The HP P2015dn is a good mono laser printer for the home, small office, or dorm room: it’s compact and fast and (usually) produces decent text and graphics.
The HP LaserJet P2015dn series are fairly compact, making them a good fit for cluttered home offices and cramped apartments and dorm rooms. The $500, P2015dn model measures 13.8 inches wide, 14.3 inches deep, and 10.1 inches tall, and weighs just 24.3 pounds. The muted light- and dark-gray color scheme gives HP Laser Jet P2015dn printer a plain look. The main paper cassette of this mono laser printer holds up to 250 sheets of plain paper. Using the high-capacity cartridge, print costs work out to about 2.1 cents per page for text–a reasonable cost that’s in line with other printers of its class. The $400 P2015dn adds a built-in duplexer. This cheap printer consists of 400MHz processor and 32MB of RAM, which can be upgraded to 288MB.
The $500, cheap P2015dn is a fast mono printer, churning out text at a rate of 22.13ppm and graphics at a rate of 21.29ppm. The text quality of P2015dn text is excellent. The text obtained is sharp, clean and characters were consistently formed. Graphics prints of this mono laser printer showed decent quality. A bit of compression in the light end of the grayscale can also be seen on the paper. Additionally, the photo elements were grainy. Overall, the print quality of HP Laser Jet P2015dn is better than its competitors.
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Ink cartridge Claims
What is claimed is:
1. A sub-tank comprising: an ink inlet for receiving ink; an ink outlet for supplying ink; an ink storage chamber connected to said ink outlet; a valve housing chamber connected to said ink inlet; a valve disposed in said valve housing chamber; a partition wall provided between said ink storage chamber and said valve housing chamber, and formed with a communicating hole communicating with said ink storage chamber and said valve housing chamber; and an urging unit disposed in said valve housing chamber and urging said valve toward said partition wall wherein when a pressure in the ink storage chamber is above a predetermined value, said valve is brought into contact with said partition wall and seals said communicating hole; and wherein when the pressure in the ink storage chamber is below a predetermined value, said valve is seperated from said partition wall and opens said communicating hole, so that ink flows through said communicating hole from said valve housing chamber to said ink storage chamber. (more ink cartridges…)