Capping device for ink jet printers

Details Capping device for ink jet printers Capping device for ink jet printers

1989-09-06

1991-10-08

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346140R, B41J 2165

Patent

active

050558560

ABSTRACT:
A capping device for an ink jet printer includes a cap supported on a cap support member adapted to press the cap against a print head with a uniform pressure distribution despite variation in the positional relationship between the print head and the cap support member. After the cap is sealed around an ink orifice of the printer, a preliminary suction operation reduces the pressure within a cavity defined by the cap and the print head. The pressure within the cavity is then returned to atmospheric pressure and then reduced again, but to a level which will not interfere with the ink meniscus level in the print head. The first period of suction lasts longer than the second suction period. By providing the capping device with tubes which resist the corrosive effects of ink and prevent gas from penetrating therethrough, excessive air buildup within the print head can be avoided.

REFERENCES:
patent: 4429320 (1984-01-01), Hattori
patent: 4684963 (1987-08-01), Naka
patent: 4825231 (1989-04-01), Nozaki
patent: 4829318 (1989-05-01), Racicot

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