Vacuum/Pressure Head for Applying Barrier Between Color Bands of Multi-Color Printer Ribbon
Original Publication Date: 1987-Jul-01
Included in the Prior Art Database: 2005-Feb-01
Multi-color printer ribbon technology is known in which the porous base media is impregnated with stripes of a barrier substance between the dye-based color bands to prevent color interfusion. A vacuum/pressure head provides an improved means for applying a fine, well-defined stripe of barrier material which thoroughly saturates the base media. The figure shows the elements of the vacuum/pressure head system. It is seen that as ribbon 1 passes between pressure nozzle 2 and vacuum head 3, barrier material 4, internal to the pressure system, is forced to and through the ribbon. The pressure causes slight distortion 5 of the ribbon as it passes over the application nozzle, opening the fabric weave to enhance deposition of the barrier material. Excess material 6 is exhausted through the vacuum system.