Browse Prior Art Database

Adjustable Printhead Mount

IP.com Disclosure Number: IPCOM000043206D
Original Publication Date: 1984-Jul-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 89K

Publishing Venue

IBM

Related People

Bush, HG: AUTHOR [+2]

Abstract

A printhead having a vertical column of print wires is mounted on a post by members independently adjustable in the vertical and tilt attitudes. Referring to Fig. 1, mounting member 1 fits on post 3 and is adjusted vertically on post 3. Sleeve 5 in member 1 receives post 7 of printhead 9 and is adjusted rotatably around the axis of post 7 to eliminate character-slant. Fig. 2 illustrates three characters printed by printhead 9 against platen 11 with different rotation adjustments. The right character is correct, while the other two are slanted. When head 9 is rotated to that correct position, sleeve 5 is clamped tightly on post 7 by advancing clamp screw 13. Adjusting sleeve 15 fits over post 3 and has internal threads 17 which engage external threads 19 of post 3.

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Adjustable Printhead Mount

A printhead having a vertical column of print wires is mounted on a post by members independently adjustable in the vertical and tilt attitudes. Referring to Fig. 1, mounting member 1 fits on post 3 and is adjusted vertically on post 3. Sleeve 5 in member 1 receives post 7 of printhead 9 and is adjusted rotatably around the axis of post 7 to eliminate character-slant. Fig. 2 illustrates three characters printed by printhead 9 against platen 11 with different rotation adjustments. The right character is correct, while the other two are slanted. When head 9 is rotated to that correct position, sleeve 5 is clamped tightly on post 7 by advancing clamp screw 13. Adjusting sleeve 15 fits over post 3 and has internal threads 17 which engage external threads 19 of post 3. Sleeve 15 fits closely between top and bottom extensions 21 of mounting member 1. Fig. 3 illustrates the printing of three characters by printhead 9 against platen 11 with different vertical adjustments. The right character is correct, while the other are either high or low. The correct position is achieved by rotating sleeve 15, resulting in threads 17 and 19 moving sleeve 15 and sleeve 15 moving member 1 by its contact with extensions 21. Spring 23 presses on the outside of sleeve 15 to provide detenting which prevents the turning of sleeve 15 from the vibrations of normal use. The outside of sleeve 15 is knurled to positively engage a nipple 25 on spring 23 and also to provide a gripping surface for the turning of sleeve 15. The knurlin...