Apparatus for protecting a lens array of a printhead used for co

Details Apparatus for protecting a lens array of a printhead used for co Apparatus for protecting a lens array of a printhead used for co

1997-07-31

1999-08-10

Le, N.

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

347263, 347 14, 347 23, 399114, 399207, B41J 2235

Patent

active

059366524

ABSTRACT:
According to one aspect of the present invention, there is provided a printhead protective cover (50) which includes a shutter blade (60), an actuator (70) for moving the shutter blade (60), and a light trap (54) to prevent light from the printhead (12) from passing around the shutter blade (60). In one embodiment, a sensor detects a position of the shutter blade (60) and sends a signal to shutoff the actuator (70) when the shutter blade (60) is in an open position, or the shutter blade (60) is in a closed position. In yet another embodiment, the actuator (70) closes the shutter blade (60) in response to a tear in a web or failure of a dryer. In a further embodiment, the shutter blade (60) slides on a base plate coated with a low friction, non-volatile, non-liquid material, and the shutter blade (60) slides at an oblique angle on the base plate.

REFERENCES:
patent: 5032005 (1991-07-01), Woodruff
patent: 5192973 (1993-03-01), Hickisch
patent: 5237347 (1993-08-01), Teshigawara et al.

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