 13 of the printer. The opposite end of the carrier 10 is connected, as through a boss or sleeve 14, to a carrier guide rail 15 for providing translation of the carrier along a path parallel to the platen 16, in the present instance into and out of the plane of the drawing. As may be surmised, the carrier guide rail 15 is captured in suitable bosses in the frame.

Mounted on the carrier is a selection motor 20 connected to a print wheel 21 to implement character selection and interpose the petals 22 of the print wheel intermediate a type ribbon (not shown) and a hammer 23 so that characters may be printed upon paper (not shown) on the platen 16. In order to insure that...