Prevention of Ribbon Breakage With a Multi-Line Resistive Ribbon Print Head
Original Publication Date: 1988-Jan-01
Included in the Prior Art Database: 2005-Feb-14
A relatively simple and accurate method is described for protecting the ribbon in a resistive ribbon-type printer. It reliably identifies the cases that would cause a ribbon breakage but does not overburden the printer with processing demands. The advantages and trade-offs are carefully weighed and selected to create a method of ribbon protection that is both fast and effective. Resistive ribbon-type printers that can print more than one line of text at a time must limit the number of "on" electrodes to prevent the ribbon from breaking. The number of "on" electrodes is limited by reducing the height of each print pass to the number of pels that may be safely turned on simultaneously. A technique is employed to allow for the fastest and simplest method for identifying print text that could cause the ribbon to break.