Placeholder image

HP awarded more refill patents

August 10, 2012

OEM granted two further refill patents, following a successful acquisition of an anti-remanufacturing patent in June 2012.

HP has been awarded with two refill patents, relating to both “a method of refilling a used inkjet cartridge” and “a method of introducing ink into an ink cartridge”.

Patent EP 2 091 746 B 1 refers to a method of refilling a used inkjet cartridge, which entails “introducing ink into the cartridge at a first pressure sufficient to displace air from the printhead; and then continuing to introduce ink into the cartridge but at a second pressure lower than the first pressure;

“Wherein the cartridge includes an ink holding material in an ink holding chamber and the second pressure is low enough so that ink introduced into the cartridge at the second pressure will saturate substantially all of the ink holding material before overflowing the ink holding chamber”.

The second patent, EP 2 091 743 B 1 (pictured) pertains to a method of introducing ink into an ink cartridge, utilising ink ejection nozzles and an ink holding chamber.

The methodology as noted in the patent document is as follows: “Performing a primary operation on the ink holding chamber by introducing ink into the ink holding chamber through the ink ejection nozzles; and performing a secondary operation on the ink holding chamber to increase the flow of ink to a distal part of the ink holding chamber relative to the flow of ink to a proximal part of the ink holding chamber, characterised in that […]

“The secondary operation comprises simultaneously with introducing ink into the ink holding chamber through the ink ejection nozzles, introducing ink into the ink holding chamber through one or more openings other than the ink ejection nozzles”.

HP and Canon have both recently been awarded refill patents. HP was granted a patent pertaining to an ink tank, notable as it allows the OEM to be able to prevent refilling and remanufacturing of a cartridge if it utilises said ink tank, while Canon was also allocated a patent related to cartridge recycling.

Samsung has also recently applied for a number of anti-remanufacturing patents aimed at detecting the number of times a cartridge has been refilled or remanufactured and a sensor to detect device manipulation.

Categories : World Focus

Tags :

Leave a Reply