Dot matrix printing device employing novel image transfer technique for printing on single ply or multiple ply print receiving media

US4279519A · kind A · utility

Assignee

• Centronics Data Computer Corporation · US

Inventor

• John Shiurila · Londonderry, US

Key dates

• Filing date: Jun 1, 1979
• Grant date: Jul 21, 1981
• Expiry date: Jun 1, 1999

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41J2/305
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A dot matrix impact printer having print wires reciprocating within a print head. A bearing guides printing tips in the nose of the print head. Liquid printing material stored within a container adjacent to the print head is delivered by a wick from the container to the sides of the print wires by capillary action. The liquid printing material works its way through the jewel bearing of the print head and on to the printing tips of the print wires whereupon it is transferred to the print receiving medium when impacted by the print wires. Porous absorbent members, adapted to expand upon wetting, engage the print wires at a location between said wick and said jewel bearing to regulate the flow of liquid printing material toward the printing tips to prevent dripping or dribbling of the liquid printing material from the print head and to prevent the liquid printing material from travelling along the print wires away from said jewel bearing and toward the print wire actuating means. The wick is mounted within a removable holder slidably inserted into the nose of the print head greatly facilitating assembly and disassembly of the apparatus for replacement of the disposable wick and facili…