Method for producing a membrane ring or test strip ring and ring magazine
AssigneeRoche Diabetes Care, Inc.
InventorHerbert Harttig
Life of this patent
Estimating the term…
Abstract
A method for producing a membrane ring or test strip ring for a diagnostic test device includes an elongate strip that is divided into segments by cuts running transversely to the longitudinal direction of the strip, where the cuts are made only as far as a residual width of the strip so that a material bridge remains intact between the segments adjacent to the cuts (24). The strip is closed by bringing its ends together to form a ring where the cut edges of the cuts running towards the material bridges each enclose an acute angle (α). The ring is inserted into a support structure as a membrane ring or test strip ring for the test device.
Claims44
A method for producing a diagnostic test device for examining body fluids, the method comprising the steps of:
- a) forming a starting material from one of a foil coated with a reactive test chemistry and a membrane that is at least partially permeable to body fluid to filter the body fluid passing through the membrane;
- b) cutting an elongate strip of the starting material into segments, such that the elongate strip includes two ends and the segments are divided by cuts running transversely to a longitudinal direction of the elongate strip, wherein the cuts are made to maintain a material bridge between the segments adjacent to the cuts;
- c) closing the elongate strip by bringing the ends together to form a ring, wherein cut edges of each of the cuts running towards the material bridges diverge from adjacent cuts and enclose an acute angle;
- d) providing a support structure for the diagnostic test device, the support structure having a disc-shaped housing that includes a plurality of chambers;
- e) inserting the ring into the disc-shaped housing so that each of the segments is allocated to a respective one of the chambers of the housing;
- and
- wherein the elongate strip is cut to a residual width of 0.1 to 1.0 mm that remains as the material bridge.
A method for producing a diagnostic test device for examining body fluids, the method comprising the steps of:
- a) forming a starting material from one of a foil coated with a reactive test chemistry and a membrane that is at least partially permeable to body fluid to filter the body fluid passing through the membrane;
- b) cutting an elongate strip of the starting material into segments, such that the elongate strip includes two ends and the segments are divided by cuts running transversely to a longitudinal direction of the elongate strip, wherein the cuts are made to maintain a material bridge between the segments adjacent to the cuts and wherein the elongate strip is cut to maintain a residual width of between 2% and 20% of a width of the elongate strip as the material bridge;
- c) closing the elongate strip by bringing the ends together to form a ring, wherein cut edges of each of the cuts running towards the material bridges diverge from adjacent cuts and enclose an acute angle;
- d) providing a support structure for the diagnostic test device, the support structure having a disc-shaped housing that includes a plurality of chambers;
- and
- e) inserting the ring into the disc-shaped housing so that each of the segments is allocated to a respective one of the chambers of the housing.
A ring magazine for a diagnostic test device for examining body fluids, comprising:
- a support structure and a ring inserted in the support structure;
- wherein the ring includes an elongate strip of starting material cut into segments divided by cuts running transversely to a longitudinal direction of the elongate strip;
- wherein the cuts are made to maintain a material bridge between the segments adjacent to the cuts and the elongate strip is closed by bringing opposite ends of the elongate strip together to form the ring;
- wherein the cuts running transversely to a longitudinal direction of the elongate strip extend through between 80% to 98% of the elongate strip to maintain the material bridge;
- wherein cut edges of each of the cuts running towards the material bridges diverge from adjacent cuts and enclose an acute angle;
- and
- wherein the support structure includes a plurality of test chambers and each of the segments is allocated to a respective one of the test chambers of the support structure to provide a filter or a detection element configured for a single test for examining the body fluid.
Dependencies are inferred from the claim text.