Browse Prior Art Database

Ribbon Shield

IP.com Disclosure Number: IPCOM000060381D
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 67K

Publishing Venue

IBM

Related People

Taylor, CE: AUTHOR

Abstract

This article describes a ribbon shield device which prevents ribbon lift, ribbon foldover and ink smear on continuous paper forms. The device accomplishes this by eliminating as much contact as possible between the inked ribbon and the continuous forms. The printing device utilizing the structure of the present disclosure is a wire matrix printer with a lateral moving printing device and a solid stationary platen. The gap between the printhead and the platen is necessarily close, due to the limited stroke of the print actuators. For this reason, it is necessary to introduce a thin film between the print actuator carrier and the platen. The limited thickness of this thin film does not provide adequate support for itself when mounted in the machine.

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Ribbon Shield

This article describes a ribbon shield device which prevents ribbon lift, ribbon foldover and ink smear on continuous paper forms. The device accomplishes this by eliminating as much contact as possible between the inked ribbon and the continuous forms. The printing device utilizing the structure of the present disclosure is a wire matrix printer with a lateral moving printing device and a solid stationary platen. The gap between the printhead and the platen is necessarily close, due to the limited stroke of the print actuators. For this reason, it is necessary to introduce a thin film between the print actuator carrier and the platen. The limited thickness of this thin film does not provide adequate support for itself when mounted in the machine. To provide the support necessary, a thicker film is laminated to the thinner film. This thicker film provides the support necessary to provide a thin slotted film through which printing takes place. Fig. 1 is a side view of the printing device disclosed herein. A ribbon shield 1 is provided which prevents ribbon lift, ribbon foldover and ink smearing on continuous paper forms 2. It is important to eliminate as much contact as possible between an inked ribbon 3 and the continuous forms. The printer includes a lateral moving print head 4 and a stationary platen 5. The gap 6 between the printhead and the platen is necessarily small, e.g., eleven thousandths of an inch, due to the limited stroke of the print wires. The ribbon and the forms must pass through this gap during printing, the forms being moved at a high rate of speed in a direction traverse to that of the slow moving ribbon, as shown in the front view of Fig. 2. Because the forms are relati...