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Dual Density Printing

IP.com Disclosure Number: IPCOM000061794D
Original Publication Date: 1986-Sep-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Helinski, EF: AUTHOR [+2]

Abstract

An interposer mechanism is used with a row of print hammers to enable impact printing of characters from a revolving type band at either of two print densities. As seen in Fig. 1, the interposer mechanism comprises interposer elements 10 and 11 positioned between hammer elements (not shown) and a rotating type band 12 separated by continuous paper forms 13 and ink ribbon 14. Interposer element 10 is a comblike structure comprising uniformly spaced flexure elements 15 extending from rigid mounting bar 16 which is stationary. Flexure elements 15 terminate in an impact head 15a having an impact face width spanning a single print position.

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Dual Density Printing

An interposer mechanism is used with a row of print hammers to enable impact printing of characters from a revolving type band at either of two print densities. As seen in Fig. 1, the interposer mechanism comprises interposer elements 10 and 11 positioned between hammer elements (not shown) and a rotating type band 12 separated by continuous paper forms 13 and ink ribbon 14. Interposer element 10 is a comblike structure comprising uniformly spaced flexure elements 15 extending from rigid mounting bar 16 which is stationary. Flexure elements 15 terminate in an impact head 15a having an impact face width spanning a single print position. Interposer 11 is a comblike structure comprising uniformly spaced flexure elements 17 extending from mounting bar 18 which is movable horizontally, as shown by arrow 19, relative to mounting bar 16. Flexure elements 17 terminate in impact heads 17a having an impact face whose span is greater than one print position. The relative horizontal spacing between impact heads 15a of flexure elements 15 and the horizontal spacing between impact heads 17a of impact elements 17 is such that heads 17a are movable to several different horizontal print positions, thereby enabling printing of characters 20 from moving type band 12 at a higher horizontal print density than the density obtained when printing directly using uniformly spaced print hammers to impact paper 13 and ribbon 14 against characters. In the arrangement sh...