Ink refill unit having a linearly actuated plunger assembly
First Claim
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1. A dispensing assembly for a printing fluid refill cartridge, the dispensing assembly comprising:
- a body for storing printing fluid having an outlet through which the printing fluid is dispensed;
a plunger biased to reduce the storage capacity of the body and expel the printing fluid through said outlet, the plunger having a series of grooves arranged along a surface of the plunger; and
,a movable retaining member for selectively engaging the grooves such that disengagement of the retaining member from the grooves allows the bias on the plunger to expel the printing fluid and engagement of the movable retaining means and the grooves prevents relative movement the plunger and the body.
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Abstract
A dispensing assembly for a printing fluid refill cartridge, that has a body for storing printing fluid having an outlet through which the printing fluid is dispensed, and a plunger arranged to selectively change the storage capacity of the body and expel the printing fluid through the outlet by selective engagement of a movable retaining member with a series of grooves arranged along a surface of the plunger, thereby dispensing a selected amount of printing fluid from the outlet.
21 Citations
9 Claims
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1. A dispensing assembly for a printing fluid refill cartridge, the dispensing assembly comprising:
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a body for storing printing fluid having an outlet through which the printing fluid is dispensed; a plunger biased to reduce the storage capacity of the body and expel the printing fluid through said outlet, the plunger having a series of grooves arranged along a surface of the plunger; and
,a movable retaining member for selectively engaging the grooves such that disengagement of the retaining member from the grooves allows the bias on the plunger to expel the printing fluid and engagement of the movable retaining means and the grooves prevents relative movement the plunger and the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification