Ink storage module with displaceable upper and lower plates and displaceable upper and lower collars
View Patent ↗An ink storage module for a printer cartridge includes upper and lower plate members and an ink bag located between the upper and lower plate members to define an ink volume, said lower plate member displaceable towards and away from the upper plate member; a bag constrictor assembly having an upper collar, a lower collar, and a plurality of bowed panels extending between the upper and lower collar, the upper collar being displaceable towards the lower collar; a lid to which the upper plate member is fixedly attached, the lid having a first port and a second port both in fluid communication with the ink bag; and a valve insert located between the lid and the ink bag, said valve insert having an inlet valve and an outlet valve arranged in fluid communication with respective first and second ports in the lid, the inlet valve facilitating refilling of the bag with ink, and the outlet valve to facilitate ink delivery to the printhead. The bowed panels bow inwardly onto the ink bag when the upper collar is displaced towards the lower collar.
1. An ink storage module for a printer cartridge, said ink storage module comprising:
upper and lower plate members and an ink bag located between the upper and lower plate members to define an ink volume, said lower plate member displaceable towards and away from the upper plate member;
a bag constrictor assembly having an upper collar, a lower collar, and a plurality of bowed panels extending between the upper and lower collar, the upper collar being displaceable towards the lower collar;
a lid to which the upper plate member is fixedly attached, the lid having a first port and a second port both in fluid communication with the ink bag; and
a valve insert located between the lid and the ink bag, said valve insert having an inlet valve and an outlet valve arranged in fluid communication with respective first and second ports in the lid, the inlet valve facilitating refilling of the bag with ink, and the outlet valve to facilitate ink delivery to the printhead, wherein
the bowed panels bow inwardly onto the ink bag when the upper collar is displaced towards the lower collar.
2. The storage module of claim 1 , further comprising a biasing mechanism engaged with the plate members to bias the plate members away from each other such that a negative pressure is maintained in the ink volume.
3. The storage module of claim 1 , wherein the lower plate slides within the lower collar.
4. The storage module of claim 3 , wherein the lid includes four corner struts extending from the lid towards the lower collar, and the lower collar slides along the four corner struts.
5. The storage module of claim 3 , wherein the lid defines apertures therein to allow constrictor actuators of a refill unit to extend through the apertures to push the upper collar towards the lower collar.
6. The storage module of claim 1 , wherein the inlet valve and the outlet valve are configured to operate in an alternate manner so that one is sealed when the other is open to maintain pressure inside the bag.
7. The storage module of claim 1 , further comprising a filter cover positioned between the valve insert and the ink bag to filter contaminants and air bubbles passing therethrough.
8. The storage module of claim 1 , wherein the ink bag is made from a flexible and air impermeable thermoplastic film which allows ink to be retained therein in a pressurised state.