Device for removing and depositing droplets of at least one liquid, method of using the device and servo system for said method
First Claim
1. Device for drawing and depositing droplets (100, 200) of at least one liquid (32), comprising:
- an outer tube (101) with an opening (107) at one of its ends;
a flange (109) defining said opening (107);
a rod (111, 211, 221) capable of sliding inside said outer tube (101);
an inner volume (117) between said rod (111, 211, 221) and the outer tube (101);
a capillary-sized port (119) open in the wall of said outer tube (101), so that a pressure equal to that outside said port (119) is established in the inner volume (117);
an element for closing (113, 213) said opening (107) connected to said rod (111, 211, 221), and in which, when said rod (111, 211, 221) is in a forward end position, said closure element (113, 213) comes into contact with the flange (109) and thus hermetically closes said opening (107) while, when the rod is not in this end position, a capillary-sized passage (115) enables the inner volume (117) to communicate with the outside.
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Accused Products
Abstract
The invention proposes the drawing and deposition of liquid droplets while preventing any contact with the ambient air before the liquid is deposited, by providing a device which can be closed, and which can be supplied to the user in the form of a pre-filled cartridge.
In a preferred embodiment of the invention, the device for drawing and depositing droplets (100) of at least one liquid (32) comprises an outer tube (101) with an opening (107) at one of the ends thereof, a flange (109) defining the opening (107), a rod (111, 211, 221) which can slide inside said outer tube (101), an inner volume (117) between said rod (111, 211, 221) and the outer tube (101), a capillary-sized open port (119) in the wall of said outer tube (101), and a closure element (113, 213) for closing said opening (107), connected to said rod (111, 211, 221). According to the invention, when said rod (111, 211, 221) is in a forward end position, said closure element (113, 213) comes into contact with the flange (109) and thus hermetically closes said opening (107) and, when said rod is not in this end position, a capillary-sized passage (115) enables the inner volume (117) to communicate with the outside.
24 Citations
42 Claims
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1. Device for drawing and depositing droplets (100, 200) of at least one liquid (32), comprising:
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an outer tube (101) with an opening (107) at one of its ends;
a flange (109) defining said opening (107);
a rod (111, 211, 221) capable of sliding inside said outer tube (101);
an inner volume (117) between said rod (111, 211, 221) and the outer tube (101);
a capillary-sized port (119) open in the wall of said outer tube (101), so that a pressure equal to that outside said port (119) is established in the inner volume (117);
an element for closing (113, 213) said opening (107) connected to said rod (111, 211, 221), and in which, when said rod (111, 211, 221) is in a forward end position, said closure element (113, 213) comes into contact with the flange (109) and thus hermetically closes said opening (107) while, when the rod is not in this end position, a capillary-sized passage (115) enables the inner volume (117) to communicate with the outside. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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- 23. Device according to claim, wherein the capillary-sized port (119) is connected to a container (219) containing an inert gas.
Specification