Electrophotography – Internal machine environment – Forced air circulation
Reexamination Certificate
1999-12-29
2001-08-14
Grainger, Quana M. (Department: 2852)
Electrophotography
Internal machine environment
Forced air circulation
C399S093000
Reexamination Certificate
active
06275670
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a liquid electrophotographic printer, and more particularly, to a liquid electrophotographic printer which can remove ozone generated therein.
2. Description of the Related Art
A liquid electrophotographic printer such as a color laser printer, as shown in
FIG. 1
, includes a photosensitive belt
1
making circular movement along an endless track, a topping corona device
2
for charging the photosensitive belt
1
into a predetermined potential, a laser scanner
3
for irradiating laser onto the charged photosensitive belt
1
to form an electrostatic latent image, a development unit
4
for developing the electrostatic latent image to an image having a predetermined color, and a transfer unit
5
for printing the developed image on a sheet of paper S. Thus, as printing proceeds, the topping corona device
2
charges the photosensitive belt
1
into a predetermined potential and the laser scanner
3
irradiates laser onto the charged photosensitive belt
1
to form the electrostatic latent image. The development unit
4
develops the electrostatic latent image to then be printed on the sheet S by the transfer unit
5
. Reference numeral
6
represents a drier for drying the image developed on the photosensitive belt
1
to be suitable for the printing operation.
The topping corona device
2
charges the photosensitive belt
1
in a non-contact type using a discharge phenomenon. Thus, in the case of the discharge of the topping corona device
2
, the oxygen contained in the ambient air may be turned into ozone O
3
. If a large amount of ozone is generated, some of the generated ozone may be effused to the outside of the printer, causing environmental contamination. Therefore, there is increasing demand for printers which can remove ozone.
SUMMARY OF THE INVENTION
To solve the above problem, it is an objective of the present invention to provide a liquid electrophotographic printer with an improved structure which can remove ozone generated within the printer.
Accordingly, to achieve the above objective, there is provided a liquid electrophotographic printer having topping corona devices for charging a photosensitive belt, a laser scanner for forming an electrostatic latent image on the charged photosensitive belt, and a development unit for developing the electrostatic latent image to an image having a predetermined color, the liquid electrophotographic printer including an exhaust guide forming a movement path of air so that the air moves from places around the topping corona devices to the outside of the printer, a filter for filtering impurity contained in the air passing through the exhaust guide, and an induction pump for allow air to flow from the places around the topping corona devices to the filter through the exhaust guide.
REFERENCES:
patent: 5946528 (1999-08-01), Cho
patent: 56-69746 (1979-11-01), None
patent: 63-158576 (1988-07-01), None
patent: 2-253289 (1990-10-01), None
patent: 2-273764 (1990-11-01), None
patent: 08-314337 (1996-11-01), None
patent: 10-20724 (1998-01-01), None
Cho Min-Su
Jung Woo-chul
Grainger Quana M.
Samsung Electronics Co,. Ltd.
Sughrue Mion Zinn Macpeak & Seas, PLLC
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