Plastic-Backed Contact Strip for Flight-Time Determination in Impact Printers
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
For determining the flight time of a print hammer 3, a contact strip 2 is placed on platen 4. When print hammer 3 hits contact strip 2, at least two line bars 5 of the contact strip are bridged by print hammer 3 for a signal flow. As the occurrence of this signal flow and the firing time of the print hammer are interrelated, the flight time is determined by these two factors. To compensate for the absence of a ribbon or record carrier (steel band in the case of steel band printers), contact strip 2 is backed with a deformable plastic strip 1. To prevent hammer breakdown at high impact speeds, plastic strip 1 has an E-shaped cross-section.