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Printhead Spacing Adjustment for Paper Thickness

IP.com Disclosure Number: IPCOM000046812D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07

Publishing Venue

IBM

Related People

Authors:
Rex, DK [+details]

Abstract

In impact printers the spacing of the print element relative to the ribbon and paper is important for producing uniform print quality and avoiding damage to the ribbon and/or print element (particularly in wire-matrix-type printers). In many printers a manual adjustment is required to adapt the spacing for different thicknesses of paper. This is subject to operator error, either failure to set the adjustment or improper adjustment due to faulty judgment. The arrangement described here provides automatic and accurate spacing adjustment. In the illustrated arrangement, printhead carrier 1, carried on rod 2 relative to paper 3 and a ribbon (not shown) (for establishing character printing positions), positions printhead/element 4 for printing characters serially on the paper. The paper is backed by platen 5.