Dot matrix printing device employing novel image transfer techni

Details Dot matrix printing device employing novel image transfer techni Dot matrix printing device employing novel image transfer techni

1979-06-01

1981-07-21

Pieprz, William

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

4002022, 4004711, B41J 312, B41J 2720

Patent

active

042795192

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 facilitating removal of the porous absorbent members. A separator tool retains the wick in proper position preparatory to insertion of the holder. The disposable container is releasably mounted on a support adjacent to the print head nose and is easily removed and replaced.

REFERENCES:
patent: 414846 (1889-11-01), Smith
patent: 2530697 (1950-11-01), Higgins
patent: 3400801 (1968-09-01), Swenson
patent: 4027766 (1977-06-01), Sargentini et al.
patent: 4153378 (1979-05-01), Scherrer et al.
patent: 4165188 (1979-08-01), Rempel
patent: 4194846 (1980-03-01), Zerillo
Lisinski, "Print Wire Inking System", IBM Technical Disclosure Bulletin, vol. 14, No. 10, p. 2980, 3/72.
Danwin et al., "Magnetic Method of Inking Print Wires", IBM Tech. Discl. Bulletin, vol. 18, No. 9, p. 2761, 2/76.
Lisinski et al., "Self-Inking Print Wires", IBM Technical Disclosure Bulletin, vol. 14, No. 9, p. 285, 2/72.

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