Method of making a capillary channel
First Claim
1. A method of making an optical reagent format with a capillary gap, comprising:
- providing a carrier with an insert, said carrier and insert being of a predetermined thickness;
placing said carrier in a mold;
molding a format onto said carrier and insert;
separating said insert from said carrier; and
removing said insert from said format leaving a capillary gap in said format.
2 Assignments
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Accused Products
Abstract
An optical reagent format with a precise capillary channel is made by molding a format on a carrier of a precise predetermined thickness. The carrier includes an insert at least a portion of which is molded in the format. Once the format is made, the insert is detached from the carrier and removed from the format leaving a precisely dimensioned capillary channel with an inlet and vent. A reagent may be applied in the capillary channel and the format used to measure the analyte in a fluid such as blood. An electrochemical sensor with a capillary channel is formed by placing a sacrificial insert and electrodes on a sensor base and applying plastic material. After the plastic material is cured, the sacrificial is removed leaving a capillary channel in the sensor. The inserts may be removed by a tool including a clamp for clamping and holding each insert stationary and a sliding block to which the sensor is secured.
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Citations
18 Claims
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1. A method of making an optical reagent format with a capillary gap, comprising:
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providing a carrier with an insert, said carrier and insert being of a predetermined thickness;
placing said carrier in a mold;
molding a format onto said carrier and insert;
separating said insert from said carrier; and
removing said insert from said format leaving a capillary gap in said format. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of making an optical reagent format with a capillary gap, comprising:
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providing a carrier of a predetermined thickness;
providing an insert on said carrier;
molding a format onto said carrier and said insert with a portion of said insert extending out of said format; and
removing said insert from said format to provide a capillary channel with an inlet and a vent in said format formed by said insert. - View Dependent Claims (10, 11, 12, 13)
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14. A method of molding an electrochemical sensor using a sacrificial insert, comprising:
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providing a first mold;
inserting a first electrical contact in said first mold;
inserting a second electrical contact in said first mold;
closing said first mold with a second mold;
injecting material for forming a sensor into said closed first and second molds;
curing said material; and
extracting said sacrificial insert from said sensor. - View Dependent Claims (15)
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16. A tool for extracting a sacrificial insert from an electrochemical sensor, comprising:
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a clamp for clamping a sacrificial insert in a stationary position;
a first block moveable relative to said clamp;
a drive member for moving said block relative to said clamp; and
an attachment member on said block to attach a sensor with a sacrificial insert onto said block. - View Dependent Claims (17)
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18. A sensor, comprising:
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a sensor body;
a first access window in said sensor body;
a second access window in said sensor body; and
an insert in said sensor body between said first access window and said second access window.
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Specification