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US 7,605,124 B2Granted
Ejection liquid and ejection method
AssigneeCanon Kabushiki Kaisha
InventorsYohei Masada, Masaru Sugita, Hideki Kaneko, Naoko Sakurada
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Abstract
An ejection liquid that allows a solution containing at least one kind of insulins to be stably ejected by an inkjet system using a thermal energy and a method of ejecting the solution containing at least one kind of insulins, using such an ejection liquid. The ejection liquid of the present invention includes at least one kind of insulins, citric acid, and a liquid medium, which can be ejected by providing thermal energy.
Claims7
A method for ejecting an insulin-containing liquid comprising:
- providing a liquid comprising (a) at least one kind of insulin and (b) citric acid;
- and
- ejecting the liquid by a thermal inkjet system,
- wherein content of the at least one kind of insulin in the liquid to be ejected is 1 μg/ml to 200 mg/ml,
- wherein content of the citric acid in the liquid to be ejected is 1 μg/ml to 2.0 g/ml, and
- wherein a drive frequency of the thermal inkjet system is in the range of 0.1 kHz to 100 kHz,
- whereby when the drive frequency is 24 kHz, continuous ejection for at least ten minutes may be achieved.
4 more elements
Dependencies are inferred from the claim text.