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Variable Color Control - Move Print Wheel Character Up or Down Relative to Platen

IP.com Disclosure Number: IPCOM000046079D
Original Publication Date: 1983-May-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Jennings, JH: AUTHOR

Abstract

To insure uniform density or color of characters printed with a daisy wheel impact printer, it is necessary to conform the curvature of the character face 10 with the curvature of the platen 12 inasmuch as the platen axis and the guide rail 14 are both spacially fixed. Due to manufacturing tolerances and other factors which will result in potential misalignment of the type face 10 with the platen 12, it is desirable to provide an up/down adjustment for the print wheel.

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Variable Color Control - Move Print Wheel Character Up or Down Relative to Platen

To insure uniform density or color of characters printed with a daisy wheel impact printer, it is necessary to conform the curvature of the character face 10 with the curvature of the platen 12 inasmuch as the platen axis and the guide rail 14 are both spacially fixed. Due to manufacturing tolerances and other factors which will result in potential misalignment of the type face 10 with the platen 12, it is desirable to provide an up/down adjustment for the print wheel.

The motor plate supports the selection motor of the daisy wheel printer. The motor plate is mounted in the carrier housing 18 which translates along guide rail 14 to present the print element type faces 10 in proximity to the platen 12. The motor platen 16 is shown in its withdrawn position, but may be rocked forward to place the typeface 10 relatively close to the platen 12 for printing.

In order to adjust the typeface 10 vertically to insure that both the top and bottom of the character are equally dense at the time of printing, a lever 20 is engaged at 22 which serves as a fulcrum on frame 18. Fulcrum 22 extends completely across frame 18 and parallel to guide rail 14. Lever 20 also has a rigid cross member 24 attached thereto to operate a similar member on the opposite side of the carrier housing 18. By depressing lever 20, the lever will engage the pivot shaft portion of motor plate 16. Pivot shaft portion 26 wil...